RMGCU / RMG Acquisition Corp III - Units (1 Ord Share Class A & 1/5 War) - SEC फाइलिंग, वार्षिक रिपोर्ट, प्रॉक्सी स्टेटमेंट

आरएमजी एक्विजिशन कॉर्प III - इकाइयाँ (1 ऑर्ड शेयर क्लास ए और 1/5 वार)
US ˙ NASDAQ ˙ KYG760881147
यह प्रतीक अब सक्रिय नहीं है

मूलभूत आँकड़े
CIK 1838108
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 RMG Acquisition Corp III - Units (1 Ord Share Class A & 1/5 War)
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।
July 28, 2025 15-12G

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Commission File Number: 001-40013 RMG ACQUISITION CORP. III (Exact name of registrant as specified i

July 9, 2025 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 9, 2025 RMG ACQUISITION CORP

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 9, 2025 RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorporation) (Commi

July 9, 2025 EX-99.1

RMG Acquisition Corp. III Announces Liquidation

Exhibit 99.1 RMG Acquisition Corp. III Announces Liquidation New York, NY – July 9, 2025 - RMG Acquisition Corp. III (the “Company”) today announced that, because the Company will not consummate an initial business combination within the time period required by its Fifth Amended and Restated Memorandum and Articles of Association, the Company intends to redeem all of the outstanding shares of Clas

November 14, 2024 SC 13G/A

RMGC / RMG Acquisition Corp. III / Walleye Capital LLC Passive Investment

SC 13G/A 1 sc13gano1rmgcf.htm SC 13G/A 1 ef20035629sc13ga.htm SC 13G/A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* RMG Acquisition Corp. III (Name of Issuer) Class A Ordinary Shares, par value $0.0001 per share (Title of Class of Securities) G76088106 (CUSIP Number) September 30, 2024 (Date of Event

October 18, 2024 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 17, 2024 (October 15, 2024) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction o

October 18, 2024 EX-3.1

THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES FIFTH AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED EFFECTIVE ON 15 OCTOBER 2024) THE COMPANIE

Exhibit 3.1 THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES FIFTH AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION OF RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED EFFECTIVE ON 15 OCTOBER 2024) THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES FIFTH AMENDED AND RESTATED MEMORANDUM OF ASSOCIATION OF RMG ACQUISIT

October 8, 2024 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. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defi

October 7, 2024 DEF 14A

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Information Required in Proxy Statement Schedule 14A Information 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

September 18, 2024 PRE 14A

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Information Required in Proxy Statement Schedule 14A Information 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

June 28, 2024 EX-99.25

EX-99.25

Delisting Determination, The Nasdaq Stock Market, LLC, June 28, 2024, RMG Acquisition Corp.

May 29, 2024 RW

May 29, 2024

May 29, 2024 Via EDGAR Transmission United States Securities and Exchange Commission Division of Corporation Finance 100 F Street, N.

May 9, 2024 8-K

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): May 9, 2024 (May 3, 2024) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorpor

April 22, 2024 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): April 22, 2024 RMG ACQUISITION CO

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 22, 2024 RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorporation) (Com

April 22, 2024 EX-99.1

RMG Acquisition Corp. III Announces Delisting from Nasdaq

Exhibit 99.1 RMG Acquisition Corp. III Announces Delisting from Nasdaq New York, NY - April 22, 2024 - RMG Acquisition Corp. III (the “Company”) issued a press release on April 19, 2024 announcing that the Company was in the process of appealing the previously-reported delisting determination and that the Company expected its securities would remain listed on The Nasdaq Capital Market during the a

April 19, 2024 EX-99.1

RMG Acquisition Corp. III Announces Cancellation of Dissolution

Exhibit 99.1 RMG Acquisition Corp. III Announces Cancellation of Dissolution New York, NY - April 19, 2024 - RMG Acquisition Corp. III (the “Company”) issued a press release on April 8, 2024 (the “Prior Announcement”) announcing that the Company would not consummate an initial business combination by the date required by its Fourth Amended and Restated Memorandum and Articles of Association (the “

April 19, 2024 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, 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): April 19, 2024 RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorporation) (Com

April 9, 2024 EX-99.1

RMG Acquisition Corp. III Announces Liquidation

Exhibit 99.1 RMG Acquisition Corp. III Announces Liquidation New York, NY - April 8, 2024 - RMG Acquisition Corp. III (the “Company”) today announced that, because the Company will not consummate an initial business combination within the time period required by its Fourth Amended and Restated Memorandum and Articles of Association, the Company intends to dissolve and liquidate, effective as of th

April 9, 2024 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 8, 2024 RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorporation) (Comm

April 4, 2024 425

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 4, 2024 (April 1, 2024) RMG

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 4, 2024 (April 1, 2024) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of inco

April 4, 2024 8-K

Termination of a Material Definitive Agreement

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 4, 2024 (April 1, 2024) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of inco

February 14, 2024 SC 13G

RMG ACQUISITION CORP III -A SPECIAL PURPOSE ACQUISITION COMPANIES / Walleye Capital LLC - SC 13G Passive Investment

SC 13G 1 ef20020237sc13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* RMG Acquisition Corp. III (Name of Issuer) Class A Ordinary Shares, par value $0.0001 per share (Title of Class of Securities) G76088106 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statem

February 14, 2024 SC 13G/A

RMG ACQUISITION CORP III -A SPECIAL PURPOSE ACQUISITION COMPANIES / PROPPER KERRY Passive Investment

SC 13G/A 1 formsc13ga.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* RMG Acquisition Corp. III (Name of Issuer) Class A Ordinary Shares, par value $0.0001 (Title of Class of Securities) G76088106 (CUSIP Number) December 31, 2023 (Date of Event which Requires Filing of this Statement) Check the ap

February 14, 2024 SC 13G

RMG ACQUISITION CORP III -A SPECIAL PURPOSE ACQUISITION COMPANIES / Meteora Capital, LLC Passive Investment

SC 13G 1 meteorarmgc123123.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, DC 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No. )* RMG Acquisition Corp. II (Name of Issuer) Class A Ordinary Shares included as part of the units (Title of Class of Securities) G76088106 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of this Statement)

February 12, 2024 SC 13G/A

RMG ACQUISITION CORP III -A SPECIAL PURPOSE ACQUISITION COMPANIES / ARISTEIA CAPITAL LLC Passive Investment

SC 13G/A 1 formrmgacquisitionsc13ga.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 SCHEDULE 13G (Rule 13d-102) Under the Securities Exchange Act of 1934 (Amendment No. 2) RMG Acquisition Corp. III (Name of Issuer) Class A ordinary shares, par value $0.0001 per share (Title of Class of Securities) G76088106 (CUSIP Number) December 31, 2023 (Date of Event Which Requires

February 9, 2024 EX-3.1

THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES FOURTH AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED EFFECTIVE ON 7 FEBRUARY 2024) THE COMPANI

Exhibit 3.1 THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES   FOURTH AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION   OF   RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED EFFECTIVE ON 7 FEBRUARY 2024) THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES FOURTH AMENDED AND RESTATED MEMORANDUM OF ASSOCIATION OF RMG

February 9, 2024 EX-3.1

THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES FOURTH AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED EFFECTIVE ON 7 FEBRUARY 2024) THE COMPANI

Exhibit 3.1 THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES   FOURTH AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION   OF   RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED EFFECTIVE ON 7 FEBRUARY 2024) THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES FOURTH AMENDED AND RESTATED MEMORANDUM OF ASSOCIATION OF RMG

February 9, 2024 8-K

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 9, 2024 (February 5, 2024) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction o

February 9, 2024 425

UNITED STATES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): February 9, 2024 (February 5, 2024) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction o

January 31, 2024 DEF 14A

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

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A   Information Required in Proxy Statement Schedule 14A Information   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,

January 18, 2024 PRE 14A

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

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A   Information Required in Proxy Statement Schedule 14A Information   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, f

December 27, 2023 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

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 27, 2023 (December 20, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction

December 18, 2023 EX-99.5

Consent to be Named as a Director

Exhibit 99.5 Consent to be Named as a Director In connection with the filing by RMG Acquisition Corp. III of the Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named in the Registration Statement and any and all amendments and s

December 18, 2023 S-4/A

As filed with the Securities and Exchange Commission on December 18, 2023

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on December 18, 2023 Registration No.

