StockDriftsStockDriftsRiken Keiki Co., Ltd. (7734) has 18 disclosed large-shareholding filings and 17 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥15.0B ($96.6M) in reported transaction value. The earliest filing StockDrifts holds for Riken Keiki Co., Ltd. is dated 2021-12-07; the most recent is 2026-03-23. All of it is parsed from EDINET large-shareholding (5%+) reports, the official disclosure system operated by the Financial Services Agency (Japan). Across these filings the average return since disclosure is +25.86%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-05-18 | SELL | Market Buy | フォレスト・マナー・エヌ・ヴイ(Forest Manor N.V.) Forest Manor N.V. | passive | 2.1M | ¥3,750 | +8.8% | ¥1.8B ($11.7M) |
| 2026-03-23 | SELL | unknown | SMBC日興証券株式会社 | other | 13.9K | ¥3,030 | -12.5% | ¥47M ($305K) |
| 2026-03-23 | SELL | unknown | 株式会社 三井住友銀行 | other | 1.3M | ¥3,030 | -12.5% | ¥4.5B ($29.2M) |
| 2026-03-23 | BUY | unknown | 三井住友DSアセットマネジメント株式会社 | passive | 2.4M | ¥3,030 | +12.5% | ¥8.1B ($52.5M) |
| 2025-06-20 | SELL | unknown | フィデリティ投信株式会社 FIL Investments (Japan) Limited | other | 2.2M | ¥2,933 | -16.3% | ¥1.7B ($11.2M) |
| 2025-04-07 | BUY | Market Buy | キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company | passive | 3.2M | ¥2,186 | +56.0% | ¥1.8B ($11.5M) |
| 2024-12-06 | BUY | Market Buy | キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company | passive | 2.4M | ¥3,700 | -7.8% | ¥8.8B ($57.1M) |
| 2024-12-06 | BUY | Market Buy | キャピタル・リサーチ・アンド・マネージメント・カンパニー(Capital Research and Management Company) Capital Research and Management Company | passive | 2.4M | ¥3,700 | -7.8% | ¥8.8B ($57.1M) |
| 2024-11-22 | SELL | Market Buy | アセットマネジメントOne株式会社 Asset Management One Co., Ltd. | other | 796.3K | ¥3,715 | +8.2% | ¥105M ($681K) |
| 2024-11-22 | SELL | Market Buy | みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd. | strategic | 240.0K | ¥3,715 | +8.2% | ¥299M ($1.9M) |
| 2024-11-22 | BUY | Market Buy | みずほ証券 株式会社 Mizuho Securities Co., Ltd. | other | 275.2K | ¥3,715 | -8.2% | ¥1.0B ($6.6M) |
| 2024-11-22 | SELL | Market Buy | 株式会社みずほ銀行 Mizuho Bank, Ltd. | strategic | 1.8M | ¥3,715 | +8.2% | ¥387M ($2.5M) |
| 2024-09-24 | SELL | unknown | フィデリティ投信株式会社 FIL Investments (Japan) Limited | other | 2.8M | ¥4,115 | +17.1% | ¥2.0B ($12.9M) |
| 2024-04-05 | BUY | unknown | アセットマネジメントOne株式会社 Asset Management One Co., Ltd. | other | 825.6K | ¥3,635 | -6.2% | ¥482M ($3.1M) |
| 2024-04-05 | SELL | unknown | みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd. | strategic | 323.6K | ¥3,635 | +6.2% | ¥1.3B ($8.7M) |
| 2024-04-05 | BUY | unknown | みずほ証券 株式会社 Mizuho Securities Co., Ltd. | other | 26.8K | ¥3,635 | -6.2% | ¥9.8B ($63.3M) |
| 2024-04-05 | SELL | unknown | 株式会社みずほ銀行 Mizuho Bank, Ltd. | strategic | 1.9M | ¥3,635 | +6.2% | ¥1.3B ($8.7M) |
| 2024-03-25 | BUY | Market Buy | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 38.6K | ¥3,730 | -8.6% | ¥18M ($114K) |
| 2024-03-25 | BUY | Market Buy | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 837.1K | ¥3,730 | -8.6% | ¥3.1B ($20.1M) |
| 2024-03-25 | BUY | Market Buy | 三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited | passive | 941.5K | ¥3,730 | -8.6% | ¥962M ($6.2M) |
| 2024-02-07 | SELL | unknown | フィデリティ投信株式会社 FIL Investments (Japan) Limited | other | 1.6M | ¥3,965 | +14.0% | ¥2.4B ($15.3M) |
| 2023-04-21 | BUY | Market Buy | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 33.9K | ¥2,595 | +31.4% | ¥6M ($40K) |
