Who has been buying Nikken Kogaku Co., Ltd. stock?

6 distinct investors have filed 10 disclosed large-shareholding filings in Nikken Kogaku Co., Ltd. (9767), most recently on 2026-02-17. 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 Nikken Kogaku Co., Ltd. have?

Nikken Kogaku Co., Ltd. has 10 buy-side and 2 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2021-03-26 to 2026-02-17.

Where does StockDrifts get Nikken Kogaku 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.

Nikken Kogaku Co., Ltd. 9767

Company

日建工学株式会社Nikken Kogaku Co., Ltd.

Investors

Buys

Total Value

¥2.8B ($18.2M)

Avg Return

+5.17%

Last Filing

2026-02-17

Nikken Kogaku Co., Ltd. (9767) has 10 disclosed large-shareholding filings and 2 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥2.8B ($18.2M) in reported transaction value. The earliest filing StockDrifts holds for Nikken Kogaku Co., Ltd. is dated 2021-03-26; the most recent is 2026-02-17. 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 +5.17%, 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
2026-06-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	135.3K	¥1,450	+3.7%	¥31M ($202K)
2026-02-17	BUY	Market Buy	技研ホールディングス株式会社	passive	312.3K	¥1,585	+6.5%	¥527M ($3.4M)
2026-02-17	SELL	Market Buy	フリージア・マクロス株式会社	passive	51.5K	¥1,585	-6.5%	¥87M ($561K)
2025-09-29	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	113.7K	¥1,580	+6.8%	¥588K ($4K)
2025-08-01	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	113.4K	¥1,401	+20.5%	¥26M ($168K)
2025-05-14	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	94.7K	¥1,415	+19.3%	¥134M ($865K)
2025-01-17	BUY	Market Buy	技研ホールディングス株式会社 Giken Holdings Co.,Ltd.	passive	132.3K	¥1,397	+20.8%	¥185M ($1.2M)
2025-01-17	BUY	Market Buy	フリージア・マクロス株式会社 FREESIA MACROSS CORPORATION	passive	231.5K	¥1,397	+20.8%	¥323M ($2.1M)
2024-08-28	BUY	Market Buy	菊池恵里香 KIKUCHI ERIKA	strategic	112.8K	¥1,407	+20.0%	¥1M ($8K)
2024-08-28	BUY	unknown	菊池恵理香 KIKUCHI ERIKA	strategic	112.8K	¥1,407	+20.0%	¥1M ($8K)
2024-04-19	BUY	unknown	株式会社ジェイ・エム・イー代表取締役行本卓生 JME	other	128.8K	¥1,574	+7.2%	¥203M ($1.3M)
2024-04-19	BUY	unknown	株式会社ジェイ・エム・イー JME	other	1.3M	¥1,574	+7.2%	¥2.0B ($13.1M)
2024-04-17	BUY	unknown	株式会社ジェイ・エム・イー j m e	other	88.8K	¥1,608	+5.0%	¥143M ($921K)
2024-04-17	BUY	unknown	株式会社ジェイ・エム・イー代表取締役行本卓生 JME	other	88.8K	¥1,608	+5.0%	¥143M ($921K)
2024-04-17	BUY	unknown	株式会社ジェイ・エム・イー JME	other	1.3M	¥1,608	+5.0%	¥2.1B ($13.4M)
2024-04-17	BUY	unknown	株式会社ジェイ・エム・イー JME	other	1.3M	¥1,608	+5.0%	¥2.1B ($13.4M)
2024-04-17	BUY	unknown	株式会社ジェイ・エム・イー JME	other	88.8K	¥1,608	+5.0%	¥143M ($921K)
2024-04-17	BUY	unknown	株式会社ジェイ・エム・イー JME	other	88.8K	¥1,608	+5.0%	¥64M ($415K)
2023-11-14	BUY	unknown	株式会社ナガワ NAGAWA Co.,Ltd.	other	93.8K	¥1,688	+0.0%	¥158M ($1.0M)
2022-10-11	BUY	Market Buy	技研ホールディングス株式会社 Giken Holdings Co.,Ltd.	passive	132.3K	¥1,530	+10.3%	¥4M ($24K)
2022-10-11	SELL	Market Buy	フリージア・マクロス株式会社 FREESIA MACROSS CORPORATION	passive	231.5K	¥1,530	-10.3%	¥9M ($59K)
2021-05-12	BUY	Market Buy	技研ホールディングス株式会社 Giken Holdings Co.,Ltd.	passive	129.8K	¥2,040	-17.3%	¥9M ($56K)
2021-05-12	BUY	Market Buy	フリージア・マクロス株式会社 FREESIA MACROSS CORPORATION	passive	237.4K	¥2,040	-17.3%	¥484M ($3.1M)
2021-03-26	BUY	Market Buy	技研ホールディングス株式会社 Giken Holdings Co.,Ltd.	passive	125.5K	¥2,095.271	-19.4%	¥44M ($284K)
2021-03-26	BUY	Market Buy	フリージア・マクロス株式会社 FREESIA MACROSS CORPORATION	passive	237.4K	¥2,095.271	-19.4%	¥497M ($3.2M)

Frequently asked questions

Who has been buying Nikken Kogaku Co., Ltd. stock?: 6 distinct investors have filed 10 disclosed large-shareholding filings in Nikken Kogaku Co., Ltd. (9767), most recently on 2026-02-17. 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 Nikken Kogaku Co., Ltd. have?: Nikken Kogaku Co., Ltd. has 10 buy-side and 2 sell-side disclosures on record, covering ¥2.8B ($18.2M) in total reported value, spanning 2021-03-26 to 2026-02-17.
Where does StockDrifts get Nikken Kogaku 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 Nikken Kogaku Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.