SLCA / U.S. Silica Holdings, Inc. - SEC फाइलिंग, वार्षिक रिपोर्ट, प्रॉक्सी स्टेटमेंट

SLCA / U.S. Silica Holdings, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2 )* US Silica Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 90346E103 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which thi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as specified

As filed with the Securities and Exchange Commission on August 1, 2024

As filed with the Securities and Exchange Commission on August 1, 2024 Registration Nos.

EX-99.25

NOTIFICATION OF THE REMOVAL FROM LISTING AND REGISTRATION OF THE STATED SECURITIES The New York Stock Exchange hereby notifies the SEC of its intention to remove the entire class of the stated securities from listing and registration on the Exchange at the opening of business on August 12, 2024, pursuant to the provisions of Rule 12d2-2 (a).

As filed with the Securities and Exchange Commission on August 1, 2024

As filed with the Securities and Exchange Commission on August 1, 2024 Registration Nos.

As filed with the Securities and Exchange Commission on August 1, 2024

As filed with the Securities and Exchange Commission on August 1, 2024 Registration Nos.

As filed with the Securities and Exchange Commission on August 1, 2024

S-8 POS As filed with the Securities and Exchange Commission on August 1, 2024 Registration Nos.

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 1, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

As filed with the Securities and Exchange Commission on August 1, 2024

S-8 POS As filed with the Securities and Exchange Commission on August 1, 2024 Registration Nos.

As filed with the Securities and Exchange Commission on August 1, 2024

As filed with the Securities and Exchange Commission on August 1, 2024 Registration Nos.

Changes in Control of Registrant, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Entry into a Material Definitive Agreement, Material Modification to Rights of Security Holders, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Completion of Acquisition or Disposition of Assets

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): July 31, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware 001-35416 26-3718801 (State or other jurisdiction of incorporation) (Commissio

U.S. Silica Completes Transaction with Apollo Funds

Exhibit 99.1 U.S. Silica Completes Transaction with Apollo Funds KATY, TX and NEW YORK, NY – July 31, 2024 – U.S. Silica Holdings, Inc. (“U.S. Silica” or the “Company”), a diversified minerals company and a leading last-mile logistics provider to the oil and gas industry, and Apollo (NYSE: APO) today announced that funds managed by affiliates of Apollo (the “Apollo Funds”) have completed the previ

Amended and Restated Bylaws of the Company.

Exhibit 3.2 BYLAWS OF U.S. SILICA HOLDINGS, INC. Dated as of: July 31, 2024 ARTICLE I OFFICES Section 1. REGISTERED OFFICES. The registered office shall be in Wilmington, Delaware, or such other location as the Board of Directors of the corporation (the “Board of Directors”) may determine or the business of the corporation may require. Section 2. OTHER OFFICES. The corporation may also have office

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

Amended and Restated Certificate of Incorporation of the Company.

Exhibit 3.1 FOURTH AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF U.S. SILICA HOLDINGS, INC. FIRST: The name of this corporation (the “Corporation”) shall be U.S. Silica Holdings, Inc. SECOND: Its registered office in the State of Delaware is to be located at 251 Little Falls Drive, Wilmington, New Castle County, Delaware 19808, United States, and the name of its registered agent at such add

SLCA / U.S. Silica Holdings, Inc. / GLAZER CAPITAL, LLC Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 U.S. Silica Holdings, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 90346E103 (CUSIP Number) July 9, 2024 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Sch

U.S. Silica Announces Stockholder Approval of Acquisition by Apollo Funds

Exhibit 99.1 U.S. Silica Announces Stockholder Approval of Acquisition by Apollo Funds KATY, Texas, July 16, 2024 — U.S. Silica Holdings, Inc. (NYSE: SLCA) (the “Company”), a diversified industrial minerals company and a leading last-mile logistics provider to the oil and gas industry, announced today that its previously announced agreement to be acquired by funds managed by affiliates of Apollo (

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 16, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 15, 2024 U.S. Silica Holding

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 15, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 15, 2024 U.S. Silica Holding

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 15, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 8, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒     Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ D

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

DEFM14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

Calculation of Filing Fee Tables SCHEDULE 14A (Form Type) U.S. SILICA HOLDINGS, INC. (Name of Registrant as Specified in its Charter) Table 1: Transaction Valuation Proposed Maximum Aggregate Value of  Transaction Fee Rate  Amount of Filing  Fee Fees

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Tables SCHEDULE 14A (Form Type) U.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defi

Sixth Amended and Restated U.S. Silica Holdings Inc. 2011 Incentive Compensation Plan, as amended and restated effective May 9, 2024.

Exhibit 10.1 SIXTH AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN (As amended and restated effective May 9, 2024) ARTICLE I PURPOSE The purpose of this Sixth Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan is to enhance the profitability and value of the Company for the benefit of its stockholders by enabling the Company to offer E

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 9, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

Sixth Amended and Restated U.S. Silica Holdings Inc. 2011 Incentive Compensation Plan, as amended and restated effective May 9, 2024 (marked to show changes against prior version).

Exhibit 10.2 FIFTHSIXTH AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN (As amended and restated effective May 119 , 20232024 ) ARTICLE I PURPOSE The purpose of this FifthSixth Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan is to enhance the profitability and value of the Company for the benefit of its stockholders by enabling the

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 26, 2024 U.S. Silica Holdin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 26, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

U.S. Silica Holdings, Inc. Reports First Quarter 2024 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Reports First Quarter 2024 Results •GAAP and adjusted EPS for the quarter of $0.17 and $0.20 per diluted share, respectively •Industrial and Specialty Products segment contribution margin increased 7% year over year •Total tonnage sold company wide increased 6% sequentially •Cash flow from operations of $40.9 million for the quarter •Completed t

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  ) Filed by the Registrant ☒ Filed by a Party other than the Registra

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defi

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 26, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

U.S. Silica Enters Into Definitive Agreement to Be Acquired by Apollo Funds for $1.85 Billion U.S. Silica Stockholders to Receive $15.50 Per Share in Cash

Exhibit 99.1 News Release FOR IMMEDIATE RELEASE U.S. Silica Enters Into Definitive Agreement to Be Acquired by Apollo Funds for $1.85 Billion U.S. Silica Stockholders to Receive $15.50 Per Share in Cash KATY, Texas, April 26, 2024 — U.S. Silica Holdings, Inc. (NYSE: SLCA) (the “Company”), a diversified industrial minerals company and a leading last-mile logistics provider to the oil and gas indust

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

Agreement and Plan of Merger, dated as of April 26, 2024, by and among the Company, Parent and Merger Sub.*

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER by and among STAR HOLDING LLC, STAR MERGER CO. and U.S. SILICA HOLDINGS, INC. Dated as of April 26, 2024 TABLE OF CONTENTS Page ARTICLE I THE MERGER 2 1.1 The Merger 2 1.2 Closing and Effective Time of the Merger 3 ARTICLE II CONVERSION OF SECURITIES IN THE MERGER 3 2.1 Conversion of Securities 3 2.2 Payment for Securities; Surrender of Certificates 4 2.3 D

Current Report

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 26, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

U.S. Silica Announces Successful Completion of Term Loan B Repricing and $25 Million Loan Repurchase

Exhibit 99.1 U.S. Silica Announces Successful Completion of Term Loan B Repricing and $25 Million Loan Repurchase KATY, Texas, March 26, 2024 /PRNewswire/ — U.S. Silica Holdings, Inc. (NYSE: SLCA) (the “Company”), a diversified industrial minerals company and the leading last-mile logistics provider to the oil and gas industry, today announced that the company successfully completed the repricing

Amendment No. 1 to Credit Agreement, dated as of March 25, 2024, by and among USS Holdings, Inc., U.S. Silica Company, the subsidiary guarantors thereto and BNP Paribas, as administrative agent.