December 18, 2023 EX-10.22

BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED NON-RESIDENTIAL LEASE AGRE

Exhibit 10.22 CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO REGULATION S-K, ITEM 601(B)(10) BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO ITEM 601(A)(6) OF REGULATION S-K. [***] INDICATES THAT INFORMATION HAS

December 18, 2023 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): December 18, 2023 (December 15, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction

December 18, 2023 EX-99.8

Consent to be Named as a Director

Exhibit 99.8 Consent to be Named as a Director In connection with the filing by RMG Acquisition Corp. III of the Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named in the Registration Statement and any and all amendments and s

December 18, 2023 425

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 18, 2023 (December 15, 2

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 18, 2023 (December 15, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction

December 18, 2023 EX-99.1

Consent to be Named as a Director

Exhibit 99.1 Consent to be Named as a Director In connection with the filing by RMG Acquisition Corp. III of the Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named in the Registration Statement and any and all amendments and s

December 18, 2023 EX-21.1

SUBSIDIARIES OF H2B2 ELECTROLYSIS TECHNOLOGIES, INC.

Exhibit 21.1 SUBSIDIARIES OF H2B2 ELECTROLYSIS TECHNOLOGIES, INC. Name of Subsidiary Jurisdiction of Organization H2B2 Electrolysis Technologies, S.L.U. Spain H2B2 Corp, S.L.U. Spain H2B2 O&M, S.L.U. Spain Green H2, LLC USA SoHyCal LLC USA H2B2 QOF, LLC USA H2B2 USA, LLC USA H2B2 Electrolysis Technologies UK, Ltd England and Wales Flitecho, S.L. Uruguay GreenH Electrolysis Private Ltd India H2V2 M

December 18, 2023 EX-99.4

Consent to be Named as a Director

Exhibit 99.4 Consent to be Named as a Director In connection with the filing by RMG Acquisition Corp. III of the Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named in the Registration Statement and any and all amendments and s

December 18, 2023 EX-2.1

AMENDMENT NO. 1 TO THE AGREEMENT AND PLAN OF MERGER

Exhibit 2.1 AMENDMENT NO. 1 TO THE AGREEMENT AND PLAN OF MERGER THIS AMENDMENT NO. 1, dated as of December 15, 2023 (this “Amendment”), to the Agreement and Plan of Merger, dated as of May 9, 2023 (the “Merger Agreement”), by and between RMG Acquisition Corp. III, a Cayman Islands exempted company limited by shares (which shall de-register as an exempted company incorporated in the Cayman Islands

December 18, 2023 EX-99.2

Consent to be Named as a Director

Exhibit 99.2 Consent to be Named as a Director In connection with the filing by RMG Acquisition Corp. III of the Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named in the Registration Statement and any and all amendments and s

December 18, 2023 EX-10.28

PURSUANT TO REGULATION S-K, ITEM 601(B)(10) BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS REGULATION S-K. [***] INDICATES

Exhibit 10.28 CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO REGULATION S-K, ITEM 601(B)(10) BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO ITEM 601(A)(6) OF REGULATION S-K. [***] INDICATES THAT INFORMATION HAS

December 18, 2023 EX-99.7

Consent to be Named as a Director

Exhibit 99.7 Consent to be Named as a Director In connection with the filing by RMG Acquisition Corp. III of the Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named in the Registration Statement and any and all amendments and s

December 18, 2023 EX-99.3

Consent to be Named as a Director

Exhibit 99.3 Consent to be Named as a Director In connection with the filing by RMG Acquisition Corp. III of the Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named in the Registration Statement and any and all amendments and s

December 18, 2023 EX-2.1

AMENDMENT NO. 1 TO THE AGREEMENT AND PLAN OF MERGER

Exhibit 2.1 AMENDMENT NO. 1 TO THE AGREEMENT AND PLAN OF MERGER THIS AMENDMENT NO. 1, dated as of December 15, 2023 (this “Amendment”), to the Agreement and Plan of Merger, dated as of May 9, 2023 (the “Merger Agreement”), by and between RMG Acquisition Corp. III, a Cayman Islands exempted company limited by shares (which shall de-register as an exempted company incorporated in the Cayman Islands

December 18, 2023 EX-99.6

Consent to be Named as a Director

Exhibit 99.6 Consent to be Named as a Director In connection with the filing by RMG Acquisition Corp. III of the Registration Statement on Form S-4 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named in the Registration Statement and any and all amendments and s

December 14, 2023 425

The Port Authority of Seville initiates the processing of the concession for a hydrogen electrolyzer manufacturing facility

Filed by RMG Acquisition Corp. III pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: H2B2 Electrolysis Technologies, Inc. Date: December 14, 2023 The Port Authority of Seville initiates the processing of the concession for a hydrogen electrolyzer manufacturing facility H2B2 has applied for the o

December 12, 2023 425

GreenH Electrolysis entered into a contract to build a Hydrogen production and Refueling station to power India’s first Hydrogen train.

Filed by RMG Acquisition Corp. III pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: H2B2 Electrolysis Technologies, Inc. Date: December 12, 2023 GreenH Electrolysis entered into a contract to build a Hydrogen production and Refueling station to power India’s first Hydrogen train. • Signed an EP

December 7, 2023 425

Transcript of Plug Symposium Session: Plug's Electrolyzer Offering Value Proposition

Filed by RMG Acquisition Corp. III pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: H2B2 Electrolysis Technologies, Inc. Date: October 11, 2023 Transcript of Plug Symposium Session: Plug's Electrolyzer Offering Value Proposition SANJAY SHRESTHA: Good afternoon again. So, this session actually i

November 20, 2023 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to RMG ACQUISITION CORP. III (Exact name o

November 14, 2023 S-4/A

As filed with the Securities and Exchange Commission on November 13, 2023

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on November 13, 2023 Registration No.

November 13, 2023 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: September 30, 2023 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q For the Transition Period Ended: Read Instruction (on back page) Before Preparing Form.

November 7, 2023 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

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 7, 2023 (November 1, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction o

November 3, 2023 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 3, 2023 RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorporation) (C

November 3, 2023 EX-99.1

November 2023 H2B2 Electrolysis Technologies Investor Presentation Disclaimer This presentation has been prepared for use by H2B2 Electrolysis Technologies, Inc. (together with its subsidiaries and affiliates, the “Company”) and RMG Acquisition Corp.

Exhibit 99.1 November 2023 H2B2 Electrolysis Technologies Investor Presentation Disclaimer This presentation has been prepared for use by H2B2 Electrolysis Technologies, Inc. (together with its subsidiaries and affiliates, the “Company”) and RMG Acquisition Corp. III (“RMG III”) in connection with their proposed business combination (the “Business Combination”). This presentation is intended to pr

November 3, 2023 EX-99.1

November 2023 H2B2 Electrolysis Technologies Investor Presentation Disclaimer This presentation has been prepared for use by H2B2 Electrolysis Technologies, Inc. (together with its subsidiaries and affiliates, the “Company”) and RMG Acquisition Corp.

