Who has been buying Starts Corporation Inc. stock?

12 distinct investors have filed 7 disclosed large-shareholding filings in Starts Corporation Inc. (8850), most recently on 2026-05-12. 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 Starts Corporation Inc. have?

Starts Corporation Inc. has 7 buy-side and 7 sell-side disclosures on record, covering ¥36.7B ($236.8M) in total reported value, spanning 2021-06-10 to 2026-05-12.

Where does StockDrifts get Starts Corporation 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.

Starts Corporation Inc. 8850

Company

スターツコーポレーション株式会社Starts Corporation Inc.

Investors

Buys

Total Value

¥36.7B ($236.8M)

Avg Return

+82.45%

Last Filing

2026-05-12

Starts Corporation Inc. (8850) has 7 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥36.7B ($236.8M) in reported transaction value. The earliest filing StockDrifts holds for Starts Corporation Inc. is dated 2021-06-10; the most recent is 2026-05-12. 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 +82.45%, 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
2026-07-23	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	1.4M	¥4,660	+0.4%	¥2.5B ($16.4M)
2026-07-23	SELL	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	119.3K	¥4,660	-0.4%	¥50M ($325K)
2026-07-23	SELL	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	106.6K	¥4,660	-0.4%	¥453M ($2.9M)
2026-07-23	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	63.9K	¥4,660	+0.4%	¥25M ($162K)
2026-07-23	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	1.5M	¥4,660	+0.4%	¥352M ($2.3M)
2026-06-09	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	902.9K	¥4,420	+7.6%	¥4.0B ($25.7M)
2026-06-09	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	205.0K	¥4,420	+7.6%	¥906M ($5.8M)
2026-06-09	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	131.0K	¥4,420	+7.6%	¥579M ($3.7M)
2026-06-09	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	61.5K	¥4,420	+7.6%	¥272M ($1.8M)
2026-06-09	BUY	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	1.4M	¥4,420	+7.6%	¥6.2B ($40.0M)
2026-05-12	BUY	Market Buy	江野脇友香	passive	154.0K	¥4,700	-5.1%	¥724M ($4.7M)
2026-05-12	BUY	Market Buy	株式会社Y&J	passive	400.0K	¥4,700	-5.1%	¥1.9B ($12.1M)
2026-05-12	BUY	Market Buy	株式会社K&J	passive	400.0K	¥4,700	-5.1%	¥1.9B ($12.1M)
2026-05-12	SELL	unknown	村石純子	strategic	772.6K	¥4,700	+5.1%	¥482M ($3.1M)
2026-05-12	SELL	unknown	株式会社豊州	other	5.2M	¥4,700	+5.1%	¥1.4B ($9.0M)
2026-05-12	BUY	negotiated	村石久二	activist	4.4M	¥4,700	-5.1%	¥20.9B ($134.8M)
2026-05-12	BUY	Market Buy	石田香織	passive	154.0K	¥4,700	-5.1%	¥724M ($4.7M)
2025-11-10	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.7M	¥4,780	+2.9%	¥12.9B ($83.4M)
2025-01-10	BUY	negotiated	村石久二 muraishi hisaji	activist	4.4M	¥3,580	+37.4%	¥15.9B ($102.7M)
2025-01-10	BUY	negotiated	村石純子 Junko Muraishi	strategic	875.1K	¥3,580	+37.4%	¥3.1B ($20.2M)
2025-01-10	SELL	negotiated	株式会社豊州 Toyoshu Co., Ltd.	other	5.5M	¥3,580	-37.4%	¥5.4B ($34.7M)
2024-12-16	BUY	negotiated	村石純子 Junko Muraishi	strategic	875.1K	¥3,655	+34.6%	¥3.2B ($20.6M)
