Who has been buying Sega Sammy Holdings Inc. stock?

13 distinct investors have filed 26 disclosed large-shareholding filings in Sega Sammy Holdings Inc. (6460), most recently on 2026-05-11. 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 Sega Sammy Holdings Inc. have?

Sega Sammy Holdings Inc. has 26 buy-side and 11 sell-side disclosures on record, covering ¥67.6B ($435.9M) in total reported value, spanning 2022-10-06 to 2026-05-11.

Where does StockDrifts get Sega Sammy Holdings Inc. 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.

Sega Sammy Holdings Inc. 6460

Company

セガサミーホールディングス株式会社Sega Sammy Holdings Inc.

Investors

Buys

Total Value

¥67.6B ($435.9M)

Avg Return

+11.38%

Last Filing

2026-05-11

Sega Sammy Holdings Inc. (6460) has 26 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥67.6B ($435.9M) in reported transaction value. The earliest filing StockDrifts holds for Sega Sammy Holdings Inc. is dated 2022-10-06; the most recent is 2026-05-11. 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 +11.38%, 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
2026-06-30	BUY	unknown	里見治	strategic	14.4K	¥2,207.5	+20.1%	¥32M ($205K)
2026-06-30	BUY	Market Buy	株式会社MS Company	strategic	803.1K	¥2,207.5	+20.1%	¥519M ($3.3M)
2026-06-30	BUY	block_purchase	合同会社HS Company	strategic	41.2M	¥2,207.5	+20.1%	¥3.2B ($20.4M)
2026-06-30	BUY	Market Buy	合同会社Haruki Satomi Company	strategic	3.9M	¥2,207.5	+20.1%	¥283M ($1.8M)
2026-06-30	BUY	Market Buy	合同会社Hajime Satomi Company	strategic	4.2M	¥2,207.5	+20.1%	¥330M ($2.1M)
2026-06-30	BUY	Market Buy	株式会社YS Company	strategic	827.0K	¥2,207.5	+20.1%	¥566M ($3.6M)
2026-06-30	BUY	Market Buy	合同会社エフエスシー	strategic	14.6M	¥2,207.5	+20.1%	¥3.0B ($19.5M)
2026-06-30	SELL	unknown	里見美恵子	strategic	36	¥2,207.5	-20.1%	¥1.9B ($12.2M)
2026-06-19	BUY	Market Buy	ウエリントン・マネージメント・ジャパン・ピーティーイー・リミテッド Wellington Management Japan Pte Ltd	other	7.5M	¥2,114.5	+18.6%	¥2.2B ($14.3M)
2026-06-19	BUY	Market Buy	ウエリントン・マネージメント・カンパニー・エルエルピー Wellington Management Company LLP	other	6.1M	¥2,114.5	+18.6%	¥2.4B ($15.4M)
2026-05-20	BUY	unknown	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	11.0M	¥2,293.5	-4.5%	¥25.1B ($162.1M)
2026-05-11	BUY	unknown	ウエリントン・マネージメント・ジャパン・ピーティーイー・リミテッド Wellington Management Japan Pte Ltd	other	6.5M	¥2,309.5	+3.4%	¥14.9B ($96.2M)
2026-05-11	BUY	unknown	ウエリントン・マネージメント・カンパニー・エルエルピー Wellington Management Company LLP	other	4.9M	¥2,309.5	+3.4%	¥11.4B ($73.5M)
2026-05-11	BUY	unknown	野村アセットマネジメント株式会社	other	10.4M	¥2,309.5	+3.4%	¥23.9B ($154.4M)
2026-05-11	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	108.0K	¥2,309.5	+3.4%	¥249M ($1.6M)
2026-05-11	BUY	unknown	野村證券株式会社	other	375.1K	¥2,309.5	+3.4%	¥866M ($5.6M)
2026-05-08	BUY	unknown	合同会社Haruki Satomi Company	strategic	3.9M	¥2,300	+3.8%	¥9.0B ($58.0M)
2026-05-08	BUY	unknown	合同会社Hajime Satomi Company	strategic	4.2M	¥2,300	+3.8%	¥9.6B ($61.8M)
2026-05-08	BUY	unknown	株式会社YS Company	strategic	600.0K	¥2,300	+3.8%	¥1.4B ($8.9M)
2026-05-08	BUY	unknown	株式会社MS Company	strategic	600.0K	¥2,300	+3.8%	¥1.4B ($8.9M)
2026-05-08	BUY	block_purchase	合同会社HS Company	strategic	41.2M	¥2,300	+3.8%	¥4.3B ($27.9M)
2026-05-08	BUY	unknown	合同会社エフエスシー	strategic	13.7M	¥2,300	+3.8%	¥31.5B ($203.0M)
