Who has been buying TOMONY Holdings, Inc. stock?

6 distinct investors have filed 10 disclosed large-shareholding filings in TOMONY Holdings, Inc. (8600), most recently on 2025-09-22. 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 TOMONY Holdings, Inc. have?

TOMONY Holdings, Inc. has 10 buy-side and 5 sell-side disclosures on record, covering ¥3.5B ($22.5M) in total reported value, spanning 2022-04-06 to 2025-09-22.

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.

TOMONY Holdings, Inc. 8600

Company

トモニホールディングス株式会社TOMONY Holdings, Inc.

Investors

Buys

Total Value

¥3.5B ($22.5M)

Avg Return

+110.05%

Last Filing

2025-09-22

TOMONY Holdings, Inc. (8600) has 10 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥3.5B ($22.5M) in reported transaction value. The earliest filing StockDrifts holds for TOMONY Holdings, Inc. is dated 2022-04-06; the most recent is 2025-09-22. Across these filings the average return since disclosure is +110.05%, 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
2025-09-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	878.7K	¥664	+78.2%	¥26M ($166K)
2025-09-22	BUY	unknown	野村ホールディングス株式会社 Nomura Holdings, Inc.	strategic	100	¥664	-	-
2025-09-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	159.0K	¥664	-78.2%	¥822M ($5.3M)
2025-09-22	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	6.7M	¥664	-78.2%	¥501M ($3.2M)
2025-05-22	BUY	unknown	野村ホールディングス株式会社 Nomura Holdings, Inc.	strategic	100	¥535	+121.1%	¥54K ($345)
2025-05-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.4M	¥535	+121.1%	¥751M ($4.8M)
2025-05-22	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	7.4M	¥535	+121.1%	¥4.0B ($25.7M)
2025-05-22	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	835.5K	¥535	+121.1%	¥447M ($2.9M)
2024-07-04	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	6.4M	¥421	-181.0%	¥929M ($6.0M)
2024-07-04	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	3.1M	¥421	+181.0%	¥41M ($263K)
2024-01-19	SELL	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	3.0M	¥387	-205.7%	¥22M ($145K)
2024-01-19	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	8.6M	¥387	+205.7%	¥210M ($1.4M)
2023-12-21	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	6.8M	¥373	-217.2%	¥293M ($1.9M)
2023-12-21	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	2.5M	¥373	+217.2%	¥98M ($630K)
2022-04-06	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 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	7.6M	¥326	+262.9%	¥427M ($2.8M)
2022-04-06	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	2.3M	¥326	+262.9%	¥128M ($826K)

Frequently asked questions

Who has been buying TOMONY Holdings, Inc. stock?: 6 distinct investors have filed 10 disclosed large-shareholding filings in TOMONY Holdings, Inc. (8600), most recently on 2025-09-22. 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 TOMONY Holdings, Inc. have?: TOMONY Holdings, Inc. has 10 buy-side and 5 sell-side disclosures on record, covering ¥3.5B ($22.5M) in total reported value, spanning 2022-04-06 to 2025-09-22.
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.