ECOL / US Ecology Inc. - SEC फाइलिंग, वार्षिक रिपोर्ट, प्रॉक्सी स्टेटमेंट

यूएस इकोलॉजी इंक.
US ˙ NASDAQ ˙ US91732J1025
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CIK 1783400
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to US Ecology Inc.
SEC Filings (Chronological Order)
यह पृष्ठ SEC फाइलिंग की एक पूरी, कालानुक्रमिक सूची प्रदान करता है, ओनरशिप फाइलिंग को छोड़कर, जो हम अन्यत्र प्रदान करते हैं।
May 12, 2022 15-12B

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

15-12B 1 tm227737d61512b.htm 15-12B 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 001-39120 US ECOLOGY, INC. (Exact name o

May 2, 2022 EX-3.1

Amended and Restated Certificate of Incorporation of the Company

Exhibit 3.1 AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF US ECOLOGY, INC. FIRST: The name of the corporation is US Ecology, Inc. (the "Corporation"). SECOND: The address of its registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, City of Wilmington, County of New Castle, Delaware 19801. The name of its registered agent at such address is The Corporati

May 2, 2022 S-8 POS

As filed with the Securities and Exchange Commission on May 2, 2022

As filed with the Securities and Exchange Commission on May 2, 2022 Registration No.

May 2, 2022 S-8 POS

As filed with the Securities and Exchange Commission on May 2, 2022

S-8 POS 1 a22-141691s8pos.htm S-8 POS As filed with the Securities and Exchange Commission on May 2, 2022 Registration No. 333-261704 Registration No. 333-234424 Registration No. 333-235835 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-261704 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION S

May 2, 2022 8-K

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, Termination of 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, Financial Statements and Exhibits, 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): May 2, 2022 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or other jurisdiction of incorporation) (Commission File Numbe

May 2, 2022 EX-3.2

Amended and Restated Bylaws of the Company

Exhibit 3.2 BYLAWS OF US ECOLOGY, INC. * * * * * Article 1 Offices Section 1.01. Registered Office. The registered office of the Corporation shall be in the City of Wilmington, County of New Castle, State of Delaware. Section 1.02. Other Offices. The Corporation may also have offices at such other places both within and without the State of Delaware as the Board of Directors may from time to time

May 2, 2022 EX-4.1

Amendment to Warrant Agreement, dated as of May 2, 2022, by and between the Company and American Stock Transfer & Trust Company, LLC

Exhibit 4.1 AMENDMENT NO. 1 TO WARRANT AGREEMENT THIS AMENDMENT NO. 1 TO WARRANT AGREEMENT, dated as of May 2, 2022 (this ?Amendment?), by and US Ecology, Inc. (f/k/a US Ecology Parent, Inc.), a Delaware corporation (the ?Company?), and American Stock Transfer & Trust Company, LLC, as the warrant agent (the ?Warrant Agent?). Defined terms used herein and not otherwise defined shall have the meanin

May 2, 2022 S-8 POS

As filed with the Securities and Exchange Commission on May 2, 2022

As filed with the Securities and Exchange Commission on May 2, 2022 Registration No.

April 29, 2022 10-Q

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

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

April 29, 2022 EX-15

Letter re: Unaudited Interim Financial Statements

EXHIBIT 15 April 29, 2022 ? The Board of Directors and Stockholders of US Ecology, Inc.

April 26, 2022 8-K

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): April 26, 2022 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or other jurisdiction of incorporation) (Commission File Nu

April 15, 2022 8-K

Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 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 15, 2022 US ECOLOGY, INC.

April 15, 2022 10-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A Amendment No.1

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K/A Amendment No.1 x 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 For the transition period from to . Commission file number: 001-39120 US ECO

March 31, 2022 8-K

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): March 31, 2022 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Nu

March 31, 2022 EX-99.1

Republic Services and US Ecology Announce Expiration of Hart-Scott-Rodino Waiting Period for the Acquisition of US Ecology

Exhibit 99.1 Republic Services and US Ecology Announce Expiration of Hart-Scott-Rodino Waiting Period for the Acquisition of US Ecology PHOENIX and BOISE, Idaho (March 31, 2022) ? Republic Services, Inc. (NYSE: RSG) and US Ecology, Inc. (NASDAQ-GS: ECOL) announced today that the waiting period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, as amended, which applies to the proposed

March 29, 2022 DEFM14A

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

DEFM14A 1 tm227737-4defm14a.htm TABLE OF CONTENTS 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 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 permitt

March 11, 2022 EX-FILING FEES

Calculation of Filing Fee Tables SCHEDULE 14A (Form Type) US ECOLOGY, INC. (Exact Name of Registrant as Specified in its Charter) Table 1: Transaction Valuation

EX-FILING FEES Calculation of Filing Fee Tables SCHEDULE 14A (Form Type) US ECOLOGY, INC.

March 11, 2022 PREM14A

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

PREM14A 1 tm227737-2defm14a.htm PREM14A TABLE OF CONTENTS 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 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

March 8, 2022 SC 13G/A

ECOL / US Ecology Inc / Clarkston Capital Partners, LLC - SC 13G/A#1 - US ECOLOGY, INC. AND CCP Passive Investment

Page 1 of 13 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G/A Under the Securities Exchange Act of 1934 (Amendment No. 1)* US Ecology, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 91734M103 (CUSIP Number) February 28, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to wh

February 28, 2022 EX-4.2

Description of Securities

Exhibit 4.2 DESCRIPTION OF THE COMPANY?S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED As of December 31, 2021, US Ecology, Inc. (?we,? ?our,? the ?Company?) has two classes of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the ?Exchange Act?) (1) common stock of the Company and (2) warrants to acquire sh

February 28, 2022 10-K

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

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

February 28, 2022 EX-21.1

List of Subsidiaries

Exhibit 21 List of Subsidiaries ? ? Subsidiary Name ? State of Formation American Ecology Environmental Services Corp.

February 25, 2022 8-K

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 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

February 25, 2022 EX-99.1

US Ecology Announces Fourth Quarter and Full Year 2021 Results

EXHIBIT 99.1 US Ecology Announces Fourth Quarter and Full Year 2021 Results BOISE, Idaho, Feb. 25, 2022 (GLOBE NEWSWIRE) - US Ecology, Inc. (NASDAQ-GS: ECOL) (?US Ecology? or ?the Company?) today reported results for the fourth quarter and year ended December 31, 2021. FOURTH QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Total revenue increases 8% to $261.4 million Waste Solutions Base Business grows

February 25, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ? ? Preliminary Proxy Statement ? Confident

February 16, 2022 SC 13D

ECOL / US Ecology Inc / Magnetar Financial LLC - SC 13D Activist Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D. C. 20549 SCHEDULE 13D Under the Securities Exchange Act of 1934 (Amendment No. )* US ECOLOGY, INC. (Name of Issuer) Common Stock, par value $.01 (Title of Class of Securities) 91734M103 (CUSIP Number of Class of Securities) Alec N. Litowitz Magnetar Capital LLC 1603 Orrington Ave. Evanston, Illinois 60201 (847) 905-4400 (Name, Address

February 16, 2022 EX-99.1

JOINT FILING AGREEMENT

Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k), as promulgated under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them a Statement on Schedule 13D (including amendments thereto) with regard to the common stock of US Ecology, Inc., and further agree that this Joint Filing Agreement be included as an Exh

February 14, 2022 SC 13G

ECOL / US Ecology Inc / THRIVENT FINANCIAL FOR LUTHERANS Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No.

February 11, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ? ? Preliminary Proxy Statement ? Confident

February 11, 2022 EX-99.1

Joint Press Release, dated February 9, 2022.

Exhibit 99.1 Republic Services to Acquire US Ecology, a Leading Environmental Solutions Company ? Enables Republic Services to provide customers with market-leading environmental solutions through a national footprint of vertically integrated assets and comprehensive capabilities ? After closing, Republic Services will offer one of the most complete set of products and services to meet customers?

February 11, 2022 EX-2.1

Agreement and Plan of Merger, dated as of February 8, 2022, by and among US Ecology, Inc., Republic Services, Inc., and Bronco Acquisition Corp.

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER by and among REPUBLIC SERVICES, INC. BRONCO ACQUISITION CORP. and US ECOLOGY, INC. dated as of February 8, 2022 THIS FORM OF AGREEMENT IS SUBJECT TO REVISION BY THE COMPANY AT ANY TIME. THIS FORM OF AGREEMENT SHALL BE KEPT CONFIDENTIAL PURSUANT TO THE TERMS OF THE CONFIDENTIALITY AGREEMENT ENTERED INTO BY THE RECIPIENT HEREOF (OR ITS AFFILIATE) WITH RESPECT

February 10, 2022 8-K

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Regulation FD Disclosure

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 8, 2022 US ECOLOGY, INC.