Exhibit 10.1 AMENDMENT NO. 1 TO CREDIT AGREEMENT This AMENDMENT NO. 1 TO CREDIT AGREEMENT (this “Agreement”) is made as of March 25, 2024, among USS HOLDINGS, INC., a Delaware corporation, as Parent (“Parent”), U.S. SILICA COMPANY, a Delaware corporation, as Company (“Company”), the Subsidiary Guarantors listed on the signature pages hereto (collectively, the “Subsidiary Guarantors”) and BNP PARIB

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): March 25, 2024 U.S. Silica Holdin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): March 25, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  )

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defi

June 29, 2023

June 29, 2023 Simon Bates 115 Old Cedar Lane Milton, GA 30004 Dear Simon: Re: U.S. Silica Board of Directors On behalf of U.S. Silica Holdings, Inc. (the “Company”), I am pleased to invite you to become a member of the Company’s Board of Directors (the “Board”), effective July 3, 2023. We believe that your skills, expertise and knowledge will prove very helpful to the Company and our stockholders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as spec

U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2023 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2023 Results •GAAP and adjusted EPS for the quarter of $0.37 and $0.28 per diluted share, respectively •Full year 2023 net income of $146.9 million increased 88% year-over-year •Full year 2023 total company contribution margin of $549.7 million increased 16% year-over-year •Full year 2023 cash flow from ope

Jurisdiction of Formation

Exhibit 21.1 Name Jurisdiction of Formation Hourglass Acquisition I, LLC Delaware Preferred Rocks USS Inc. Delaware Hourglass Holdings, LLC Delaware USS Holdings, Inc. Delaware U.S. Silica Company Delaware Pennsylvania Glass Sand Corporation Delaware The Fulton Land and Timber Company Pennsylvania Ottawa Silica Company Delaware Ottawa Silica Company, Ltd. Quebec, Canada Coated Sand Solutions, LLC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 27, 2024 U.S. Silica Hol

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 27, 2024 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

July 13, 2023

July 13, 2023 Jimmi Sue Smith 429 Pine Valley Drive Bridgeville, PA 15017 Dear Jimmi Sue: Re: U.

Mine Safety Disclosure

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

U.S. Silica Holdings, Inc. Executive Compensation Clawback Policy As Amended and Restated July 20, 2023

U.S. Silica Holdings, Inc. Executive Compensation Clawback Policy As Amended and Restated July 20, 2023 In the event of any required accounting restatement of the financial statements of U.S. Silica Holdings, Inc. (the “Company”) due to the material noncompliance of the Company with any financial reporting requirement under the applicable U.S. federal securities laws, including any required accoun

SLCA / U.S. Silica Holdings, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 11)* Name of issuer: US Silica Holdings Inc Title of Class of Securities: Common Stock CUSIP Number: 90346E103 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule pursuant to which this Schedule is file

SLCA / U.S. Silica Holdings, Inc. / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1 )* US Silica Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 90346E103 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 15, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

U.S. Silica Appoints Chief Accounting Officer

Exhibit 99.1 News Release U.S. Silica Appoints Chief Accounting Officer Katy, TX, December 15, 2023 – U.S. Silica Holdings, Inc. (NYSE: SLCA), a diversified industrial minerals company and the leading last-mile logistics provider to the oil and gas industry, today announced that it has appointed Gene Padgett as its Vice President, Chief Accounting Officer and Controller effective December 18, 2023

Welcome PATRICIA GIL VP, Investor Relations & Sustainability 2

Exhibit 99.1 VIRTUAL INVESTOR EVENT Industrial & Specialty Products Showcase DECEMBER 13, 2023 Welcome PATRICIA GIL VP, Investor Relations & Sustainability 2 VIRTUAL INVESTOR EVENT Forward Looking Statements This presentation includes “forward-looking statements” within the meaning of of competitors into our marketplace; changes in production spending by the federal securities laws - that is, stat

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 13, 2023 U.S. Silica Hol

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 13, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

Confidential Separation, Severance and General Release Agreement dated November 17, 2023 by and between Donald A. Merril, U.S. Silica Company and U.S. Silica Holdings, Inc.

EX-10.1 Exhibit 10.1 EMPLOYEE IS AFFIRMATIVELY ADVISED, INSTRUCTED, CAUTIONED AND RECOMMENDED TO CONSULT WITH AN ATTORNEY PRIOR TO THE EXECUTION OF THIS AGREEMENT. PLEASE READ CAREFULLY. THIS AGREEMENT CONTAINS A RELEASE OF ALL KNOWN AND UNKNOWN CLAIMS. DATE AGREEMENT FIRST DELIVERED TO EMPLOYEE: October 18, 2023 CONFIDENTIAL SEPARATION, SEVERANCE AND GENERAL RELEASE AGREEMENT This Confidential Se

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): November 17, 2023 U.S. Silica Hol

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): November 17, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registran

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

U.S. Silica Holdings, Inc. Reports Third Quarter 2023 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Reports Third Quarter 2023 Results •GAAP and adjusted EPS for the quarter of $0.34 and $0.38 per diluted share, respectively •Cash flow from operations of $76.7 million for the quarter •Balance sheet strengthened with additional $25 million of debt extinguished •Full year 2023 financial guidance reaffirmed Katy, Texas, November 3, 2023 – U.S. Si

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): November 3, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 20, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

U.S. Silica Appoints Interim Chief Financial Officer

Exhibit 99.1 News Release U.S. Silica Appoints Interim Chief Financial Officer Katy, TX, October 20, 2023 – U.S. Silica Holdings, Inc. (NYSE: SLCA), a diversified industrial minerals company and the leading last-mile logistics provider to the oil and gas industry, today announced that it has appointed Kevin Hough as interim Executive Vice President, Chief Financial Officer and Chief Accounting Off

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 10, 2023 U.S. Silica Holdi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 10, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commiss

Separation, Consulting and General Release Agreement dated August 10, 2023 by and between Michael L. Winkler, U.S Silica Company and U.S. Silica Holdings, Inc.