Exhibit 99.1 November 2023 H2B2 Electrolysis Technologies Investor Presentation Disclaimer This presentation has been prepared for use by H2B2 Electrolysis Technologies, Inc. (together with its subsidiaries and affiliates, the “Company”) and RMG Acquisition Corp. III (“RMG III”) in connection with their proposed business combination (the “Business Combination”). This presentation is intended to pr

November 3, 2023 425

UNITED STATES

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): November 3, 2023 RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorporation) (C

August 21, 2023 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to RMG ACQUISITION CORP. III (Exact name of reg

August 15, 2023 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: June 30, 2023 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q For the Transition Period Ended: Read Instruction (on back page) Before Preparing Form.

August 14, 2023 EX-10.11

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMM

Exhibit 10.11 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT This Common Stock Option Agreement

August 14, 2023 EX-10.26

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED.

Exhibit 10.26 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. ****SIMPLE COPY**** ÍÑIGO CASLA URIARTE Notary Paseo de la Castellana, No. 139 - 6°- Derecha Tel. 91 579 00 84 Fax. 91 570 47 50 28046 MADRID PUBLIC DEED OF SALE AND PUR

August 14, 2023 EX-2.2

PLAN OF DOMESTICATION

Exhibit 2.2 PLAN OF DOMESTICATION This PLAN OF DOMESTICATION (the “Plan of Domestication”) is made on , , and sets forth the terms pursuant to which RMG Acquisition Corp. III, a Cayman Islands exempted company limited by shares (“RMG”), shall de-register as an exempted company incorporated in the Cayman Islands by way of continuation to the State of Delaware and effect a domestication and become a

August 14, 2023 EX-10.16

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMM

Exhibit 10.16 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT This Common Stock Option Agreement

August 14, 2023 EX-10.13

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. H2B2 Electrolysis Technologies Inc.

Exhibit 10.13 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. H2B2 Electrolysis Technologies Inc. 9 May 2023 Anselmo Andrade Fernández de Mesa [***] Dear Anselmo: This letter agreement (“Agreement”) will confirm and formalize our a

August 14, 2023 EX-10.21

H2B2 Electrolysis Technologies Inc.

Exhibit 10.21 Execution version H2B2 Electrolysis Technologies Inc. December 15, 2022 Mr. Antonio Vázquez Romero Re: Service as Non-Executive Chairman of the Board Dear Mr. Antonio Vázquez Romero: This letter agreement (the “Agreement”) sets forth certain terms and conditions of your service as a member (“Director”) of the Board of Directors (the “Board”) of H2B2 Electrolysis Technologies Inc. (th

August 14, 2023 EX-10.10

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. INDEFINITE EMPLOYMENT CONTRACT

Exhibit 10.10 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. INDEFINITE EMPLOYMENT CONTRACT COMPANY DATA CIF/NIF/NIE [***] Mrs. ARESTI ESCRIVA DE ROMANI, NIF/NIE [***] AS (1) DIRECTOR COMPANY NAME H2B2 ELECTROLYSIS TECHNOLOGIES, S

August 14, 2023 EX-10.25

SUPPLY AGREEMENT

Exhibit 10.25 SUPPLY AGREEMENT This Supply Agreement (the "Agreement") is entered into this 19th day of June, 2020 (the "Effective Date") by and among Giner ELX, Inc., a Delaware corporation ("Giner") and H2B2 Electrolysis Technologies, Inc., a Delaware corporation ("H2B2")(Giner and H282 may each be referred to as a "party" and collectively as the "parties" Background: Giner manufactures and sell

August 14, 2023 EX-10.23

BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED SUBLEASE AGREEMENT (Hydrog

Exhibit 10.23 CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO REGULATION S-K, ITEM 601(B)(10) BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO ITEM 601(A)(6) OF REGULATION S-K. [***] INDICATES THAT INFORMATION HAS

August 14, 2023 EX-10.17

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. INDEFINITE EMPLOYMENT CONTRACT

Exhibit 10.17 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. INDEFINITE EMPLOYMENT CONTRACT COMPANY DATA CIF/NIF/NIE [***] Mrs. ARESTI ESCRIVA DE ROMANI, NIF/NIE [***] AS (1) DIRECTOR COMPANY NAME H2B2 ELECTROLYSIS TECHNOLOGIES, S

August 14, 2023 EX-10.12

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED.

Exhibit 10.12 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. Amendment of the contract to establish the stipulations arising from the status of shareholder in the company H2B2 Electrolysis Technologies, Inc. In Dos Hermanas, on 1

August 14, 2023 EX-4.6

CERTIFICATE OF DOMESTICATION RMG ACQUISITION CORP. III RMG ACQUISITION CORP. III, INC. Pursuant to Sections 103 and 388 of the General Corporation Law of the State of Delaware

Exhibit 4.6 CERTIFICATE OF DOMESTICATION DOMESTICATING RMG ACQUISITION CORP. III AS RMG ACQUISITION CORP. III, INC. Pursuant to Sections 103 and 388 of the General Corporation Law of the State of Delaware RMG Acquisition Corp. III, a Cayman Islands exempted company limited by shares (the “Corporation”), does hereby certify to the following facts relating to the domestication of the Corporation fro

August 14, 2023 EX-10.20

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMM

Exhibit 10.20 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT H2B2 ELECTROLYSIS TECHNOLOGIES, INC. COMMON STOCK OPTION AGREEMENT This Common Stock Option Agreement

August 14, 2023 EX-10.27

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED.

Exhibit 10.27 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. DEED RAISING TO PUBLIC STATUS THE “LOAN AGREEMENT” - NUMBER ONE THOUSAND FOUR HUNDRED AND EIGHTY-THREE (1,483) In Madrid, on May thirtieth, two thousand and twenty-three

August 14, 2023 EX-10.14

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. SERVICE AGREEMENT AS SOLE DIRECTOR

Exhibit 10.14 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. SERVICE AGREEMENT AS SOLE DIRECTOR In Madrid, on 9 May 2023 THE PARTIES (1) H2B2 Corp, S.L., a limited liability company incorporated, with registered office at [***], a

August 14, 2023 EX-10.22

BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED NON-RESIDENTIAL LEASE AGRE

Exhibit 10.22 CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO REGULATION S-K, ITEM 601(B)(10) BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO ITEM 601(A)(6) OF REGULATION S-K. [***] INDICATES THAT INFORMATION HAS

August 14, 2023 EX-10.18

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. 7 January 2023 SERVICE AGREEMENT H2B2 ELECTROLYSIS TECHNOLOGIES, S.L. MR. FELIPE BENJUMEA LLORENTE TABLE OF

Exhibit 10.18 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. 7 January 2023 SERVICE AGREEMENT BETWEEN H2B2 ELECTROLYSIS TECHNOLOGIES, S.L. AND MR. FELIPE BENJUMEA LLORENTE TABLE OF CONTENTS Clause Page 1. OBJECT AND NATURE 2 2. PR

August 14, 2023 EX-10.15

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED.

Exhibit 10.15 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. INDEFINITE EMPLOYMENT CONTRACT COMPANY DATA CIF/NIF/NIE [***] D./Ms. BREY SANCHEZ, JOSE JAVIER NIF/NIE [***] AS (1) DIRECTOR COMPANY NAME OR COMPANY NAME H2B2 ELECTROLYS

August 14, 2023 S-4/A

As filed with the Securities and Exchange Commission on August 14, 2023

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on August 14, 2023 Registration No.

