Monex: Coincheck Group BV Announces Submission of Draft Confidential Registration Statement on Form F-4 Regarding Proposed Business Combination

Coincheck Group BV Announces Submission of Draft Confidential Registration Statement on Form F-4 Regarding Proposed Business Combination and De-SPAC with Thunder Bridge Capital Partners IV, Inc.

TOKYO, April 52022 – Coincheck Group BV (headquarters: Amsterdam, The Netherlands; management

Director: Akira Inoue; “CCG”), which will become a holding company of Coincheck, Inc. (Headquarters: Tokyo, Japan; Director and President: Satoshi Hasuo; “Coincheck”), and Thunder Bridge Capital Partners Ⅳ, Inc. (Headquarters: Virginia, USA; Chairman and

CEO: Gary Simanson; “THCP”), a special purpose acquisition company (“SPAC”) listed on the Nasdaq Global Market (Nasdaq), submitted a confidential draft registration statement on

Form F-4 to the US Securities and Exchange Commission (the “SEC”) on April 4, 2022 (EST) with respect to their previously announced business combination proposal.

As previously announced in the March 22, 2021 press release, “Coincheck Group BV will go public on the Nasdaq via a De-SPAC with Thunder Bridge Capital Partners IV, Inc.”, CCG and

THCP has entered into a definitive business combination agreement whereby CCG will become a Nasdaq-listed company under the symbol “CNCK” (the “Transaction”). Completion of the transaction, which is expected to close in the second half of 2022, is subject to THCP shareholder approval, registration statement declared effective by the SEC, and satisfaction or waiver of other customary closing conditions. identified in the business combination agreement. CCG expects to have an estimated implied net worth prior to

Transaction around $10.25 billion (the total market value of the shares of Coincheck, which will be a 100% subsidiary of CCG) plus any earn-out (price adjustment) consideration equal to up to 50 million shares, which is valued at US$500 million (assuming US$10 per share, which will be the initial price of the CCG shares).

Contact:

Akiko Kato

Yuki Nakano, Minaka Aihara

Corporate Communications Office

Investor Relations, Financial Control Department

Monex Group, Inc., +81-3-4323-8698

Monex Group, Inc., +81-3-4323-8698

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Important business combination information and where to find it

In connection with the proposed business combination, CCG intends to file a registration statement on Form F-4 which will include a preliminary proxy statement to be distributed to THCP shareholders in connection with the proxy solicitation. by THCP for the vote of its shareholders in respect of the proposed business combination. After the registration statement has been filed and declared effective by the US Securities and Exchange Commission (“SEC”), THCP will mail a definitive proxy statement/prospectus to its shareholders on the established record date to vote on the proposed business combination and other proposals relating to the proposed business combination set out in the proxy statement. CCG or THCP may also file other documents with the SEC relating to the proposed business combination. Before making any investment or voting decision, shareholders and other interested persons are advised to read, when available, the registration statement and proxy statement/preliminary prospectus and any amendments thereto. , together with the definitive proxy statement/prospectus in connection with the solicitation of proxies by THCP for the special meeting to be held to approve the transactions contemplated by the proposed business combination, as these documents will contain important information on CCG, Coincheck, THCP and the proposed transaction. Shareholders will also be able to obtain a copy of the preliminary proxy statement/prospectus and the definitive proxy statement/prospectus once they become available, free of charge, on the SEC’s website atwww.sec.govor by directing a request to: Thunder Bridge Capital Partners IV, Inc., 9912 Georgetown Pike,

Suite D203, Great Falls, Virginia 22066.

Participants in the solicitation

CCG, Coincheck and THCP and their respective directors and officers may be considered participants in the proxy solicitation of

shareholders of THCP in connection with the proposed business combination. THCP shareholders and other interested persons may obtain, free of charge, more detailed information regarding the directors and officers of Coincheck and THCP on the Coincheck website at corporate.coincheck.com, or in the Statement of registration of THCP on Form S-1 filed June 21, 2021. , respectively.

Information regarding persons who may, under SEC rules, be considered participants in the solicitation of proxies from THCP stockholders in connection with the proposed transaction will be set forth in the proxy statement/prospectus. of the transaction when they become available. Additional information regarding the interests of participants in the solicitation of proxies in connection with the proposed transaction will be included in the proxy statement/prospectus filed with the SEC in connection with the proposed business combination.

Forward-looking statements

This document contains “forward-looking statements” within the meaning of the “safe harbor” provisions of the United States Private

Securities Litigation Reform Act of 1995, which reflects current views regarding, among other things, the future operations and financial performance of the Company, THCP, Coincheck and CCG. Forward-looking statements can be identified by the use of words such as “anticipate”, “intend”, “seek”, “target”, “anticipate”, “believe”, “could”, “continue”, “expect”, “estimate”, “may”, “plan”,

“outlook”, “future” and “project” and other similar expressions which predict or indicate future events or trends or which are not statements of historical matters. These forward-looking statements include, but are not limited to, estimated financial information. These forward-looking statements regarding revenues, earnings, performance, strategies, prospects and other aspects of theCompany, THCP, Coincheck or CCG after completion of the proposed business combination are based on current expectations which are subject to risks and uncertainties. No assurance can be given that future developments affecting the Company, THCP, Coincheck or

CCG will be those provided. Actual results may differ materially from current expectations due to changes in global, regional or local economic, business, competitive, business, regulatory and other factors, many of which are beyond the Company’s control,

CCG, THCP and Coincheck. Should one or more of these risks or uncertainties materialize, or should any of the assumptions prove incorrect, actual results may differ materially from those projected in these forward-looking statements. A number of factors could cause actual results or results to differ materially from those indicated by these forward-looking statements. These factors include, but are not limited to: (1) the occurrence of any event, change or other circumstance that could give rise to the termination of the Business Combination Agreement (the “Agreement”) and the combination proposed businesses contemplated therein; (2) the inability to complete the transactions contemplated by the Agreement due to the inability to obtain THCP shareholder approval or other conditions to closing of the Agreement; (3) the ability to meet Nasdaq listing standards following completion of the transactions contemplated by the Agreement; (4) the risk that the proposed transaction will disrupt the current plans and operations of

Coincheck following the announcement and completion of the transactions described herein; (5) the ability to recognize the expected benefits of the proposed business combination, which may be affected by, among other things, competition, the ability to

CCG to grow and manage growth profitably, maintain relationships with customers and business partners, and retain its management and key employees; (6) costs related to the proposed business combination; (7) changes in applicable laws or regulations; (8) the possibility that Coincheck may be affected by other economic, business and/or competitive factors; and (9) other risks and uncertainties set forth from time to time in other documents filed or to be filed with the SEC by THCP or CCG. The Company cautions that the above list of factors is not exhaustive. The recipient of this document should not place undue reliance on forward-looking statements, which speak only as of the date on which they were made. The Company, CCG, THCP and Coincheck do not undertake to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

This material is an English translation of a Japanese announcement made on the above date. Although the Company intends to faithfully translate the Japanese document into English, the accuracy and correctness of such English translation is not guaranteed and you are therefore encouraged to refer to the original Japanese document. This translation has been made for information purposes only and does not

make an offer to sell or solicit an offer to buy securities in the United States