EX-10.1 Exhibit 10.1 EMPLOYEE IS AFFIRMATIVELY ADVISED, INSTRUCTED, CAUTIONED AND RECOMMENDED TO CONSULT WITH AN ATTORNEY PRIOR TO THE EXECUTION OF THIS AGREEMENT. PLEASE READ CAREFULLY. THIS AGREEMENT CONTAINS A RELEASE OF ALL KNOWN AND UNKNOWN CLAIMS. DATE AGREEMENT FIRST DELIVERED TO EMPLOYEE: August 10, 2023 SEPARATION, CONSULTING AND GENERAL RELEASE AGREEMENT This Separation, Consulting and G

U.S. Silica Appoints New Chief Operating Officer

EX-99.1 Exhibit 99.1 News Release U.S. Silica Appoints New Chief Operating Officer Katy, TX, August 11, 2023 – U.S. Silica Holdings, Inc. (NYSE: SLCA), a diversified industrial minerals company and the leading last-mile logistics provider to the oil and gas industry, today announced that it has appointed Jay Moreau as its Executive Vice President and Chief Operating Officer effective August 14, 20

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

U.S. Silica Holdings, Inc. Reports Second Quarter 2023 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Reports Second Quarter 2023 Results •Net income increased 4% sequentially •GAAP and adjusted EPS for the quarter of $0.59 and $0.60 per diluted share, respectively •Oil & Gas segment contribution margin increased 28% year-over-year, driven by increased sand prices and expanded transportation margins for SandBox •Industrial & Specialty Products s

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 27, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 12, 2023 U.S. Silica Holding

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 12, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

U.S. Silica Expands Board of Directors with Appointment of Jimmi Sue Smith

EX-99.1 Exhibit 99.1 News Release U.S. Silica Expands Board of Directors with Appointment of Jimmi Sue Smith Katy, TX, July 14, 2023 – U.S. Silica Holdings, Inc. (NYSE: SLCA) today announced that it has appointed Jimmi Sue Smith to its Board of Directors effective July 14, 2023. The election of Ms. Smith increases the size of the Company’s Board to eight members. Ms. Smith will also serve as an in

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): June 29, 2023 U.S. Silica Holding

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): June 29, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

U.S. Silica Expands Board of Directors with Appointment of Simon Bates

EX-99.1 Exhibit 99.1 News Release U.S. Silica Expands Board of Directors with Appointment of Simon Bates Katy, TX, June 30, 2023 – U.S. Silica Holdings, Inc. (NYSE: SLCA) today announced that it has appointed Simon Bates to its Board of Directors effective July 3, 2023. The election of Mr. Bates increases the size of the Company’s Board to seven members. Mr. Bates will also serve as an independent

Powers of Attorney (included on signature page hereto)

S-8 As filed with the Securities and Exchange Commission on May 19, 2023 Registration No.

Filing Fee Table

EX-FILING FEES Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) U.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 11, 2023 U.S. Silica Holdings

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 11, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

Fifth Amended and Restated U.S. Silica Holdings Inc. 2011 Incentive Compensation Plan, as amended and restated effective May 11, 2023.

EX-10.1 Exhibit 10.1 FIFTH AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN (As amended and restated effective May 11, 2023) ARTICLE I PURPOSE The purpose of this Fifth Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan is to enhance the profitability and value of the Company for the benefit of its stockholders by enabling the Company t

Fifth Amended and Restated U.S. Silica Holdings Inc. 2011 Incentive Compensation Plan, as amended and restated effective May 11, 2023 (marked to show changes against prior version).

EX-10.2 Exhibit 10.2 FIFTHFOURTH AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN (As amended and restated effective May 112, 20232) ARTICLE I PURPOSE The purpose of this FifthFourth Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan is to enhance the profitability and value of the Company for the benefit of its stockholders by enabling

Form of Performance Share Unit Agreement (Adjusted Cash Flow) Pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan

PERFORMANCE SHARE UNIT AGREEMENT (ADJUSTED CASH FLOW) PURSUANT TO THE AMENDED AND RESTATED U.

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

Form 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

Form of Performance Share Unit Agreement (Relative TSR) Pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan

PERFORMANCE SHARE UNIT AGREEMENT (RELATIVE TSR) PURSUANT TO THE AMENDED AND RESTATED U.

Form of Restricted Stock Unit Agreement Pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan

RESTRICTED STOCK UNIT AGREEMENT PURSUANT TO THE AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN * * * * * Participant: Grant Date: Number of Restricted Stock Units Granted: * * * * * THIS RESTRICTED STOCK UNIT AWARD AGREEMENT (this “Agreement”), dated as of the Grant Date specified above, is entered into by and between U.S. Silica Holdings, Inc., a corporation orga

U.S. Silica Holdings, Inc. Announces First Quarter 2023 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces First Quarter 2023 Results •GAAP and adjusted EPS for the quarter of $0.57 and $0.64 per diluted share, respectively •Revenue increased 7% sequentially due to strong customer demand and improved pricing •Net income increased 41% sequentially •Adjusted EBITDA increased 20% sequentially •Oil & Gas segment contribution margin increased 16

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 27, 2023 U.S. Silica Holdin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 27, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  )

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defi

Fourth Amended and Restated Credit Agreement, dated as of March 23, 2023, by and among USS Holdings, Inc., as guarantor, U.S. Silica Company, as borrower, certain of U.S. Silica Company’s subsidiaries as additional guarantors, the lenders named therein and BNP Paribas, as administrative agent for the lenders.

EX-10.1 Exhibit 10.1 Execution Version $1,100,000,000 FOURTH AMENDED AND RESTATED CREDIT AGREEMENT dated as of March 23, 2023 among USS HOLDINGS, INC., as Parent U.S. SILICA COMPANY, as Company THE SUBSIDIARY GUARANTORS LISTED HEREIN, as Subsidiary Guarantors THE LENDERS LISTED HEREIN, as Lenders and BNP PARIBAS, as Administrative Agent BNP PARIBAS SECURITIES CORP., MUFG BANK, LTD., TCBI SECURITIE

U.S. Silica Holdings, Inc. Completes Amendment and Restatement of $1.1 Billion Credit Agreement

EX-99.1 Exhibit 99.1 U.S. Silica Holdings, Inc. Completes Amendment and Restatement of $1.1 Billion Credit Agreement KATY, Texas, March 23, 2023 – U.S. Silica Holdings, Inc. (NYSE: SLCA), a diversified industrial minerals company and the leading last-mile logistics provider to the oil and gas industry, today announced that it has entered into a fourth amended and restated Credit Agreement of $1.1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): March 23, 2023 U.S. Silica Holdin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): March 23, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

Form 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K þ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as spec

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 24, 2023 U.S. Silica Hol

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 24, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

JOHN T. BOYD COMPANY

TECHNICAL REPORT SUMMARY PROPPANT SAND RESOURCES AND RESERVES LAMESA OPERATION Dawson County, Texas Prepared For U.