August 14, 2023 EX-10.24

BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED SOLAR ENERGY SYSTEM SUBLEA

Exhibit 10.24 CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO REGULATION S-K, ITEM 601(B)(10) BECAUSE IT IS BOTH NOT MATERIAL AND WOULD LIKELY CAUSE COMPETITIVE HARM TO THE REGISTRANT IF PUBLICLY DISCLOSED. IN ADDITION, CERTAIN PERSONALLY IDENTIFIABLE INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT PURSUANT TO ITEM 601(A)(6) OF REGULATION S-K. [***] INDICATES THAT INFORMATION HAS

August 14, 2023 EX-10.19

IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. INDEFINITE EMPLOYMENT CONTRACT

Exhibit 10.19 IN ACCORDANCE WITH ITEM 601(A)(6) OF REGULATION S-K, CERTAIN INFORMATION HAS BEEN OMITTED FROM THIS EXHIBIT BECAUSE IT CONTAINS PERSONALLY IDENTIFIABLE INFORMATION. [***] INDICATES THAT INFORMATION HAS BEEN REDACTED. INDEFINITE EMPLOYMENT CONTRACT COMPANY DATA CIF/NIF/NIE [***] Mrs. ARESTI ESCRIVA DE ROMANI, NIF/NIE [***] AS (1) DIRECTOR COMPANY NAME H2B2 ELECTROLYSIS TECHNOLOGIES, S

August 7, 2023 425

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 4, 2023 (August 4, 2023) R

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 4, 2023 (August 4, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of in

August 7, 2023 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): August 4, 2023 (August 4, 2023) R

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 4, 2023 (August 4, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of in

August 7, 2023 EX-3.1

THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES THIRD AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED AUGUST 4, 2023 AND EFFECTIVE ON AUGUST 4,

Exhibit 3.1 THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES   THIRD AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION   OF   RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED AUGUST 4, 2023 AND EFFECTIVE ON AUGUST 4, 2023) THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES   THIRD AMENDED AND RESTATED MEMORANDUM OF A

August 7, 2023 EX-3.1

THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES THIRD AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED AUGUST 4, 2023 AND EFFECTIVE ON AUGUST 4,

Exhibit 3.1 THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES   THIRD AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION   OF   RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED AUGUST 4, 2023 AND EFFECTIVE ON AUGUST 4, 2023) THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES   THIRD AMENDED AND RESTATED MEMORANDUM OF A

July 27, 2023 DEF 14A

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

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Information Required in Proxy Statement Schedule 14A Information   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, fo

July 21, 2023 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

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

July 20, 2023 CORRESP

* * *

811 Main Street, Suite 3700 Houston, TX 77002 Tel: +1.713.546.5400 Fax: +1.713.546.5401 www.lw.com FIRM / AFFILIATE OFFICES Austin Milan Beijing Munich Boston New York Brussels Orange County Century City Paris July 20, 2023 Chicago Riyadh Dubai San Diego Düsseldorf San Francisco Frankfurt Seoul Hamburg Shanghai Hong Kong Silicon Valley Houston Singapore London Tel Aviv Los Angeles Tokyo Madrid Was

July 14, 2023 PRE 14A

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

TABLE OF CONTENTS UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Information Required in Proxy Statement Schedule 14A Information   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

July 6, 2023 S-4

As filed with the Securities and Exchange Commission on July 6, 2023

TABLE OF CONTENTS As filed with the Securities and Exchange Commission on July 6, 2023 Registration No.

July 6, 2023 EX-FILING FEES

CALCULATION OF FILING FEE TABLE Form S-4 (Form Type) RMG ACQUISITION CORP. III (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered and Carry Forward Securities

Exhibit 107 CALCULATION OF FILING FEE TABLE Form S-4 (Form Type) RMG ACQUISITION CORP.

June 26, 2023 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 26, 2023 (June 20, 2023) RMG

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, 2023 (June 20, 2023) RMG ACQUISITION CORP. III (Exact Name of Registrant as Specified in Charter) Cayman Islands 001-40013 98-1574120 (State or Other Jurisdiction of Incorpor

June 26, 2023 425

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, 2023 (June 20, 2023) RMG

false0001838108NASDAQNASDAQNASDAQ00018381082023-06-202023-06-200001838108rmgc:ClassAOrdinarySharesIncludedAsPartOfTheUnitsMember2023-06-202023-06-200001838108us-gaap:CommonClassAMember2023-06-202023-06-200001838108us-gaap:RedeemablePreferredStockMember2023-06-202023-06-20 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.

June 15, 2023 425

H2B2’s SoHyCal Project in California has started hydrogen production Fresno (CA), June 15, 2023 - H2B2 Electrolysis Technologies, Inc. (“H2B2”, “Company” and “us”), a global green hydrogen development and technology company, announced that on June 1,

Filed by RMG Acquisition Corp. III pursuant to Rule 425 under the Securities Act of 1933 and deemed filed pursuant to Rule 14a-12 under the Securities Exchange Act of 1934 Subject Company: H2B2 Electrolysis Technologies, Inc. Date: June 15, 2023 H2B2’s SoHyCal Project in California has started hydrogen production Fresno (CA), June 15, 2023 - H2B2 Electrolysis Technologies, Inc. (“H2B2”, “Company”

June 12, 2023 SC 13G

RMG ACQUISITION CORP III -A SPECIAL PURPOSE ACQUISITION COMPANIES / PROPPER KERRY Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. N/A)* RMG Acquisition Corp. III (Name of Issuer) Class A Ordinary Shares, par value $0.0001 (Title of Class of Securities) G76088106 (CUSIP Number) April 25, 2023 (Date of Event which Requires Filing of this Statement) Check the appropriate box to designate

June 2, 2023 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 1, 2023 (May 25, 2023) RMG A

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 1, 2023 (May 25, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorp

June 2, 2023 EX-99.1

RMG ACQUISITION CORP. III ANNOUNCES RECEIPT OF NASDAQ LISTING DELINQUENCY LETTER AND NASDAQ LISTING COMPLIANCE DETERMINATION LETTER

Exhibit 99.1 RMG ACQUISITION CORP. III ANNOUNCES RECEIPT OF NASDAQ LISTING DELINQUENCY LETTER AND NASDAQ LISTING COMPLIANCE DETERMINATION LETTER New York, NY, June 1, 2023 – RMG Acquisition Corp. III (the “Company”) today announced that it received a delinquency notification letter from the Listing Qualifications Staff (the “Staff”) of the Nasdaq Stock Market LLC (“Nasdaq”) on May 25, 2023 due to

June 1, 2023 10-Q

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

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to RMG ACQUISITION CORP. III (Exact name of re

May 16, 2023 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ⌧ Form 10-Q ☐ Form 10-D☐ Form N-CEN ☐ Form N-CSR For Period Ended: March 31, 2023 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q For the Transition Period Ended: Read Instruction (on back page) Before Preparing Form.

May 12, 2023 EX-10.1

SPONSOR SUPPORT AGREEMENT

Exhibit 10.1 Execution Version SPONSOR SUPPORT AGREEMENT This Sponsor Support Agreement (this “Sponsor Agreement”) is dated as of May 9, 2023, by and among RMG Sponsor III LLC, a Delaware limited liability company (the “Sponsor”), RMG Acquisition Corp. III, a Cayman Islands exempted company limited by shares (which shall de-register as an exempted company incorporated in the Cayman Islands by way

May 12, 2023 EX-10.1

SPONSOR SUPPORT AGREEMENT

Exhibit 10.1 Execution Version SPONSOR SUPPORT AGREEMENT This Sponsor Support Agreement (this “Sponsor Agreement”) is dated as of May 9, 2023, by and among RMG Sponsor III LLC, a Delaware limited liability company (the “Sponsor”), RMG Acquisition Corp. III, a Cayman Islands exempted company limited by shares (which shall de-register as an exempted company incorporated in the Cayman Islands by way

May 12, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 11, 2023 (May 9, 2023) RMG AC

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 11, 2023 (May 9, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorpo

May 12, 2023 EX-99.1

H2B2 Electrolysis Technologies, Inc., a global green hydrogen platform providing bespoke integrated solutions across the hydrogen value chain, to go public on the NASDAQ via a proposed business combination with RMG Acquisition Corp. III

