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Serverworks

4434.TInformation & Communication
Filed as Serverworks Co.,Ltd. (2022-07–2026-05)
Major holders (5%+) · 2
HolderStakeChangeFiled
Ryo Oishi19.95%-6.35pp2026-01-26
BS Asset Management Co., Ltd.16.03%+6.30pp2026-01-26

Each holder's own ratio from its most recent large-shareholding report.

Former and minor holders (below 5%) · 8
NTT DATA Corporation3.85%2025-12-26
NTT Communications Corporation3.34%2025-12-26
NTT DOCOMO BUSINESS, Inc.3.29%2026-01-19
Morgan Stanley MUFG Securities Co., Ltd.2.53%2024-02-06
Morgan Stanley & Co. International plc0.69%2024-02-06
Morgan Stanley & Co. LLC0.07%2024-02-06
NTT DATA JAPAN CORPORATION0.00%2026-01-19
NTT DATA Group Corporation0.00%2025-12-26
Ownership history · 28
FiledHolderRatioChangePurpose
2026-01-26BS Asset Management Co., Ltd.2026-01-2616.03%+6.30ppStable shareholder
2026-01-26Ryo Oishi2026-01-2619.95%-6.35ppStable shareholder
2026-01-19NTT DATA JAPAN CORPORATION2026-01-190.00%-3.30ppBusiness / capital relationship
2026-01-19NTT DOCOMO BUSINESS, Inc.2026-01-193.29%-0.01pp—
2026-01-07AmendedNTT DATA Japan Corporation2026-01-07 · amended3.30%no changeBusiness / capital relationship
2026-01-07AmendedNTT DOCOMO BUSINESS, Inc.2026-01-07 · amended3.30%no change—
2025-12-26AmendedNTT DATA Japan Corporation2025-12-26 · amended3.30%-0.04ppBusiness / capital relationship
2025-12-26AmendedNTT DOCOMO BUSINESS, Inc.2025-12-26 · amended3.30%new—
2025-12-26AmendedNTT DATA Japan Corporation2025-12-26 · amended3.34%no changeBusiness / capital relationship
2025-12-26AmendedNTT Communications Corporation2025-12-26 · amended3.34%no change—
2025-12-26AmendedNTT DATA Group Corporation2025-12-26 · amended0.00%newBusiness / capital relationship
2025-12-26AmendedNTT DATA Japan Corporation2025-12-26 · amended3.34%new—
2025-12-26AmendedNTT Communications Corporation2025-12-26 · amended3.34%-0.51pp—
2025-12-26Same-day filingNTT DATA Corporation2025-12-263.85%+0.50ppBusiness / capital relationship
2025-12-26Same-day filingNTT Communications Corporation2025-12-263.85%+0.50pp—
2025-12-26Same-day filingNTT DATA Corporation2025-12-263.35%newBusiness / capital relationship
2025-12-26Same-day filingNTT Communications Corporation2025-12-263.35%new—
2025-10-24AmendedBS Asset Management Co., Ltd.2025-10-24 · amended9.73%+2.75ppStable shareholder
2025-10-24AmendedRyo Oishi2025-10-24 · amended26.30%-2.88ppStable shareholder
2025-06-05BS Asset Management Co., Ltd.2025-06-056.98%+3.15ppStable shareholder

Each holder in 5% reports, joint holders included. Purpose is classified from the filed text.