Name Jurisdiction of Formation Hourglass Acquisition I, LLC Delaware Preferred Rocks USS Inc. Delaware Hourglass Holdings, LLC Delaware USS Holdings, Inc. Delaware U.S. Silica Company Delaware Pennsylvania Glass Sand Corporation Delaware The Fulton L

Exhibit 21.1 Name Jurisdiction of Formation Hourglass Acquisition I, LLC Delaware Preferred Rocks USS Inc. Delaware Hourglass Holdings, LLC Delaware USS Holdings, Inc. Delaware U.S. Silica Company Delaware Pennsylvania Glass Sand Corporation Delaware The Fulton Land and Timber Company Pennsylvania Ottawa Silica Company Delaware Ottawa Silica Company, Ltd. Quebec, Canada Coated Sand Solutions, LLC

U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2022 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2022 Results •Fourth quarter revenue of $412.9 million and full year revenue of $1.5 billion •GAAP and adjusted EPS for the quarter of $0.40 and $0.43 per diluted share, respectively •Full year 2022 cash flow from operations of $262.7 million increased 55% year-over-year •Oil & Gas proppant volumes increase

JOHN T. BOYD COMPANY

TECHNICAL REPORT SUMMARY PROPPANT SAND RESOURCES AND RESERVES CRANE OPERATION Crane County, Texas Prepared For U.

JOHN T. BOYD COMPANY

TECHNICAL REPORT SUMMARY SILICA SAND RESOURCES AND RESERVES OTTAWA OPERATION LaSalle County, Illinois Prepared For U.

Mine Safety Disclosure

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

JOHN T. BOYD COMPANY

TECHNICAL REPORT SUMMARY DIATOMACEOUS EARTH RESOURCES AND RESERVES COLADO OPERATION Pershing County, Nevada Prepared For U.

SLCA / U.S. Silica Holdings Inc / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* US Silica Holdings Inc (Name of Issuer) Common Stock (Title of Class of Securities) 90346E103 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

SLCA / U.S. Silica Holdings Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: US Silica Holdings Inc. Title of Class of Securities: Common Stock CUSIP Number: 90346E103 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is fil

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): January 20, 2023 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registran

Mine Safety Disclosure.

EX-95.1 6 slca-20220930xex951.htm EX-95.1 Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 28, 2022 U.S. Silica Hold

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 28, 2022 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

U.S. Silica Holdings, Inc. Announces Third Quarter 2022 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Third Quarter 2022 Results •GAAP and adjusted EPS for the quarter of $0.41 and $0.43 per diluted share, respectively •Revenue increased 8% sequentially due to strong customer demand and improved pricing •Adjusted EBITDA increased 10% sequentially •Oil & Gas segment contribution margin increased 10% sequentially •Industrial & Specialty

Technical Report Summary, Colado Site, Pershing County, Nevada

Exhibit 96.2 Colado, Pershing County, Nevada Technical Report Summary December 31, 2021 Amended as of September 30, 2022 TECHNICAL REPORT SUMMARY COLADO SITE LOVELOCK, PERSHING COUNTY, NEVADA Submitted to: U.S. Silica Holdings, Inc. Prepared By: Boerne, Texas 830-249-8284 Date: September 30, 2022 Project No. 10711-025-013 -ML- 1 Colado, Pershing County, Nevada Technical Report Summary December 31,

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2021 OR ☐ TRANSITION R

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A (Amendment No. 1) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings,

* * *

CORRESP 1 filename1.htm 2100 L STREET, NW SUITE 900 WASHINGTON DC 20037 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP AUSTIN, BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, MIAMI, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C. October 21, 2022 Writer’s Direct Contact +1 (202) 887-1585 SL

Technical Report Summary, Ottawa Site, LaSalle County, Illinois

Ottawa, Lasalle County, Illinois Exhibit 96.1 Technical Report Summary Effective Date: December 31, 2021 Amended as of September 30, 2022 TECHNICAL REPORT SUMMARY OTTAWA SITE OTTAWA, LASALLE COUNTY, ILLINOIS Submitted to: U.S. Silica Holdings, Inc. Prepared By: Boerne, Texas 830-249-8284 Date: September 30, 2022 Project No. 10711-025-013 -ML- Ottawa, Lasalle County, Illinois Technical Report Summa

Technical Report Summary, Lamesa Site, Dawson County, Texas

Exhibit 96.3 Lamesa, Dawson County, Texas Technical Report Summary December 31, 2021 Amended as of September 30, 2022 TECHNICAL REPORT SUMMARY LAMESA SITE LAMESA, DAWSON COUNTY, TEXAS Submitted to: U.S. Silica Holdings, Inc. Prepared By: Boerne, Texas 830-249-8284 Date: September 30, 2022 Project No. 10711-025-013 -ML- Lamesa, Dawson County, Texas Technical Report Summary December 31, 2021 Amended

2100 L STREET, NW

CORRESP 1 filename1.htm 2100 L STREET, NW SUITE 900 WASHINGTON DC 20037 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP AUSTIN, BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C. October 3, 2022 VIA EDGAR John Coleman United States Securities and

* * *

2100 L STREET, NW SUITE 900 WASHINGTON DC 20037 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP AUSTIN, BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C. September 2, 2022 VIA EDGAR John Coleman United States Securities and Exchange Commission Di

2100 L STREET, NW

2100 L STREET, NW SUITE 900 WASHINGTON DC 20037 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP AUSTIN, BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES , NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D. C. August 26, 2022 VIA EDGAR John Coleman United States Securities and Exchange Commission Di

2100 L STREET, NW

2100 L STREET, NW SUITE 900 WASHINGTON DC 20037 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP AUSTIN, BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C. August 9, 2022 VIA EDGAR John Coleman United States Securities and Exchange Commission Divis

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 29, 2022 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

U.S. Silica Holdings, Inc. Announces Second Quarter 2022 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Second Quarter 2022 Results ?GAAP and adjusted EPS for the quarter of $0.29 and $0.32 per diluted share, respectively ?Revenue increased 27% sequentially due to strong customer demand ?Adjusted EBITDA increased 77% sequentially ?Oil & Gas segment contribution margin increased 73% sequentially ?Industrial & Specialty Products segment co

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the ?Act?) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

* * *

2100 L STREET, NW SUITE 900 WASHINGTON DC 20037 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP AUSTIN, BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C. June 24, 2022 VIA EDGAR John Coleman United States Securities and Exchange Commission Divisi

2100 L STREET, NW

2100 L STREET, NW SUITE 900 WASHINGTON DC 20037 TELEPHONE:202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP AUSTIN, BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C. June 6, 2022 VIA EDGAR John Coleman United States Securities and Exchange Commission Division

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table Form S-8 (Form Type) U.S. Silica Holdings, Inc. (Exact Name of Registrant as Specified in its Charter) Table 1?Newly Registered Securities Title of each Class of Securities to be Registered Amount to be Registered (1) Proposed Maximum Offering Price Per Share Fee Calculation Rule Proposed Maximum Aggregate Offering Price Fee Rate Amount of Registration F

As filed with the Securities and Exchange Commission on May 20, 2022

As filed with the Securities and Exchange Commission on May 20, 2022 Registration No.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 12, 2022 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

Fourth Amended and Restated U.S. Silica Holdings Inc. 2011 Incentive Compensation Plan, as amended and restated effective May 12, 2022.