February 10, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

DEFA14A 1 tm226024d5defa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ ¨

February 10, 2022 EX-99.1

Joint Filing Agreement

EXHIBIT 99.1 Joint Filing Agreement The undersigned acknowledge and agree that the Schedule 13G with respect to beneficial ownership by the undersigned of shares of Common Stock, par value $0.01 per share, of US Ecology, Inc. filed on or about the date hereof is being filed on behalf of each of the undersigned in accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amende

February 10, 2022 EX-2.1

Agreement and Plan of Merger, dated as of February 8, 2022, by and among Republic Services, Inc., Bronco Acquisition Corp. and US Ecology, Inc.

Exhibit 2.1 AGREEMENT AND PLAN OF MERGER by and among REPUBLIC SERVICES, INC. BRONCO ACQUISITION CORP. and US ECOLOGY, INC. dated as of February 8, 2022 THIS FORM OF AGREEMENT IS SUBJECT TO REVISION BY THE COMPANY AT ANY TIME. THIS FORM OF AGREEMENT SHALL BE KEPT CONFIDENTIAL PURSUANT TO THE TERMS OF THE CONFIDENTIALITY AGREEMENT ENTERED INTO BY THE RECIPIENT HEREOF (OR ITS AFFILIATE) WITH RESPECT

February 10, 2022 EX-99.1

Joint Filing Agreement

EXHIBIT 99.1 Joint Filing Agreement The undersigned acknowledge and agree that the Schedule 13G with respect to beneficial ownership by the undersigned of shares of Common Stock, par value $0.01 per share, of US Ecology, Inc. filed on or about the date hereof is being filed on behalf of each of the undersigned in accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amende

February 10, 2022 SC 13G

ECOL / US Ecology Inc / Clarkston Capital Partners, LLC - SC 13G - US ECOLOGY, INC. AND CCP Passive Investment

SC 13G 1 usecologysc13g021022.htm SC 13G - US ECOLOGY, INC. AND CCP Page 1 of 13 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* US Ecology, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 91734M103 (CUSIP Number) January 28, 2022 (Date of Event Which Requires Filing of this Statement

February 10, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ? ? Preliminary Proxy Statement ? Confident

February 10, 2022 SC 13G/A

ECOL / US Ecology 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.: 2)* Name of issuer: US Ecology Inc. Title of Class of Securities: Common Stock CUSIP Number: 91734M103 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 filed: ??Rul

February 10, 2022 SC 13G

ECOL / US Ecology Inc / Clarkston Capital Partners, LLC - SC 13G - US ECOLOGY, INC. AND CCP Passive Investment

Page 1 of 13 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* US Ecology, Inc. (Name of Issuer) Common Stock (Title of Class of Securities) 91734M103 (CUSIP Number) January 28, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which

February 10, 2022 EX-99.1

Republic Services to Acquire US Ecology, a Leading Environmental Solutions Company

Exhibit 99.1 Republic Services to Acquire US Ecology, a Leading Environmental Solutions Company ? Enables Republic Services to provide customers with market-leading environmental solutions through a national footprint of vertically integrated assets and comprehensive capabilities ? After closing, Republic Services will offer one of the most complete set of products and services to meet customers?

February 9, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ ¨ Preliminary Proxy Statement ¨ Confident

February 9, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

DEFA14A 1 tm226024d1defa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ ¨

February 9, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

DEFA14A 1 tm226024d3defa14a.htm DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ ¨

February 9, 2022 DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (RULE 14a-101) SCHEDULE 14A INFORMATION INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant x Filed by a Party other than the Registrant ¨ ¨ Preliminary Proxy Statement ¨ Confident

February 4, 2022 SC 13G

ECOL / US Ecology Inc / WELLINGTON MANAGEMENT GROUP LLP - 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. )* US ECOLOGY, INC. (Name of Issuer) Common Stock (Title of Class of Securities) 91734M103 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedul

December 16, 2021 S-8

As filed with the Securities and Exchange Commission on December 16, 2021

As filed with the Securities and Exchange Commission on December 16, 2021 Registration No.

December 16, 2021 EX-15.1

Letter re: Unaudited Financial Statements of US Ecology, Inc.*

EX-15.1 3 tm2135646d1ex15-1.htm EXHIBIT 15.1 Exhibit 15.1 December 16, 2021 U.S. Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 We are aware that our reports dated May 3, 2021, August 2, 2021, and November 5, 2021 on our review of interim financial information of U.S. Ecology, Inc. appearing in U.S. Ecology, Inc.’s Quarterly Reports on Form 10-Q for the quarters ended March 31,

November 17, 2021 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, 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): November 11, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or other jurisdiction of incorporation or organization)

November 10, 2021 EX-99.1

Investor Presentation November 2021 2 Safe Harbor Forward looking statements These slides (and the accompanying oral discussion ) contain “forward - looking statements” within the meaning of the federal securities laws . Statements that are not histo

Exhibit 99.1 Investor Presentation November 2021 2 Safe Harbor Forward looking statements These slides (and the accompanying oral discussion ) contain ?forward - looking statements? within the meaning of the federal securities laws . Statements that are not historical facts, including statements about the beliefs and expectations of US Ecology, Inc . (the ?Company,? ?US Ecology,? ?we? or ?us), are

November 10, 2021 8-K

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): November 10, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or other jurisdiction of incorporation or organization)

November 5, 2021 10-Q

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

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

November 5, 2021 8-K

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 5, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

November 5, 2021 EX-15

Letter re: Unaudited Interim Financial Statements

EXHIBIT 15 November 5, 2021 ? The Board of Directors and Stockholders of US Ecology, Inc.

November 5, 2021 EX-99.1

US Ecology Announces Third Quarter 2021 Results

EXHIBIT 99.1 US Ecology Announces Third Quarter 2021 Results THIRD QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Waste Solutions Base Business growth accelerates to 11% on strong underlying fundamentals Waste Solutions Event Business declines 18% due to ongoing project deferments and service mix Field Services segment revenue grows 5% despite difficult comparison to last year Energy Waste recovery co

August 23, 2021 EX-99.1

Investor Presentation August 2021

EXHIBIT 99.1 Investor Presentation August 2021 2 Safe Harbor Forward looking statements These slides (and the accompanying oral discussion ) contain ?forward - looking statements? within the meaning of the federal securities laws . Statements that are not historical facts, including statements about the beliefs and expectations of US Ecology, Inc . (the ?Company,? ?US Ecology,? ?we? or ?us), are f

August 23, 2021 8-K

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): August 23, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or other jurisdiction of incorporation or organization) (C

August 2, 2021 10-Q

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

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

August 2, 2021 EX-15

Letter re: Unaudited Interim Financial Statements

EXHIBIT 15 August 2, 2021 ? The Board of Directors and Stockholders of US Ecology, Inc.

July 29, 2021 8-K

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 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Num

July 29, 2021 EX-99.1

US Ecology Announces Second Quarter 2021 Results

EXHIBIT 99.1 US Ecology Announces Second Quarter 2021 Results SECOND QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Waste Solutions Base Business returns to growth, up 7%, on strong underlying fundamentals Waste Solutions Event Business revenue declines 13% driven by project deferment and service mix Field Services segment grows 20% on increased business activity and solid execution Energy Waste perfo

July 1, 2021 EX-10.1

Fourth Amendment, dated as of June 29, 2021, by and among US Ecology Holdings, Inc., certain affiliate guarantors, each consenting lender and Wells Fargo Bank, National Association, as issuing lender, swingline lender and administrative agent

Exhibit 10.1 FOURTH AMENDMENT This Fourth Amendment, dated as of June 29, 2021 (this ?Amendment?), is entered into by and among US Ecology Holdings, Inc., a Delaware corporation (?Borrower?), the Subsidiary Guarantors, the Parent Guarantor, each Consenting Lender (as defined below) and Wells Fargo Bank, National Association, as administrative agent (in such capacity, ?Administrative Agent?) for th

July 1, 2021 8-K

Regulation FD Disclosure, Entry into a Material Definitive Agreement, 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): June 29, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or other jurisdiction of incorporation or organization) (Com

July 1, 2021 EX-99.1

US ECOLOGY AMENDS ITS CREDIT AGREEMENT EXTENDING MATURITY TO 2026 ON ITS REVOLVING CREDIT FACILITY

Exhibit 99.1 NEWS RELEASE For Immediate Release Contact: Steven Park, Director of Investor Relations (208) 871-1653 [email protected] www.usecology.com US ECOLOGY AMENDS ITS CREDIT AGREEMENT EXTENDING MATURITY TO 2026 ON ITS REVOLVING CREDIT FACILITY BOISE, Idaho June 30, 2021 - US Ecology, Inc. (NASDAQ-GS: ECOL) (?US Ecology? or ?the Company?) announced today that it amended its credit ag

June 1, 2021 EX-3.1

Certificate of Amendment to Amended and Restated Certificate of Incorporation of US Ecology, Inc.

