StockDriftsStockDriftsKAINOS Laboratories, Inc. (4556) has 18 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 11 distinct investors. Together those filings cover ¥9.3B ($60.3M) in reported transaction value. The earliest filing StockDrifts holds for KAINOS Laboratories, Inc. is dated 2021-05-18; the most recent is 2026-04-07. Across these filings the average return since disclosure is +83.20%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-04-07 | BUY | unknown | 旭化成セラピューティクス株式会社 ASAHI KASEI THERAPEUTICS CORPORATION | other | 940.0K | ¥2,267 | - | - |
| 2026-04-07 | BUY | unknown | 旭化成セラピューティクス株式会社 ASAHI KASEI THERAPEUTICS CORPORATION | other | 940.0K | ¥2,267 | - | - |
| 2026-04-07 | SELL | unknown | みずほ証券 株式会社 | other | 6.0K | ¥2,267 | -0.0% | ¥299M ($1.9M) |
| 2026-04-07 | SELL | unknown | みずほ信託銀行株式会社 | other | 54.2K | ¥2,267 | -0.0% | ¥406M ($2.6M) |
| 2026-04-01 | BUY | unknown | Flowers株式会社 | activist | 3.2M | ¥2,261 | +0.3% | ¥7.3B ($47.0M) |
| 2026-04-01 | SELL | unknown | 光通信株式会社 | unknown | 0 | ¥2,261 | -0.3% | ¥740M ($4.8M) |
| 2026-04-01 | SELL | unknown | 株式会社UH Partners 2 | unknown | 0 | ¥2,261 | -0.3% | ¥756M ($4.9M) |
| 2026-04-01 | SELL | unknown | 株式会社UH Partners 3 | unknown | 0 | ¥2,261 | -0.3% | ¥581M ($3.8M) |
| 2026-04-01 | SELL | unknown | 株式会社エスアイエル | unknown | 0 | ¥2,261 | -0.3% | ¥137M ($884K) |
| 2026-03-31 | SELL | unknown | 杉山 晶子 Akiko Sugiyama | unknown | 0 | ¥2,263 | -0.2% | ¥1.0B ($6.5M) |
| 2026-03-31 | BUY | unknown | 旭化成ファーマ株式会社 | other | 940.0K | ¥2,263 | - | - |
| 2026-03-27 | SELL | unknown | シスメックス株式会社 Sysmex Corporation | unknown | 0 | ¥2,259 | -0.4% | ¥520M ($3.4M) |
| 2026-03-23 | BUY | unknown | みずほ証券 株式会社 | other | 137.8K | ¥2,256 | +0.5% | ¥147M ($949K) |
| 2026-03-23 | BUY | unknown | みずほ信託銀行株式会社 | other | 233.5K | ¥2,256 | - | - |
| 2026-03-06 | BUY | unknown | みずほ証券 株式会社 | other | 72.7K | ¥2,279 | - | ¥166M ($1.1M) |
| 2026-03-06 | SELL | unknown | みずほ信託銀行株式会社 | other | 233.5K | ¥2,279 | +0.5% | ¥96M ($617K) |
| 2026-02-27 | BUY | unknown | シスメックス株式会社 SYSMEX CORPORATION | strategic | 230.0K | ¥2,278 | - | - |
| 2026-02-27 | BUY | unknown | シスメックス株式会社 SYSMEX CORPORATION | strategic | 230.0K | ¥2,278 | - | - |
| 2026-02-20 | BUY | Market Buy | 株式会社UH Partners 2 | passive | 334.2K | ¥2,278 | - | - |
| 2026-02-20 | BUY | Market Buy | 光通信株式会社 | passive | 327.1K | ¥2,278 | - | - |
| 2026-02-20 | BUY | Market Buy | 株式会社UH Partners 3 | passive | 257.2K | ¥2,278 | -0.4% | ¥35M ($228K) |
| 2026-02-20 | BUY | Market Buy | 株式会社エスアイエル | passive | 60.8K | ¥2,278 | - | - |
| 2026-02-13 | BUY | unknown | 杉山 晶子 Akiko Sugiyama | strategic | 445.0K | ¥2,277 | - | - |
| 2026-02-09 | BUY | unknown | 旭化成ファーマ株式会社 ASAHI KASEI PHARMA CORPORATION | other | 940.0K | ¥1,604 | - | - |
| 2025-09-26 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 327.1K | ¥1,285 | - | - |
| 2025-09-26 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 334.2K | ¥1,285 | - | - |
| 2025-09-26 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 241.5K | ¥1,285 | +76.5% | ¥54M ($348K) |
| 2025-09-26 | BUY | Market Buy | 株式会社エスアイエル SIL Co., Ltd. | passive | 60.8K | ¥1,285 | - | - |
| 2025-06-30 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 334.2K | ¥1,239 | - | - |
| 2025-06-30 | BUY | Market Buy | 株式会社エスアイエル SIL Co., Ltd. | passive | 60.8K | ¥1,239 | - | - |
| 2025-06-30 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 327.1K | ¥1,239 | - | - |
| 2025-06-30 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 199.9K | ¥1,239 | +83.0% | ¥75M ($485K) |
| 2025-05-08 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 327.1K | ¥1,252 | - | - |
| 2025-05-08 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 334.2K | ¥1,252 | - | - |
| 2025-05-08 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 139.1K | ¥1,252 | +81.2% | ¥62M ($401K) |
| 2025-05-08 | BUY | Market Buy | 株式会社エスアイエル SIL Co., Ltd. | passive | 60.8K | ¥1,252 | - | - |
| 2025-01-20 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 327.1K | ¥1,284 | - | - |
| 2025-01-20 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 334.2K | ¥1,284 | - | - |
| 2025-01-20 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 89.2K | ¥1,284 | +76.6% | ¥77M ($498K) |
| 2025-01-20 | BUY | Market Buy | 株式会社エスアイエル SIL Co., Ltd. | passive | 60.8K | ¥1,284 | - | - |
| 2024-11-05 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 334.2K | ¥1,170 | +93.8% | ¥19M ($124K) |
| 2024-11-05 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 29.4K | ¥1,170 | - | ¥34M ($222K) |
| 2024-11-05 | BUY | Market Buy | 株式会社エスアイエル SIL Co., Ltd. | passive | 60.8K | ¥1,170 | - | - |
| 2024-11-05 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 327.1K | ¥1,170 | - | - |
| 2024-08-01 | BUY | Market Buy | 株式会社エスアイエル SIL Co., Ltd. | passive | 60.8K | ¥1,191 | - | - |
| 2024-08-01 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 327.1K | ¥1,191 | - | - |
| 2024-08-01 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 317.7K | ¥1,191 | +90.4% | ¥75M ($487K) |
| 2024-06-06 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 327.1K | ¥1,153 | - | - |
| 2024-06-06 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 254.5K | ¥1,153 | +96.7% | ¥53M ($339K) |
| 2024-06-06 | BUY | Market Buy | 株式会社エスアイエル SIL Co., Ltd. | passive | 60.8K | ¥1,153 | - | - |
Showing the 50 most recent of 70 filings.
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.