Exhibit 10.1 FOURTH AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN (As amended and restated effective May 12, 2022) ARTICLE I PURPOSE The purpose of this Fourth Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan is to enhance the profitability and value of the Company for the benefit of its stockholders by enabling the Company to offe

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the ?Act?) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

U.S. Silica Holdings, Inc. Announces First Quarter 2022 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces First Quarter 2022 Results ?Loss for the quarter of $0.11 per basic and diluted share and adjusted loss of $0.02 per basic and diluted share ?Revenue increased 7% sequentially due to strong customer demand ?Adjusted EBITDA increased 26% sequentially ?Oil & Gas segment contribution margin increased 49% sequentially Katy, Texas, April 29

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

Form of Performance Share Unit Agreement (Adjusted Cash Flow) Pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan

PERFORMANCE SHARE UNIT AGREEMENT (ADJUSTED CASH FLOW) PURSUANT TO THE AMENDED AND RESTATED U.

Form of Performance Share Unit Agreement (Relative TSR) Pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan

PERFORMANCE SHARE UNIT AGREEMENT (RELATIVE TSR) PURSUANT TO THE AMENDED AND RESTATED U.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 29, 2022 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

Form of Restricted Stock Unit Agreement Pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan

RESTRICTED STOCK UNIT AGREEMENT PURSUANT TO THE AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN * * * * * Participant: Grant Date: Number of Restricted Stock Units Granted: * * * * * THIS RESTRICTED STOCK UNIT AWARD AGREEMENT (this ?Agreement?), dated as of the Grant Date specified above, is entered into by and between U.S. Silica Holdings, Inc., a corporation orga

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  )

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.? ) Filed by the Registrant ? ? ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, For Use of the Commission Only (as permitted by Ru

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.  )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.? ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defi

Third Amended and Restated U.S. Silica Holdings Inc. 2011 Incentive Compensation Plan, as amended and restated effective May 13, 2021.

Exhibit 10.1 THIRD AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN (As amended and restated effective May 13, 2021) ARTICLE I PURPOSE The purpose of this Third Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan is to enhance the profitability and value of the Company for the benefit of its stockholders by enabling the Company to offer

Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A (Amendment No. 1) CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 13, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26

Technical Report Summary Colado, Pershing County, Nevada December 31, 2021 TECHNICAL REPORT SUMMARY COLADO SITE LOVELOCK, PERSHING COUNTY, NEVADA Submitted to: U.S. Silica Holdings, Inc. Prepared By: Boerne, Texas 830-249-8284 Date: February 11, 2022

Technical Report Summary Colado, Pershing County, Nevada December 31, 2021 TECHNICAL REPORT SUMMARY COLADO SITE LOVELOCK, PERSHING COUNTY, NEVADA Submitted to: U.

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the ?Act?) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

CONSENT OF THIRD-PARTY QUALIFIED PERSON

Q4 Impact Group, LLC 8050 Freedom Ave. NW North Canton, Ohio 44720 CONSENT OF THIRD-PARTY QUALIFIED PERSON Q4 Impact Group, LLC (?Q4?), in connection with the annual report on Form 10-K and any amendments or supplements and/or exhibits thereto (collectively, the Form 10-K), consent to: ?the filing and use of the technical report summary titled ?Technical Report Summary, Lamesa Site, Dawson County,

CONSENT OF THIRD-PARTY QUALIFIED PERSON

Q4 Impact Group, LLC 8050 Freedom Ave. NW North Canton, Ohio 44720 CONSENT OF THIRD-PARTY QUALIFIED PERSON Q4 Impact Group, LLC (?Q4?), in connection with the annual report on Form 10-K and any amendments or supplements and/or exhibits thereto (collectively, the Form 10-K), consent to: ?the filing and use of the technical report summary titled ?Technical Report Summary, Ottawa Site, Lasalle County

Technical Report Summary Ottawa, Lasalle County, Illinois Effective Date: December 31, 2021 TECHNICAL REPORT SUMMARY OTTAWA SITE OTTAWA, LASALLE COUNTY, ILLINOIS Submitted to: U.S. Silica Holdings, Inc. Prepared By: Boerne, Texas 830-249-8284 Effecti

Technical Report Summary Ottawa, Lasalle County, Illinois Effective Date: December 31, 2021 TECHNICAL REPORT SUMMARY OTTAWA SITE OTTAWA, LASALLE COUNTY, ILLINOIS Submitted to: U.

Letter Agreement, effective September 21, 2021, by and between Sandra Rogers and U.S. Silica Holdings, Inc.

September 20, 2021 Sandra Rogers 4422 N. 75th St. Unit 2005 Scottsdale, AZ 85251 Dear Sandra: Re: U.S. Silica Board of Directors On behalf of U.S. Silica Holdings, Inc. (the ?Company?), I am pleased to invite you to become a member of the Company?s Board of Directors (the ?Board?), effective October 1, 2021. We believe that your skills, expertise and knowledge will prove very helpful to the Compan

Technical Report Summary Lamesa, Dawson County, Texas December 31, 2021 TECHNICAL REPORT SUMMARY LAMESA SITE LAMESA, DAWSON COUNTY, TEXAS Submitted to: U.S. Silica Holdings, Inc. Prepared By: Boerne, Texas 830-249-8284 Date: February 11, 2022 Project

Technical Report Summary Lamesa, Dawson County, Texas December 31, 2021 TECHNICAL REPORT SUMMARY LAMESA SITE LAMESA, DAWSON COUNTY, TEXAS Submitted to: U.

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 25, 2022 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

List of subsidiaries of U.S. Silica Holdings, Inc.

