StockDriftsStockDriftsMEC Company Ltd. (4971) has 57 disclosed large-shareholding filings and 32 disclosed disposals on record, filed by 22 distinct investors. Together those filings cover ¥38.8B ($250.4M) in reported transaction value. The earliest filing StockDrifts holds for MEC Company Ltd. is dated 2021-06-18; the most recent is 2026-01-22. 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 +151.78%, measured from each filing date to the latest available close.
| Date | Type | Source | Insider | Purpose | Shares | Price at filing | Return | Value |
|---|---|---|---|---|---|---|---|---|
| 2026-01-22 | SELL | unknown | 三井住友DSアセットマネジメント株式会社 | passive | 664.3K | ¥5,650 | -48.8% | ¥5.6B ($36.0M) |
| 2026-01-22 | BUY | unknown | 株式会社 三井住友銀行 | other | 40.0K | ¥5,650 | -48.8% | ¥336M ($2.2M) |
| 2026-01-22 | SELL | unknown | SMBC日興証券株式会社 | other | 27.8K | ¥5,650 | -48.8% | ¥234M ($1.5M) |
| 2025-12-05 | BUY | Market Buy | SMBC日興証券株式会社 | other | 283.6K | ¥5,300 | +58.7% | ¥2.4B ($15.4M) |
| 2025-12-05 | BUY | Market Buy | 株式会社 三井住友銀行 | other | 40.0K | ¥5,300 | +58.7% | ¥336M ($2.2M) |
| 2025-12-05 | BUY | Market Buy | 三井住友DSアセットマネジメント株式会社 | passive | 806.8K | ¥5,300 | +58.7% | ¥6.8B ($43.8M) |
| 2025-12-03 | SELL | unknown | ウエリントン・マネージメント・ホンコン・リミテッド(Wellington Management Hong Kong Ltd) Wellington Management Hong Kong Ltd | other | 632.3K | ¥5,210 | -61.4% | ¥2.0B ($13.1M) |
| 2025-10-07 | BUY | unknown | ウエリントン・マネージメント・ホンコン・リミテッド(Wellington Management Hong Kong Ltd) Wellington Management Hong Kong Ltd | other | 1.0M | ¥4,105 | +104.9% | ¥4.2B ($27.1M) |
| 2025-04-07 | SELL | 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 | 904.7K | ¥1,815 | -363.4% | ¥1.3B ($8.2M) |
| 2025-03-07 | SELL | unknown | みずほ証券 株式会社 Mizuho Securities Co., Ltd. | other | 12.8K | ¥2,539 | -231.2% | ¥36M ($230K) |
| 2025-03-07 | BUY | unknown | 株式会社みずほ銀行 Mizuho Bank, Ltd. | strategic | 56.0K | ¥2,539 | +231.2% | ¥142M ($917K) |
| 2025-03-07 | BUY | unknown | アセットマネジメントOne株式会社 Asset Management One Co., Ltd. | other | 828.4K | ¥2,539 | +231.2% | ¥2.1B ($13.4M) |
| 2025-02-07 | 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 | 1.6M | ¥3,105 | +170.8% | ¥5.0B ($32.2M) |
| 2025-01-20 | SELL | negotiated | 三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd. | other | 30.7K | ¥3,430 | -145.2% | ¥1.6B ($10.1M) |
| 2025-01-20 | BUY | negotiated | 三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc. | passive | 183.0K | ¥3,430 | +145.2% | ¥7M ($44K) |
| 2025-01-20 | BUY | negotiated | 株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc. | strategic | 96.0K | ¥3,430 | +145.2% | ¥329M ($2.1M) |
| 2025-01-20 | BUY | negotiated | 三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc. | passive | 401.0K | ¥3,430 | +145.2% | ¥103M ($666K) |
| 2024-12-20 | 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 | 1.6M | ¥3,225 | +160.8% | ¥5.2B ($33.4M) |
| 2024-12-16 | BUY | negotiated | 三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc. | passive | 181.3K | ¥3,230 | +160.4% | ¥586M ($3.8M) |
| 2024-12-16 | BUY | negotiated | 三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd. | other | 486.6K | ¥3,230 | +160.4% | ¥1.6B ($10.1M) |
| 2024-12-16 | BUY | negotiated | 三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc. | passive | 370.6K | ¥3,230 | +160.4% | ¥1.2B ($7.7M) |
| 2024-12-16 | BUY | negotiated | 株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc. | strategic | 96.0K | ¥3,230 | +160.4% | ¥310M ($2.0M) |
| 2024-09-20 | BUY | unknown | 日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd. | other | 291.4K | ¥3,710 | +126.7% | ¥171M ($1.1M) |
| 2024-09-20 | SELL | unknown | 三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd. | other | 633.6K | ¥3,710 | -126.7% | ¥975M ($6.3M) |
