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.

Where does StockDrifts get Komehyo Holdings Co.,Ltd. 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.

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. 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 +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	株式会社I-BELIEVE	strategic	1.6M	¥4,625	+17.0%	¥8.8B ($57.0M)
2026-02-27	SELL	Market Buy	株式会社KI	strategic	350.0K	¥4,625	-17.0%	¥1.9B ($12.2M)
2026-02-27	BUY	Market Buy	石原卓児	strategic	329.1K	¥4,625	+17.0%	¥1.8B ($11.5M)
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	-90.5%	¥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	-78.0%	¥462M ($3.0M)
2024-11-20	BUY	Market Buy	石原卓児 Takuji Ishihara	strategic	325.3K	¥3,600	+50.3%	¥16M ($105K)
2024-11-20	BUY	Market Buy	株式会社KI KI	strategic	923.3K	¥3,600	+50.3%	¥3.3B ($21.4M)
2024-11-20	BUY	Market Buy	株式会社I-BELIEVE I-BELIEVE Co., Ltd.	strategic	1.1M	¥3,600	+50.3%	¥648M ($4.2M)
2024-07-22	SELL	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	8.3K	¥4,805	-12.6%	¥146M ($942K)
2024-07-22	SELL	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	0	¥4,805	-12.6%	¥233M ($1.5M)
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	+12.6%	¥779M ($5.0M)
2024-01-22	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	38.5K	¥4,670	+15.8%	¥180M ($1.2M)
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	+15.8%	¥228M ($1.5M)
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	+15.8%	¥2.8B ($18.0M)
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	-39.6%	¥183M ($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	+39.6%	¥1.3B ($8.4M)
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	+23.4%	¥15M ($96K)
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	-23.4%	¥558M ($3.6M)
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	-23.4%	¥795M ($5.1M)
2023-06-21	SELL	unknown	株式会社SI SI Co.,Ltd.	strategic	377.2K	¥4,350	-24.4%	¥872M ($5.6M)
2023-06-21	BUY	unknown	株式会社SI SI Co.,Ltd.	strategic	377.2K	¥4,350	+24.4%	¥872M ($5.6M)
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	+48.0%	¥218M ($1.4M)
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	+48.0%	¥214M ($1.4M)
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	+101.8%	¥201M ($1.3M)
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	+101.8%	¥1.4B ($9.0M)
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	+127.3%	¥1.4B ($8.8M)
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	-392.7%	¥23M ($152K)
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	+392.7%	¥524M ($3.4M)

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.
Where does StockDrifts get Komehyo Holdings Co.,Ltd. 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 Komehyo Holdings Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.