StockDriftsStockDriftsJ.S.B.Co.,Ltd. (3480) has 31 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥27.6B ($178.4M) in reported transaction value. The earliest filing StockDrifts holds for J.S.B.Co.,Ltd. is dated 2021-08-05; the most recent is 2026-03-19. Across these filings the average return since disclosure is +137.91%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-08-18 | BUY | subscription | Ursa 4株式会社 Ursa 4 Kabushiki Kaisha | activist | 21.2M | ¥8,960 | -0.2% | ¥13.3B ($86.0M) |
| 2026-08-07 | BUY | Market Buy | 野村證券株式会社 | other | 3.8K | ¥8,970 | -0.3% | ¥20M ($127K) |
| 2026-08-07 | SELL | unknown | ノムラ インターナショナル ピーエルシー NOMURA INTERNATIONAL PLC | other | 34.4K | ¥8,970 | +0.3% | ¥12.2B ($79.0M) |
| 2026-08-07 | BUY | Market Buy | 野村アセットマネジメント株式会社 | other | 254.5K | ¥8,970 | -0.3% | ¥394M ($2.5M) |
| 2026-08-03 | SELL | unknown | 株式会社UH Partners 2 | unknown | 0 | ¥8,990 | +0.6% | ¥14.2B ($91.7M) |
| 2026-08-03 | SELL | unknown | 株式会社UH Partners 3 | unknown | 0 | ¥8,990 | +0.6% | ¥9.2B ($59.7M) |
| 2026-08-03 | SELL | unknown | 光通信株式会社 | unknown | 0 | ¥8,990 | +0.6% | ¥13.4B ($86.3M) |
| 2026-07-31 | BUY | subscription | Ursa 4株式会社 Ursa 4 Kabushiki Kaisha | activist | 19.7M | ¥8,960 | - | - |
| 2026-07-31 | BUY | subscription | Ursa 4株式会社 Ursa 4 Kabushiki Kaisha | activist | 19.7M | ¥8,960 | -0.2% | ¥176.8B ($1.1B) |
| 2026-07-30 | SELL | subscription | 岡 靖子 | activist | 0 | ¥9,230 | +3.1% | ¥66.4B ($428.4M) |
| 2026-07-30 | SELL | unknown | OMインベストメント株式会社 | activist | 0 | ¥9,230 | +3.1% | ¥10.5B ($67.9M) |
| 2026-07-22 | SELL | unknown | 野村證券株式会社 | other | 2.7K | ¥9,010 | +0.8% | ¥2.8B ($18.0M) |
| 2026-07-22 | BUY | Market Buy | ノムラ インターナショナル ピーエルシー NOMURA INTERNATIONAL PLC | other | 1.4M | ¥9,010 | -0.8% | ¥4.8B ($30.8M) |
| 2026-07-22 | SELL | unknown | 野村アセットマネジメント株式会社 | other | 211.8K | ¥9,010 | +0.8% | ¥475M ($3.1M) |
| 2026-07-07 | BUY | unknown | 野村證券株式会社 | other | 311.1K | ¥8,980 | -0.5% | ¥2.8B ($18.0M) |
| 2026-07-07 | BUY | unknown | ノムラ インターナショナル ピーエルシー NOMURA INTERNATIONAL PLC | other | 869.6K | ¥8,980 | -0.5% | ¥7.8B ($50.4M) |
| 2026-07-07 | BUY | unknown | 野村アセットマネジメント株式会社 | other | 263.4K | ¥8,980 | -0.5% | ¥2.4B ($15.3M) |
| 2026-07-01 | SELL | unknown | ニューバーガー・バーマン株式会社 | other | 0 | ¥8,980 | +0.5% | ¥14.3B ($92.1M) |
| 2026-07-01 | SELL | unknown | NEUBERGER BERMAN TAIWANLIMITED SITE | other | 25.8K | ¥8,980 | +0.5% | ¥197M ($1.3M) |
| 2026-06-19 | BUY | Market Buy | 光通信株式会社 | passive | 1.5M | ¥8,980 | -0.5% | ¥138M ($891K) |
| 2026-06-19 | BUY | Market Buy | 株式会社UH Partners 2 | passive | 1.6M | ¥8,980 | - | - |
| 2026-06-19 | BUY | Market Buy | 株式会社UH Partners 3 | passive | 1.0M | ¥8,980 | -0.5% | ¥394M ($2.5M) |
| 2026-06-18 | SELL | subscription | 岡 靖子 | activist | 7.2M | ¥8,980 | +0.5% | ¥1.5B ($9.9M) |
| 2026-06-18 | SELL | unknown | OMインベストメント株式会社 | activist | 1.1M | ¥8,980 | +0.5% | ¥237M ($1.5M) |
| 2026-03-19 | BUY | Market Buy | 光通信株式会社 | passive | 1.5M | ¥3,370 | +165.3% | ¥104M ($668K) |
