# EDGAR Filing Document

**Accession Number:** 0001913847
**File Stem:** 0000950142-26-001669
**Filing Date:** 2026-6
**Character Count:** 20599
**Document Hash:** 1b688b170405d099a5e138049da2bb9e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000950142-26-001669.hdr.sgml**: 20260609

**ACCESSION NUMBER**: 0000950142-26-001669

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20260609

**DATE AS OF CHANGE**: 20260609

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Coincheck Group N.V.
- **CENTRAL INDEX KEY:** 0001913847
- **STANDARD INDUSTRIAL CLASSIFICATION:** FINANCE SERVICES [6199]
- **ORGANIZATION NAME:** 09 Crypto Assets
- **EIN:** 000000000
- **STATE OF INCORPORATION:** P7
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-94856
- **FILM NUMBER:** 261074740

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** NIEUWEZIJDS VOORBURGWAL 162
- **CITY:** 1012 SJ AMSTERDAM
- **PROVINCE COUNTRY:** P7
- **BUSINESS PHONE:** 31-20-522-2555

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** NIEUWEZIJDS VOORBURGWAL 162
- **CITY:** 1012 SJ AMSTERDAM
- **PROVINCE COUNTRY:** P7

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Coincheck Group B.V.
- **DATE OF NAME CHANGE:** 20220228
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** KDDI CORP
- **CENTRAL INDEX KEY:** 0001106215
- **ORGANIZATION NAME:** International Corp Fin
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D

**BUSINESS ADDRESS:**
- **STREET 1:** 2-3-2 NISHI SHINJUKU
- **STREET 2:** SHINJINKU-KU
- **CITY:** TOKYO
- **STATE:** M0
- **ZIP:** 163-8003
- **BUSINESS PHONE:** 481333477111

**MAIL ADDRESS:**
- **STREET 1:** 2-3-2 NISHI SHINJUKU
- **STREET 2:** SHINJINKU-KU
- **CITY:** TOKYO
- **STATE:** M0
- **ZIP:** 163-8003

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** KDD CORP
- **DATE OF NAME CHANGE:** 20000210

## Ex-99

**Appendix A**

Set forth below is the name and present principal occupation or employment of each director and executive officer of the Reporting Person. The business address of each of the directors and executive officers is c/o KDDI Corporation, The Linkpillar 1 North, 2-21-1 Takanawa, Minato-ku, Tokyo 108-8618, Japan.

