Who has been buying Komehyo Holdings Co.,Ltd. stock?

10 distinct investors have filed 16 disclosed large-shareholding filings in Komehyo Holdings Co.,Ltd. (2780), most recently on 2026-02-27. 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 Komehyo Holdings Co.,Ltd. have?

Komehyo Holdings Co.,Ltd. has 16 buy-side and 10 sell-side disclosures on record, covering ¥16.0B ($103.5M) in total reported value, spanning 2021-05-20 to 2026-02-27.

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.

Komehyo Holdings Co.,Ltd. 2780

Company

株式会社コメ兵ホールディングスKomehyo Holdings Co.,Ltd.

Investors

Buys

Total Value

¥16.0B ($103.5M)

Avg Return

+67.33%

Last Filing

2026-02-27

Komehyo Holdings Co.,Ltd. (2780) has 16 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥16.0B ($103.5M) in reported transaction value. The earliest filing StockDrifts holds for Komehyo Holdings Co.,Ltd. is dated 2021-05-20; the most recent is 2026-02-27. Across these filings the average return since disclosure is +67.33%, 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
2026-02-27	BUY	Market Buy	石原卓児	strategic	329.1K	¥4,625	-2.9%	¥16M ($101K)
2026-02-27	SELL	Market Buy	株式会社KI	strategic	350.0K	¥4,625	+2.9%	¥2.7B ($17.1M)
2026-02-27	BUY	Market Buy	株式会社I-BELIEVE	strategic	1.6M	¥4,625	-2.9%	¥2.7B ($17.1M)
2025-03-06	SELL	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	399.7K	¥2,840	-58.1%	¥595M ($3.8M)
2025-02-20	SELL	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	608.7K	¥3,040	-47.7%	¥462M ($3.0M)
2024-11-20	BUY	Market Buy	株式会社KI KI	strategic	923.3K	¥3,600	-	-
2024-11-20	BUY	Market Buy	株式会社I-BELIEVE I-BELIEVE Co., Ltd.	strategic	1.1M	¥3,600	+24.7%	¥648M ($4.2M)
2024-11-20	BUY	Market Buy	石原卓児 Takuji Ishihara	strategic	325.3K	¥3,600	+24.7%	¥16M ($105K)
2024-07-22	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	760.5K	¥4,805	-6.6%	¥779M ($5.0M)
2024-07-22	SELL	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	0	¥4,805	+6.6%	¥233M ($1.5M)
2024-07-22	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	8.3K	¥4,805	+6.6%	¥146M ($942K)
2024-01-22	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	598.6K	¥4,670	-3.9%	¥2.8B ($18.0M)
2024-01-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	48.7K	¥4,670	-3.9%	¥228M ($1.5M)
2024-01-22	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	38.5K	¥4,670	-3.9%	¥180M ($1.2M)
2023-12-21	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	340.8K	¥3,875	+15.9%	¥1.3B ($8.4M)
2023-12-21	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	91.6K	¥3,875	-15.9%	¥183M ($1.2M)
2023-07-21	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	450.7K	¥4,385	-2.4%	¥558M ($3.6M)
2023-07-21	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	138.0K	¥4,385	+2.4%	¥15M ($96K)
2023-07-21	SELL	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	392.0K	¥4,385	-2.4%	¥795M ($5.1M)
2023-06-21	BUY	unknown	株式会社SI SI Co.,Ltd.	strategic	377.2K	¥4,350	-	¥872M ($5.6M)
2023-06-21	SELL	unknown	株式会社SI SI Co.,Ltd.	strategic	377.2K	¥4,350	-3.2%	¥872M ($5.6M)
2023-05-19	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 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	577.6K	¥3,655	+22.9%	¥214M ($1.4M)
2023-05-19	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	135.0K	¥3,655	+22.9%	¥218M ($1.4M)
2022-09-06	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	518.6K	¥2,681	+67.5%	¥1.4B ($9.0M)
2022-09-06	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	75.0K	¥2,681	+67.5%	¥201M ($1.3M)
2022-08-19	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	573.3K	¥2,380	+88.7%	¥1.4B ($8.8M)
2021-05-20	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	483.2K	¥1,098	+308.9%	¥524M ($3.4M)
2021-05-20	SELL	unknown	Sumitomo Mitsui TrustLimited (三井住友信託(香港)有限公司) Hong Kong	unknown	0	¥1,098	-308.9%	¥23M ($152K)

Frequently asked questions

Who has been buying Komehyo Holdings Co.,Ltd. stock?: 10 distinct investors have filed 16 disclosed large-shareholding filings in Komehyo Holdings Co.,Ltd. (2780), most recently on 2026-02-27. 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 Komehyo Holdings Co.,Ltd. have?: Komehyo Holdings Co.,Ltd. has 16 buy-side and 10 sell-side disclosures on record, covering ¥16.0B ($103.5M) in total reported value, spanning 2021-05-20 to 2026-02-27.
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.

More on this data

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.