| 2023-04-21 | BUY | Market Buy | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 837.1K | ¥2,595 | +31.4% | ¥2.2B ($14.0M) |
| 2023-04-21 | BUY | Market Buy | 三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited | passive | 684.6K | ¥2,595 | +31.4% | ¥694M ($4.5M) |
| 2023-02-22 | SELL | Market Buy | シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド(Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd. | passive | 1.1M | ¥2,580 | -32.2% | ¥818M ($5.3M) |
| 2022-11-22 | SELL | Market Buy | シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド(Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd. | passive | 1.4M | ¥2,575 | -32.4% | ¥1.2B ($7.6M) |
| 2022-11-22 | BUY | unknown | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 837.1K | ¥2,575 | +32.4% | ¥2.2B ($13.9M) |
| 2022-11-22 | BUY | unknown | 三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited | passive | 416.1K | ¥2,575 | +32.4% | ¥1.1B ($6.9M) |
| 2022-11-22 | BUY | unknown | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 29.7K | ¥2,575 | +32.4% | ¥76M ($493K) |
| 2022-10-21 | SELL | Market Buy | シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド(Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd. | passive | 1.9M | ¥1,977.5 | -72.4% | ¥566M ($3.7M) |
| 2022-10-07 | SELL | Market Buy | シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド(Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd. | passive | 2.2M | ¥2,035 | -67.6% | ¥515M ($3.3M) |
| 2022-09-27 | SELL | Market Buy | シンフォニー・フィナンシャル・パートナーズ(シンガポール)ピーティーイー・リミテッド(Symphony Financial Partners (Singapore) Pte. Ltd.) Symphony Financial Partners (Singapore) Pte. Ltd. | activist | 2.4M | ¥2,000 | -70.5% | ¥710M ($4.6M) |
| 2022-09-26 | BUY | Market Buy | フィデリティ投信株式会社 FIL Investments (Japan) Limited | other | 2.2M | ¥2,015 | +69.2% | ¥620M ($4.0M) |
| 2022-09-07 | BUY | Market Buy | フィデリティ投信株式会社 FIL Investments (Japan) Limited | other | 1.9M | ¥2,145 | +59.0% | ¥675M ($4.4M) |
| 2022-04-22 | BUY | Market Buy | フィデリティ投信株式会社 FIL Investments (Japan) Limited | other | 1.6M | ¥2,142.5 | +59.2% | ¥796M ($5.1M) |
| 2022-03-07 | BUY | unknown | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 837.1K | ¥2,332.5 | +46.2% | ¥2.0B ($12.6M) |
| 2022-03-07 | SELL | unknown | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 70.3K | ¥2,332.5 | -46.2% | ¥938M ($6.1M) |
| 2022-02-07 | BUY | unknown | フィデリティ投信株式会社 FIL Investments (Japan) Limited | other | 1.2M | ¥2,625 | +29.9% | ¥3.2B ($20.7M) |
| 2022-01-11 | BUY | unknown | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 837.1K | ¥2,655 | +28.4% | ¥2.2B ($14.3M) |
| 2022-01-11 | BUY | unknown | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 472.4K | ¥2,655 | +28.4% | ¥1.3B ($8.1M) |
| 2021-12-07 | BUY | unknown | みずほ証券 株式会社 Mizuho Securities Co., Ltd. | other | 70.1K | ¥2,695 | +26.5% | ¥189M ($1.2M) |
| 2021-12-07 | SELL | unknown | アセットマネジメントOne株式会社 Asset Management One Co., Ltd. | other | 344.7K | ¥2,695 | -26.5% | ¥281M ($1.8M) |
| 2021-12-07 | BUY | unknown | みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd. | strategic | 345.0K | ¥2,695 | +26.5% | ¥930M ($6.0M) |
| 2021-12-07 | BUY | unknown | 株式会社みずほ銀行 Mizuho Bank, Ltd. | strategic | 1.1M | ¥2,695 | +26.5% | ¥3.1B ($19.7M) |
Every trade listed above is disclosed in EDINET large-shareholding (5%+) reports, filed with the Financial Services Agency (Japan). View the original EDINET filings for Riken Keiki Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.