Exhibit 99.1 H2B2 Electrolysis Technologies, Inc., a global green hydrogen platform providing bespoke integrated solutions across the hydrogen value chain, to go public on the NASDAQ via a proposed business combination with RMG Acquisition Corp. III • H2B2 offers its customers a full suite of customized end-to-end energy solutions through its ability to design, build, own, and operate fully integr

May 12, 2023 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 11, 2023 (May 9, 2023) RMG AC

425 1 ny20009051x3425.htm 425 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 11, 2023 (May 9, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or

May 12, 2023 EX-2.1

AGREEMENT AND PLAN OF MERGER by and between RMG ACQUISITION CORP. III, H2B2 ELECTROLYSIS TECHNOLOGIES, INC. Table of Contents

Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER by and between RMG ACQUISITION CORP. III, and H2B2 ELECTROLYSIS TECHNOLOGIES, INC. Table of Contents Page ARTICLE I CERTAIN DEFINITIONS Section 1.1 Definitions 3 Section 1.2 Construction 22 Section 1.3 Knowledge 22 ARTICLE II THE MERGER; CLOSING Section 2.1 The Merger 23 Section 2.2 Effects of the Merger 23 Section 2.3 Closing; Effective T

May 12, 2023 EX-99.1

H2B2 Electrolysis Technologies, Inc., a global green hydrogen platform providing bespoke integrated solutions across the hydrogen value chain, to go public on the NASDAQ via a proposed business combination with RMG Acquisition Corp. III

Exhibit 99.1 H2B2 Electrolysis Technologies, Inc., a global green hydrogen platform providing bespoke integrated solutions across the hydrogen value chain, to go public on the NASDAQ via a proposed business combination with RMG Acquisition Corp. III • H2B2 offers its customers a full suite of customized end-to-end energy solutions through its ability to design, build, own, and operate fully integr

May 12, 2023 EX-10.2

COMPANY STOCKHOLDER SUPPORT AGREEMENT

Exhibit 10.2 Execution Version COMPANY STOCKHOLDER SUPPORT AGREEMENT This Company Stockholder Support Agreement (this “Support Agreement”) is dated as of May 9, 2023, by and among RMG Acquisition Corp. III, a Cayman Islands exempted company limited by shares (which shall de-register as an exempted company incorporated in the Cayman Islands by way of continuation to the State of Delaware and domest

May 12, 2023 EX-10.2

COMPANY STOCKHOLDER SUPPORT AGREEMENT

Exhibit 10.2 Execution Version COMPANY STOCKHOLDER SUPPORT AGREEMENT This Company Stockholder Support Agreement (this “Support Agreement”) is dated as of May 9, 2023, by and among RMG Acquisition Corp. III, a Cayman Islands exempted company limited by shares (which shall de-register as an exempted company incorporated in the Cayman Islands by way of continuation to the State of Delaware and domest

May 12, 2023 EX-2.1

AGREEMENT AND PLAN OF MERGER by and between RMG ACQUISITION CORP. III, H2B2 ELECTROLYSIS TECHNOLOGIES, INC. Table of Contents

Exhibit 2.1 Execution Version AGREEMENT AND PLAN OF MERGER by and between RMG ACQUISITION CORP. III, and H2B2 ELECTROLYSIS TECHNOLOGIES, INC. Table of Contents Page ARTICLE I CERTAIN DEFINITIONS Section 1.1 Definitions 3 Section 1.2 Construction 22 Section 1.3 Knowledge 22 ARTICLE II THE MERGER; CLOSING Section 2.1 The Merger 23 Section 2.2 Effects of the Merger 23 Section 2.3 Closing; Effective T

May 10, 2023 8-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 9, 2023 (May 9, 2023) RMG ACQ

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 9, 2023 (May 9, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorpor

May 10, 2023 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): May 9, 2023 (May 9, 2023) RMG ACQ

425 1 brhc20052707425.htm 425 false000183810800018381082023-05-092023-05-090001838108rmgc:UnitsEachConsistingOfOneClassAOrdinaryShareAndOneFifthOfOneRedeemableWarrantMember2023-05-092023-05-090001838108us-gaap:CommonClassAMember2023-05-092023-05-090001838108rmgc:RedeemableWarrantsIncludedAsPartOfTheUnitsMember2023-05-092023-05-09 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20

April 18, 2023 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 Or ☐ TRANSITION REPORT PUR

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022 Or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to To Commission File No. 001-400

March 31, 2023 NT 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): ☒ Form 10-K ☐ Form 20-F ☐ Form 11-K ☐ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: December 31, 2022 ☐ Tra

NT 10-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): ☒ Form 10-K ☐ Form 20-F ☐ Form 11-K ☐ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: December 31, 2022 ☐ Transition Report on Form 10-K ☐ Transition Report on Form 20-F ☐ Transition Report on Form 11-K ☐ Transition Report on Form 10-Q For the Transition Period Ended: If the notification relates to a portion of the filing checked above, identify the item(s) to which the notification relates: PART I-REGISTRANT INFORMATION RMG Acquisition Corp.

February 16, 2023 EX-99.1

JOINT FILING AGREEMENT

EX-99.1 2 rmgcex9901.htm JOINT FILING AGREEMENT Exhibit 99.1 JOINT FILING AGREEMENT Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended, and the rules and regulations thereunder (the “Exchange Act”) the undersigned hereby agree to the joint filing on behalf of each of them of any filing required by such party under Section 13 of the Exchange Act or any rule or regula

February 16, 2023 SC 13G

RMG ACQUISITION CORP III -A SPECIAL PURPOSE ACQUISITION COMPANIES / Meteora Capital, LLC - SC 13G Passive Investment

SC 13G 1 rmgc13g.htm SC 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* RMG Acquisition Corp. III (Name of Issuer) Class A Ordinary share, $0.0001 par value (Title of Class of Securities) G76088106 (CUSIP Number) December 31, 2022 (Date of Event which Requires Filing of this Statement) Check the ap

February 13, 2023 SC 13G/A

RMG ACQUISITION CORP III -A SPECIAL PURPOSE ACQUISITION COMPANIES / ARISTEIA CAPITAL LLC Passive Investment

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

January 11, 2023 425

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 11, 2023 (January 11, 202

425 1 d445982d425.htm 425 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 11, 2023 (January 11, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (Sta

January 11, 2023 EX-3.1

Second Amended and Restated Memorandum and Articles of Association of RMG III.

Exhibit 3.1 THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES SECOND AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION OF RMG ACQUISITION CORP. III (ADOPTED BY SPECIAL RESOLUTION DATED JANUARY 11, 2023 AND EFFECTIVE ON JANUARY 11, 2023) THE COMPANIES ACT (AS REVISED) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES SECOND AMENDED AND RESTATED MEMORANDUM OF ASS

January 11, 2023 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): January 11, 2023 (January 11, 202

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 11, 2023 (January 11, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction o

January 10, 2023 425

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 10, 2023 (January 10, 202

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): January 10, 2023 (January 10, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction o

January 10, 2023 EX-99.1

RMG Acquisition Corp. III Announces Adjournment of Special Meeting of Shareholders Until 10:00 AM Eastern Time On January 11, 2023

Exhibit 99.1 1/9/23, 9:39 PM Item Preview | Copy Approval | Connect | Business Wire RMG Acquisition Corp. III Announces Adjournment of Special Meeting of Shareholders Until 10:00 AM Eastern Time On January 11, 2023 Contacts Investor Contact: Philip Kassin President & COO RMG Acquisition Corp. III 50 West Street, Suite 40C New York, NY 10006 Telephone: (212) 785-2579 Email: [email protected]

January 10, 2023 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): January 10, 2023 (January 10, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction o

