Who has been buying COMSYS Holdings Corporation stock?

16 distinct investors have filed 32 disclosed large-shareholding filings in COMSYS Holdings Corporation (1721), most recently on 2026-05-13. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.

How many insider filings does COMSYS Holdings Corporation have?

COMSYS Holdings Corporation has 32 buy-side and 27 sell-side disclosures on record, covering ¥150.0B ($968.0M) in total reported value, spanning 2021-05-20 to 2026-05-13.

Where does StockDrifts get COMSYS Holdings Corporation insider data?

From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.

Do insider buys in Japanese stocks predict returns?

Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

COMSYS Holdings Corporation 1721

Company

コムシスホールディングス株式会社COMSYS Holdings Corporation

Investors

Buys

Total Value

¥150.0B ($968.0M)

Avg Return

+49.36%

Last Filing

2026-05-13

COMSYS Holdings Corporation (1721) has 32 disclosed large-shareholding filings and 27 disclosed disposals on record, filed by 16 distinct investors. Together those filings cover ¥150.0B ($968.0M) in reported transaction value. The earliest filing StockDrifts holds for COMSYS Holdings Corporation is dated 2021-05-20; the most recent is 2026-05-13. 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 +49.36%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

Date	Type	Source	Insider	Purpose	Shares	Price at filing	Return	Value
2026-07-22	SELL	unknown	アモーヴァ・アセットマネジメント株式会社	other	6.0M	¥5,229	-1.4%	¥1.9B ($11.9M)
2026-07-22	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社	other	3.5M	¥5,229	-1.4%	¥6.7B ($43.4M)
2026-05-13	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	other	7.5M	¥5,675	-4.0%	¥4.8B ($30.7M)
2026-04-20	BUY	Market Buy	三菱UFJモルガン・スタンレー証券株式会社	other	179.3K	¥5,480	+3.2%	¥982M ($6.3M)
2026-04-20	BUY	unknown	三菱UFJモルガン・スタンレー証券株式会社	other	179.3K	¥5,480	+3.2%	¥982M ($6.3M)
2026-04-20	BUY	Market Buy	三菱UFJアセットマネジメント株式会社	passive	3.6M	¥5,480	+3.2%	¥19.6B ($126.6M)
2026-04-20	BUY	Market Buy	三菱UFJ信託銀行株式会社	passive	2.2M	¥5,480	+3.2%	¥12.2B ($78.6M)
2026-04-20	BUY	Market Buy	三菱UFJアセットマネジメント株式会社	passive	3.6M	¥5,480	+3.2%	¥19.6B ($126.6M)
2026-04-20	BUY	Market Buy	三菱UFJ信託銀行株式会社	passive	2.2M	¥5,480	+3.2%	¥12.2B ($78.6M)
2026-04-07	BUY	Market Buy	野村アセットマネジメント株式会社	other	13.0M	¥5,147	+10.0%	¥7.8B ($50.5M)
2026-04-07	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	454.3K	¥5,147	+10.0%	¥425M ($2.7M)
2026-04-06	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社	other	6.4M	¥5,124	+10.5%	¥3.9B ($25.4M)
2026-04-06	BUY	Market Buy	三井住友トラスト・アセットマネジメント株式会社	other	4.8M	¥5,124	+10.5%	¥4.7B ($30.4M)
2026-03-05	SELL	Market Buy	アモーヴァ・アセットマネジメント株式会社	other	6.3M	¥5,417	-1.2%	¥34.7B ($223.7M)
2026-03-05	BUY	Market Buy	三井住友トラスト・アセットマネジメント株式会社	other	4.4M	¥5,417	+1.2%	¥24.0B ($154.8M)
2026-03-03	BUY	acquisition	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	7.5M	¥5,559	-1.4%	¥41.5B ($267.6M)
2026-01-20	SELL	unknown	野村アセットマネジメント株式会社	other	12.9M	¥4,920	-11.4%	¥70.7B ($456.3M)
2026-01-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	429.1K	¥4,920	+11.4%	¥2.4B ($15.2M)
2026-01-20	SELL	unknown	野村證券株式会社	other	121.6K	¥4,920	-11.4%	¥666M ($4.3M)
2025-09-30	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	13.0M	¥3,691	+48.5%	¥295M ($1.9M)
2025-09-30	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-445.1K	¥3,691	-48.5%	¥5.3B ($34.2M)
2025-09-30	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.4M	¥3,691	+48.5%	¥5.1B ($33.1M)
2025-09-19	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	6.4M	¥3,667	+49.4%	¥927M ($6.0M)
2025-09-19	SELL	Market Buy	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	3.0M	¥3,667	-49.4%	¥244M ($1.6M)
2025-09-01	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	57.8K	¥3,710	-47.7%	¥69.1B ($445.7M)
2025-09-01	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	12.9M	¥3,710	+47.7%	¥2.0B ($13.1M)
