The activist investors below are those we track that have confirmed engagement (large shareholding or change filings) with SEIBU HOLDINGS INC., based on public disclosures. This does not necessarily mean any of them currently holds shares — see each investor's most recently filed report for the latest confirmed status.
Most recent filing: 2026-07-09
| 2026-07-09 | Change Report | 12.86%→13.91% |
| 2026-07-03 | Change Report | 11.41%→12.86% |
| 2026-06-25 | Change Report | 10.27%→11.41% |
| 2026-06-22 | Change Report | 9.02%→10.27% |
| 2026-06-12 | Change Report | 7.97%→9.02% |
| 2026-06-05 | Change Report | 6.92%→7.97% |
| 2026-05-25 | Change Report | 5.75%→6.92% |
This page mechanically aggregates EDINET large shareholding and change report filings for the tracked activist investors above. It reflects confirmed public disclosures only, not current holding status or any editorial judgment about future activity. Source: EDINET (the Financial Services Agency's electronic disclosure system), aggregated daily.