| 2026-03-19 | SELL | Market Buy | 株式会社UH Partners 2 | passive | 1.6M | ¥3,370 | -165.3% | ¥7M ($48K) |
| 2026-03-19 | BUY | Market Buy | 株式会社UH Partners 3 | passive | 983.5K | ¥3,370 | +165.3% | ¥651M ($4.2M) |
| 2026-01-05 | BUY | Market Buy | ニューバーガー・バーマン株式会社 | other | 1.6M | ¥3,465 | +158.0% | ¥730M ($4.7M) |
| 2026-01-05 | BUY | Market Buy | NEUBERGER BERMAN TAIWANLIMITED SITE | other | 48.4K | ¥3,465 | +158.0% | ¥46M ($294K) |
| 2025-10-01 | BUY | Market Buy | ニューバーガー・バーマン株式会社 Neuberger Berman East Asia Limited | other | 1.4M | ¥3,950 | +126.3% | ¥901M ($5.8M) |
| 2025-10-01 | BUY | unknown | ニューバーガー・バーマン株式会社 Neuberger Berman East Asia Limited | other | 1.4M | ¥3,950 | +126.3% | ¥901M ($5.8M) |
| 2025-10-01 | BUY | unknown | NEUBERGER BERMAN TAIWANLIMITED SITE | other | 34.9K | ¥3,950 | +126.3% | ¥61M ($391K) |
| 2025-10-01 | BUY | Market Buy | NEUBERGER BERMAN TAIWANLIMITED SITE | other | 34.9K | ¥3,950 | +126.3% | ¥61M ($391K) |
| 2025-09-26 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 1.4M | ¥4,125 | - | - |
| 2025-09-26 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 1.6M | ¥4,125 | - | - |
| 2025-09-26 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 790.0K | ¥4,125 | +116.7% | ¥36M ($234K) |
| 2025-09-19 | BUY | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 1.4M | ¥3,900 | - | - |
| 2025-09-19 | SELL | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 1.6M | ¥3,900 | -129.2% | ¥9M ($55K) |
| 2025-09-19 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 780.9K | ¥3,900 | +129.2% | ¥864M ($5.6M) |
| 2025-06-02 | BUY | unknown | ニューバーガー・バーマン株式会社 Neuberger Berman East Asia Limited | other | 1.1M | ¥3,750 | +138.4% | ¥4.3B ($27.8M) |
| 2025-06-02 | BUY | unknown | NEUBERGER BERMAN TAIWANLIMITED SITE | other | 19.1K | ¥3,750 | +138.4% | ¥72M ($462K) |
| 2025-02-20 | SELL | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 1.4M | ¥3,155 | -183.4% | ¥7M ($45K) |
| 2025-02-20 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 1.6M | ¥3,155 | - | - |
| 2025-02-20 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 559.3K | ¥3,155 | +183.4% | ¥719M ($4.6M) |
| 2025-01-15 | SELL | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 1.4M | ¥2,747 | -225.4% | ¥12M ($78K) |
| 2025-01-15 | SELL | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 1.6M | ¥2,747 | -225.4% | ¥18M ($117K) |
| 2025-01-15 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 331.8K | ¥2,747 | +225.4% | ¥608M ($3.9M) |
| 2024-08-02 | SELL | Market Buy | 光通信株式会社 Hikari Tsushin K.K. | passive | 1.4M | ¥2,612 | -242.3% | ¥6M ($37K) |
| 2024-08-02 | BUY | Market Buy | 株式会社UH Partners 3 UH Partners 3 Co., Ltd. | passive | 109.4K | ¥2,612 | - | ¥286M ($1.8M) |
| 2024-08-02 | BUY | Market Buy | 株式会社UH Partners 2 UH Partners 2, Inc. | passive | 1.6M | ¥2,612 | +242.3% | ¥297M ($1.9M) |
Showing the 50 most recent of 80 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.