January 4, 2023 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): January 4, 2023 (January 4, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of

January 4, 2023 EX-99.1

- 1 -

Exhibit 99.1 Letter of intent for H2B2 Electrolysis Technologies, a Leading Developer and Operator of Green Hydrogen Production Systems for Clean Energy Generation, to Go Public on the NASDAQ via a Business Combination with RMG Acquisition Corporation III ? H2B2 not only manufactures small and large scale electrolyzers, but also offers its customers a full suite of customized end-to-end energy sol

January 4, 2023 425

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 4, 2023 (January 4, 2023)

425 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 4, 2023 (January 4, 2023) RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction

December 1, 2022 DEF 14A

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

DEF 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 29, 2022 CORRESP

* * *

CORRESP 1 filename1.htm 811 Main Street, Suite 3700 Houston, TX 77002 Tel: +1.713.546.5400 Fax: +1.713.546.5401 www.lw.com FIRM / AFFILIATE OFFICES November 29, 2022 Austin Milan Beijing Munich Boston New York Brussels Orange County Century City Paris Chicago Riyadh Dubai San Diego Düsseldorf San Francisco Frankfurt Seoul Hamburg Shanghai Hong Kong Silicon Valley Houston Singapore London Tel Aviv

November 29, 2022 PRER14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1)

PRER14A 1 d384434dprer14a.htm PRER14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Information Required in Proxy Statement Schedule 14A Information Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. 1) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate bo

November 17, 2022 PRE 14A

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

PRE 14A Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

November 3, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ☐ TRANSITION R

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to RMG ACQUISITION CORP.

October 27, 2022 8-K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K CURRENT REPORT PURSUANT TO SECTION 13 OR 15(D) OF THE SECURITIES EXCHANGE ACT OF 1934 Date of Report (Date of earliest event reported): October 21, 2022 RMG ACQUISITION CORP. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other jurisdiction of incorporation) (C

August 15, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ☐ TRANSITION REPORT

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to RMG ACQUISITION CORP. III

May 13, 2022 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ☐ TRANSITION REPOR

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ? QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2022 OR ? TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to RMG ACQUISITION CORP. III

March 31, 2022 EX-4.2

Description of the Company’s securities.

Exhibit 4.2 DESCRIPTION OF SECURITIES As of December 31, 2021, RMG Acquisition Corp. III (?we,? ?our,? ?us? or the ?company?) had the following three classes of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the ?Exchange Act?): (i) its units, each consisting of one Class A ordinary share and one-fifth of one redeemable warrant, (ii) Class A ordinary sha

March 31, 2022 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ 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 PUR

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ 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 To Commission File No. 001-400

February 14, 2022 SC 13G

RMG ACQUISITION CORP III -A SPECIAL PURPOSE ACQUISITION COMPANIES / ARISTEIA CAPITAL LLC - SC 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. *) RMG Acquisition Corp. III (Name of Issuer) Class A Ordinary Shares, par value $0.0001 per share (Title of Class of Securities) G76088106 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to

November 22, 2021 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2021 OR ☐ TRANSITION REPORT PURSU

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, 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to RMG ACQUISITION CORP. III (Exact

November 16, 2021 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): ☐ Form 10-K ☐ Form 20-F ☐ Form 11-K ☒ Form 10-Q ☐ Form 10-D ☐ Form N-CEN ☐ Form N-CSR For Period Ended: September 30, 2021 ☐ Tr

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): ? Form 10-K ? Form 20-F ? Form 11-K ? Form 10-Q ? Form 10-D ? Form N-CEN ? Form N-CSR For Period Ended: September 30, 2021 ? Transition Report on Form 10-K ? Transition Report on Form 20-F ? Transition Report on Form 11-K ? Transition Report on Form 10-Q For the Transition Period Ended: Read Instruction (on back page) Before Preparing Form.

November 16, 2021 8-K

Non-Reliance on Previously Issued Financial Statements or a Related Audit Report or Completed Interim Review

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 RMG Acquisition Corp. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 85-1574120 (State or other jurisdiction of incorporation) (

August 16, 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.C. 20549 FORM 10-Q ⌧ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2021 OR ◻ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to RMG ACQUISITION CORP. III (Exact name

June 3, 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.

June 2, 2021 EX-99.1

RMG Acquisition Corp. III Receives Expected Notice From Nasdaq Regarding Delayed Quarterly Report

EX-99.1 2 tm2118124d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 RMG Acquisition Corp. III Receives Expected Notice From Nasdaq Regarding Delayed Quarterly Report June 1, 2021 Miami Beach, FL - (BUSINESS WIRE) - RMG Acquisition Corp. III (the “Company”) announced that, on May 28, 2021, it received a notice (“Notice”) from the Listing Qualifications Department of The Nasdaq Stock Market (“Nasdaq”) stating

June 2, 2021 8-K

Notice of Delisting or Failure to Satisfy a Continued Listing Rule or Standard; Transfer of Listing, 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): May 28, 2021 RMG Acquisition Corp. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 85-1574120 (State or other jurisdiction of incorporation) (Commi

May 18, 2021 NT 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

NT 10-Q 1 tm2114955d2nt10q.htm NT 10-Q UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 12b-25 NOTIFICATION OF LATE FILING (Check One): ¨ Form 10-K ¨ Form 20-F ¨ Form 11-K x Form 10-Q ¨ Form 10-D ¨ Form N-CEN ¨ Form N-CSR For Period Ended: March 31, 2021 ¨ Transition Report on Form 10-K ¨ Transition Report on Form 20-F ¨ Transition Report on Form 11-K ¨ Transition Report

March 26, 2021 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 26, 2021 RMG Acquisition Corp. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 85-1574120 (State or other jurisdiction of incorporation) (Com

March 26, 2021 EX-99.1

RMG Acquisition Corp. III Announces the Separate Trading of its Class A Ordinary Shares and Warrants, Commencing March 29, 2021

EX-99.1 2 tm2110974d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 RMG Acquisition Corp. III Announces the Separate Trading of its Class A Ordinary Shares and Warrants, Commencing March 29, 2021 March 26, 2021 New York, NY - (BUSINESS WIRE) - RMG Acquisition Corp. III (the “Company”) announced that, commencing March 29, 2021, holders of the units sold in the Company’s initial public offering (the “Units”)

February 16, 2021 EX-99.1

RMG ACQUISITION CORPORATION III

EX-99.1 2 tm215649d1ex99-1.htm EXHIBIT 99.1 Exhibit 99.1 RMG ACQUISITION CORPORATION III Report of Independent Registered Public Accounting Firm F-2 Balance Sheet as of February 9, 2021 F-3 Notes to Financial Statement F-4 REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM To the Shareholders and Board of Directors of RMG Acquisition Corp. III Opinion on the Financial Statement We have audite

February 16, 2021 8-K

Financial Statements and Exhibits, Other Events

8-K 1 tm215649d18k.htm 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): February 9, 2021 RMG Acquisition Corp. III (Exact name of registrant as specified in its charter) Cayman Islands 001-40013 98-1574120 (State or other j

February 9, 2021 EX-10.2

Investment Management Trust Account Agreement, dated February 4, 2021, between Continental Stock Transfer & Trust Company and the Company

EX-10.2 6 tm215650d1ex10-2.htm EXHIBIT 10.2 Exhibit 10.2 INVESTMENT MANAGEMENT TRUST AGREEMENT This Investment Management Trust Agreement (this “Agreement”) is made effective as of February 4, 2021, by and between RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation (the “Trustee”). WHEREAS, the Company

February 9, 2021 EX-3.1

Amended and Restated Memorandum and Articles of Association

Exhibit 3.1 THE COMPANIES ACT (As Revised) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION OF RMG ACQUISITION CORP. III (adopted by special resolution dated 4 FEBRUARY 2021 and effective on 4 FEBRUARY 2021) THE COMPANIES ACT (As Revised) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES AMENDED AND RESTATED MEMORANDUM OF ASSOCIATION OF RMG