Exhibit 21.1 Name Jurisdiction of Formation Hourglass Acquisition I, LLC Delaware Preferred Rocks USS Inc. Delaware Hourglass Holdings, LLC Delaware USS Holdings, Inc. Delaware U.S. Silica Company Delaware Pennsylvania Glass Sand Corporation Delaware The Fulton Land and Timber Company Pennsylvania Ottawa Silica Company Delaware Ottawa Silica Company, Ltd. Quebec, Canada Coated Sand Solutions, LLC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as spec

U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2021 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2021 Results ?Fourth quarter revenue of $284.9 million and full year revenue of $1.1 billion ?Loss for the quarter of $0.25 per basic and diluted share and adjusted loss of $0.22 per basic and diluted share ?Adjusted EBITDA increased 6% sequentially ?Industrial and Specialty Products segment volumes increas

SLCA / U.S. Silica Holdings Inc / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: US Silica Holdings Inc. Title of Class of Securities: Common Stock CUSIP Number: 90346E103 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is file

U.S. Silica Holdings, Inc. Announces Third Quarter 2021 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Third Quarter 2021 Results ?Cash flows generated from operating activities were $74.8 million in the quarter ?Third quarter revenue totaled $267.3 million, flat sequentially (excluding the prior quarter customer settlement) and increased 51% compared to the prior year ?GAAP and adjusted EPS for the quarter of $(0.27) and $(0.22) per di

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 29, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the ?Act?) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registran

Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 6, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commiss

U.S. Silica Holdings, Inc. to Explore Strategic Alternatives for Industrial & Specialty Products (ISP) Segment

Exhibit 99.1 U.S. Silica Holdings, Inc. to Explore Strategic Alternatives for Industrial & Specialty Products (ISP) Segment KATY, Texas, October 6, 2021 ? U.S. Silica Holdings, Inc. (NYSE: SLCA), a diversified global performance materials company and a leading producer of high value minerals and specialty products used in a variety of industrial applications and the leading proppant and last-mile

U.S. Silica Expands Board of Directors with Appointment of Sandra Rogers

Exhibit 99.1 News Release U.S. Silica Expands Board of Directors with Appointment of Sandra Rogers Katy, TX, October 1, 2021 ? U.S. Silica Holdings, Inc. (NYSE: SLCA) today announced that it has appointed Sandra Rogers to its Board of Directors. The election of Ms. Rogers increases the size of the Company's Board to six members. Ms. Rogers will also serve as an independent member of the Audit and

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 1, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commiss

As filed with the Securities and Exchange Commission on July 30, 2021

Table of Contents As filed with the Securities and Exchange Commission on July 30, 2021 Registration No.

Form T-1 Statement of Eligibility of Trustee under the Trust Indenture Act of 1939

EX-25.1 5 d155857dex251.htm EX-25.1 Exhibit 25.1 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b) (2) WELLS FARGO BANK, NATIONAL ASSOCIATION (Exact name of trustee as specified in it

Power of Attorney

EX-24.1 4 d155857dex241.htm EX-24.1 Exhibit 24.1 Power of Attorney Each of the undersigned, being a director or officer, or both, of U.S. Silica Holdings, Inc., a Delaware corporation (the “Company”), hereby constitutes and appoints Stacy Russell and Matthew C. Rinegar, and each of them, his or her true and lawful attorney-in-fact and agent, with full and several power of substitution, resubstitut

U.S. Silica Holdings, Inc. Announces Second Quarter 2021 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Second Quarter 2021 Results ?Settled customer dispute and received $128 million of consideration, including $90 million in cash ?Second quarter revenue totaled $317.3 million ?GAAP and adjusted EPS for the quarter of $0.34 and ($0.12) per diluted share, respectively ?Overall volumes increased 15% sequentially with growth in both Indust

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 29, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the ?Act?) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): June 28, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 26, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

Mine Safety - Reporting of Shutdowns and Patterns of Violations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 19, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

As filed with the Securities and Exchange Commission on May 21, 2021

As filed with the Securities and Exchange Commission on May 21, 2021 Registration No.

Third Amended and Restated U.S. Silica Holdings Inc. 2011 Incentive Compensation Plan, as amended and restated effective May 13, 2021

THIRD AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN (As amended and restated effective May 13, 2021) ARTICLE I PURPOSE The purpose of this Third Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan is to enhance the profitability and value of the Company for the benefit of its stockholders by enabling the Company to offer Eligible Indi

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 13, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

Form of Performance Share Unit Agreement (Relative TSR) Pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan

PERFORMANCE SHARE UNIT AGREEMENT (RELATIVE TSR) PURSUANT TO THE AMENDED AND RESTATED U.

U.S. Silica Holdings, Inc. Announces First Quarter 2021 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces First Quarter 2021 Results •First quarter revenue of $234.4 million •GAAP EPS loss for the quarter of $(0.28) per basic and diluted share and adjusted EPS loss of $(0.27) per basic and diluted share •Overall volumes increased 26% sequentially with growth in both Industrial & Specialty Products and Oil & Gas Segments Katy, Texas, April

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2021 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the ?Act?) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): April 30, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

Schedule 14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.? ) Filed by the Registrant ? ? ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, For Use of the Commission Only (as permitted by Ru

U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2020 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2020 Results ?Fourth quarter revenue of $227.3 million and full year revenue of $845.9 million ?GAAP EPS earnings for the quarter of $0.06 per basic and diluted share and adjusted EPS loss of ($0.26) per basic and diluted share ?Industrial and Specialty Products segment volumes increased 10% versus fourth q

Name Jurisdiction of Formation Hourglass Acquisition I, LLC Delaware Preferred Rocks USS Inc. Delaware Hourglass Holdings, LLC Delaware USS Holdings, Inc. Delaware U.S. Silica Company Delaware Pennsylvania Glass Sand Corporation Delaware The Fulton L

Exhibit 21.1 Name Jurisdiction of Formation Hourglass Acquisition I, LLC Delaware Preferred Rocks USS Inc. Delaware Hourglass Holdings, LLC Delaware USS Holdings, Inc. Delaware U.S. Silica Company Delaware Pennsylvania Glass Sand Corporation Delaware The Fulton Land and Timber Company Pennsylvania Ottawa Silica Company Delaware Ottawa Silica Company, Ltd. Quebec, Canada Coated Sand Solutions, LLC

Mine Safety Disclosure

EX-95.1 8 slca-201231xexhibit951.htm EX-95.1 Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regula

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 26, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ? ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2020 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as spec

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 9, 2021 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

U.S. Silica Holdings, Inc.

