Who has been buying PHC Holdings Corporation stock?

5 distinct investors have filed 5 disclosed large-shareholding filings in PHC Holdings Corporation (6523), most recently on 2026-03-04. 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 PHC Holdings Corporation have?

PHC Holdings Corporation has 5 buy-side and 10 sell-side disclosures on record, covering ¥259.9B ($1.7B) in total reported value, spanning 2021-10-14 to 2026-03-04.

Where does StockDrifts get PHC Holdings 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.

PHC Holdings Corporation 6523

Company

PHCホールデングス株式会社PHC Holdings Corporation

Investors

Buys

Total Value

¥259.9B ($1.7B)

Avg Return

-45.36%

Last Filing

2026-03-04

PHC Holdings Corporation (6523) has 5 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥259.9B ($1.7B) in reported transaction value. The earliest filing StockDrifts holds for PHC Holdings Corporation is dated 2021-10-14; the most recent is 2026-03-04. 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 -45.36%, 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	SELL	Market Buy	三井物産株式会社 MITSUI & CO., LTD.	passive	15.3M	¥1,077	-31.4%	¥3.5B ($22.9M)
2026-05-20	SELL	Market Buy	パナソニックホールディングス株式会社 Panasonic Holdings Corporation	passive	5.8M	¥1,026	-4.3%	¥2.1B ($13.3M)
2026-03-04	SELL	Market Buy	三井物産株式会社 Mitsui & Co ., Ltd	passive	18.6M	¥1,010	-4.1%	¥3.8B ($24.5M)
2025-11-19	SELL	Market Buy	パナソニックホールディングス株式会社 Panasonic Holdings Corporation	passive	7.8M	¥957	-9.8%	¥2.0B ($12.6M)
2025-07-02	BUY	Market Buy	三菱ケミカル株式会社 Mitsubishi Chemical Corporation	passive	12.3M	¥907	+15.9%	¥11.2B ($72.0M)
2025-07-02	SELL	Market Buy	株式会社生命科学インスティテュート Life Science Institute, Inc.	passive	0	¥907	-15.9%	¥11.5B ($74.0M)
2024-09-12	BUY	Market Buy	ケーケーアール・ピーエイチシー・インベストメント・エルピー(KKR PHC Investment L.P.) KKR PHC Investment L.P.	passive	48.0M	¥1,098	-4.3%	¥52.7B ($340.0M)
2024-09-12	SELL	Market Buy	ケーケーアール・ピーエイチシー・インベストメント・エルピー(KKR PHC Investment L.P.) KKR PHC Investment L.P.	passive	48.0M	¥1,098	+4.3%	¥915M ($5.9M)
2024-02-26	SELL	Market Buy	パナソニックホールディングス株式会社 Panasonic Holdings Corporation	passive	9.8M	¥1,252	+16.1%	¥2.1B ($13.6M)
2022-05-23	SELL	Market Buy	三井物産株式会社 Mitsui & Co., LTD.	passive	21.9M	¥1,600	+34.3%	¥318M ($2.1M)
2022-05-19	SELL	Market Buy	ケーケーアール・ピーエイチシー・インベストメント・エルピー(KKR PHC Investment L.P.) KKR PHC Investment L.P.	passive	48.0M	¥1,580	+33.5%	¥275M ($1.8M)
2022-05-19	BUY	Market Buy	ケーケーアール・ピーエイチシー・インベストメント・エルピー(KKR PHC Investment L.P.) KKR PHC Investment L.P.	passive	48.0M	¥1,580	-33.5%	¥75.8B ($489.2M)
2022-04-18	SELL	Market Buy	ケーケーアール・ピーエイチシー・インベストメント・エルピー(KKR PHC Investment L.P.) KKR PHC Investment L.P.	passive	48.0M	¥1,771	+40.6%	¥372M ($2.4M)
2022-04-04	SELL	Market Buy	パナソニックホールディングス株式会社 Panasonic Holdings Corporation	passive	11.3M	¥1,848	+43.1%	¥207M ($1.3M)
2021-11-22	SELL	Market Buy	ケーケーアール・ピーエイチシー・インベストメント・エルピー(KKR PHC Investment L.P.) KKR PHC Investment L.P.	passive	48.0M	¥2,510	+58.1%	¥185M ($1.2M)
2021-10-20	BUY	acquisition	三井物産株式会社 Mitsui & Co., LTD.	activist	21.9M	¥2,659	-60.5%	¥58.2B ($375.2M)
2021-10-15	BUY	Market Buy	パナソニック株式会社 Panasonic Corporation	passive	11.3M	¥2,690	-60.9%	¥30.3B ($195.5M)
2021-10-15	BUY	Market Buy	株式会社生命科学インスティテュート Life Science Institute, Inc.	passive	12.3M	¥2,690	-60.9%	¥33.1B ($213.4M)
2021-10-15	BUY	Market Buy	パナソニック株式会社 Panasonic Corporation	passive	11.3M	¥2,690	-60.9%	¥30.3B ($195.5M)
2021-10-14	BUY	acquisition	ケーケーアール・ピーエイチシー・インベストメント・エルピー(KKR PHC Investment L.P.) KKR PHC Investment L.P.	passive	48.0M	¥2,651	-60.4%	¥127.2B ($820.9M)

Frequently asked questions

Who has been buying PHC Holdings Corporation stock?: 5 distinct investors have filed 5 disclosed large-shareholding filings in PHC Holdings Corporation (6523), most recently on 2026-03-04. 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 PHC Holdings Corporation have?: PHC Holdings Corporation has 5 buy-side and 10 sell-side disclosures on record, covering ¥259.9B ($1.7B) in total reported value, spanning 2021-10-14 to 2026-03-04.
Where does StockDrifts get PHC Holdings 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 PHC Holdings Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.