| 2024-07-22 | 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 | 1.6M | ¥4,090 | +105.6% | ¥6.6B ($42.4M) |
| 2024-06-07 | 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 | 1.6M | ¥4,225 | +99.0% | ¥6.8B ($43.8M) |
| 2024-05-22 | BUY | unknown | アセットマネジメントOne株式会社 Asset Management One Co., Ltd. | other | 1.1M | ¥4,315 | +94.9% | ¥4.5B ($29.1M) |
| 2024-05-22 | BUY | unknown | みずほ証券 株式会社 Mizuho Securities Co., Ltd. | other | 25.6K | ¥4,315 | +94.9% | ¥110M ($713K) |
| 2024-05-22 | BUY | unknown | 株式会社みずほ銀行 Mizuho Bank, Ltd. | strategic | 56.0K | ¥4,315 | +94.9% | ¥242M ($1.6M) |
| 2024-05-08 | BUY | unknown | 三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd. | other | 897.3K | ¥3,845 | +118.7% | ¥3.5B ($22.3M) |
| 2024-05-08 | BUY | unknown | 日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd. | other | 244.8K | ¥3,845 | +118.7% | ¥941M ($6.1M) |
| 2024-01-19 | SELL | unknown | 日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd. | other | 236.5K | ¥4,260 | -97.4% | ¥308M ($2.0M) |
| 2024-01-19 | SELL | unknown | 三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd. | other | 667.7K | ¥4,260 | -97.4% | ¥393M ($2.5M) |
| 2023-09-25 | BUY | unknown | アセットマネジメントOne株式会社 Asset Management One Co., Ltd. | other | 1.3M | ¥3,965 | +112.1% | ¥5.0B ($32.3M) |
| 2023-09-25 | BUY | unknown | 株式会社みずほ銀行 Mizuho Bank, Ltd. | strategic | 56.0K | ¥3,965 | +112.1% | ¥222M ($1.4M) |
| 2023-08-22 | 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 | 1.6M | ¥3,685 | +128.2% | ¥1.2B ($7.4M) |
| 2023-08-07 | 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 | 1.3M | ¥3,510 | +139.6% | ¥4.5B ($29.3M) |
| 2023-08-03 | SELL | Market Buy | ジェー・ピー・モルガン・アセット・マネジメント(チャイナ)・カンパニー・リミテッドCompany Limited) JPMorgan Asset Management (China | other | 0 | ¥3,510 | -139.6% | ¥77M ($500K) |
| 2023-08-03 | BUY | Market Buy | ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC | other | 4.1K | ¥3,510 | +139.6% | ¥704M ($4.5M) |
| 2023-08-03 | SELL | Market Buy | ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc | other | 58.0K | ¥3,510 | -139.6% | ¥542M ($3.5M) |
| 2023-08-03 | BUY | Market Buy | JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd. | other | 33.0K | ¥3,510 | +139.6% | ¥116M ($747K) |
| 2023-08-03 | BUY | Market Buy | JPモルガン・アセット・マネジメント株式会社 JPMorgan Asset Management (Japan) Limited | passive | 711.1K | ¥3,510 | +139.6% | ¥2.5B ($15.9M) |
| 2023-07-19 | BUY | Market Buy | ジェー・ピー・モルガン・アセット・マネジメント(チャイナ)・カンパニー・リミテッドCompany Limited) JPMorgan Asset Management (China | other | 23.0K | ¥3,640 | +131.0% | ¥84M ($540K) |
| 2023-07-19 | SELL | Market Buy | ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC | other | 1.8K | ¥3,640 | -131.0% | ¥7M ($47K) |
| 2023-07-19 | BUY | Market Buy | ジェー・ピー・モルガン・セキュリティーズ・ピーエルシー J.P. Morgan Securities plc | other | 213.6K | ¥3,640 | +131.0% | ¥6M ($36K) |
| 2023-07-19 | BUY | Market Buy | JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd. | other | 10.7K | ¥3,640 | +131.0% | ¥36M ($231K) |
| 2023-07-19 | BUY | Market Buy | JPモルガン・アセット・マネジメント株式会社 JPMorgan Asset Management (Japan) Limited | passive | 944.6K | ¥3,640 | +131.0% | ¥34M ($219K) |
| 2023-07-05 | BUY | Market Buy | JPモルガン証券株式会社 JPMorgan Securities Japan Co., Ltd. | other | 19.6K | ¥3,645 | +130.7% | ¥72M ($462K) |
| 2023-07-05 | BUY | Market Buy | ジェー・ピー・モルガン・アセット・マネジメント(チャイナ)・カンパニー・リミテッドCompany Limited) JPMorgan Asset Management (China | other | 23.0K | ¥3,645 | +130.7% | ¥84M ($541K) |
| 2023-07-05 | BUY | Market Buy | ジェー・ピー・モルガン・セキュリティーズ・エルエルシー J.P. Morgan Securities LLC | other | 4.4K | ¥3,645 | +130.7% | ¥16M ($103K) |
Showing the 50 most recent of 118 filings.
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 MEC Company Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.