Who has been buying Olympic Group Corporation stock?

8 distinct investors have filed 6 disclosed large-shareholding filings in Olympic Group Corporation (8289), most recently on 2026-01-23. 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 Olympic Group Corporation have?

Olympic Group Corporation has 6 buy-side and 6 sell-side disclosures on record, covering ¥15.4B ($99.2M) in total reported value, spanning 2021-03-22 to 2026-01-23.

Where does StockDrifts get Olympic Group Corporation 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.

Olympic Group Corporation 8289

Company

株式会社OlympicグループOlympic Group Corporation

Investors

Buys

Total Value

¥15.4B ($99.2M)

Avg Return

+116.39%

Last Filing

2026-01-23

Olympic Group Corporation (8289) has 6 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥15.4B ($99.2M) in reported transaction value. The earliest filing StockDrifts holds for Olympic Group Corporation is dated 2021-03-22; the most recent is 2026-01-23. 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 +116.39%, 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
2026-06-22	BUY	unknown	ゴールドマン・サックス・アンド・カンパニー・エルエルシー Goldman Sachs & Co. LLC	other	0	¥947	+0.5%	-
2026-06-22	BUY	Market Buy	ゴールドマン・サックス・インターナショナル Goldman Sachs International	other	1.5M	¥947	+0.5%	¥234M ($1.5M)
2026-06-22	BUY	unknown	ゴールドマン・サックス証券株式会社	other	0	¥947	+0.5%	-
2026-06-12	SELL	Market Buy	株式会社銀座山形屋	passive	196.7K	¥1,004	+5.2%	¥281M ($1.8M)
2026-06-12	BUY	unknown	株式会社カネヨシ	other	6.4M	¥1,004	-5.2%	¥6.4B ($41.4M)
2026-06-05	BUY	unknown	ゴールドマン・サックス・アンド・カンパニー・エルエルシー Goldman Sachs & Co. LLC	other	0	¥979	-2.8%	-
2026-06-05	BUY	unknown	ゴールドマン・サックス・インターナショナル Goldman Sachs International	other	1.3M	¥979	-2.8%	¥1.3B ($8.1M)
2026-06-05	BUY	unknown	ゴールドマン・サックス証券株式会社	other	0	¥979	-2.8%	-
2026-06-03	SELL	Market Buy	株式会社銀座山形屋	passive	475.3K	¥968	+1.6%	¥226M ($1.5M)
2026-06-03	BUY	unknown	株式会社カネヨシ	other	6.4M	¥968	-1.6%	¥6.2B ($39.9M)
2026-05-19	BUY	unknown	株式会社カネヨシ	other	6.4M	¥1,038	-3.3%	¥6.6B ($42.8M)
2026-05-19	SELL	Market Buy	株式会社銀座山形屋	passive	709.3K	¥1,038	+3.3%	¥250M ($1.6M)
2026-01-23	BUY	unknown	株式会社銀座山形屋	passive	949.4K	¥467	-139.2%	¥1.1B ($6.8M)
2026-01-23	SELL	unknown	株式会社グゥー	other	0	¥467	-139.2%	-
2026-01-23	BUY	unknown	株式会社カネヨシ	other	6.4M	¥467	+139.2%	¥7.1B ($46.1M)
2026-01-23	BUY	Market Buy	株式会社銀座山形屋	passive	949.4K	¥467	-139.2%	¥1.1B ($6.8M)
2026-01-23	SELL	Market Buy	株式会社グゥー	other	0	¥467	-139.2%	-
2026-01-23	BUY	Market Buy	株式会社カネヨシ	other	6.4M	¥467	+139.2%	¥7.1B ($46.1M)
2025-12-12	BUY	Market Buy	Olympic取引先持株会理事長武井泰士 Yasushi Takei	passive	2.0M	¥422	+164.7%	¥100M ($642K)
2022-10-26	BUY	Market Buy	Olympic取引先持株会理事長武井泰士 Yasushi Takei	passive	1.8M	¥513	+117.7%	¥917M ($5.9M)
2022-10-26	SELL	unknown	Olympic取引先持株会理事長木下紀夫 Norio Kinoshita	unknown	0	¥513	-117.7%	¥930M ($6.0M)
2022-08-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	139.9K	¥603	-85.2%	¥55M ($354K)
2022-08-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	918.1K	¥603	+85.2%	¥547M ($3.5M)
2021-03-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	231.2K	¥733.485	-52.3%	¥53M ($343K)
2021-03-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	6.7K	¥733.485	+52.3%	¥439M ($2.8M)
2021-03-22	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	1.1M	¥733.485	-52.3%	¥63M ($409K)

Frequently asked questions

Who has been buying Olympic Group Corporation stock?: 8 distinct investors have filed 6 disclosed large-shareholding filings in Olympic Group Corporation (8289), most recently on 2026-01-23. 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 Olympic Group Corporation have?: Olympic Group Corporation has 6 buy-side and 6 sell-side disclosures on record, covering ¥15.4B ($99.2M) in total reported value, spanning 2021-03-22 to 2026-01-23.
Where does StockDrifts get Olympic Group Corporation 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 Olympic Group Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.