Who has been buying KNC Laboratories Co., Ltd. stock?

7 distinct investors have filed 5 disclosed large-shareholding filings in KNC Laboratories Co., Ltd. (6568), most recently on 2026-03-23. 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 KNC Laboratories Co., Ltd. have?

KNC Laboratories Co., Ltd. has 5 buy-side and 12 sell-side disclosures on record, covering ¥1.0B ($6.6M) in total reported value, spanning 2021-08-17 to 2026-03-23.

Where does StockDrifts get KNC Laboratories Co., Ltd. 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.

KNC Laboratories Co., Ltd. 6568

Company

神戸天然物化学株式会社KNC Laboratories Co., Ltd.

Investors

Buys

Total Value

¥1.0B ($6.6M)

Avg Return

+16.36%

Last Filing

2026-03-23

KNC Laboratories Co., Ltd. (6568) has 5 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥1.0B ($6.6M) in reported transaction value. The earliest filing StockDrifts holds for KNC Laboratories Co., Ltd. is dated 2021-08-17; the most recent is 2026-03-23. 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 +16.36%, 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
2026-03-23	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	246.2K	¥1,143	-10.8%	¥213M ($1.4M)
2025-10-23	BUY	unknown	KNC興産株式会社 KNC Kosan Co., Ltd.	strategic	1.5M	¥1,176	+7.7%	¥1.8B ($11.5M)
2025-10-23	SELL	unknown	広瀬克利 Hirose Katsutoshi	strategic	723.5K	¥1,176	-7.7%	¥823M ($5.3M)
2025-10-23	SELL	unknown	KNC興産株式会社 KNC Kosan Co.,Ltd.	activist	3.0M	¥1,176	-7.7%	¥200M ($1.3M)
2025-10-23	SELL	unknown	KNC興産株式会社 KNC Kosan Co., Ltd.	strategic	1.5M	¥1,176	-7.7%	¥8M ($53K)
2025-10-20	BUY	unknown	公益財団法人KNC広瀬財団 KNC HIROSE FOUNDATION	other	700.0K	¥1,175	+7.8%	¥823M ($5.3M)
2025-06-26	SELL	unknown	宮内仁志 Hitoshi Miyauchi	strategic	813.0K	¥1,081	-17.2%	¥18M ($114K)
2025-06-20	SELL	Market Buy	SBIアセットマネジメント株式会社 SBI Asset Management Co., Ltd.	passive	0	¥1,064	-19.1%	¥69M ($443K)
2025-06-20	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	432.7K	¥1,064	+19.1%	¥71M ($459K)
2025-04-07	SELL	Market Buy	SBIアセットマネジメント株式会社 SBI Asset Management Co., Ltd.	passive	64.4K	¥988	-28.2%	¥15M ($99K)
2025-04-07	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	365.8K	¥988	+28.2%	¥44M ($283K)
2024-12-06	BUY	unknown	SBIアセットマネジメント株式会社 SBI Asset Management Co., Ltd.	passive	80.0K	¥1,118	+13.3%	¥89M ($577K)
2024-12-06	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	321.5K	¥1,118	+13.3%	¥359M ($2.3M)
2022-05-16	SELL	unknown	広瀬克利 Hirose Katsutoshi	strategic	1.4M	¥1,081	-17.2%	¥114M ($738K)
2022-05-16	SELL	unknown	広瀬克利 Hirose Katsutoshi	strategic	1.4M	¥1,081	-17.2%	¥114M ($738K)
2022-04-21	SELL	unknown	宮内仁志 Hitoshi Miyauchi	activist	829.0K	¥1,126	-12.5%	¥81M ($520K)
2021-11-02	SELL	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	386.2K	¥1,153	-9.9%	¥95M ($613K)
2021-08-17	SELL	Market Buy	スパークス・アセット・マネジメント株式会社 SPARX Asset Management Co., Ltd.	passive	468.1K	¥1,153	-9.9%	¥99M ($637K)

Frequently asked questions

Who has been buying KNC Laboratories Co., Ltd. stock?: 7 distinct investors have filed 5 disclosed large-shareholding filings in KNC Laboratories Co., Ltd. (6568), most recently on 2026-03-23. 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 KNC Laboratories Co., Ltd. have?: KNC Laboratories Co., Ltd. has 5 buy-side and 12 sell-side disclosures on record, covering ¥1.0B ($6.6M) in total reported value, spanning 2021-08-17 to 2026-03-23.
Where does StockDrifts get KNC Laboratories Co., Ltd. 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 KNC Laboratories Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.