2025-09-01	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	996.0K	¥3,710	+47.7%	¥3.8B ($24.5M)
2025-05-08	SELL	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	6.2M	¥3,265	-67.8%	¥4.6B ($29.4M)
2025-04-21	BUY	unknown	大和アセットマネジメント株式会社 Daiwa Asset Management Co.Ltd.	other	6.8M	¥3,095	+77.1%	¥20.9B ($134.8M)
2025-03-21	SELL	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	7.6M	¥3,300	-66.1%	¥1.6B ($10.2M)
2025-03-10	SELL	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	8.1M	¥3,250	-68.6%	¥4.3B ($27.9M)
2024-06-06	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	6.1M	¥3,053	-79.5%	¥1.6B ($10.2M)
2024-06-06	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	3.1M	¥3,053	-79.5%	¥2.5B ($16.2M)
2024-04-04	SELL	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	9.4M	¥3,445	-59.1%	¥4.7B ($30.2M)
2024-02-01	SELL	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	10.8M	¥3,208	-70.8%	¥4.6B ($29.7M)
2023-06-19	BUY	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	12.2M	¥2,753	+99.1%	¥3.7B ($23.9M)
2023-05-19	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	13.1M	¥2,817	+94.5%	¥36.5B ($235.5M)
2023-05-19	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-30.7K	¥2,817	-94.5%	¥1.5B ($9.5M)
2023-05-19	SELL	unknown	大和アセットマネジメント株式会社 Daiwa Asset Management Co.Ltd.	other	5.9M	¥2,817	-94.5%	¥4.0B ($25.9M)
2023-05-19	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	256.4K	¥2,817	-94.5%	¥7.2B ($46.6M)
2023-05-15	BUY	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	11.5M	¥2,790	+96.4%	¥3.9B ($25.4M)
2023-05-01	SELL	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	3.4M	¥2,610	-110.0%	¥294M ($1.9M)
2023-05-01	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	2.0M	¥2,610	-110.0%	¥2.6B ($16.9M)
2023-05-01	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	507.4K	¥2,610	-110.0%	¥1.3B ($8.5M)
2023-02-09	BUY	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	10.1M	¥2,438	+124.8%	¥3.6B ($23.3M)
2023-01-10	BUY	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	8.6M	¥2,296	+138.7%	¥3.3B ($21.3M)
2022-06-20	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	122.3K	¥2,479	-121.1%	¥2.2B ($14.0M)
2022-06-20	SELL	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	3.5M	¥2,479	-121.1%	¥454M ($2.9M)
2022-06-20	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	3.0M	¥2,479	-121.1%	¥1.2B ($7.7M)
2022-06-20	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.0M	¥2,479	+121.1%	¥2.5B ($16.2M)

Showing the 50 most recent of 64 filings.

Frequently asked questions

Who has been buying COMSYS Holdings Corporation stock?: 16 distinct investors have filed 32 disclosed large-shareholding filings in COMSYS Holdings Corporation (1721), most recently on 2026-05-13. Each filer, their role, the number of shares and the price at filing are listed in the table on this page.
How many insider filings does COMSYS Holdings Corporation have?: COMSYS Holdings Corporation has 32 buy-side and 27 sell-side disclosures on record, covering ¥150.0B ($968.0M) in total reported value, spanning 2021-05-20 to 2026-05-13.
Where does StockDrifts get COMSYS Holdings Corporation insider data?: From EDINET large-shareholding (5%+) reports — the official filing system run by the Financial Services Agency (Japan). StockDrifts parses each disclosure and matches it to daily price history; the original filings remain available directly from EDINET.
Do insider buys in Japanese stocks predict returns?: Not uniformly. StockDrifts scored 101,000+ Japanese large-shareholding filings on fixed 12-month forward returns and found the predictive power concentrated in specific filer types and filing patterns rather than spread evenly across all disclosures.

Source 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 COMSYS Holdings Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.