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 2)* U.S. Silica Holdings, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 90346E103 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to wh

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: US Silica Holdings Inc. Title of Class of Securities: Common Stock CUSIP Number: 90346E103 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is file

Regulation FD Disclosure - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 8, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

U.S. Silica Holdings, Inc. Announces Third Quarter 2020 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Third Quarter 2020 Results •Third quarter revenue of $176.5 million •GAAP and adjusted EPS for the quarter of $(0.19) and $(0.15) per share, respectively •Industrial & Specialty Products segment delivered 21% sequential growth in both volumes and profits •Oil & Gas segment experienced 15% sequential increase in proppant volumes, 74% in

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registran

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 29, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

Separation, Severance and General Release Agreement entered into by and between Bradford B. Casper and U.S. Silica Company effective August 31, 2020

Certain information indicated with [****] in this document has been omitted from this exhibit because it is both (i) not material and (ii) would be competitively harmful if publicly disclosed.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): August 7, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissi

U.S. Silica Holdings, Inc. Announces Resignation of Brad Casper

EX-99.1 Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Resignation of Brad Casper Katy, Texas, August 7, 2020 – U.S. Silica Holdings, Inc. (NYSE: SLCA) (the “Company”) today announced that Brad Casper has resigned from his position as the Company’s President to pursue other opportunities effective August 31, 2020. “Brad joined us nine years ago and has been an integral part of grow

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 31, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

U.S. Silica Holdings, Inc. Announces Second Quarter 2020 Results

EX-99.1 2 ex991slca20200630.htm EX-99.1 Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Second Quarter 2020 Results •Second quarter revenue of $172.5 million •GAAP and adjusted EPS for the quarter of $(0.44) and $(0.09) per share, respectively •Continued right-sizing Oil & Gas segment structure through supply chain optimization •Targeting over $40 million in cost reductions, up from

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

Second Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan

Exhibit 10.1 RESTRICTED STOCK UNIT AGREEMENT PURSUANT TO THE AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN * * * * * Participant: Grant Date: Number of Restricted Stock Units Granted: * * * * * THIS RESTRICTED STOCK UNIT AWARD AGREEMENT (this “Agreement”), dated as of the Grant Date specified above, is entered into by and between U.S. Silica Holdings, Inc., a cor

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K/A Amendment No. 1 CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 7, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-37

-

CORRESP FOIA CONFIDENTIAL TREATMENT REQUESTED BY U.S. SILICA HOLDINGS, INC. PURSUANT TO 17 C.F.R §200.83 U.S. Silica Holdings, Inc. 24275 Katy Freeway, Suite 600 Katy, Texas 77494 July 17, 2020 Via EDGAR Transmission Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549-4628 Attn: Division of Corporation Finance Office of Energy & Transportati

-

CORRESP 2000 PENNSYLVANIA AVE., NW WASHINGTON, D.C. 20006-1888 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, NORTHERN VIRGINIA, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C. July 1, 2020 Via EDGAR Transmission Securities and Exchange Commis

-

CORRESP 2000 PENNSYLVANIA AVE., NW WASHINGTON, D.C. 20006-1888 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, NORTHERN VIRGINIA, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C. June 15, 2020 Via EDGAR Transmission Securities and Exchange Commi

- S-8

S-8 As filed with the Securities and Exchange Commission on May 12, 2020 Registration No.

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 8, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

U.S. Silica Announces Suspension of Quarterly Dividend

News Release U.S. Silica Announces Suspension of Quarterly Dividend KATY, Texas, May 8, 2020 - U.S. Silica Holdings, Inc. (NYSE: SLCA) ("U.S. Silica" or the "Company") today announced that its Board of Directors has elected to suspend the Company’s quarterly cash dividend of $0.02 per common share until further notice. U.S. Silica took this action as part of the Company’s strategy to preserve capi

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 7, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

10.1 Second Amended and Restated U.S. Silica Holdings Inc. 2011 Incentive Compensation Plan, as amended and restated effective February 1, 2020.

Exhibit 10.1 SECOND AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN (As amended and restated effective February 1, 2020) ARTICLE I PURPOSE The purpose of this Second Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan is to enhance the profitability and value of the Company for the benefit of its stockholders by enabling the Company to

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended March 31, 2020 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as

Form of Restricted Stock Unit Agreement, pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan.

Exhibit 10.2 U.S. SILICA HOLDINGS, INC. CHANGE IN CONTROL SEVERANCE PLAN INTRODUCTION The purpose of this U.S. Silica Holdings, Inc. Change in Control Severance Plan (the “Plan”) is to enable the Employer to offer certain protections to a select group of management or highly compensated employees who are employed by the Employer immediately prior to a Change in Control if such employee’s employmen

Mine Safety Disclosure.

EX-95.1 8 slca-20200331xex951.htm EXHIBIT 95.1 Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regu

Form of Restricted Stock Unit Agreement, pursuant to the Amended and Restated U.S. Silica Holdings, Inc. 2011 Incentive Compensation Plan.

Exhibit 10.1 RESTRICTED STOCK UNIT AGREEMENT PURSUANT TO THE AMENDED AND RESTATED U.S. SILICA HOLDINGS, INC. 2011 INCENTIVE COMPENSATION PLAN * * * * * Participant: Grant Date: Number of Restricted Stock Units Granted: * * * * * THIS RESTRICTED STOCK UNIT AWARD AGREEMENT (this “Agreement”), dated as of the Grant Date specified above, is entered into by and between U.S. Silica Holdings, Inc., a cor

U.S. Silica Holdings, Inc. Announces First Quarter 2020 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces First Quarter 2020 Results • First quarter revenue of $269.6 million • GAAP and adjusted EPS for the quarter of $(0.98) and $(0.03) per share, respectively • Right-sized Oil & Gas segment structure through comprehensive cost reduction measures and continued optimization of manufacturing and transload network • Industrial & Specialty Pr

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): May 1, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commission

- DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No.

SLCA / U.S. Silica Holdings, Inc. DEF 14A - - DEF 14A

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant o Check the appropriate box: o Preliminary Proxy Statement o Confidential, For Use of the Commission Only (as permitted by Rule 14

SLCA / U.S. Silica Holdings, Inc. DEFA14A - - DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, For Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): February 25, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Fiscal Year Ended December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as spec

Name Jurisdiction of Formation Hourglass Acquisition I, LLC Delaware Preferred Rocks USS Inc. Delaware Hourglass Holdings, LLC Delaware USS Holdings, Inc. Delaware U.S. Silica Company Delaware Pennsylvania Glass Sand Corporation Delaware The Fulton L

Exhibit 21.1 Name Jurisdiction of Formation Hourglass Acquisition I, LLC Delaware Preferred Rocks USS Inc. Delaware Hourglass Holdings, LLC Delaware USS Holdings, Inc. Delaware U.S. Silica Company Delaware Pennsylvania Glass Sand Corporation Delaware The Fulton Land and Timber Company Pennsylvania Ottawa Silica Company Delaware Ottawa Silica Company, Ltd. Quebec, Canada Coated Sand Solutions, LLC

CONSENT OF RYSTAD ENERGY.

Exhibit 99.1 CONSENT OF RYSTAD ENERGY. We hereby consent to the references to our company’s name in the Annual Report on Form 10-K for the Year Ended December 31, 2019 (the “Annual Report”) of U.S. Silica Holdings, Inc. (the “Company”) and the quotation by the Company of our Proppant Market report - 1Q 2020, published on December 10, 2019. We also hereby consent to the filing of this letter as an

24275 Katy Freeway, Suite 600, Katy, YX 77494 phone (281) 258-2170 web www.ussilica.com

June 29, 2019 Bonnie C. Lind 1020 Bay Pointe Crossing Alpharetta, GA 30005 Dear Bonnie: Re: U.S. Silica Board of Directors On behalf of U.S. Silica Holdings, Inc. (the “Company”), I am pleased to invite you to become a member of the Company’s Board of Directors (the “Board”). We believe that your skills, expertise and knowledge will prove very helpful to the Company and our stockholders as we stri

Mine Safety Disclosure

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Exchange Act

DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 We have one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): our common stock, par value $0.

