Coincheck Group N.V. (CNCK) director Oki Matsumoto files initial Form 3

Rhea-AI Filing Summary

Coincheck Group N.V. director Oki Matsumoto filed an initial ownership report on Form 3. The filing lists Matsumoto as a director of Coincheck Group N.V. and does not report any share transactions or derivative positions. It serves as a baseline disclosure of insider status.

SEC Form 3

FORM 3

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

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person^*

Matsumoto Oki

(Last) (First) (Middle)

NIEUWEZIJDS VOORBURGWAL

162, 1012 SJ

(Street)

AMSTERDAM

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
03/18/2026

3. Issuer Name and Ticker or Trading Symbol
Coincheck Group N.V. [ CNCK ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

Exhibit 24 - Power of Attorney.

No securities are beneficially owned.

	/s/ Marc Stone, as Attorney-in-Fact	03/18/2026
	** Signature of Reporting Person	Date
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 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)

FAQ

What does Coincheck Group N.V. (CNCK) disclose in this Form 3 for Oki Matsumoto?

The Form 3 identifies Oki Matsumoto as a director of Coincheck Group N.V. It serves as an initial statement of beneficial ownership and does not list any specific share or derivative holdings in the provided data.

Are any share purchases or sales reported for Oki Matsumoto in CNCK’s Form 3?

No share purchases or sales are reported in this Form 3. The transaction summary shows zero buy, sell, acquire, or dispose counts and netBuySellDirection described as neutral, indicating no insider trading activity in this filing.

Does Oki Matsumoto report any stock options or derivatives in this Coincheck (CNCK) Form 3?

No derivative positions are reported in the provided data. The derivativeSummary is empty and derivativeTransactionCount is zero, indicating no listed options, warrants, or other derivative securities for Matsumoto in this initial ownership statement.

What insider role does Oki Matsumoto hold at Coincheck Group N.V. (CNCK)?

The filing shows Oki Matsumoto as a director of Coincheck Group N.V. He is not flagged as an officer or a ten percent owner in the provided data, so the disclosed insider status is specifically his role on the board of directors.

Does the CNCK Form 3 for Oki Matsumoto indicate any gifting or tax-withholding transactions?

No gifting or tax-withholding transactions are shown. The summary lists zero giftCount and zero taxWithholdingCount, meaning there are no reported gifts of shares or shares withheld for taxes in this initial ownership filing.