February 9, 2021 EX-10.5

Administrative Services Agreement between the Company and RMG Acquisition Management, LLC

EX-10.5 9 tm215650d1ex10-5.htm EXHIBIT 10.5 Exhibit 10.5 RMG Acquisition Corp. III 50 West Street, Suite 40C New York, NY 10006 February 4, 2021 RMG Acquisition Management, LLC 50 West Street, Suite 40C New York, NY 10006 Re: Administrative Services Agreement Ladies and Gentlemen: This Administrative Services Agreement (this “Agreement”) by and between RMG Acquisition Management, LLC (the “Provide

February 9, 2021 EX-10.4

Administrative Services Agreement, dated February 4, 2021, between the Company and the Sponsor

Exhibit 10.4 SPONSOR WARRANTS PURCHASE AGREEMENT THIS SPONSOR WARRANTS PURCHASE AGREEMENT, dated as of February 4, 2021 (as it may from time to time be amended, this “Agreement”), is entered into by and between RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and RMG Sponsor III, LLC, a Delaware limited liability company (the “Purchaser”). WHEREAS: The Company intends

February 9, 2021 EX-4.1

Warrant Agreement between Continental Stock Transfer & Trust Company and the Company, dated February 4, 2021

Exhibit 4.1 WARRANT AGREEMENT RMG ACQUISITION CORP. III and CONTINENTAL STOCK TRANSFER & TRUST COMPANY Dated February 4, 2021 THIS WARRANT AGREEMENT (this “Agreement”), dated February 4, 2021, is by and between RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (in such capacity, the

February 9, 2021 EX-10.1

Letter Agreement, dated February 4, 2021, among the Company, the Sponsor and the Company’s officers and directors

Exhibit 10.1 February 4, 2021 RMG Acquisition Corp. III 50 West Street, Suite 40C New York, NY 10006 Re: Initial Public Offering Ladies and Gentlemen: This letter (this “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”) entered into by and between RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), an

February 9, 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, Entry into a Material Definitive Agreement, Unregistered Sales of Equity Securities, 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 Section 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): February 4, 2021 RMG Acquisition Corp. III (Exact name of registrant as specified in its charter) Cayman Islands 001-838108 98-1574120 (State or other jurisdiction of incorpor

February 9, 2021 EX-99.2

RMG Acquisition Corp. III Announces Closing of $483,000,000 Initial Public Offering

EX-99.2 11 tm215650d1ex99-2.htm EXHIBIT 99.2 Exhibit 99.2 RMG Acquisition Corp. III Announces Closing of $483,000,000 Initial Public Offering February 9, 2021 NEW YORK-(BUSINESS WIRE)-Feb. 9, 2021- RMG Acquisition Corp. III (the “Company”) announced today the closing of its initial public offering of 48,300,000 units, which included the full exercise of the underwriters’ over-allotment option, at

February 9, 2021 EX-1.1

Underwriting Agreement by and among the Company, BofA Securities, Inc. and Barclays Capital Inc.

EX-1.1 2 tm215650d1ex1-1.htm EXHIBIT 1.1 Exhibit 1.1 42,000,000 Units RMG ACQUISITION CORP. III Units, each consisting of one Class A ordinary share, U.S. $0.0001 par value, and one-fifth of one warrant UNDERWRITING AGREEMENT February 4, 2021 February 4, 2021 BofA Securities, Inc. Barclays Capital Inc. As Representatives of the several Underwriters c/o BofA Securities, Inc. One Bryant Park New Yor

February 9, 2021 EX-10.3

Registration Rights Agreement, dated February 4, 2021, among the Company, the Sponsor and certain other security holders named therein

EX-10.3 7 tm215650d1ex10-3.htm EXHIBIT 10.3 Exhibit 10.3 REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of February 4, 2021 is made and entered into by and among RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and RMG Sponsor III, LLC, a Delaware limited liability company (the “Sponsor”), and any other parties listed on t

February 9, 2021 EX-99.1

RMG Acquisition Corp. III Announces Pricing of $420,000,000 Initial Public Offering

Exhibit 99.1 RMG Acquisition Corp. III Announces Pricing of $420,000,000 Initial Public Offering February 4, 2021 NEW YORK-(BUSINESS WIRE)—February 4, 2021- RMG Acquisition Corp. III (the “Company”) announced today that it priced its initial public offering of 42,000,000 units at $10.00 per unit. The units will be listed on The Nasdaq Capital Market (“Nasdaq”) and trade under the ticker symbol “RM

February 8, 2021 424B4

$420,000,000 RMG Acquisition Corp. III 42,000,000 Units

424B4 1 tm2039603-9424b4.htm 424B4 TABLE OF CONTENTS  Filed Pursuant to Rule 424(b)(4)  Registration No. 333-251889 PROSPECTUS $420,000,000 RMG Acquisition Corp. III 42,000,000 Units RMG Acquisition Corp. III is a newly incorporated blank check company, incorporated as a Cayman Islands exempted company for the purpose of effecting a merger, amalgamation, share exchange, asset acquisition, share pu

February 4, 2021 8-A12B

- FORM 8-A12B

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-A FOR REGISTRATION OF CERTAIN CLASSES OF SECURITIES PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 RMG Acquisition Corp. III (Exact Name of Registrant as Specified in Its Charter) Cayman Islands 98-1574120 (State or other jurisdiction (I.R.S. Employer of incorporation or organization) Identifica

February 2, 2021 EX-10.4

Form of Registration Rights Agreement between the Registrant and certain security holders

EX-10.4 11 tm2039603d6ex10-4.htm EXHIBIT 10.4 Exhibit 10.4 REGISTRATION RIGHTS AGREEMENT THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”), dated as of [●], 2021 is made and entered into by and among RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and RMG Sponsor III, LLC, a Delaware limited liability company (the “Sponsor”), and any other parties listed on the si

February 2, 2021 EX-1.1

Form of Underwriting Agreement

EX-1.1 2 tm2039603d6ex1-1.htm EXHIBIT 1.1 42,000,000 Units RMG ACQUISITION CORP. III Units, each consisting of one Class A ordinary share, U.S. $0.0001 par value, and one-fifth of one warrant UNDERWRITING AGREEMENT [●], 2021 [●], 2021 BofA Securities, Inc. Barclays Capital Inc. As Representatives of the several Underwriters c/o   BofA Securities, Inc. One Bryant Park New York, New York 10036 c/o  

February 2, 2021 EX-4.1

Specimen Unit Certificate

Exhibit 4.1 NUMBER UNITS U- SEE REVERSE FOR CERTAIN DEFINITIONS CUSIP RMG ACQUISITION CORP. III UNITS CONSISTING OF ONE CLASS A ORDINARY SHARE AND ONE-FIFTH OF ONE REDEEMABLE WARRANT, EACH WHOLE WARRANT ENTITLING THE HOLDER TO PURCHASE ONE CLASS A ORDINARY SHARE THIS CERTIFIES THAT is the owner of Units. Each Unit (“Unit”) consists of one (1) Class A Ordinary Share, par value $0.0001 per share (“C

February 2, 2021 EX-10.6

Form of Sponsor Warrants Purchase Agreement between the Registrant and RMG Sponsor III, LLC

Exhibit 10.6 SPONSOR WARRANTS PURCHASE AGREEMENT THIS SPONSOR WARRANTS PURCHASE AGREEMENT, dated as of [●], 2021 (as it may from time to time be amended, this “Agreement”), is entered into by and between RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and RMG Sponsor III, LLC, a Delaware limited liability company (the “Purchaser”). WHEREAS: The Company intends to cons

