StockDriftsStockDriftsSOFT99corporation (4464) has 9 disclosed large-shareholding filings and 4 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥27.7B ($179.0M) in reported transaction value. The earliest filing StockDrifts holds for SOFT99corporation is dated 2021-03-23; the most recent is 2026-05-07. Across these filings the average return since disclosure is +48.04%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-09-17 | BUY | unknown | サントレード株式会社 | unknown | 3.2M | ¥4,050 | - | - |
| 2026-09-17 | BUY | subscription | エフィッシモ キャピタル マネージメント ピーティーイー エルティーディー Effissimo Capital Management Pte. Ltd. | activist | 11.8M | ¥4,050 | - | - |
| 2026-09-16 | BUY | unknown | 田中 秀明 | other | 678.5K | ¥4,045 | - | ¥2.7B ($17.7M) |
| 2026-09-16 | BUY | subscription | サントレード株式会社 | other | 3.2M | ¥4,045 | - | - |
| 2026-05-07 | BUY | unknown | エフィッシモ キャピタル マネージメント ピーティーイー エルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd. | activist | 11.8M | ¥3,665 | - | - |
| 2026-03-12 | BUY | Market Buy | エフィッシモ キャピタル マネージメント ピーティーイー エルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd. | activist | 11.8M | ¥3,885 | +4.5% | ¥15.7B ($101.1M) |
| 2025-11-25 | SELL | negotiated | KeePer技研株式会社 代表取締役会長兼CEO 谷 好通 KeePer Technical Laboratory Co., Ltd. | strategic | 0 | ¥4,000 | -1.5% | ¥10.8B ($69.4M) |
| 2025-11-21 | BUY | unknown | 鈴木 幹子 MIKIKO SUZUKI | other | 1.5M | ¥4,000 | - | - |
| 2025-11-21 | BUY | unknown | サントレード株式会社 SUN TRADE CO.,LTD | other | 3.2M | ¥4,000 | - | - |
| 2025-11-19 | BUY | acquisition | エフィッシモ キャピタル マネージメント ピーティーイー エルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd. | activist | 7.8M | ¥4,005 | +1.4% | ¥31.3B ($201.7M) |
| 2025-10-20 | BUY | negotiated | 株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc. | strategic | 799.2K | ¥3,255 | - | - |
| 2025-10-20 | BUY | negotiated | 三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc. | strategic | 144.0K | ¥3,255 | - | - |
| 2025-10-20 | SELL | negotiated | 三菱UFJ eスマート証券株式会社 Mitsubishi UFJ eSmart Securities Co., Ltd. | unknown | 0 | ¥3,255 | -24.7% | ¥1.3B ($8.2M) |
| 2025-09-30 | BUY | negotiated | 株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc. | strategic | 799.2K | ¥3,470 | +17.0% | ¥2.8B ($17.9M) |
| 2025-09-30 | BUY | negotiated | 三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc. | strategic | 144.0K | ¥3,470 | +17.0% | ¥500M ($3.2M) |
| 2025-09-30 | BUY | negotiated | 三菱UFJ eスマート証券株式会社 Mitsubishi UFJ eSmart Securities Co., Ltd. | other | 392.8K | ¥3,470 | +17.0% | ¥1.4B ($8.8M) |
| 2025-09-17 | BUY | negotiated | KeePer技研株式会社 KeePer Technical Laboratory Co., Ltd. | strategic | 2.7M | ¥3,465 | - | - |
| 2025-08-12 | SELL | unknown | サントレード株式会社 SUN TRADE CO.,LTD | other | 3.2M | ¥2,500 | -62.4% | ¥273M ($1.8M) |
| 2025-08-12 | BUY | unknown | 鈴木 幹子 MIKIKO SUZUKI | other | 1.5M | ¥2,500 | - | - |
| 2025-08-12 | BUY | unknown | サントレード株式会社 SUN TRADE CO.,LTD | other | 1.7M | ¥2,500 | +62.4% | ¥4.2B ($27.1M) |
| 2025-08-12 | BUY | unknown | 鈴木 幹子 MIKIKO SUZUKI | other | 746.3K | ¥2,500 | +62.4% | ¥1.9B ($12.0M) |
| 2025-03-17 | SELL | Market Buy | シンプレクス・アセット・マネジメント株式会社 Simplex Asset Management Co., Ltd. | passive | 0 | ¥1,720 | -136.1% | ¥4.8B ($31.0M) |
| 2025-03-14 | BUY | unknown | KeePer技研株式会社 KeePer Technical Laboratory Co., Ltd. | other | 2.7M | ¥1,615 | +151.4% | ¥4.3B ($28.0M) |
| 2021-03-23 | BUY | Market Buy | シンプレクス・アセット・マネジメント株式会社 Simplex Asset Management Co., Ltd. | passive | 2.8M | ¥1,205.327 | +236.8% | ¥311M ($2.0M) |
Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.