Exhibit 3.1 Certificate of Amendment TO AMENDED AND RESTATED Certificate of Incorporation of US ECOLOGY, INC. (Pursuant to Section 242 of the General Corporation Law of the State of Delaware) US Ecology, INC., a corporation organized and existing under and by virtue of the provisions of the General Corporation Law of the State of Delaware (the ?Corporation?), does hereby certify: 1. That the Board

June 1, 2021 8-K

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, Financial Statements and Exhibits, Other Events, 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 25, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Numb

May 5, 2021 EX-99.1

Investor Presentation May 2021 2 Safe Harbor Forward looking statements These slides (and the accompanying oral discussion ) contain “forward - looking statements” within the meaning of the federal securities laws . Statements that are not historical

Exhibit 99.1 Investor Presentation May 2021 2 Safe Harbor Forward looking statements These slides (and the accompanying oral discussion ) contain “forward - looking statements” within the meaning of the federal securities laws . Statements that are not historical facts, including statements about the beliefs and expectations of US Ecology, Inc . (the “Company,” “US Ecology,” “we” or “us), are forw

May 5, 2021 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 5, 2021 US ECOLOGY, INC.

May 3, 2021 EX-10.3

*Form of Incentive Stock Option Award Agreement

Exhibit 10.3 ? US ECOLOGY, INC. ? INCENTIVE STOCK OPTION AGREEMENT ? Effective [GrantDate] (the ?Effective Date?), US Ecology, Inc., a Delaware corporation (the ?Company?), hereby grants to [FirstLast] (the ?Optionee?) an Incentive Stock Option to purchase from the Company, at an exercise price of $[OptionPrice] per Share, [Total] Shares (the ?Option?) subject to the terms and conditions set forth

May 3, 2021 EX-10.1

*US Ecology, Inc. 2021 Management Incentive Plan

? Exhibit 10.1 ? US ECOLOGY, INC. MANAGEMENT INCENTIVE PLAN ? This US Ecology, Inc. Management Incentive Plan (?Plan?) is entered into between (?Employee?) and US Ecology, Inc., including its parents, affiliates, subsidiaries, and divisions for which Employee will work during his or her employment. ? I.PURPOSE The US Ecology Inc. Amended and Restated Omnibus Incentive Plan authorizes the Compensat

May 3, 2021 EX-10.4

*Form of Non-Qualified Stock Option Award Agreement

Exhibit 10.4 ? US ECOLOGY, INC. ? NON-QUALIFIED OPTION AGREEMENT ? Effective [GrantDate] (the ?Effective Date?), US Ecology, Inc., a Delaware corporation (the ?Company?), hereby grants to [FirstLast] (the ?Optionee?) a Non-Qualified Option to purchase from the Company, at an exercise price of $[OptionPrice] per Share, [Total] Shares (the ?Option?) subject to the terms and conditions set forth in t

May 3, 2021 EX-10.2

*Form of Restricted Stock Award Agreement

? Exhibit 10.2 US ECOLOGY, INC. RESTRICTED STOCK AGREEMENT This RESTRICTED STOCK AGREEMENT (this ?Agreement?) is entered into as of [GrantDate] (the ?Grant Date?), between US Ecology, Inc., a Delaware corporation (the ?Company?), and [FirstLast] (the ?Grantee?). WHEREAS, the Company maintains the Amended and Restated US Ecology, Inc. Omnibus Incentive Plan (as amended and/or restated from time to

May 3, 2021 10-Q

Quarterly Report - 10-Q

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

May 3, 2021 EX-15

Letter re: Unaudited Interim Financial Statements

EXHIBIT 15 May 3, 2021 ? The Board of Directors and Stockholders of US Ecology, Inc.

April 29, 2021 EX-99.1

US Ecology Announces First Quarter 2021 Results; Reaffirms 2021 Business Outlook

EXHIBIT 99.1 US Ecology Announces First Quarter 2021 Results; Reaffirms 2021 Business Outlook FIRST QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Revenue of $228.6 million, down 5% Field Services revenue grew 4% Waste Solutions Base Business revenue declined 3%; Event Business revenue declined 9% Net loss of $796,000, or $0.03 per diluted share Adjusted loss per diluted share of $0.07 Adjusted EBITDA

April 29, 2021 8-K

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, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Nu

April 13, 2021 DEF 14A

*Amendment 1 to the Amended and Restated US Ecology, Inc. Omnibus Incentive Plan

? 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 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)) ? ? Definitive Proxy Statement ? ? Definitive Additional Materials ? ? Soliciting Material Pursuant to Rule 14a-12 ? US ECOLOGY, INC.

April 13, 2021 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 x 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 14a-6(e)(2)) o Defin

March 31, 2021 PRE 14A

- PRE 14A

PRE 14A 1 tm212516-1pre14a.htm PRE 14A 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 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

March 18, 2021 8-K

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): March 18, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Nu

March 18, 2021 EX-99.1

Investor Presentation March 2021 2 Safe Harbor Forward looking statements These slides (and the accompanying oral discussion ) contain “forward - looking statements” within the meaning of the federal securities laws . Statements that are not historic

Exhibit 99.1 Investor Presentation March 2021 2 Safe Harbor Forward looking statements These slides (and the accompanying oral discussion ) contain “forward - looking statements” within the meaning of the federal securities laws . Statements that are not historical facts, including statements about the beliefs and expectations of US Ecology, Inc . (the “Company,” “US Ecology,” “we” or “us), are fo

March 1, 2021 EX-10.15

*Amended and Restated Executive Employment Agreement, effective December 22, 2020, between the Company and Steven D. Welling

Exhibit 10.15 AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT (this ?Employment Agreement?) is made and entered into effective as of the 22nd day of December, 2020 (the ?Effective Date?), by and between US ECOLOGY, INC., a Delaware corporation (the ?Company?), and STEVEN D. WELLING (?Executive?). The Company and Executive are sometimes c

March 1, 2021 EX-10.18

*Amended and Restated Executive Employment Agreement, effective December 22, 2020, between the Company and Andrew P. Marshall

Exhibit 10.18 AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT (this ?Employment Agreement?) is made and entered into effective as of the 22nd day of December, 2020 (the ?Effective Date?), by and between US ECOLOGY, INC., a Delaware corporation (the ?Company?), and ANDREW P. MARSHALL (?Executive?). The Company and Executive are sometimes

March 1, 2021 EX-3.2

Amended and Restated Bylaws of US Ecology, Inc

? Exhibit 3.2 ? AMENDED AND RESTATED BYLAWS (dated November 1, 2019 and restated to give effect to Amendment No. 1 dated January 15, 2021) ? OF ? US ECOLOGY, INC. (hereinafter called the ?Corporation?) ? ARTICLE I OFFICES ? Section 1. Registered Office. The registered office of the Corporation shall be in the City of Wilmington, County of New Castle, State of Delaware. ? Section 2. Other Offices.

March 1, 2021 EX-10.14

*Amended and Restated Executive Employment Agreement, effective December 22, 2020, between the Company and Eric L. Gerratt

Exhibit 10.14 AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT (this ?Employment Agreement?) is made and entered into effective as of the 22nd day of December, 2020 (the ?Effective Date?), by and between US ECOLOGY, INC., a Delaware corporation (the ?Company?), and ERIC L. GERRATT (?Executive?). The Company and Executive are sometimes col

March 1, 2021 10-K

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

Table of Contents 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 For the transition period from to . Commission file number: 001-39120 US EC

March 1, 2021 EX-10.13

*Amended and Restated Executive Employment Agreement, dated December 22, 2020, between the Company and Jeffrey R. Feeler

Exhibit 10.13 AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT (this ?Employment Agreement?) is made and entered into effective as of the 22nd day of December, 2020 (the ?Effective Date?), by and between US ECOLOGY, INC., a Delaware corporation (the ?Company?), and JEFFREY R. FEELER (?Executive?). The Company and Executive are sometimes c

March 1, 2021 EX-10.6

*Amended and Restated US Ecology Inc. Omnibus Incentive Plan

Exhibit 10.6 AMENDED AND RESTATED US ECOLOGY, INC. OMNIBUS INCENTIVE PLAN Section 1.Purpose of the Plan. The purpose of the Amended and Restated US Ecology, Inc. Omnibus Incentive Plan (the “Plan”) is to assist the Company and its Subsidiaries in attracting, motivating and retaining valued Employees, Consultants and Non-Employee Directors by offering them a greater stake in the Company’s success a