February 2, 2021 EX-3.2

Form of Amended and Restated Memorandum and Articles of Association

Exhibit 3.2 THE COMPANIES ACT (2021 Revision) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES AMENDED AND RESTATED MEMORANDUM AND ARTICLES OF ASSOCIATION OF RMG ACQUISITION CORP. III (adopted by special resolution dated [DATE] and effective on [DATE]) THE COMPANIES ACT (2021 Revision) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES AMENDED AND RESTATED MEMORANDUM OF ASSOCIATION OF RMG ACQUISITION

February 2, 2021 EX-10.8

Form of Administrative Services Agreement, by and between the Registrant and an affiliate of the Registrant

EX-10.8 14 tm2039603d6ex10-8.htm EXHIBIT 10.8 Exhibit 10.8 RMG Acquisition Corp. III 50 West Street, Suite 40C New York, NY 10006 [•], 2021 RMG Acquisition Management, LLC 50 West Street, Suite 40C New York, NY 10006 Re: Administrative Services Agreement Ladies and Gentlemen: This Administrative Services Agreement (this “Agreement”) by and between RMG Acquisition Management, LLC (the “Provider”) a

February 2, 2021 EX-4.2

Specimen Class A Ordinary Share Certificate

Exhibit 4.2 NUMBER NUMBER C SHARES SEE REVERSE FOR CERTAIN DEFINITIONS CUSIP RMG ACQUISITION CORP. III INCORPORATED UNDER THE LAWS OF THE CAYMAN ISLANDS CLASS A ORDINARY SHARES This Certifies that is the owner of FULLY PAID AND NON-ASSESSABLE CLASS A ORDINARY SHARES OF THE PAR VALUE OF U.S.$0.0001 EACH OF RMG ACQUISITION CORP. III (THE “COMPANY”) subject to the Company’s amended and restated memor

February 2, 2021 EX-10.7

Form of Indemnity Agreement

EX-10.7 13 tm2039603d6ex10-7.htm EXHIBIT 10.7 Exhibit 10.7 INDEMNITY AGREEMENT THIS INDEMNITY AGREEMENT (this “Agreement”) is made as of [●], 2021. Between: (1) RMG ACQUISITION CORP. III, an exempted company incorporated under the laws of the Cayman Islands with registered office at PO Box 309, Ugland House, Grand Cayman, KY1-1104, Cayman Islands (the “Company”); and (2) [●] (“Indemnitee”). Wherea

February 2, 2021 EX-10.2

Form of Letter Agreement among the Registrant and its officers and directors and RMG Sponsor III, LLC

Exhibit 10.2 [●], 2021 RMG Acquisition Corp. III 50 West Street, Suite 40C New York, NY 10006 Re: Initial Public Offering Ladies and Gentlemen: This letter (this “Letter Agreement”) is being delivered to you in accordance with the Underwriting Agreement (the “Underwriting Agreement”) entered into by and between RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and BofA

February 2, 2021 S-1/A

- S-1/A

TABLE OF CONTENTS As filed with the U.S. Securities and Exchange Commission on February 2, 2021. Registration No. 333-251889 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Amendment No. 1 to FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 RMG Acquisition Corp. III (Exact name of registrant as specified in its charter) Cayman Islands (State or other jurisdi

February 2, 2021 EX-4.4

Form of Warrant Agreement between Continental Stock Transfer & Trust Company and the Registrant

Exhibit 4.4 WARRANT AGREEMENT RMG ACQUISITION CORP. III and CONTINENTAL STOCK TRANSFER & TRUST COMPANY Dated [ ], 2021 THIS WARRANT AGREEMENT (this “Agreement”), dated [ ], 2021, is by and between RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation, as warrant agent (in such capacity, the “Warrant Agen

February 2, 2021 EX-10.3

Form of Investment Management Trust Agreement between Continental Stock Transfer & Trust Company and the Registrant

Exhibit 10.3 INVESTMENT MANAGEMENT TRUST AGREEMENT This Investment Management Trust Agreement (this “Agreement”) is made effective as of [●], 2021, by and between RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), and Continental Stock Transfer & Trust Company, a New York corporation (the “Trustee”). WHEREAS, the Company’s registration statement on Form S-1, File No. 333

January 4, 2021 S-1

Power of Attorney (included on the signature page to this Registration Statement)

TABLE OF CONTENTS As filed with the U.S. Securities and Exchange Commission on January 4, 2021. Registration No. 333-      UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM S-1 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 RMG Acquisition Corp. III (Exact name of registrant as specified in its charter) Cayman Islands (State or other jurisdiction of incorporatio

January 4, 2021 EX-99.4

Consent of Catherine D. Rice

Exhibit 99.4 Consent of Director Nominee In connection with the filing by RMG Acquisition Corp. III (the “Company”) of its Registration Statement (the “Registration Statement”) on Form S-1 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named as a nominee to the b

January 4, 2021 EX-99.2

Consent of Craig Broderick

Exhibit 99.2 Consent of Director Nominee In connection with the filing by RMG Acquisition Corp. III (the “Company”) of its Registration Statement (the “Registration Statement”) on Form S-1 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named as a nominee to the b

January 4, 2021 EX-3.1

Memorandum and Articles of Association

EX-3.1 2 tm2039603d4ex3-1.htm EXHIBIT 3.1 Exhibit 3.1 THE COMPANIES ACT (2020 REVISION) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES MEMORANDUM AND ARTICLES OF ASSOCIATION OF RMG ACQUISITION CORP. III THE COMPANIES ACT (2020 REVISION) OF THE CAYMAN ISLANDS COMPANY LIMITED BY SHARES MEMORANDUM OF ASSOCIATION OF RMG ACQUISITION CORP. III 1 The name of the Company is RMG Acquisition Corp. III. 2 T

January 4, 2021 EX-99.3

Consent of W. Thaddeus Miller

Exhibit 99.3 Consent of Director Nominee In connection with the filing by RMG Acquisition Corp. III (the “Company”) of its Registration Statement (the “Registration Statement”) on Form S-1 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named as a nominee to the b

January 4, 2021 EX-99.1

Consent of W. Grant Gregory

Exhibit 99.1 Consent of Director Nominee In connection with the filing by RMG Acquisition Corp. III (the “Company”) of its Registration Statement (the “Registration Statement”) on Form S-1 with the Securities and Exchange Commission under the Securities Act of 1933, as amended (the “Securities Act”), I hereby consent, pursuant to Rule 438 of the Securities Act, to being named as a nominee to the b

January 4, 2021 EX-10.5

Securities Subscription Agreement, dated December 30, 2020, between the Registrant and RMG Sponsor III, LLC

EX-10.5 4 tm2039603d4ex10-5.htm EXHIBIT 10.5 Exhibit 10.5 RMG ACQUISITION CORP. III 50 West Street, Suite 40C New York, New York 10006 RMG Sponsor III, LLC December 30, 2020 50 West Street, Suite 40C New York, New York 10006 RE: Securities Subscription Agreement Ladies and Gentlemen: RMG Acquisition Corp. III, a Cayman Islands exempted company (the “Company”), is pleased to accept the offer RMG Sp

January 4, 2021 EX-10.1

Promissory Note, dated December 30, 2020, issued to RMG Sponsor III, LLC

EX-10.1 3 tm2039603d4ex10-1.htm EXHIBIT 10.1 Exhibit 10.1 THIS PROMISSORY NOTE (THIS “NOTE”) HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”). THIS NOTE HAS BEEN ACQUIRED FOR INVESTMENT ONLY AND MAY NOT BE SOLD, TRANSFERRED OR ASSIGNED IN THE ABSENCE OF REGISTRATION OF THE RESALE THEREOF UNDER THE SECURITIES ACT OR AN OPINION OF COUNSEL REASONABLY SATISFA

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