Sec Form 4 Filing - Simanson Gary A @ Thunder Bridge Capital Partners IV, Inc. - 2024-12-10

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Simanson Gary A 2. Issuer Name and Ticker or Trading Symbol Thunder Bridge Capital Partners IV, Inc. [ THCP] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director X __ 10% Owner X __ Officer (give title below) _____ Other (specify below) President and CEO (Last) (First) (Middle) 9912 GEORGETOWN PIKE, SUITE D203 3. Date of Earliest Transaction (MM/DD/YY) 12/10/2024 (Street) GREAT FALLS, VA22066 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) _____ Form filed by One Reporting Person __ X __ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Class A Common Stock 12/10/2024 D( 1 ) 6,561,250 ( 1 ) ( 2 ) D 0 ( 1 ) I See footnote ( 5 )

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Private Placement Units ( 3 ) 12/10/2024 D 648,055 ( 3 ) ( 3 ) Class A Common Stock 648,055 ( 4 ) 0 ( 4 ) I See footnote ( 5 )

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Simanson Gary A 9912 GEORGETOWN PIKE SUITE D203 GREAT FALLS, VA22066 X X President and CEO TBCP IV, LLC 9912 GEORGETOWN PIKE SUITE D203 GREAT FALLS, VA22066 X Signatures /s/ Gary A. Simanson Gary A. Simanson 12/12/2024 Signature of Reporting Person Date /s/ Gary A. Simanson, Gary A. Simanson, Managing Member of TBCP IV, LLC 12/12/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Business Combination Agreement, dated March 22, 2022, as amended, by and among the Issuer, Coincheck Group B.V., a Dutch private limited liability company (besloten vennootschap met beperkte aansprakelijkheid) ("PubCo") (which was converted into a Dutch public limited liability company (naamloze vennootschap) and renamed Coincheck Group N.V. immediately prior to the Business Combination), M1 Co G.K., a Japanese limited liability company (godo kaisha) ("HoldCo"), Coincheck Merger Sub, Inc., a Delaware corporation ("Merger Sub"), and Coincheck, Inc., a Japanese joint stock company (kabushiki kaisha) ("Coincheck") on December 10, 2024, Merger Sub merged with and into the Issuer, with the Issuer surviving as a wholly-owned subsidiary of PubCo. As a result of the Business Combination, each issued and outstanding share of Class A common stock of the Issuer was exchanged for an ordinary share of PubCo. ( 2 )Includes 648,055 shares of Class A common stock underlying Private Placement Units held by TBCP IV, LLC (the "Sponsor"). ( 3 )Each Private Placement Unit consists of one share of Class A common stock and one-fifth of one warrant, each whole warrant exercisable to purchase one share of Class A common stock. As described in the Issuer's Registration Statement on Form S-1 (File No. 333-254359) filed with the Securities and Exchange Commission on March 16, 2021 (the "Registration Statement"). ( 4 )The reporting persons disposed of all Private Placement Units upon the consummation of the Issuer's Business Combination, which were automatically separated and exchanged into one ordinary share of PubCo and one-fifth of one warrant, each whole warrant exercisable to purchase one ordinary share of PubCo. ( 5 )The Sponsor is the record holder of the securities reported herein. Mr. Simanson, the President and Chief Executive Officer of the Issuer, is the managing member of the Sponsor and has sole voting and investment discretion with respect to the common stock held of record by the Sponsor. By virtue of this relationship, Mr. Simanson may be deemed to have beneficial ownership of the securities held of record by the Sponsor. Each such person disclaims any beneficial ownership of the reported shares other than to the extent of any pecuniary interest they may have therein, directly or indirectly.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

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