March 1, 2021 EX-10.16

*Amended and Restated Executive Employment Agreement, effective December 22, 2020, between the Company and Simon G. Bell

Exhibit 10.16 AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT This AMENDED AND RESTATED EXECUTIVE EMPLOYMENT AGREEMENT (this ?Employment Agreement?) is made and entered into effective as of the 22nd day of December, 2020 (the ?Effective Date?), by and between US ECOLOGY, INC., a Delaware corporation (the ?Company?), and SIMON G. BELL (?Executive?). The Company and Executive are sometimes colle

March 1, 2021 EX-4.2

Description of Securities

Exhibit 4.2 DESCRIPTION OF THE COMPANY?S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED As of December 31, 2020, US Ecology, Inc. (?we,? ?our,? the ?Company?) has two classes of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the ?Exchange Act?) (1) common stock of the Company and (2) warrants to acquire sh

March 1, 2021 EX-21

List of Subsidiaries

Exhibit 21 List of Subsidiaries Subsidiary Name State of Formation American Ecology Environmental Services Corp.

February 25, 2021 EX-99.1

US Ecology Announces Fourth Quarter and Full Year 2020 Results; Initiates 2021 Business Outlook

EXHIBIT 99.1 US Ecology Announces Fourth Quarter and Full Year 2020 Results; Initiates 2021 Business Outlook FOURTH QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Revenue of $241.1 million, up 4% including NRC Base Business revenue declined 8%; Event Business revenue declined 3% Field Services revenue grew 16%, excluding NRC Goodwill and intangible asset impairment charges of $104.6 million Net loss o

February 25, 2021 8-K

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, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

February 12, 2021 EX-99.1

US ECOLOGY ANNOUNCES APPOINTMENT OF MACK L. HOGANS TO ITS BOARD OF DIRECTORS

EX-99.1 2 usecologyex9901.htm PRESS RELEASE Exhibit 99.1 NEWS RELEASE For Immediate Release Contact: Alison Ziegler, Darrow Associates (201) 220-2678 [email protected] www.usecology.com US ECOLOGY ANNOUNCES APPOINTMENT OF MACK L. HOGANS TO ITS BOARD OF DIRECTORS Boise, Idaho, February 12, 2021 - US Ecology, Inc. (“US Ecology” or the “Company”) [NASDAQ-GS:ECOL] is pleased to announce the appoin

February 12, 2021 8-K

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): February 12, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

February 10, 2021 SC 13G/A

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 1)* Name of issuer: US Ecology Inc. Title of Class of Securities: Common Stock CUSIP Number: 91734M103 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 filed: ☒ Rul

January 20, 2021 EX-3.1

Amendment No. 1 to Amended and Restated Bylaws of US Ecology, Inc.

Exhibit 3.1 AMENDMENT NO. 1 TO AMENDED AND RESTATED BYLAWS OF US ECOLOGY, INC. Pursuant to the resolutions duly adopted by the Board of Directors of US Ecology, Inc., a Delaware corporation (the “Corporation”), and in accordance with Article VIII of the Amended and Restated Bylaws of the Corporation, effective November 1, 2019 (the “Bylaws”), the Bylaws are amended as set forth below. Except as sp

January 20, 2021 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, 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): January 15, 2021 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

December 23, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers - FORM 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 17, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

November 12, 2020 EX-99.1

1 November 2020 Investor Presentation 2 Safe Harbor These slides contain (and the accompanying oral discussion will contain) forward - looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 . Forward looking st

Exhibit 99.1 1 November 2020 Investor Presentation 2 Safe Harbor These slides contain (and the accompanying oral discussion will contain) forward - looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 . Forward looking statements are only predictions and are not guarantees of performance . These statements are based on management’s beliefs and assumptions,

November 12, 2020 8-K

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): November 12, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

November 6, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents 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 For the transition period from to . Commission file number: 001-39

November 6, 2020 EX-15

Letter re: Unaudited Interim Financial Statements

EXHIBIT 15 November 6, 2020 The Board of Directors and Stockholders of US Ecology, Inc.

November 5, 2020 EX-99.1

US Ecology Announces Third Quarter 2020 Results; Reinstates Full Year Guidance

EXHIBIT 99.1 US Ecology Announces Third Quarter 2020 Results; Reinstates Full Year Guidance THIRD QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Revenue of $238.1 million, up 42% including NRC Legacy US Ecology revenue declined 6% Base Business revenue decline of 15%; Event Business revenue growth of 8%, excluding NRC Field and Industrial Services revenue growth of 10%, excluding NRC Net income of $6.

November 5, 2020 8-K

Financial Statements and Exhibits, Results of Operations and Financial Condition - FORM 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): November 5, 2020 US Ecology, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

September 30, 2020 EX-99.1

1 Stifel “Virtual” Investor Tour: September 30, 2020 Investor Presentation: Gulf Operations 2 Safe Harbor These slides contain (and the accompanying oral discussion will contain) “forward - looking statements” within the meaning of the Private Securi

Exhibit 99.1 1 Stifel “Virtual” Investor Tour: September 30, 2020 Investor Presentation: Gulf Operations 2 Safe Harbor These slides contain (and the accompanying oral discussion will contain) “forward - looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 . Forward looking statements are only predictions and are not guarantees of performance . These statem

September 30, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 30, 2020 US ECOLOGY, INC.

August 10, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents 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 For the transition period from to . Commission file number: 001-39120 U

August 10, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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, 2020 US ECOLOGY, INC.

August 10, 2020 EX-15

Letter re: Unaudited Interim Financial Statements

EXHIBIT 15 August 7, 2020 The Board of Directors and Stockholders of US Ecology, Inc.

August 10, 2020 EX-99.1

1 August 2020 Investor Presentation 2 Safe Harbor These slides contain (and the accompanying oral discussion will contain) “forward - looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 . Forward looking sta

Exhibit 99.1 1 August 2020 Investor Presentation 2 Safe Harbor These slides contain (and the accompanying oral discussion will contain) “forward - looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 . Forward looking statements are only predictions and are not guarantees of performance . These statements are based on management’s beliefs and assumptions,

August 6, 2020 EX-99.1

US Ecology Announces Second Quarter 2020 Results

EXHIBIT 99.1 US Ecology Announces Second Quarter 2020 Results SECOND QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Revenue of $213.9 million, up 37%, including $70.4 million from NRC Legacy US Ecology revenue declined 8% Base Business revenue decline of 10%; Event Business revenue growth of 12%, excluding NRC Field and Industrial Services revenue down 6%, excluding NRC Net loss of $5.2 million, or $0

August 6, 2020 8-K

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): August 6, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Nu

July 20, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits - FORM 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): July 16, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Num

July 6, 2020 EX-14.1

Code of Business Conduct

Exhibit 14.1 CODE OF BUSINESS CONDUCT June 2020 Thank you for your continued dedication to US Ecology and your commitment to upholding the standards set forth in our Code of Business Conduct. CEO MESSAGE Dear Team Members: As US Ecology continues to grow, evolving to meet the needs of the marketplace, one thing that does not change is our commitment to operating with the highest ethical standards.

July 6, 2020 8-K

Amendment to Registrant's Code of Ethics, or Waiver of a Provision of the Code of Ethics, 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): June 30, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Num

June 30, 2020 EX-10.1

Third Amendment, dated as of June 26, 2020, by and among US Ecology Holdings, Inc., certain affiliate guarantors, each consenting lender and Wells Fargo Bank, National Association, as lender and administrative agent

Exhibit 10.1 THIRD AMENDMENT This Third Amendment, dated as of June 26, 2020 (this “Amendment”), is entered into by and among US Ecology Holdings, Inc., a Delaware corporation (“Borrower”), the Subsidiary Guarantors, the Parent Guarantor, each Consenting Lender (as defined below) and Wells Fargo Bank, National Association, as administrative agent (in such capacity, “Administrative Agent”) for the

June 30, 2020 8-K

Entry into a Material Definitive Agreement, 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): June 26, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Num

June 9, 2020 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events, Submission of Matters to a Vote of Security Holders - FORM 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): June 3, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Numb

June 2, 2020 EX-99.1

1 June 2020 Investor Presentation

Exhibit 99.1 1 June 2020 Investor Presentation 2 Safe Harbor These slides contain (and the accompanying oral discussion will contain) “forward - looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 . Forward looking statements are only predictions and are not guarantees of performance . These statements are based on management’s beliefs and assumptions, wh

June 2, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits - FORM 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 2, 2020 US ECOLOGY, INC.

