Who has been buying Sugai Chemical Industry Co., Ltd. stock?

5 distinct investors have filed 22 disclosed large-shareholding filings in Sugai Chemical Industry Co., Ltd. (4120), most recently on 2026-04-06. 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 Sugai Chemical Industry Co., Ltd. have?

Sugai Chemical Industry Co., Ltd. has 22 buy-side and 8 sell-side disclosures on record, covering ¥616M ($4.0M) in total reported value, spanning 2022-02-14 to 2026-04-06.

Where does StockDrifts get Sugai Chemical Industry 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.

Sugai Chemical Industry Co., Ltd. 4120

Company

スガイ化学工業株式会社Sugai Chemical Industry Co., Ltd.

Investors

Buys

Total Value

¥616M ($4.0M)

Avg Return

+8.06%

Last Filing

2026-04-06

Sugai Chemical Industry Co., Ltd. (4120) has 22 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥616M ($4.0M) in reported transaction value. The earliest filing StockDrifts holds for Sugai Chemical Industry Co., Ltd. is dated 2022-02-14; the most recent is 2026-04-06. 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 +8.06%, 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
2026-04-06	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	47.5K	¥2,200	-0.5%	¥111M ($719K)
2026-01-05	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	36.6K	¥2,240	+1.9%	¥76M ($490K)
2026-01-05	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	36.6K	¥2,240	+1.9%	¥76M ($488K)
2025-11-17	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	59.6K	¥2,201	+3.7%	¥131M ($846K)
2025-11-17	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	59.6K	¥2,201	+3.7%	¥131M ($846K)
2025-10-07	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	98.1K	¥2,273	+0.4%	¥223M ($1.4M)
2025-08-20	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	70.5K	¥2,123	+7.5%	¥150M ($966K)
2025-08-18	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	70.5K	¥2,123	+7.5%	¥150M ($966K)
2025-08-18	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	70.5K	¥2,123	+7.5%	¥150M ($966K)
2025-04-04	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	40.6K	¥2,216	+3.0%	¥133M ($860K)
2025-04-04	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	40.6K	¥2,216	+3.0%	¥133M ($860K)
2025-04-04	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	40.6K	¥2,216	+3.0%	¥133M ($860K)
2024-10-04	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	100.7K	¥2,050	+11.4%	¥206M ($1.3M)
2024-07-29	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	unknown	0	¥2,633	+13.3%	¥17M ($110K)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	64.1K	¥2,633	-13.3%	¥167M ($1.1M)
2024-04-04	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	9.5K	¥3,010	-24.1%	¥26M ($169K)
2023-12-06	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	75.3K	¥2,500	-8.7%	¥188M ($1.2M)
2023-12-01	SELL	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	39.7K	¥2,500	+8.7%	¥105M ($675K)
2023-12-01	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	39.7K	¥2,500	-8.7%	¥105M ($675K)
2023-11-17	BUY	unknown	GMOクリック証券株式会社 GMO CLICK Securities, Inc.	other	81.5K	¥2,491	-8.3%	¥203M ($1.3M)
2023-10-05	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	66.9K	¥2,515	+9.2%	¥122M ($789K)
2023-09-22	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	115.5K	¥2,455	+7.0%	¥49M ($317K)
2023-09-19	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	135.5K	¥2,456	+7.0%	¥49M ($318K)
2023-09-15	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	155.5K	¥2,491	+8.3%	¥50M ($320K)
2023-09-13	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	175.5K	¥2,455	+7.0%	¥35M ($226K)
2023-04-18	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	189.7K	¥2,216	+3.0%	¥69M ($444K)
2023-04-06	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	158.7K	¥2,284	-0.0%	¥363M ($2.3M)
2023-03-31	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	1.9K	¥2,269	+0.6%	¥648K ($4K)
2022-12-06	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	163.6K	¥1,894	+20.5%	¥31M ($201K)
2022-11-22	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	147.2K	¥1,883	+21.2%	¥29M ($188K)
2022-11-07	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	131.7K	¥1,880	+21.4%	¥39M ($250K)
2022-08-19	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	111.0K	¥1,860	+22.7%	¥31M ($198K)
2022-06-06	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	94.6K	¥1,769	+29.1%	¥167M ($1.1M)
2022-05-20	BUY	Market Buy	各務正人 KAKAMU MASATO	passive	0	¥1,760	+29.7%	¥123M ($795K)
2022-05-20	BUY	Market Buy	各務正人 KAKAMU MASATO	passive	0	¥1,760	+29.7%	¥123M ($795K)
2022-02-14	BUY	Market Buy	各務正人 KAKAMU MASATO	passive	70.0K	¥1,576	+44.9%	¥110M ($712K)

Frequently asked questions

Who has been buying Sugai Chemical Industry Co., Ltd. stock?: 5 distinct investors have filed 22 disclosed large-shareholding filings in Sugai Chemical Industry Co., Ltd. (4120), most recently on 2026-04-06. 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 Sugai Chemical Industry Co., Ltd. have?: Sugai Chemical Industry Co., Ltd. has 22 buy-side and 8 sell-side disclosures on record, covering ¥616M ($4.0M) in total reported value, spanning 2022-02-14 to 2026-04-06.
Where does StockDrifts get Sugai Chemical Industry 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 Sugai Chemical Industry Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.