---

| | | |
|:---|:---|:---|
| **Name** | **KDDI<br> Directors and Executive Officers<br> Present Principal Occupation or Employment** | **Citizenship** |
| Makoto Takahashi | Chairman and Representative Director of KDDI | Japan |
| Hiromichi Matsuda | President, Representative Director, CEO, and Executive Director (Corporate & Marketing Communications Sector) of KDDI | Japan |
| Yasuaki Kuwahara | Executive Vice President, Representative Director, and Executive Director (Business Solution Sector) of KDDI | Japan |
| Nanae Saishoji | Senior Managing Executive Officer, Director, Executive Officer of Sustainability, CFO, and Executive Director (Corporate Sector) of KDDI | Japan |
| Hiroshi Takezawa | Senior Managing Executive Officer, Director, and Executive Director (Personal Business Sector) of KDDI | Japan |
| Tomohiko Katsuki | Managing Executive Officer, Director, Chief Digital Officer, Executive Director (Open Innovation Division), Chief Strategy Officer, and Executive Director (Corporate Strategy Planning Division) of KDDI | Japan |
| Goro Yamaguchi | Outside Director of KDDI, Outside Director of Toyota Tsusho Corporation, and Chairman of the Board and Representative Director of Kyocera Corporation | Japan |
| Keiji Yamamoto | Outside Director of KDDI and Chief Officer (Digital Information and Communication Group) of Toyota Motor Corporation | Japan |
| Tsutomu Tannowa | Outside Director of KDDI, Outside Director of Tokyo Gas Co., Ltd., and Director and Chairperson of the Board of Mitsui Chemicals, Inc. | Japan |
| Junko Okawa | Outside Director of KDDI, Outside Director of Tokyo Electric Power Company Holdings, Inc., and Outside Director of Asahi Group Holdings, Ltd. | Japan |
| Kyoko Okumiya | Outside Director of KDDI, Director of Japan Corporate Governance Network, Outside Director of Asahi Kogyosha Co., Ltd., and Partner of Tanabe & Partners | Japan |
| Makoto Ando | Outside Director of KDDI, Programme Director of Fundamental Technologies for Sustainable Efficient Radio Wave Use R&D Project of Ministry of Internal Affairs and Communications of Japan, Chairperson of Japan Coordinating Council for Wireless Power Transfer, Programme Director of Strategic Information and Communications R&D Promotion Programme of Ministry of Internal Affairs and Communications of Japan, and Emeritus Professor of Institute of Science Tokyo | Japan |
| Kazuyuki Yoshimura | Senior Managing Executive Officer of KDDI | Japan |
| Masatoshi Natani | Managing Executive Officer of KDDI | Japan |
| Kazuhiro Yamamoto | Managing Executive Officer of KDDI | Japan |
| Hirohisa Furuichi | Managing Executive Officer of KDDI | Japan |
| Kazuhiko Masuda | Managing Executive Officer of KDDI | Japan |
| Takashi Kishida | Managing Executive Officer of KDDI | Japan |
| Yasuo Tawara | Managing Executive Officer of KDDI | Japan |
| Hiroaki Hosoi | Managing Executive Officer of KDDI | Japan |
| Masakazu Kuroi | Executive Officer of KDDI | Japan |
| Hiroyuki Akaishi | Executive Officer of KDDI | Japan |
| Kazukuni Tada | Executive Officer of KDDI | Japan |
| Hitoshi Oda | Executive Officer of KDDI | Japan |
| Tomoko Nakayama | Executive Officer of KDDI | Japan |
| Tatsuo Sato | Executive Officer of KDDI | Japan |
| Akihito Fujii | Executive Officer of KDDI | Japan |
| Hajime Nakamura | Executive Officer of KDDI | Japan |
| Toshikazu Murayama | Executive Officer of KDDI | Japan |
| Kenji Aketa | Executive Officer of KDDI | Japan |
| Yoshihiro Uchiyama | Executive Officer of KDDI | Japan |
| Takashi Kimura | Executive Officer of KDDI | Japan |
| Masami Sasaki | Executive Officer of KDDI | Japan |
| Masato Kobayashi | Executive Officer of KDDI | Japan |
| Naoto Hishida | Executive Officer of KDDI | Japan |
| Yukio Uemura | Executive Officer of KDDI | Japan |
| Hirotoyo Nakashima | Executive Officer of KDDI | Japan |
| Tomoyuki Otani | Executive Officer of KDDI | Japan |
| Keiji Tanaka | Executive Officer of KDDI | Japan |
| Makoto Kadowaki | Executive Officer of KDDI | Japan |
| Kazuhiro Furuhata | Executive Officer of KDDI | Japan |
| Takayo Takamuro | Executive Officer of KDDI | Japan |
| Shinya Muramoto | Executive Officer of KDDI | Japan |
| Nobuaki Monoe | Executive Officer of KDDI | Japan |
| Shugo Takagi | Executive Officer of KDDI | Japan |
| Hiroki Hisaki | Executive Officer of KDDI | Japan |
| Kentaro Matsuura | Executive Officer of KDDI | Japan |
| Hiromasa Sugisaki | Executive Officer of KDDI | Japan |
| Katsuhiko Arai | Executive Officer of KDDI | Japan |
| Satoshi Miyaji | Executive Officer of KDDI | Japan |
| Kaichiro Tezuka | Executive Officer of KDDI | Japan |

---

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**Coincheck Group N.V.**

*(Name of Issuer)*

**Ordinary Shares, nominal value Euro 0.01 per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**KDDI Corporation**<br>The Linkpillar 1 North<br>2-21-1 Takanawa, Minato-ku<br>Tokyo M0 108-8618<br>813-3347-0077