May 22, 2020 DEFA14A

- DEFINITIVE ADDITIONAL MATERIALS

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 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)) [] Definitive Proxy Statement [?] Definitive Additional Materials [] Soliciting Material Pursuant to Rule 14a-12 US ECOLOGY, INC.

May 13, 2020 SC 13G/A

ECOL / US Ecology, Inc. / JFL-NRC-SES Partners, LLC - AMENDMENT NO. 3 TO 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. 3)* US ECOLOGY, INC. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 91734M103 (CUSIP Number) May 4, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant

May 11, 2020 EX-10.2

Form of Restricted Stock Award Agreement *

Exhibit 10.2 US ECOLOGY, INC. RESTRICTED SHARE AGREEMENT THIS RESTRICTED SHARE AGREEMENT is entered into as of (the “Grant Date”), between US Ecology, Inc., a Delaware corporation (the “Company”), and (the “Grantee”). WHEREAS, the Company has adopted the Amended and Restated US Ecology, Inc. Omnibus Incentive Plan (the “Plan”) pursuant to which Restricted Shares may be granted; and WHEREAS, the Co

May 11, 2020 EX-15

Letter re: Unaudited Interim Financial Statements

EXHIBIT 15 May 11, 2020 The Board of Directors and Stockholders of US Ecology, Inc.

May 11, 2020 10-Q

Quarterly Report - 10-Q

Table of Contents 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 For the transition period from to . Commission file number: 001-39120

May 11, 2020 EX-10.4

Form of Non-Statutory Stock Option Award Agreement *

Exhibit 10.4 US ECOLOGY, INC. FORM OF NON-STATUTORY STOCK OPTION AGREEMENT Effective (the “Effective Date”), US Ecology, Inc., a Delaware corporation (the “Company”) hereby grants to (the “Optionee”), a non-statutory stock option (“NQ”) to purchase from the Company, at a price of $XX.XX per share, X,XXX shares of the Company’s authorized and unissued common stock, $0.01 par value per share (the “C

May 11, 2020 EX-10.1

US Ecology, Inc. 2020 Management Incentive Plan *

Exhibit 10.1 US ECOLOGY, INC. Management Incentive Plan I. PURPOSE The US Ecology, Inc. Amended and Restated Omnibus Incentive Plan authorizes the Compensation Committee (“Committee”) of the Board of Directors (“Board”) of US Ecology, Inc. (“Company”) to grant performance-based awards denominated in cash in such amounts and subject to such terms and conditions as the Committee may determine. The U

May 11, 2020 EX-10.3

Form of Incentive Stock Option Award Agreement *

Exhibit 10.3 US ECOLOGY, INC. FORM OF INCENTIVE STOCK OPTION AGREEMENT Effective (the “Effective Date”), US Ecology, Inc., a Delaware corporation (the “Company”) hereby grants to (the “Optionee”), an Incentive Stock Option (“ISO”) to purchase from the Company, at a price of $XX.XX per share, X,XXX shares of the Company’s authorized and unissued common stock, $0.01 par value per share (the “Common

May 7, 2020 EX-99.1

US Ecology Announces First Quarter 2020 Results

EXHIBIT 99.1 US Ecology Announces First Quarter 2020 Results FIRST QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Revenue of $240.7 million, up 84%, including $86.6 million from NRC Organic revenue growth of 18% on legacy US Ecology business Base Business growth of 5%; Event Business growth of 102%, excluding NRC Field and Industrial Services revenue up 14%, excluding NRC, with margin expansion $300.3

May 7, 2020 8-K

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): May 7, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Numbe

April 20, 2020 DEF 14A

ECOL / US Ecology, Inc. DEF 14A - - DEF 14A

QuickLinks - Click here to rapidly navigate through this document UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 20, 2020 DEFA14A

ECOL / US Ecology, 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 x 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 14a-6(e)(2)) o Defin

April 3, 2020 8-K

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): April 2, 2020 US ECOLOGY, INC. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Num

April 3, 2020 EX-99.1

US ECOLOGY ANNOUNCES FORMATION OF BOARD CORPORATE RESPONSIBILITY AND RISK COMMITTTEE

EXHIBIT 99.1 US ECOLOGY ANNOUNCES FORMATION OF BOARD CORPORATE RESPONSIBILITY AND RISK COMMITTTEE Boise, Idaho – April 2, 2020 – US Ecology, Inc. (NASDAQ-GS: ECOL) (“US Ecology” or “the Company”) today announces that the Company’s Board of Directors (the “Board”) have formed a Corporate Responsibility and Risk Committee (the “Committee”) to oversee and monitor the Company’s enterprise-wide approac

March 31, 2020 EX-99.1

US ECOLOGY ANNOUNCES CAPITAL PRESERVATION INITIATIVES

EXHIBIT 99.1 US ECOLOGY ANNOUNCES CAPITAL PRESERVATION INITIATIVES Reduces 2020 capital spending plan by $30 million, or 30% Temporarily suspends dividend to preserve free cash flow and enhance liquidity Defensible and scalable business model as well as financial flexibility positions the business to withstand uncertain times Withdraws 2020 financial guidance due to the increased uncertainty of th

March 31, 2020 8-K

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): March 31, 2020 US Ecology, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File Nu

March 5, 2020 SC 13G/A

ECOL / US Ecology, Inc. / JFL-NRC-SES Partners, LLC - AMENDMENT NO. 2 TO 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 ECOLOGY, INC. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 91734M103 (CUSIP Number) February 28, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pu

March 3, 2020 EX-99.1

1 March 2020 Investor Presentation 2 Safe Harbor During the course of this presentation US Ecology, Inc . (“US Ecology,” the “Company” or “we”) will be making forward - looking statements (as such term is defined in the Private Securities Litigation

Exhibit 99.1 1 March 2020 Investor Presentation 2 Safe Harbor During the course of this presentation US Ecology, Inc . (“US Ecology,” the “Company” or “we”) will be making forward - looking statements (as such term is defined in the Private Securities Litigation Reform Act of 1995 ) that are based on our current expectations, beliefs and assumptions about the industry and markets in which US Ecolo

March 3, 2020 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 3, 2020 US ECOLOGY, INC.

March 2, 2020 EX-21

List of Subsidiaries

Exhibit 21 List of Subsidiaries Subsidiary Name State of Formation American Ecology Environmental Services Corp.

March 2, 2020 EX-4.2

Description of Securities

Exhibit 4.2 DESCRIPTION OF THE COMPANY’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED As of December 31, 2019, US Ecology, Inc. (“we,” “our,” the “Company”) has two classes of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) (1) common stock of the Company and (2) warrants to acquire sh

March 2, 2020 10-K

ECOL / US Ecology, Inc. 10-K - Annual Report - 10-K

Table of Contents 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 For the transition period from to . Commission file number: 001-39120 US EC

February 26, 2020 EX-99.1

US Ecology Announces Fourth Quarter and Full Year 2019 Results and 2020 Business Outlook

EX-99.1 2 exh991.htm PRESS RELEASE EXHIBIT 99.1 US Ecology Announces Fourth Quarter and Full Year 2019 Results and 2020 Business Outlook FOURTH QUARTER HIGHLIGHTS COMPARED TO PRIOR YEAR: Revenue of $231.3 million, up 47%, including $70.2 million for two months of NRC Base Business growth of 5%; Event Business growth of 12%, excluding NRC Field and Industrial Services revenue down 3%, excluding NRC

February 26, 2020 8-K

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, 2020 US Ecology, Inc. (Exact name of registrant as specified in its charter) Delaware 001-39120 84-2421185 (State or Other Jurisdiction of Incorporation) (Commission File

February 14, 2020 SC 13G/A

ECOL / US Ecology, Inc. / SILVERCREST ASSET MANAGEMENT GROUP LLC - SC 13G/A Passive Investment

SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4)* US Ecology, Inc. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 91734M103 (CUSIP Number) December 31, 2019 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate th

February 14, 2020 EX-99.1

JOINT FILING AGREEMENT

Exhibit 1 Exhibit 1 JOINT FILING AGREEMENT This Joint Filing Agreement, dated as of February 14, 2020, is by and among Silvercrest Asset Management Group LLC, Silvercrest L.

