StockDriftsStockDriftsTriIs Incorporated (4840) has 26 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥1.2B ($7.9M) in reported transaction value. The earliest filing StockDrifts holds for TriIs Incorporated is dated 2021-12-28; the most recent is 2026-05-12. Across these filings the average return since disclosure is +118.89%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-08-24 | BUY | Market Buy | 池田 有希子 Yukiko Ikeda | passive | 859.8K | ¥554 | - | ¥92M ($591K) |
| 2026-08-24 | SELL | Market Buy | 池田 有希子 Yukiko Ikeda | passive | 859.8K | ¥554 | -37.5% | ¥92M ($591K) |
| 2026-07-24 | BUY | Market Buy | 池田 有希子 Yukiko Ikeda | passive | 948.9K | ¥558 | - | ¥48M ($311K) |
| 2026-07-24 | SELL | Market Buy | 池田 有希子 Yukiko Ikeda | passive | 948.9K | ¥558 | -36.6% | ¥48M ($311K) |
| 2026-06-30 | SELL | subscription | 有限会社キャピタル・マネジメント Capital Management | activist | 2.2M | ¥615 | -23.9% | ¥18M ($113K) |
| 2026-05-29 | BUY | subscription | 岩尾 俊兵 SHUMPEI IWAO | other | 750.7K | ¥978 | - | ¥190M ($1.2M) |
| 2026-05-29 | BUY | subscription | 岩尾 俊兵 SHUMPEI IWAO | other | 750.7K | ¥978 | -22.1% | ¥190M ($1.2M) |
| 2026-05-12 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 862.7K | ¥842 | -9.5% | ¥51M ($329K) |
| 2026-05-01 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 719.0K | ¥765 | -0.4% | ¥82M ($528K) |
| 2026-05-01 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 802.0K | ¥765 | -0.4% | ¥63M ($410K) |
| 2026-05-01 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 495.7K | ¥765 | -0.4% | ¥379M ($2.4M) |
| 2026-05-01 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 611.8K | ¥765 | -0.4% | ¥89M ($574K) |
| 2026-05-01 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 802.0K | ¥765 | - | ¥63M ($410K) |
| 2026-05-01 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 611.7K | ¥765 | - | ¥89M ($574K) |
| 2026-05-01 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 495.7K | ¥765 | - | ¥379M ($2.4M) |
| 2026-05-01 | BUY | Market Buy | 南 壮栄 Chanyon Minami | activist | 719.0K | ¥765 | - | ¥82M ($528K) |
| 2026-04-22 | SELL | Market Buy | 池田 有希子 YUKIKO IKEDA | passive | 1.0M | ¥1,009 | +24.5% | ¥105M ($675K) |
| 2026-04-09 | SELL | Market Buy | FOU JOHN CHI CHONG John Fou | activist | 400.0K | ¥880 | +13.4% | ¥92M ($594K) |
| 2026-04-01 | BUY | subscription | 有限会社キャピタル・マネジメント Capital Management | activist | 2.3M | ¥788 | - | - |
| 2026-04-01 | SELL | subscription | 有限会社キャピタル・マネジメント Capital Management | activist | 2.3M | ¥788 | +3.3% | ¥322M ($2.1M) |
| 2026-03-26 | BUY | unknown | 岩尾 俊兵 Shumpei Iwao | activist | 498.0K | ¥517 | +47.4% | ¥257M ($1.7M) |
| 2026-03-24 | BUY | subscription | 有限会社キャピタル・マネジメント Capital Management | activist | 2.8M | ¥429 | +77.6% | ¥591M ($3.8M) |