U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2019 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Fourth Quarter and Full Year 2019 Results • Fourth quarter revenue of $339.1 million and full year revenue of $1.47 billion • GAAP EPS loss for the quarter of $3.99 per share and adjusted EPS loss of $0.53 per share • Double digit growth in annual revenue and profitability for the Industrial and Specialty Products segment • Annual Sand

SLCA / U.S. Silica Holdings, Inc. / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* US SILICA HOLDINGS INC (Name of Issuer) Common Stock (Title of Class of Securities) 90346E103 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this

SLCA / U.S. Silica Holdings, Inc. / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: US Silica Holdings Inc Title of Class of Securities: Common Stock CUSIP Number: 90346E103 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed

SLCA / U.S. Silica Holdings, Inc. / Senvest Management, LLC - U.S. SILICA HOLDINGS, INC. Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* U.S. Silica Holdings, Inc. (Name of Issuer) Common Stock, $0.01 par value (Title of Class of Securities) 90346E103 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to wh

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): January 10, 2020 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): December 10, 2019 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): November 13, 2019 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

Form T-1 Statement of Eligibility of Trustee under the Trust Indenture Act of 1939

EX-25.1 Exhibit 25.1 SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM T-1 STATEMENT OF ELIGIBILITY UNDER THE TRUST INDENTURE ACT OF 1939 OF A CORPORATION DESIGNATED TO ACT AS TRUSTEE ☐ CHECK IF AN APPLICATION TO DETERMINE ELIGIBILITY OF A TRUSTEE PURSUANT TO SECTION 305(b)(2) WELLS FARGO BANK, NATIONAL ASSOCIATION (Exact name of trustee as specified in its charter) A National Banking

SLCA / U.S. Silica Holdings, Inc. S-3ASR - - S-3ASR

S-3ASR Table of Contents As filed with the Securities and Exchange Commission on November 1, 2019 Registration No.

Power of Attorney

EX-24.1 Exhibit 24.1 Power of Attorney Each of the undersigned, being a director or officer, or both, of U.S. Silica Holdings, Inc., a Delaware corporation (the “Company”), hereby constitutes and appoints W. Andrew Macan or Matthew C. Rinegar, and each of them, his or her true and lawful attorney-in-fact and agent, with full and several power of substitution, resubstitution and revocation and to a

Form of Debt Security (included in Exhibit 4.1)

EX-4.1 Exhibit 4.1 U.S. SILICA HOLDINGS, INC., as issuer of the Notes (hereinafter referred to as the Company) and WELLS FARGO BANK, NATIONAL ASSOCIATION, as Trustee INDENTURE Dated as of [ ], 20[ ] DEBT SECURITIES CROSS-REFERENCE TABLE Certain Sections of this Indenture relating to Sections 310 through 318, inclusive, of the Trust Indenture Act of 1939, as amended: Trust Indenture Act Section Ind

Consent and Amendment Agreement, dated as of August 23, 2019, among U.S. Silica Company and BNP Paribas, as administrative agent and the lenders named therein, amending that certain Third Amended and Restated Credit Agreement, dated as of May 1, 2018.

CERTAIN INFORMATION HAS BEEN EXCLUDED FROM THIS EXHIBIT BECAUSE IT IS NOT MATERIAL AND WOULD BE COMPETITIVELY HARMFUL IF PUBLICLY DISCLOSED Information excluded from this exhibit is marked with [ *** ] Exhibit 10.

Mine Safety Disclosure.

Exhibit 95.1 Mine Safety Disclosure The following disclosures are provided pursuant to the Dodd-Frank Wall Street Reform and Consumer Protection Act (the “Act”) and Item 104 of Regulation S-K, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended September 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registran

Consent of Rystad Energy.

Exhibit 99.1 CONSENT OF RYSTAD ENERGY. We hereby consent to the references to our company’s name in the Quarterly Report on Form 10-Q for the Quarterly Period Ended September 30, 2019 (the “Quarterly Report”) of U.S. Silica Holdings, Inc. (the “Company”) and the quotation by the Company of our "ShaleIntel Proppant Market - 4Q 2019," published on September 16, 2019. We also hereby consent to the fi

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): October 29, 2019 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commis

U.S. Silica Holdings, Inc. Announces Third Quarter 2019 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Third Quarter 2019 Results • Third quarter revenue of $361.8 million • GAAP and adjusted EPS for the quarter of $(0.31) and $(0.17) per share, respectively • Continued focus on rationalization of the frac sand business • Ongoing pursuit of organic growth opportunities in new higher margin Industrial & Specialty Products end markets Kat

SLCA / U.S. Silica Holdings, Inc. CORRESP - -

CORRESP U.S. Silica Holdings, Inc. 24275 Katy Freeway, Suite 600 Katy, Texas 77494 September 27, 2019 Via EDGAR Transmission Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, D.C. 20549-4628 Attn: Division of Corporation Finance Office of Beverages, Apparel and Mining Re: U.S. Silica Holdings, Inc. Form 10-K for the Year Ended December 31, 2018 Filed

SLCA / U.S. Silica Holdings, Inc. CORRESP - -

CORRESP 2000 PENNSYLVANIA AVE., NW WASHINGTON, D.C. 20006-1888 TELEPHONE: 202.887.1500 FACSIMILE: 202.887.0763 WWW.MOFO.COM MORRISON & FOERSTER LLP BEIJING, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, NEW YORK, NORTHERN VIRGINIA, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C September 17, 2019 Via EDGAR Transmission Securities and Exchange C

Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): September 4, 2019 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commi

Mine Safety - Reporting of Shutdowns and Patterns of Violations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): June 27, 2019 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

U.S. Silica Holdings, Inc. Announces Second Quarter 2019 Results

Exhibit 99.1 News Release U.S. Silica Holdings, Inc. Announces Second Quarter 2019 Results • Second quarter revenue of $394.9 million • GAAP and adjusted EPS for the quarter of $0.08 and $0.14 per share, respectively • Industrial and Specialty Products business delivers record profits • Continued growth in SandBox, the industry-leading last-mile logistics solution • Expectations for continued stro

Financial Statements and Exhibits, Results of Operations and Financial Condition

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (date of earliest event reported): July 30, 2019 U.S. Silica Holdings, Inc. (Exact name of registrant as specified in its charter) Delaware (State or other jurisdiction of incorporation) 001-35416 26-3718801 (Commissio

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the Quarterly Period Ended June 30, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission file number 001-35416 U.S. Silica Holdings, Inc. (Exact name of registrant as