February 12, 2020 SC 13G/A

ECOL / US Ecology, Inc. / JFL-NRC-SES Partners, LLC - AMENDMENT NO.1 TO 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 ECOLOGY, INC. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 91734M103 (CUSIP Number) February 6, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pur

February 11, 2020 SC 13G

ECOL / US Ecology, Inc. / VANGUARD GROUP INC - SCHEDULE 13G Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 Name of issuer: US Ecology Inc Title of Class of Securities: Common Stock CUSIP Number: 91734M103 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: ☒ Rule 13d-1(b) ☐ Rule 13d

January 7, 2020 EX-4.1

*US Ecology, Inc. Nonqualified Deferred Compensation Plan

Exhibit 4.1 THE EXECUTIVE NONQUALIFIED EXCESS PLAN PLAN DOCUMENT THE EXECUTIVE NONQUALIFIED EXCESS PLAN Section 1. Purpose: By execution of the Adoption Agreement, the Employer has adopted the Plan set forth herein, and in the Adoption Agreement, to provide a means by which certain management Employees or Independent Contractors of the Employer may elect to defer receipt of current Compensation fr

January 7, 2020 S-8

ECOL / US Ecology, Inc. S-8 - - S-8

As filed with the Securities and Exchange Commission on January 7, 2020 Registration No.

January 7, 2020 EX-15.1

Letter re: Unaudited Financial Statements of US Ecology, Inc.

Exhibit 15.1 January 6, 2020 The Board of Directors and Stockholders of U.S. Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 We are aware that our reports dated May 6, 2019, August 5, 2019, and November 4, 2019 on our reviews of interim financial information of U.S. Ecology, Inc. appearing in U.S. Ecology, Inc’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2019

January 6, 2020 S-3ASR

ECOL / US Ecology, Inc. S-3ASR - - S-3ASR

Table of Contents As filed with the Securities and Exchange Commission on January 6, 2020.

January 6, 2020 EX-15.1

Letter re: Unaudited Interim Financial Statements.

Exhibit 15.1 January 6, 2020 The Board of Directors and Stockholders of U.S. Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 We are aware that our reports dated May 6, 2019, August 5, 2019, and November 4, 2019 on our reviews of interim financial information of U.S. Ecology, Inc. appearing in U.S. Ecology, Inc’s Quarterly Reports on Form 10-Q for the quarters ended March 31, 2019

January 6, 2020 EX-99.1

Unaudited Pro Forma Combined Financial Statements for the period ended September 30, 2019.

Exhibit 99.1 UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS On June 23, 2019, US Ecology, Inc. (f/k/a as US Ecology Parent, Inc.) (“US Ecology” or the “Company”) entered into an Agreement and Plan of Merger (the “Merger Agreement”) with NRC Group Holdings Corp., a Delaware corporation (“NRCG”), US Ecology Holdings, Inc. (f/k/a US Ecology, Inc.) (“Predecessor US Ecology”), Rooster Merg

December 9, 2019 EX-99.1

US Ecology Announces Intent to Continue its Listing of Warrants on Nasdaq

Exhibit 99.1 NEWS RELEASE For Immediate Release Contact: Alison Ziegler, Darrow Associates (201) 220-2678 [email protected] www.usecology.com US Ecology Announces Intent to Continue its Listing of Warrants on Nasdaq Boise, Idaho – December 9, 2019 – On December 5, 2019, US Ecology, Inc. (the “Company”) withdrew its notice to delist its warrants to purchase shares of the Company’s common stock,

December 9, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 9, 2019 US ECOLOGY, INC.

November 21, 2019 EX-99.1

US Ecology Announces Intent to Voluntarily Delist its Warrants from the Nasdaq Global Select Market and Move Trading of the Warrants to the NYSE American Exchange

Exhibit 99.1 NEWS RELEASE For Immediate Release Contact: Alison Ziegler, Darrow Associates (201) 220-2678 [email protected] www.usecology.com US Ecology Announces Intent to Voluntarily Delist its Warrants from the Nasdaq Global Select Market and Move Trading of the Warrants to the NYSE American Exchange Boise, Idaho – November 20, 2019 – On November 1, 2019, US Ecology, Inc. (the “Company”) co

November 21, 2019 8-K

Regulation FD Disclosure, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 19, 2019 US ECOLOGY, INC.

November 12, 2019 EX-99.1

Joint Filing Agreement dated November 12, 2019

Exhibit 1 JOINT FILING AGREEMENT In accordance with Rule 13d?1(k)(l) under the Securities Exchange Act of 1934, as amended, each of the undersigned hereby agrees to the joint filing, along with such other undersigned, on behalf of the Reporting Persons (as defined in the joint filing), of a statement on Schedule 13G (including any amendments thereto) with respect to the shares of Common Stock, par value $0.

November 12, 2019 EX-99.2

Power of Attorney

Exhibit 2 POWER OF ATTORNEY Each of the undersigned hereby constitutes and appoints David L.

November 12, 2019 SC 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. ___)* US ECOLOGY, INC. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securitie

SC 13G 1 sc13g1119jflusecology.htm SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* US ECOLOGY, INC. (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 91734M103 (CUSIP Number) November 1, 2019 (Date of Event Which Requires Filing of this Statement) Chec

November 7, 2019 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Other Events

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 1, 2019 US ECOLOGY, INC.

November 4, 2019 8-K

Regulation FD Disclosure, Financial Statements and Exhibits

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 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 4, 2019 US ECOLOGY, INC.

November 4, 2019 EX-99.1

1 November 2019 Investor Presentation 2 Safe Harbor During the course of this presentation the Company will be making forward - looking statements (as such term is defined in the Private Securities Litigation Reform Act of 1995 ) that are based on ou

Exhibit 99.1 1 November 2019 Investor Presentation 2 Safe Harbor During the course of this presentation the Company will be making forward - looking statements (as such term is defined in the Private Securities Litigation Reform Act of 1995 ) that are based on our current expectations, beliefs and assumptions about the industry and markets in which US Ecology, Inc . and its subsidiaries operate .

November 4, 2019 10-Q

ECOL / US Ecology, Inc. 10-Q - Quarterly Report - 10-Q

Table of Contents 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 For the transition period from to . Commission file number: 000-11

November 4, 2019 EX-15

Letter re: Unaudited Interim Financial Statements

EXHIBIT 15 November 4, 2019 US Ecology, Inc. 101 S. Capitol Blvd. Suite #1000 Boise, Idaho 83702 We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited interim financial information of US Ecology, Inc. and subsidiaries for the three-month and nine-month periods ended September 30, 2019 and 2018, as indicated in our report

November 1, 2019 EX-99.3

*Amended and Restated US Ecology, Inc. 2018 Equity and Incentive Compensation Plan

Exhibit 99.3 AMENDED AND RESTATED US ECOLOGY, INC. 2018 EQUITY AND INCENTIVE COMPENSATION PLAN 1. Purpose. The purpose of this Plan is to retain non-employee Directors, officers and other employees of the Company and its Subsidiaries, and certain other service providers to the Company and its Subsidiaries, and to provide to such persons incentives and rewards for service and/or performance. In con

November 1, 2019 S-8

ECOL / US Ecology, Inc. S-8 - - S-8

As filed with the Securities and Exchange Commission on November 1, 2019 Registration No.

November 1, 2019 EX-99.1

*Amended and Restated US Ecology Inc. Omnibus Incentive Plan

Exhibit 99.1 AMENDED AND RESTATED US ECOLOGY, INC. OMNIBUS INCENTIVE PLAN Section 1. Purpose of the Plan. The purpose of the Amended and Restated US Ecology, Inc. Omnibus Incentive Plan (the “Plan”) is to assist the Company and its Subsidiaries in attracting, motivating and retaining valued Employees, Consultants and Non-Employee Directors by offering them a greater stake in the Company’s success

November 1, 2019 EX-99.2

*Amended and Restated US Ecology, Inc. 2008 Stock Option Incentive Plan

Exhibit 99.2 AMENDED AND RESTATED US ECOLOGY, INC. 2008 STOCK OPTION INCENTIVE PLAN 1. PURPOSE. The purpose of this Amended and Restated US Ecology, Inc. 2008 Stock Option Incentive Plan (the “Plan”) is to enable US Ecology, Inc., formerly known as US Ecology Parent, Inc. (the “Company”), to retain the services of (i) selected employees, officers and directors of the Company or any subsidiary of t

November 1, 2019 EX-15.1

Letter re: Unaudited Financial Statements of US Ecology Holdings, Inc. (f/k/a US Ecology, Inc.)

Exhibit 15.1 November 1, 2019 U.S. Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited interim financial information of U.S. Ecology, Inc. and subsidiaries for the three-month periods ended March 31, 2019 and 2018, and have issued our report dated May 6,

November 1, 2019 8-A12B

ECOL / US Ecology, Inc. 8-A12B - - 8-A12B

U.S. SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 US ECOLOGY, INC. (Exact Name of Registrant as Specified in Its Charter) Delaware 95-3889638 (State of Incorporation or Organization) (I.R.S. Employer Identification No.) 101 S. Capitol Blvd., Suite 1000 B

November 1, 2019 8-K

Regulation FD Disclosure, 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, Financial Statements and Exhibits, 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, DC 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 1, 2019 US ECOLOGY, INC.

