Who has been buying Orchestra Holdings Inc. stock?

4 distinct investors have filed 4 disclosed large-shareholding filings in Orchestra Holdings Inc. (6533), most recently on 2026-02-04. 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 Orchestra Holdings Inc. have?

Orchestra Holdings Inc. has 4 buy-side and 25 sell-side disclosures on record, covering ¥236M ($1.5M) in total reported value, spanning 2021-03-30 to 2026-02-04.

Where does StockDrifts get Orchestra 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.

Orchestra Holdings Inc. 6533

Company

株式会社Orchestra HoldingsOrchestra Holdings Inc.

Investors

Buys

Total Value

¥236M ($1.5M)

Avg Return

-24.12%

Last Filing

2026-02-04

Orchestra Holdings Inc. (6533) has 4 disclosed large-shareholding filings and 25 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥236M ($1.5M) in reported transaction value. The earliest filing StockDrifts holds for Orchestra Holdings Inc. is dated 2021-03-30; the most recent is 2026-02-04. 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 -24.12%, 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
2026-02-04	BUY	unknown	ＴＳＫ　ｃａｐｉｔａｌ株式会社 TSK capital	activist	2.4M	¥1,191	-9.7%	¥2.8B ($18.1M)
2026-02-04	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥1,191	-9.7%	¥923M ($6.0M)
2026-02-04	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.6M	¥1,191	+9.7%	¥170M ($1.1M)
2025-03-05	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥769	+39.9%	¥596M ($3.8M)
2025-03-05	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.7M	¥769	-39.9%	¥86M ($553K)
2024-12-11	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.8M	¥812	-32.5%	¥795K ($5K)
2024-12-11	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.6M	¥812	-32.5%	¥814K ($5K)
2024-12-11	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.7M	¥812	-32.5%	¥2M ($15K)
2024-12-11	BUY	Market Buy	佐藤亨樹 Toshiki Sato	activist	2.8M	¥812	+32.5%	¥30M ($195K)
2024-12-11	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	2.8M	¥812	+32.5%	¥2.2B ($14.5M)
2024-08-23	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	1.8M	¥950	+13.3%	¥1.8B ($11.3M)
2024-08-23	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	2.6M	¥950	+13.3%	¥2.5B ($16.1M)
2024-08-05	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.8M	¥911	-18.1%	¥53M ($342K)
2024-08-05	SELL	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥911	-18.1%	¥16M ($100K)
2024-08-05	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	2.6M	¥911	+18.1%	¥61M ($395K)
2024-01-12	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	2.7M	¥1,017	+5.8%	¥2.7B ($17.4M)
2024-01-12	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	2.7M	¥1,017	+5.8%	¥2.7B ($17.4M)
2024-01-12	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	1.9M	¥1,017	+5.8%	¥1.9B ($12.3M)
2024-01-12	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	1.9M	¥1,017	+5.8%	¥1.9B ($12.3M)
2024-01-12	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥1,017	+5.8%	¥788M ($5.1M)
2024-01-12	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥1,017	+5.8%	¥788M ($5.1M)
2023-08-09	BUY	Market Buy	中村慶郎 Yoshiro Nakamura	activist	2.0M	¥1,170	-8.0%	¥32M ($208K)
2023-05-25	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.9M	¥1,207	+10.8%	¥53M ($344K)
2023-05-25	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.9M	¥1,207	+10.8%	¥2M ($15K)
2023-05-25	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥1,207	-10.8%	¥936M ($6.0M)
2023-05-25	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥1,207	-10.8%	¥936M ($6.0M)
2023-05-25	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.9M	¥1,207	+10.8%	¥56M ($359K)
2023-01-10	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.9M	¥1,870	+42.5%	¥187M ($1.2M)
2023-01-10	SELL	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥1,870	+42.5%	¥2M ($12K)
2023-01-10	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.9M	¥1,870	+42.5%	¥187M ($1.2M)
2023-01-10	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	1.9M	¥1,870	+42.5%	¥187M ($1.2M)
2023-01-10	SELL	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥1,870	+42.5%	¥2M ($12K)
2022-10-31	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.0M	¥2,501	+57.0%	¥39M ($253K)
2022-10-31	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.0M	¥2,501	+57.0%	¥39M ($253K)
2022-10-31	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.0M	¥2,501	+57.0%	¥2M ($16K)
2022-10-31	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥2,501	-57.0%	¥1.9B ($12.5M)
2022-10-31	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.0M	¥2,501	+57.0%	¥39M ($253K)
2022-10-31	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥2,501	-57.0%	¥1.9B ($12.5M)
2022-10-31	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥2,501	-57.0%	¥1.9B ($12.5M)
2022-08-12	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.0M	¥2,723	+60.5%	¥27M ($172K)
2022-08-12	BUY	Market Buy	佐藤亨樹 Toshiki Sato	activist	2.0M	¥2,723	-60.5%	¥88M ($568K)
2022-08-12	SELL	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥2,723	+60.5%	¥3M ($17K)
2022-08-12	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	2.0M	¥2,723	-60.5%	¥85M ($551K)
2022-08-12	SELL	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥2,723	+60.5%	¥3M ($17K)
2021-11-12	SELL	unknown	中村慶郎 Yoshiro Nakamura	activist	2.0M	¥4,755	+77.4%	¥5M ($30K)
2021-11-12	BUY	unknown	慶キャピタル株式会社 Kei Capital Co., Ltd.	activist	775.2K	¥4,755	-77.4%	¥3.7B ($23.8M)
2021-11-12	SELL	unknown	佐藤亨樹 Toshiki Sato	activist	2.0M	¥4,755	+77.4%	¥5M ($30K)
2021-11-12	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥4,755	-77.4%	¥3.7B ($23.8M)
2021-11-12	BUY	unknown	TSK capital株式会社 TSK capital	activist	775.2K	¥4,755	-77.4%	¥3.7B ($23.8M)
2021-11-12	BUY	unknown	佐藤亨樹 Toshiki Sato	activist	2.0M	¥4,755	-77.4%	¥9.5B ($61.2M)

Showing the 50 most recent of 58 filings.

Frequently asked questions

Who has been buying Orchestra Holdings Inc. stock?: 4 distinct investors have filed 4 disclosed large-shareholding filings in Orchestra Holdings Inc. (6533), most recently on 2026-02-04. 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 Orchestra Holdings Inc. have?: Orchestra Holdings Inc. has 4 buy-side and 25 sell-side disclosures on record, covering ¥236M ($1.5M) in total reported value, spanning 2021-03-30 to 2026-02-04.
Where does StockDrifts get Orchestra 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 Orchestra Holdings Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.