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**06/09/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**KDDI Corporation** | Name of reporting person<br>**KDDI Corporation** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[ ] (a)<br>[x] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**WC** | Source of funds (See Instructions)<br>**WC** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**M0** | Citizenship or place of organization<br>**M0** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**28536516.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**136247594.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**28536516.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**28536516.00** | Aggregate amount beneficially owned by each reporting person<br>**28536516.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[x] | |
| 13 | Percent of class represented by amount in Row (11)<br>**14.9%** | Percent of class represented by amount in Row (11)<br>**14.9%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** The Reporting Person may be deemed to share with Monex Group, Inc., the controlling shareholder of the Issuer ("Monex"), the power to vote or direct the vote of the 136,247,594 ordinary shares of the Issuer beneficially owned by Monex as disclosed in the report on Schedule 13D filed by Monex with the U.S. Securities and Exchange Commission on May 14, 2026 (together with the Shares reported on row 7, representing 85.9% of the outstanding ordinary shares of the Issuer calculated on the basis described in Item 5 of this Schedule 13D), due to Monex's agreement to vote in favor of electing a person nominated by the Reporting Person to serve on the board of directors of the Issuer as further described herein.  The Reporting Person and Monex have no other voting agreement with respect to, share no power to dispose or direct the disposition of, and share no pecuniary interest in, any ordinary shares of the Issuer, including the Shares and the ordinary shares of the Issuer beneficially owned by Monex.  The Reporting Person expressly disclaims formation of a group with Monex with respect to any ordinary shares of the Issuer, including the Shares and the ordinary shares of the Issuer beneficially owned by Monex.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Ordinary Shares, nominal value Euro 0.01 per share

**(b) Name of Issuer:**
Coincheck Group N.V.

**(c) Address of Issuer's Principal Executive Offices:**
Nieuwezijds Voorburgwal 162, Amsterdam, P7, 1012 SJ

**Item 4. Purpose of Transaction**

The information set forth in Items 3, 5 and 6 is hereby incorporated by reference into this Item 4.

The Reporting Person acquired the Shares as an investment and to seek business opportunities with the Issuer and its subsidiaries and affiliates.  Consistent with such purposes, and pursuant to the share subscription and investor rights agreement between the Reporting Person and the Issuer, dated May 12, 2026 (the "Share Subscription Agreement")and the agreement between the Reporting Person and Monex Group, Inc., the controlling shareholder of the Issuer ("Monex"), dated May 12, 2026 (the "Acknowledgement Agreement"), each further described below, subject to the limitations, rules and requirements under applicable law, limitations under the articles of incorporation of the Issuer, as amended, as well as any restrictions under the transaction documents described in Item 6, including the aforementioned agreements, the Reporting Person may engage in communications with, without limitation, management of the Issuer, one or more members of the board of directors of the Issuer, other shareholders of the Issuer and other relevant parties, and may make suggestions, concerning the business, assets, capitalization, financial condition, operations, governance, management, prospects, strategy, strategic transactions, financing strategies and alternatives, and future plans of the Issuer, and such other matters as the Reporting Person may deem relevant to its investment in the Issuer, which communications and suggestions may include proposing or considering one or more of the actions described in subsections (a) through (j) of Item 4 of Schedule 13D.

Pursuant to the Share Subscription Agreement and the Acknowledgement Agreement, the Reporting Person expects to nominate a person to be elected in or around September 2026 to serve as a member of the board of directors of the Issuer.

The foregoing descriptions of the Share Subscription Agreement and the Acknowledgement Agreement do not purport to be complete and are qualified in their entirety by reference to the full text of the respective agreements, which are filed hereto as Exhibits 1 and 3 and are incorporated by reference herein.

In 2025, the Reporting Person established a joint venture with Coincheck, Inc., a subsidiary of the Issuer organized under the laws of Japan, and au Financial Holdings Corporation, a subsidiary of the Reporting Person organized under the laws of Japan.  As a further strategic step forward, the Reporting Person intends to collaborate with Coincheck, Inc., through a business alliance, on initiatives aimed at expanding the digital asset market in Japan, including through mutual customer referral programs and related revenue sharing and referral fees.

Depending on various factors (including, without limitation, the Issuer's financial position and strategic direction, actions taken by the board of directors of the Issuer, market conditions and general economic and industry conditions), and subject to certain restrictions and limitations included in the transaction documents described in Item 6, the Reporting Person may take such actions with respect to its investment in the Issuer as the Reporting Person deems appropriate, including, without limitation, purchasing additional ordinary shares or other financial instruments of or related to the Issuer, selling some or all of its beneficial holdings to a third party, or transferring some or all of its beneficial holdings to a subsidiary or affiliate, and/or otherwise changing its intention with respect to any and all matters referred to in this Item 4.  Furthermore, the Reporting Person may, from time to time, propose modifications or additions to the business dealings with the Issuer or its subsidiaries and affiliates.

Except as set forth herein, the Reporting Person does not have plans or proposals at this time that relate to or would result in any of the transactions described in subparagraphs (a) through (j) of Item 4 of Schedule 13D.  The Reporting Person may, at any time and from time to time, review or reconsider its position and/or change its purpose and/or formulate plans or proposals with respect thereto.