November 1, 2019 EX-99.1

US ECOLOGY COMPLETES MERGER WITH NRC GROUP, CREATING A NATIONWIDE LEADER IN INDUSTRIAL AND HAZARDOUS WASTE MANAGEMENT SERVICES

Exhibit 99.1 NEWS RELEASE For Immediate Release Contact: Alison Ziegler, Darrow Associates (201) 220-2678 [email protected] www.usecology.com US ECOLOGY COMPLETES MERGER WITH NRC GROUP, CREATING A NATIONWIDE LEADER IN INDUSTRIAL AND HAZARDOUS WASTE MANAGEMENT SERVICES Boise, Idaho — November 1, 2019 — US Ecology, Inc. (NASDAQ-GS: ECOL) (the “Company” or “US Ecology”) today announced the comple

November 1, 2019 EX-3.1

Amended and Restated Certificate of Incorporation of US Ecology, Inc.

Exhibit 3.1 EXECUTION VERSION AMENDED AND RESTATED CERTIFICATE OF INCORPORATION OF US ECOLOGY PARENT, INC. a Delaware Corporation JEFFREY R. FEELER and WAYNE R. IPSEN certify that: 1. They are the President and Secretary, respectively, of US Ecology Parent, Inc. a corporation duly incorporated under the laws of the State of Delaware pursuant to the filing of its original certificate of incorporati

November 1, 2019 EX-10.4

Amended and Restated US Ecology, Inc. 2018 Equity and Incentive Compensation Plan, effective as of November 1, 2019

Exhibit 10.4 AMENDED AND RESTATED US ECOLOGY, INC. 2018 EQUITY AND INCENTIVE COMPENSATION PLAN 1. Purpose. The purpose of this Plan is to retain non-employee Directors, officers and other employees of the Company and its Subsidiaries, and certain other service providers to the Company and its Subsidiaries, and to provide to such persons incentives and rewards for service and/or performance. In con

November 1, 2019 EX-10.3

Amended and Restated US Ecology, Inc. 2008 Stock Option Incentive Plan , effective as of November 1, 2019

Exhibit 10.3 AMENDED AND RESTATED US ECOLOGY, INC. 2008 STOCK OPTION INCENTIVE PLAN 1. PURPOSE. The purpose of this Amended and Restated US Ecology, Inc. 2008 Stock Option Incentive Plan (the “Plan”) is to enable US Ecology, Inc., formerly known as US Ecology Parent, Inc. (the “Company”), to retain the services of (i) selected employees, officers and directors of the Company or any subsidiary of t

November 1, 2019 EX-3.2

Amended and Restated Bylaws of US Ecology, Inc.

Exhibit 3.2 AMENDED AND RESTATED BYLAWS OF US ECOLOGY, INC. November 1, 2019 TABLE OF CONTENTS Page ARTICLE I OFFICES 1 Section 1. Registered Office 1 Section 2. Other Offices 1 ARTICLE II MEETING OF STOCKHOLDERS 1 Section 1. Place of Meetings 1 Section 2. Annual Meetings 1 Section 3. Special Meetings 1 Section 4. Notice of Meetings 1 Section 5. Quorum; Adjournment 2 Section 6. Proxies and Voting

November 1, 2019 EX-10.1

Second Amendment, dated as of November 1, 2019, by and among US Ecology Holdings, Inc., certain subsidiary guarantors, each consenting lender and Wells Fargo Bank, National Association, as lender and administrative agent to the Credit Agreement, dated April 18, 2017, by and among US Ecology, Inc., the lenders referred to therein, Wells Fargo Bank, National Association, as administrative agent, Bank of America, N.A., as issuing lender, Wells Fargo Securities, LLC and Merrill Lynch, Pierce, Fenner & Smith Incorporated, as joint lead arrangers and joint bookrunners, Bank of America, N.A., as syndication agent and Bank of Montreal, PNC Bank, National Association and US Bank National Association, as co-documentation agents

Exhibit 10.1 Execution Version CUSIP Number for Incremental Term B Loans: 90349YAF3 ISIN for Incremental Term B Loans: US90349YAF34 LENDER JOINDER AGREEMENT AND SECOND AMENDMENT This LENDER JOINDER AGREEMENT AND SECOND AMENDMENT (this “Agreement”), dated as of November 1, 2019 and effective as of the Effective Date (as defined below), is entered into by and among US Ecology Holdings, Inc. (f/k/a U

November 1, 2019 EX-10.2

Amended and Restated US Ecology, Inc. Omnibus Incentive Plan, effective as of November 1, 2019

Exhibit 10.2 AMENDED AND RESTATED US ECOLOGY, INC. OMNIBUS INCENTIVE PLAN Section 1. Purpose of the Plan. The purpose of the Amended and Restated US Ecology, Inc. Omnibus Incentive Plan (the “Plan”) is to assist the Company and its Subsidiaries in attracting, motivating and retaining valued Employees, Consultants and Non-Employee Directors by offering them a greater stake in the Company’s success

November 1, 2019 EX-4.1

Assignment, Assumption and Amendment to the Warrant Agreement, dated as of November 1, 2019, by and between US Ecology, Inc., American Stock Transfer & Trust Company, LLC, NRC Group Holdings Corp. and Continental Stock Transfer & Trust Company.

Exhibit 4.1 EXECUTION VERSION ASSIGNMENT, ASSUMPTION AND AMENDMENT TO THE WARRANT AGREEMENT Dated as of November 1, 2019 THIS ASSIGNMENT, ASSUMPTION AND AMENDMENT TO THE WARRANT AGREEMENT (this “Agreement”), dated as of November 1, 2019, is by and between US Ecology Parent, Inc., a Delaware corporation (the “Company”), and American Stock Transfer & Trust Company, LLC, as warrant agent (the “Warran

September 19, 2019 424B3

MERGER PROPOSAL—YOUR VOTE IS VERY IMPORTANT

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents Filed Pursuant to Rule 424(b)(3) Registration No.

September 17, 2019 CORRESP

US ECOLOGY PARENT, INC. 101 S. Capitol Boulevard, Suite 1000 Boise, ID 83702 (208) 331-8400 September 17, 2019

US ECOLOGY PARENT, INC. 101 S. Capitol Boulevard, Suite 1000 Boise, ID 83702 (208) 331-8400 September 17, 2019 VIA EDGAR U.S. Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.E. Washington, DC 20549 Attn: Kate McHale, Esq. Re: US Ecology Parent, Inc. Registration Statement on Form S-4 File Number 333-232930 Ladies and Gentlemen: Pursuant to Rule 461 under the Secu

September 12, 2019 EX-15.1

Letter re: Unaudited Interim Financial Statements.

Exhibit 15.1 September 11, 2019 U.S. Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited interim financial information of U.S. Ecology, Inc. and subsidiaries for the three-month periods ended March 31, 2019 and 2018, and have issued our report dated May 6

September 12, 2019 EX-99.3

Consent of BofA Securities, Inc.

Exhibit 99.3 Consent of BofA Securities, Inc. The Board of Directors US Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 The Board of Directors: We hereby consent to the inclusion of our opinion letter, dated June 23, 2019, to the Board of Directors of US Ecology, Inc. (“US Ecology”) as Annex H to, and reference to such opinion letter under the headings “Summary—Opinion of US Ecol

September 12, 2019 EX-99.4

Consent of Evercore, Inc.

Exhibit 99.4 CONSENT OF EVERCORE GROUP L.L.C. September 11, 2019 The Board of Directors NRC Group Holdings Corp. 952 Echo Lane, Suite 460 Houston, Texas 77024 Members of the Board of Directors: We hereby consent to the inclusion of our opinion letter, dated June 23, 2019, to the Board of Directors of NRC Group Holdings Corp. (the “Company”) as Annex I to, and the references thereto under the capti

September 12, 2019 S-4/A

As filed with the Securities and Exchange Commission on September 11, 2019

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on September 11, 2019 Registration No.

September 3, 2019 EX-4.1

Form of Warrant Agreement between American Stock Transfer & Trust Company, LLC and the Registrant.

