Tsurumi Manufacturing

6351.TTSE PRIMEMachinery
Major holders (5%+) · 2
HolderStakeChangeFiled
Dalton Investments, Inc.13.71%+1.02pp2026-06-18
T's Corporation Co., Ltd.6.99%—2026-08-06

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

Former and minor holders (below 5%) · 5
Daikou4.44%2026-08-06
Osamu Tsujimoto0.86%2026-08-06
Eri Tsujimoto0.60%2026-08-06
Akitoshi Tsujimoto0.14%2026-08-06
Tsurumikosan0.00%2025-11-05
Ownership history · 16
FiledHolderRatioChangePurpose
2026-08-06Akitoshi Tsujimoto2026-08-060.14%newStable shareholder; Long-term holding
2026-08-06Eri Tsujimoto2026-08-060.60%no changeStable shareholder; Long-term holding
2026-08-06Osamu Tsujimoto2026-08-060.86%+0.06ppStable shareholder; Long-term holding
2026-08-06Daikou2026-08-064.44%no changeStable shareholder; Long-term holding
2026-08-06T's Corporation Co., Ltd.2026-08-066.99%newStable shareholder; Long-term holding
2026-06-18Dalton Investments, Inc.2026-06-1813.71%+1.02ppMaterial proposals to management (activist); Engagement / governance dialogue; Long-term holding
2026-03-31Dalton Investments, Inc.2026-03-3112.69%+1.02ppEngagement / governance dialogue; Long-term holding
2025-11-05AmendedTsurumikosan2025-11-05 · amended0.00%-1.99ppStable shareholder; Long-term holding
2025-11-05AmendedEri Tsujimoto2025-11-05 · amended0.60%+0.04ppStable shareholder; Long-term holding
2025-11-05AmendedOsamu Tsujimoto2025-11-05 · amended0.80%+0.08ppStable shareholder; Long-term holding
2025-11-05AmendedDaikou2025-11-05 · amended4.44%+2.33ppStable shareholder; Long-term holding
2024-05-20AmendedEri Tsujimoto2024-05-20 · amended0.56%newStable shareholder; Long-term holding
2024-05-20AmendedOsamu Tsujimoto2024-05-20 · amended0.72%newStable shareholder; Long-term holding
2024-05-20AmendedTsurumikosan2024-05-20 · amended1.99%newStable shareholder; Long-term holding
2024-05-20AmendedDaikou2024-05-20 · amended2.11%newStable shareholder; Long-term holding
2024-02-08Dalton Investments, Inc.2024-02-0811.67%newEngagement / governance dialogue; Long-term holding

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