2024-12-16	BUY	negotiated	株式会社豊州 Toyoshu Co., Ltd.	other	7.0M	¥3,655	+34.6%	¥25.5B ($164.2M)
2024-12-16	BUY	negotiated	村石純子 Junko Muraishi	strategic	875.1K	¥3,655	+34.6%	¥3.2B ($20.6M)
2024-12-16	BUY	negotiated	株式会社豊州 Toyoshu Co., Ltd.	other	7.0M	¥3,655	+34.6%	¥25.5B ($164.2M)
2024-12-16	BUY	negotiated	村石久二 muraishi hisaji	activist	4.4M	¥3,655	+34.6%	¥16.3B ($104.9M)
2024-12-16	BUY	negotiated	村石久二 muraishi hisaji	activist	4.4M	¥3,655	+34.6%	¥16.3B ($104.9M)
2024-11-15	BUY	negotiated	村石純子 Junko Muraishi	strategic	875.1K	¥3,725	+32.1%	¥3.3B ($21.0M)
2024-11-15	SELL	negotiated	株式会社豊州 Toyoshu Co., Ltd.	other	7.0M	¥3,725	-32.1%	¥4.5B ($28.8M)
2024-11-15	BUY	negotiated	村石久二 muraishi hisaji	activist	4.4M	¥3,725	+32.1%	¥16.6B ($106.9M)
2023-02-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.2M	¥2,489	+97.7%	¥5.3B ($34.3M)
2023-02-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-6.8K	¥2,489	-97.7%	¥309M ($2.0M)
2022-06-24	BUY	negotiated	村石純子 Junko Muraishi	strategic	875.1K	¥2,710	+81.5%	¥2.4B ($15.3M)
2022-06-24	BUY	negotiated	株式会社豊州 Toyoshu Co., Ltd.	other	8.2M	¥2,710	+81.5%	¥22.1B ($142.8M)
2022-06-24	BUY	negotiated	村石久二 muraishi hisaji	activist	4.4M	¥2,710	+81.5%	¥12.1B ($77.7M)
2022-05-10	BUY	negotiated	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	516.3K	¥2,316	+112.4%	¥1.2B ($7.7M)
2022-05-10	BUY	negotiated	株式会社りそな銀行 Resona Bank, Limited.	strategic	2.2M	¥2,316	+112.4%	¥5.1B ($32.6M)
2021-11-05	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.6M	¥2,696	+82.5%	¥7.0B ($45.0M)
2021-11-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	119.6K	¥2,696	+82.5%	¥322M ($2.1M)
2021-10-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	2.5M	¥2,635	+86.7%	¥6.4B ($41.5M)
2021-10-07	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	79.3K	¥2,635	+86.7%	¥209M ($1.3M)
2021-07-06	BUY	negotiated	村石純子 Junko Muraishi	strategic	875.1K	¥2,879	+70.9%	¥2.5B ($16.3M)
2021-07-06	SELL	negotiated	株式会社豊州 Toyoshu Co., Ltd.	other	8.2M	¥2,879	-70.9%	¥8.6B ($55.8M)
2021-07-06	BUY	negotiated	村石久二 muraishi hisaji	activist	4.4M	¥2,879	+70.9%	¥12.8B ($82.6M)
2021-06-10	BUY	negotiated	村石純子 Junko Muraishi	strategic	875.1K	¥2,840	+73.2%	¥2.5B ($16.0M)
2021-06-10	BUY	negotiated	株式会社豊州 Toyoshu Co., Ltd.	other	11.2M	¥2,840	+73.2%	¥31.7B ($204.6M)
2021-06-10	SELL	negotiated	村石久二 muraishi hisaji	activist	4.4M	¥2,840	-73.2%	¥15M ($99K)

Frequently asked questions

Who has been buying Starts Corporation Inc. stock?: 12 distinct investors have filed 7 disclosed large-shareholding filings in Starts Corporation Inc. (8850), most recently on 2026-05-12. 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 Starts Corporation Inc. have?: Starts Corporation Inc. has 7 buy-side and 7 sell-side disclosures on record, covering ¥36.7B ($236.8M) in total reported value, spanning 2021-06-10 to 2026-05-12.
Where does StockDrifts get Starts Corporation 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 Starts Corporation Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.