Exhibit 4.1 FORM OF US ECOLOGY PARENT, INC. AND AMERICAN STOCK TRANSFER & TRUST COMPANY, LLC WARRANT AGREEMENT Dated as of [?], 2019 THIS WARRANT AGREEMENT (this ?Agreement?), dated as of [?], 2019, is by and between US Ecology Parent, Inc., a Delaware corporation (the ?Company?), and American Stock Transfer & Trust Company, LLC, as warrant agent (the ?Warrant Agent,? also referred to herein as th

September 3, 2019 S-4/A

As filed with the Securities and Exchange Commission on August 30, 2019

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on August 30, 2019 Registration No.

September 3, 2019 EX-99.1

Form of Proxy Card of US Ecology, Inc.

Exhibit 99.1 VOTE BY INTERNET - www.proxyvote.com Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 P.M. ET on [ ]. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS If you would l

September 3, 2019 EX-99.2

Form of Proxy Card of NRC Group Holdings Corp.

Exhibit 99.2 VOTE BY INTERNET - www.proxyvote.com Use the Internet to transmit your voting instructions and for electronic delivery of information. Vote by 11:59 P.M. ET on [TBD]. Have your proxy card in hand when you access the web site and follow the instructions to obtain your records and to create an electronic voting instruction form. ELECTRONIC DELIVERY OF FUTURE PROXY MATERIALS If you would

September 3, 2019 EX-99.4

Consent of Evercore, Inc.

Exhibit 99.4 CONSENT OF EVERCORE GROUP L.L.C. August 30, 2019 The Board of Directors NRC Group Holdings Corp. 952 Echo Lane, Suite 460 Houston, Texas 77024 Members of the Board of Directors: We hereby consent to the inclusion of our opinion letter, dated June 23, 2019, to the Board of Directors of NRC Group Holdings Corp. (the ?Company?) as Annex I to, and the references thereto under the captions

September 3, 2019 EX-15.1

Letter re: Unaudited Interim Financial Statements.

Exhibit 15.1 August 30, 2019 U.S. Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited interim financial information of U.S. Ecology, Inc. and subsidiaries for the three-month periods ended March 31, 2019 and 2018, and have issued our report dated May 6, 2

September 3, 2019 EX-99.3

Consent of BofA Securities, Inc.

Exhibit 99.3 Consent of BofA Securities, Inc. The Board of Directors US Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 The Board of Directors: We hereby consent to the inclusion of our opinion letter, dated June 23, 2019, to the Board of Directors of US Ecology, Inc. (?US Ecology?) as Annex H to, and reference to such opinion letter under the headings ?Summary?Opinion of US Ecol

August 30, 2019 CORRESP

* * * * *

Cira Centre 2929 Arch Street Philadelphia, PA 19104 +1 215 994 4000 Main +1 215 994 2222 Fax www.

August 1, 2019 EX-99.8

Consent of Daniel Fox to be named as a director of US Ecology Parent, Inc. upon the completion of the Mergers.

Exhibit 99.8 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to the inclusion of my name in the Registration Statement on Form S-4 of US Ecology Parent, Inc. (the ?Company?) filed with the Securities and Exchange Commission, and all amendments (including post-effective amendments) thereto (the ?Registration Stat

August 1, 2019 EX-3.2

Bylaws of US Ecology Parent, Inc., as currently in effect.

Exhibit 3.2 BYLAWS OF US ECOLOGY PARENT, INC. (THE ?CORPORATION?) ARTICLE I STOCKHOLDERS 1.1 Meetings. 1.1.1 Place. Meetings of the stockholders shall be held at such place as may be designated by the board of directors of the Corporation (the ?Board?). 1.1.2 Annual Meeting. An annual meeting of the stockholders for the election of directors and for other business shall be held on such date and at

August 1, 2019 EX-99.9

Consent of Katina Dorton to be named as a director of US Ecology Parent, Inc. upon the completion of the Mergers.

Exhibit 99.9 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to the inclusion of my name in the Registration Statement on Form S-4 of US Ecology Parent, Inc. (the ?Company?) filed with the Securities and Exchange Commission, and all amendments (including post-effective amendments) thereto (the ?Registration Stat

August 1, 2019 EX-99.4

Consent of Evercore, Inc.

Exhibit 99.4 CONSENT OF EVERCORE GROUP L.L.C. July 31, 2019 The Board of Directors NRC Group Holdings Corp. 952 Echo Lane, Suite 460 Houston, Texas 77024 Members of the Board of Directors: We hereby consent to the inclusion of our opinion letter, dated June 23, 2019, to the Board of Directors of NRC Group Holdings Corp. (the “Company”) as Annex I to, and the references thereto under the captions “

August 1, 2019 EX-15.1

Letter re: Unaudited Interim Financial Statements.

Exhibit 15.1 July 31, 2019 U.S. Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 We have reviewed, in accordance with the standards of the Public Company Accounting Oversight Board (United States), the unaudited interim financial information of U.S. Ecology, Inc. and subsidiaries for the three-month periods ended March 31, 2019 and 2018, and have issued our report dated May 6, 201

August 1, 2019 EX-99.6

Consent of Stephen A. Romano to be named as a director of US Ecology Parent, Inc. upon the completion of the Mergers.

Exhibit 99.6 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to the inclusion of my name in the Registration Statement on Form S-4 of US Ecology Parent, Inc. (the “Company”) filed with the Securities and Exchange Commission, and all amendments (including post-effective amendments) thereto (the “Registration Stat

August 1, 2019 EX-99.10

Consent of Glenn A. Eisenberg to be named as a director of US Ecology Parent, Inc. upon the completion of the Mergers.

Exhibit 99.10 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to the inclusion of my name in the Registration Statement on Form S-4 of US Ecology Parent, Inc. (the ?Company?) filed with the Securities and Exchange Commission, and all amendments (including post-effective amendments) thereto (the ?Registration Sta

August 1, 2019 EX-99.7

Consent of Joe F. Colvin to be named as a director of US Ecology Parent, Inc. upon the completion of the Mergers.

Exhibit 99.7 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to the inclusion of my name in the Registration Statement on Form S-4 of US Ecology Parent, Inc. (the “Company”) filed with the Securities and Exchange Commission, and all amendments (including post-effective amendments) thereto (the “Registration Stat

August 1, 2019 EX-99.3

Consent of BofA Securities, Inc.

Exhibit 99.3 Consent of BofA Securities, Inc. The Board of Directors US Ecology, Inc. 101 S. Capitol Blvd., Suite 1000 Boise, Idaho 83702 The Board of Directors: We hereby consent to the inclusion of our opinion letter, dated June 23, 2019, to the Board of Directors of US Ecology, Inc. (“US Ecology”) as Annex H to, and reference to such opinion letter under the headings “Summary—Opinion of US Ecol

August 1, 2019 S-4

Power of Attorney.

Use these links to rapidly review the document TABLE OF CONTENTS TABLE OF CONTENTS TABLE OF CONTENTS Table of Contents As filed with the Securities and Exchange Commission on July 31, 2019 Registration No.

August 1, 2019 EX-99.12

Consent of Ronald C. Keating to be named as a director of US Ecology Parent, Inc. upon the completion of the Mergers.

Exhibit 99.12 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to the inclusion of my name in the Registration Statement on Form S-4 of US Ecology Parent, Inc. (the ?Company?) filed with the Securities and Exchange Commission, and all amendments (including post-effective amendments) thereto (the ?Registration Sta

August 1, 2019 EX-99.11

Consent of Melanie Steiner to be named as a director of US Ecology Parent, Inc. upon the completion of the Mergers.

Exhibit 99.11 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to the inclusion of my name in the Registration Statement on Form S-4 of US Ecology Parent, Inc. (the ?Company?) filed with the Securities and Exchange Commission, and all amendments (including post-effective amendments) thereto (the ?Registration Sta

August 1, 2019 EX-99.5

Consent of John T. Sahlberg to be named as a director of US Ecology Parent, Inc. upon the completion of the Mergers.

Exhibit 99.5 CONSENT OF PROSPECTIVE DIRECTOR In accordance with Rule 438 promulgated under the Securities Act of 1933, as amended, I hereby consent to the inclusion of my name in the Registration Statement on Form S-4 of US Ecology Parent, Inc. (the “Company”) filed with the Securities and Exchange Commission, and all amendments (including post-effective amendments) thereto (the “Registration Stat

August 1, 2019 EX-3.1

Certificate of Incorporation of US Ecology Parent, Inc., as currently in effect.

Exhibit 3.1 CERTIFICATE OF INCORPORATION OF US ECOLOGY PARENT, INC. 1. Name. The name of the Corporation is US Ecology Parent, Inc. 2. Registered Office and Agent. The address of the Corporation?s registered office in the State of Delaware is Corporation Service Company, 251 Little Falls Drive, Wilmington, New Castle County, Delaware 19808. The name of the Corporation?s registered agent at such ad

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