Who has been buying MANAC Chemical Partners Co.,Ltd stock?

5 distinct investors have filed 11 disclosed large-shareholding filings in MANAC Chemical Partners Co.,Ltd (4360), most recently on 2026-03-24. 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 MANAC Chemical Partners Co.,Ltd have?

MANAC Chemical Partners Co.,Ltd has 11 buy-side and 2 sell-side disclosures on record, covering ¥4.3B ($28.0M) in total reported value, spanning 2025-08-27 to 2026-03-24.

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.

MANAC Chemical Partners Co.,Ltd 4360

Company

株式会社マナック・ケミカル・パートナーズMANAC Chemical Partners Co.,Ltd

Investors

Buys

Total Value

¥4.3B ($28.0M)

Avg Return

+6.90%

Last Filing

2026-03-24

MANAC Chemical Partners Co.,Ltd (4360) has 11 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥4.3B ($28.0M) in reported transaction value. The earliest filing StockDrifts holds for MANAC Chemical Partners Co.,Ltd is dated 2025-08-27; the most recent is 2026-03-24. Across these filings the average return since disclosure is +6.90%, 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
2026-03-24	BUY	negotiated	東ソー株式会社	strategic	1.6M	¥950	+3.8%	¥1.5B ($9.9M)
2026-03-24	BUY	negotiated	東ソー・ファインケム株式会社	other	25.3K	¥950	+3.8%	¥24M ($155K)
2026-03-24	BUY	negotiated	オルガノ株式会社	other	11.5K	¥950	+3.8%	¥11M ($70K)
2026-02-27	BUY	negotiated	東ソー株式会社	strategic	1.6M	¥1,111	-11.3%	¥1.8B ($11.5M)
2026-02-27	BUY	negotiated	東ソー・ファインケム株式会社	other	25.3K	¥1,111	-11.3%	¥28M ($181K)
2026-02-27	BUY	negotiated	オルガノ株式会社	other	11.5K	¥1,111	-11.3%	¥13M ($82K)
2026-02-27	BUY	negotiated	東ソー株式会社	strategic	1.6M	¥1,111	-	-
2026-02-27	BUY	negotiated	東ソー・ファインケム株式会社	other	25.3K	¥1,111	-	-
2026-02-27	SELL	negotiated	オルガノ株式会社	unknown	0	¥1,111	+11.3%	¥12M ($80K)
2026-02-27	BUY	negotiated	東ソー株式会社	strategic	1.6M	¥1,111	-	-
2026-02-27	BUY	negotiated	東ソー・ファインケム株式会社	other	25.3K	¥1,111	-	-
2026-02-27	SELL	negotiated	オルガノ株式会社	unknown	0	¥1,111	+11.3%	¥12M ($80K)
2026-02-27	BUY	negotiated	東ソー株式会社	strategic	1.6M	¥1,111	-11.3%	¥1.8B ($11.5M)
2026-02-27	BUY	negotiated	東ソー・ファインケム株式会社	other	25.3K	¥1,111	-11.3%	¥28M ($181K)
2026-02-27	BUY	negotiated	オルガノ株式会社	other	11.5K	¥1,111	-11.3%	¥13M ($82K)
2025-11-28	BUY	Market Buy	一般財団法人松永財団 Matsunaga Foundation	other	1.3M	¥638	+54.5%	¥855M ($5.5M)
2025-11-28	BUY	Market Buy	一般財団法人松永財団 Matsunaga Foundation	other	1.3M	¥638	-	¥855M ($5.5M)
2025-08-27	BUY	unknown	杉之原祥二 Shoji Suginohara	activist	469.4K	¥591	+66.8%	¥277M ($1.8M)

Frequently asked questions

Who has been buying MANAC Chemical Partners Co.,Ltd stock?: 5 distinct investors have filed 11 disclosed large-shareholding filings in MANAC Chemical Partners Co.,Ltd (4360), most recently on 2026-03-24. 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 MANAC Chemical Partners Co.,Ltd have?: MANAC Chemical Partners Co.,Ltd has 11 buy-side and 2 sell-side disclosures on record, covering ¥4.3B ($28.0M) in total reported value, spanning 2025-08-27 to 2026-03-24.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.