2026-05-08	SELL	unknown	里見治	strategic	14.4K	¥2,300	-3.8%	¥9.6B ($61.7M)
2026-05-08	BUY	unknown	合同会社Haruki Satomi Company	strategic	3.9M	¥2,300	+3.8%	¥9.0B ($58.0M)
2026-05-08	BUY	unknown	合同会社Hajime Satomi Company	strategic	4.2M	¥2,300	+3.8%	¥9.6B ($61.8M)
2026-05-08	BUY	unknown	株式会社YS Company	strategic	600.0K	¥2,300	+3.8%	¥1.4B ($8.9M)
2026-05-08	BUY	unknown	株式会社MS Company	strategic	600.0K	¥2,300	+3.8%	¥1.4B ($8.9M)
2026-05-08	BUY	block_purchase	合同会社HS Company	strategic	41.2M	¥2,300	+3.8%	¥4.3B ($27.9M)
2026-05-08	BUY	unknown	合同会社エフエスシー	strategic	13.7M	¥2,300	+3.8%	¥31.5B ($203.0M)
2026-05-08	BUY	unknown	里見美恵子	strategic	887.4K	¥2,300	+3.8%	¥2.0B ($13.2M)
2026-05-08	SELL	unknown	里見治	strategic	14.4K	¥2,300	-3.8%	¥9.6B ($61.7M)
2026-05-08	BUY	unknown	里見美恵子	strategic	887.4K	¥2,300	+3.8%	¥2.0B ($13.2M)
2025-11-25	BUY	Market Buy	株式会社YS Company	strategic	600.0K	¥2,646.5	-4.6%	¥1.5B ($9.8M)
2025-11-25	BUY	Market Buy	株式会社MS Company	strategic	600.0K	¥2,646.5	-4.6%	¥1.5B ($9.8M)
2025-11-25	BUY	Market Buy	合同会社HS Company	strategic	39.3M	¥2,646.5	-4.6%	¥99.2B ($640.0M)
2025-11-25	BUY	Market Buy	合同会社エフエスシー	strategic	13.7M	¥2,646.5	-4.6%	¥34.5B ($222.9M)
2025-11-25	BUY	Market Buy	里見美恵子	strategic	887.4K	¥2,646.5	-4.6%	¥2.2B ($14.5M)
2025-11-25	BUY	Market Buy	里見治	strategic	4.2M	¥2,646.5	-4.6%	¥10.5B ($68.1M)
2025-11-19	BUY	unknown	株式会社YS Company YS Company Co., Ltd.	strategic	600.0K	¥2,543.5	-0.8%	¥1.5B ($9.8M)
2025-11-19	BUY	unknown	株式会社MS Company MS Company Co., Ltd.	strategic	600.0K	¥2,543.5	-0.8%	¥1.5B ($9.8M)
2025-11-19	BUY	unknown	合同会社HS Company HS Company LLC	strategic	39.0M	¥2,543.5	-0.8%	¥99.2B ($640.1M)
2025-11-19	BUY	unknown	合同会社エフエスシー LLC LLC	strategic	13.7M	¥2,543.5	-0.8%	¥34.8B ($224.5M)
2025-11-19	BUY	unknown	里見美恵子 Mieko Satomi	strategic	887.4K	¥2,543.5	-0.8%	¥2.3B ($14.6M)
2025-11-19	BUY	unknown	株式会社YS Company YS Company Co., Ltd.	strategic	600.0K	¥2,543.5	-0.8%	¥1.5B ($9.8M)
2025-11-19	BUY	unknown	株式会社MS Company MS Company Co., Ltd.	strategic	600.0K	¥2,543.5	-0.8%	¥1.5B ($9.8M)
2025-11-19	BUY	unknown	合同会社HS Company HS Company LLC	strategic	39.0M	¥2,543.5	-0.8%	¥99.2B ($640.1M)
2025-11-19	BUY	unknown	合同会社エフエスシー LLC LLC	strategic	13.7M	¥2,543.5	-0.8%	¥34.8B ($224.5M)
2025-11-19	BUY	unknown	里見美恵子 Mieko Satomi	strategic	887.4K	¥2,543.5	-0.8%	¥2.3B ($14.6M)
2025-11-19	SELL	unknown	里見治 Hajime Satomi	strategic	4.2M	¥2,543.5	+0.8%	¥123M ($792K)
2025-11-19	SELL	unknown	里見治 Hajime Satomi	strategic	4.2M	¥2,543.5	+0.8%	¥123M ($792K)

Showing the 50 most recent of 80 filings.

Frequently asked questions

Who has been buying Sega Sammy Holdings Inc. stock?: 13 distinct investors have filed 26 disclosed large-shareholding filings in Sega Sammy Holdings Inc. (6460), most recently on 2026-05-11. 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 Sega Sammy Holdings Inc. have?: Sega Sammy Holdings Inc. has 26 buy-side and 11 sell-side disclosures on record, covering ¥67.6B ($435.9M) in total reported value, spanning 2022-10-06 to 2026-05-11.
Where does StockDrifts get Sega Sammy Holdings Inc. 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 Sega Sammy Holdings Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.