The information set forth in this Item 4 is subject to change or update from time to time, and there can be no assurances that the Reporting Person will or will not exercise or take, or cause to be exercised or taken, any of the arrangements or actions described above or actions similar thereto.

**Item 5. Interest in Securities of the Issuer**

**(a)**
The information set forth in rows 7 through 11 and 13 of the cover page of this Schedule 13D is incorporated herein by reference.

As of the date on the cover page of this Schedule 13D, the Reporting Person beneficially owns 28,536,516 Shares, representing 14.9% of the outstanding ordinary shares of the Issuer.  This ownership percentage has been calculated based on 162,983,725 ordinary shares outstanding as disclosed in the Form 6-K filed by the Issuer with the U.S. Securities and Exchange Commission (the "SEC") on May 12, 2026, plus an additional 277,732 ordinary shares which the Reporting Person understands, based on information provided by the Issuer, to be issued and outstanding as a result of the conversion of certain restricted share units subsequent to the filing of the Form 6-K, plus the 28,536,516 of Shares reported herein.

The Reporting Person has the sole power to vote or direct the vote and to dispose or direct the disposition of the Shares.

The Reporting Person may be deemed to share with Monex, the controlling shareholder of the Issuer, the power to vote or direct the vote of the 136,247,594 ordinary shares of the Issuer beneficially owned by Monex as disclosed in the report on Schedule 13D filed by Monex with the SEC) on May 14, 2026 (together with the Shares, representing 85.9% of the outstanding ordinary shares of the Issuer calculated on the same basis as described in the immediately preceding paragraph), due to Monex's agreement to vote in favor of electing a person nominated by the Reporting Person to serve on the board of directors of the Issuer as further described in Item 6.  The Reporting Person and Monex have no other voting agreement with respect to, share no power to dispose or direct the disposition of, and share no pecuniary interest in, any ordinary shares of the Issuer, including the Shares and the ordinary shares of the Issuer beneficially owned by Monex.  The Reporting Person expressly disclaims formation of a group with Monex with respect to any ordinary shares of the Issuer, including the Shares and the ordinary shares of the Issuer beneficially owned by Monex.

**(b)**
The information set forth in Item 5(a) is incorporated herein by reference.

**(c)**
Except as set forth in this Schedule 13D, the Reporting Person has not effected any transactions in the Issuer's ordinary shares during the past 60 days.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

The responses to Items 3, 4 and 5 are incorporated by reference into Item 6.

Share Subscription Agreement

On June 9, 2026, the Reporting Person purchased 28,536,516 Shares newly issued by the Issuer for $65,063,256.48, or $2.28 per share, pursuant to the Share Subscription Agreement, dated May 12, 2026.  The Shares are subject to a lock-up provision in the Share Subscription Agreement, which provides that the Shares shall not be transferable, saleable, assignable or pledgeable until six months after the consummation of the purchase, subject to certain limited exceptions.  Under the Share Subscription Agreement, the Reporting Person has the right to nominate a person to serve as a member of the board of directors of the Issuer.  The foregoing description of the Share Subscription Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Share Subscription Agreement, which is filed as Exhibit 1 hereto and is incorporated by reference herein.

Registration Rights Agreement

On May 12, 2026, the Reporting Person and the Issuer entered into a registration rights agreement (the "Registration Rights Agreement"), which became effective as of the consummation of the purchase and pursuant to which the Issuer granted certain demand registration rights and piggyback rights to the Reporting Person with respect to the Shares following the six-month lock-up period as set forth in the Share Subscription Agreement.  The foregoing description of the Registration Rights Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Registration Rights Agreement, which is filed as Exhibit 2 hereto and is incorporated by reference herein.

Acknowledgement Agreement

On May 12, 2026, the Reporting Person and Monex entered into the Acknowledgement Agreement pursuant to which Monex agreed to vote in favor of electing a person nominated by the Reporting Person to serve on the board of directors of the Issuer.  The foregoing description of the Acknowledgement Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Acknowledgement Agreement, which is filed as Exhibit 3 hereto and is incorporated by reference herein.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** KDDI Corporation

**Signature:** /s/ Hiromichi Matsuda

**Name/Title:** Hiromichi Matsuda, President, Representative Director and CEO

**Date:** 06/09/2026