StockDriftsStockDriftsSumiseki Holdings,Inc. (1514) has 33 disclosed large-shareholding filings and 20 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥6.4B ($41.1M) in reported transaction value. The earliest filing StockDrifts holds for Sumiseki Holdings,Inc. is dated 2021-09-06; the most recent is 2025-06-13. Across these filings the average return since disclosure is +131.21%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-08-10 | SELL | unknown | 株式会社 三井住友銀行 | other | 1.0M | ¥624 | -3.0% | ¥172M ($1.1M) |
| 2026-08-10 | SELL | unknown | SMBC日興証券株式会社 | other | 46.0K | ¥624 | -3.0% | ¥105M ($677K) |
| 2026-08-10 | SELL | unknown | 株式会社 日本総合研究所 | other | 661.9K | ¥624 | -3.0% | ¥109M ($704K) |
| 2026-08-10 | SELL | unknown | 三井住友カード 株式会社 | other | 1.3M | ¥624 | -3.0% | ¥218M ($1.4M) |
| 2025-06-13 | SELL | unknown | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 215.2K | ¥632 | -1.7% | ¥387M ($2.5M) |
| 2025-06-13 | SELL | unknown | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 1.3M | ¥632 | -1.7% | ¥13M ($82K) |
| 2025-06-13 | SELL | unknown | 株式会社 日本総合研究所 Japan Research Institute Co., Ltd. | other | 835.9K | ¥632 | -1.7% | ¥13M ($82K) |
| 2025-06-13 | SELL | unknown | 三井住友カード 株式会社 Sumitomo Mitsui Card Co., Ltd. | other | 1.7M | ¥632 | -1.7% | ¥17M ($110K) |
| 2024-11-27 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | activist | 34.0M | ¥825 | -22.1% | ¥494M ($3.2M) |
| 2024-11-07 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | activist | 32.9M | ¥1,009 | -36.3% | ¥7.7B ($49.6M) |
| 2024-11-07 | BUY | unknown | 三井住友カード 株式会社 Sumitomo Mitsui Card Co., Ltd. | other | 1.7M | ¥1,009 | - | - |
| 2024-11-07 | SELL | unknown | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 1.3M | ¥1,009 | +36.3% | ¥7.2B ($46.5M) |
| 2024-11-07 | SELL | unknown | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 812.0K | ¥1,009 | +36.3% | ¥366M ($2.4M) |
| 2024-11-07 | BUY | unknown | 株式会社 日本総合研究所 Japan Research Institute Co., Ltd. | other | 835.9K | ¥1,009 | - | - |
| 2024-08-15 | BUY | unknown | 株式会社 日本総合研究所 Japan Research Institute Co., Ltd. | other | 835.9K | ¥917 | - | - |
| 2024-08-15 | BUY | unknown | 三井住友カード 株式会社 Sumitomo Mitsui Card Co., Ltd. | other | 1.7M | ¥917 | - | - |
| 2024-08-15 | BUY | unknown | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 8.5M | ¥917 | - | - |
| 2024-08-15 | SELL | unknown | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 1.2M | ¥917 | +29.9% | ¥618M ($4.0M) |
| 2024-07-25 | SELL | unknown | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 1.9M | ¥1,110 | +42.1% | ¥770M ($5.0M) |
| 2024-07-25 | BUY | unknown | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 8.5M | ¥1,110 | - | - |
| 2024-07-25 | BUY | unknown | 株式会社 日本総合研究所 Japan Research Institute Co., Ltd. | other | 835.9K | ¥1,110 | - | - |
| 2024-07-25 | BUY | unknown | 三井住友カード 株式会社 Sumitomo Mitsui Card Co., Ltd. | other | 1.7M | ¥1,110 | - | - |
| 2024-07-04 | BUY | Market Buy | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 2.5M | ¥1,314 | -51.1% | ¥2.9B ($18.5M) |