| 2026-01-20 | BUY | Market Buy | FOU JOHN CHI CHONG John Fou | activist | 505.0K | ¥502 | +51.8% | ¥42M ($274K) |
| 2026-01-20 | BUY | Market Buy | FOU JOHN CHI CHONG John Fou | activist | 505.0K | ¥502 | - | ¥42M ($274K) |
| 2025-11-27 | BUY | Market Buy | 有限会社キャピタル・マネジメント Capital Management | activist | 898.7K | ¥485 | +57.1% | ¥41M ($265K) |
| 2025-11-10 | BUY | Market Buy | FOU JOHN CHI CHONG John Fou | passive | 420.0K | ¥497 | +53.3% | ¥209M ($1.3M) |
| 2025-10-08 | BUY | Market Buy | 有限会社キャピタル・マネジメント Capital Management | activist | 814.4K | ¥485 | +57.1% | ¥80M ($517K) |
| 2025-10-08 | BUY | Market Buy | 有限会社キャピタル・マネジメント Capital Management | activist | 814.4K | ¥485 | - | ¥80M ($517K) |
| 2025-10-02 | BUY | Market Buy | 有限会社キャピタル・マネジメント Capital Management | activist | 648.7K | ¥489 | +55.8% | ¥317M ($2.0M) |
| 2023-02-21 | BUY | subscription | 池田 均(相続人代表 池田 有希子) Hitoshi Ikeda(Yukiko Ikeda) | other | 721.6K | ¥397 | +91.9% | ¥31M ($198K) |
| 2023-02-21 | BUY | Market Buy | 池田 有希子 Yukiko Ikeda | activist | 1.1M | ¥397 | +91.9% | ¥275M ($1.8M) |
| 2023-02-21 | BUY | unknown | 池田 有希子 Yukiko Ikeda | activist | 429.2K | ¥397 | +91.9% | ¥170M ($1.1M) |
| 2023-02-21 | BUY | subscription | 池田 均(相続人代表 池田 有希子) Hitoshi Ikeda(Yukiko Ikeda) | other | 721.6K | ¥397 | +91.9% | ¥31M ($198K) |
| 2023-02-21 | BUY | subscription | 池田 均(相続人代表 池田 有希子) Hitoshi Ikeda(Yukiko Ikeda) | activist | 682.6K | ¥397 | +91.9% | ¥43M ($278K) |
| 2023-02-21 | BUY | subscription | 池田 均(相続人代表 池田 有希子) Hitoshi Ikeda(Yukiko Ikeda) | activist | 601.6K | ¥397 | +91.9% | ¥38M ($246K) |
| 2023-02-21 | BUY | subscription | 池田 均(相続人代表 池田 有希子) Hitoshi Ikeda(Yukiko Ikeda) | activist | 568.8K | ¥397 | +91.9% | ¥226M ($1.5M) |
| 2023-02-21 | BUY | Market Buy | UGSアセットマネジメント株式会社 UGS Asset Management Co.,Ltd. | activist | 837.2K | ¥397 | +91.9% | ¥35M ($223K) |
| 2023-02-21 | BUY | subscription | 池田 有希子 Yukiko Ikeda | activist | 472.6K | ¥397 | +91.9% | ¥16M ($104K) |
| 2023-01-04 | BUY | Market Buy | UGSアセットマネジメント株式会社 UGS Asset Management Co.,Ltd. | activist | 750.0K | ¥395 | +92.9% | ¥39M ($250K) |
| 2022-12-15 | BUY | Market Buy | UGSアセットマネジメント株式会社 UGS Asset Management Co.,Ltd. | activist | 652.2K | ¥486 | +56.8% | ¥47M ($302K) |
| 2022-12-12 | BUY | Market Buy | UGSアセットマネジメント株式会社 UGS Asset Management Co.,Ltd. | activist | 555.8K | ¥462 | +64.9% | ¥63M ($408K) |
| 2022-11-14 | BUY | Market Buy | UGSアセットマネジメント株式会社 UGS Asset Management Co.,Ltd. | activist | 418.8K | ¥402 | +89.5% | ¥168M ($1.1M) |
| 2021-12-28 | BUY | unknown | 池田 有希子 Yukiko Ikeda | activist | 1.1M | ¥331 | - | ¥379M ($2.4M) |
| 2021-12-28 | BUY | unknown | 池田 有希子 Yukiko Ikeda | activist | 1.1M | ¥331 | +130.2% | ¥379M ($2.4M) |
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.