| 2024-07-04 | BUY | Market Buy | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 8.5M | ¥1,314 | - | - |
| 2024-07-04 | BUY | Market Buy | 株式会社 日本総合研究所 Japan Research Institute Co., Ltd. | other | 835.9K | ¥1,314 | - | - |
| 2024-07-04 | BUY | Market Buy | 三井住友カード 株式会社 Sumitomo Mitsui Card Co., Ltd. | other | 1.7M | ¥1,314 | - | - |
| 2024-05-22 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | activist | 25.2M | ¥1,769 | - | - |
| 2024-04-08 | BUY | unknown | 株式会社 三井住友銀行 Sumitomo Mitsui Banking Corporation | other | 8.5M | ¥1,119 | - | - |
| 2024-04-08 | BUY | unknown | SMBC日興証券株式会社 SMBC Nikko Securities Inc. | other | 359.0K | ¥1,119 | - | ¥402M ($2.6M) |
| 2024-04-08 | SELL | unknown | SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd. | other | 0 | ¥1,119 | +42.5% | ¥924M ($6.0M) |
| 2024-04-08 | BUY | unknown | 株式会社 日本総合研究所 Japan Research Institute Co., Ltd. | other | 835.9K | ¥1,119 | - | - |
| 2024-04-08 | BUY | unknown | 三井住友カード 株式会社 Sumitomo Mitsui Card Co., Ltd. | other | 1.7M | ¥1,119 | -42.5% | ¥916M ($5.9M) |
| 2023-12-04 | BUY | unknown | 株式会社 麻生 ASO CORPORATION | strategic | 25.2M | ¥781 | - | ¥717M ($4.6M) |
| 2023-12-04 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | strategic | 25.2M | ¥781 | -17.7% | ¥718M ($4.6M) |
| 2023-11-30 | BUY | unknown | 株式会社 麻生 ASO CORPORATION | strategic | 24.3M | ¥772 | - | ¥1.1B ($7.1M) |
| 2023-11-30 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | strategic | 24.3M | ¥772 | -16.7% | ¥1.1B ($7.1M) |
| 2023-11-29 | BUY | unknown | 株式会社 麻生 ASO CORPORATION | strategic | 22.9M | ¥777 | - | ¥477M ($3.1M) |
| 2023-11-29 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | strategic | 22.9M | ¥777 | -17.3% | ¥476M ($3.1M) |
| 2023-11-27 | BUY | unknown | 株式会社 麻生 ASO CORPORATION | strategic | 22.3M | ¥688 | - | ¥840M ($5.4M) |
| 2023-11-27 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | strategic | 22.3M | ¥688 | -6.5% | ¥839M ($5.4M) |
| 2023-11-24 | BUY | unknown | 株式会社 麻生 ASO CORPORATION | strategic | 21.1M | ¥646 | - | ¥678M ($4.4M) |
| 2023-11-24 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | strategic | 21.1M | ¥646 | -0.5% | ¥677M ($4.4M) |
| 2023-11-21 | SELL | Market Buy | 井村俊哉 Toshiya Imura | passive | 2.6M | ¥654 | +1.7% | ¥1.8B ($11.6M) |
| 2023-11-21 | BUY | unknown | 株式会社 麻生 ASO CORPORATION | strategic | 20.0M | ¥654 | - | ¥1.1B ($7.0M) |
| 2023-11-21 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | strategic | 20.0M | ¥654 | -1.7% | ¥1.1B ($7.0M) |
| 2023-11-21 | BUY | Market Buy | 井村俊哉 Toshiya Imura | passive | 2.6M | ¥654 | - | ¥1.8B ($11.6M) |
| 2023-11-17 | SELL | Market Buy | 井村俊哉 Toshiya Imura | passive | 5.3M | ¥617 | -4.2% | ¥656M ($4.2M) |
| 2023-11-16 | SELL | Market Buy | 井村俊哉 Toshiya Imura | passive | 6.4M | ¥582 | -10.5% | ¥1.7B ($11.3M) |
| 2023-11-16 | BUY | unknown | 株式会社 麻生 ASO CORPORATION | strategic | 18.4M | ¥582 | - | ¥1.2B ($7.6M) |
| 2023-11-16 | BUY | Market Buy | 株式会社 麻生 ASO CORPORATION | strategic | 18.4M | ¥582 | +10.5% | ¥1.2B ($7.7M) |
Showing the 50 most recent of 100 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.