Who has been buying Soken Chemical & Engineering Co., Ltd. stock?

9 distinct investors have filed 13 disclosed large-shareholding filings in Soken Chemical & Engineering Co., Ltd. (4972), most recently on 2026-03-30. 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 Soken Chemical & Engineering Co., Ltd. have?

Soken Chemical & Engineering Co., Ltd. has 13 buy-side and 5 sell-side disclosures on record, covering ¥1.7B ($10.9M) in total reported value, spanning 2021-09-24 to 2026-03-30.

Where does StockDrifts get Soken Chemical & Engineering 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.

Soken Chemical & Engineering Co., Ltd. 4972

Company

綜研化学株式会社Soken Chemical & Engineering Co., Ltd.

Investors

Buys

Total Value

¥1.7B ($10.9M)

Avg Return

+86.41%

Last Filing

2026-03-30

Soken Chemical & Engineering Co., Ltd. (4972) has 13 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥1.7B ($10.9M) in reported transaction value. The earliest filing StockDrifts holds for Soken Chemical & Engineering Co., Ltd. is dated 2021-09-24; the most recent is 2026-03-30. 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 +86.41%, 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
2026-07-30	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	3.9M	¥3,010	+11.1%	¥505M ($3.3M)
2026-07-21	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	3.8M	¥3,600	-7.1%	¥675M ($4.4M)
2026-07-13	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	3.6M	¥3,530	-6.8%	¥727M ($4.7M)
2026-07-07	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	3.4M	¥3,585	-7.3%	¥774M ($5.0M)
2026-06-24	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	3.1M	¥3,270	+1.8%	¥575M ($3.7M)
2026-06-18	BUY	Market Buy	ハイディステクノロジーズカンパニーリミテッド Hydis Technologies Co., Ltd.	passive	112.6K	¥3,445	-3.3%	¥388M ($2.5M)
2026-06-18	BUY	Market Buy	ニューフィールドイーペーパーカンパニーリミテッド NEW FIELD E-PAPER CO., LTD.	passive	350.0K	¥3,445	-3.3%	¥1.2B ($7.8M)
2026-06-18	SELL	Market Buy	イーインクホールディングスインク E INK HOLDINGS INC.	passive	167.6K	¥3,445	+3.3%	¥686M ($4.4M)
2026-06-11	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	3.0M	¥3,490	+0.3%	¥950M ($6.1M)
2026-05-22	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	activist	2.7M	¥3,405	-1.0%	¥740M ($4.8M)
2026-03-30	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	2.5M	¥3,250	+3.1%	¥1.2B ($7.9M)
2026-03-11	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	2.1M	¥3,445	-4.9%	¥818M ($5.3M)
2026-02-09	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	1.9M	¥2,966	+10.4%	¥502M ($3.2M)
2026-02-03	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー（Axium Capital Pte. Ltd.） Axium Capital Pte. Ltd.	passive	1.7M	¥2,883	+13.6%	¥842M ($5.4M)
2025-12-05	BUY	Market Buy	三井住友カード株式会社	other	110.0K	¥2,578	-27.0%	¥360M ($2.3M)
2025-12-05	BUY	Market Buy	株式会社三井住友銀行	other	270.0K	¥2,578	-27.0%	¥884M ($5.7M)
2025-12-05	SELL	Market Buy	三井住友DSアセットマネジメント株式会社	passive	415.3K	¥2,578	-27.0%	¥1.4B ($8.8M)
2025-11-21	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	1.4M	¥2,502	+30.9%	¥710M ($4.6M)
2025-11-10	BUY	Market Buy	アクシウム・キャピタル・ピーティーイー・エルティーディー(Axium Capital Pte. Ltd.) Axium Capital Pte. Ltd.	passive	1.1M	¥2,449	+33.7%	¥2.7B ($17.6M)
2025-03-21	BUY	Market Buy	ハイディステクノロジーズカンパニーリミテッド(Hydis Technologies Co. Hydis Technologies Co., Ltd.	passive	56.3K	¥1,662.5	+97.0%	¥94M ($604K)
2025-03-21	BUY	Market Buy	ニューフィールドイーペーパーカンパニーリミテッド(NEW FIELD E-PAPER CO. NEW FIELD E-PAPER CO., LTD.	passive	175.0K	¥1,662.5	+97.0%	¥291M ($1.9M)
2025-03-21	BUY	Market Buy	イーインクホールディングスインク E INK HOLDINGS INC.	passive	183.8K	¥1,662.5	+97.0%	¥306M ($2.0M)
2024-08-07	BUY	Market Buy	三井住友カード株式会社 Sumitomo Mitsui Card Co., Ltd.	other	55.0K	¥1,308.5	+150.3%	¥72M ($464K)
2024-08-07	SELL	Market Buy	SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd.	other	0	¥1,308.5	-150.3%	¥72M ($462K)
2024-08-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	135.0K	¥1,308.5	+150.3%	¥177M ($1.1M)
2024-08-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	312.9K	¥1,308.5	+150.3%	¥113M ($729K)
2023-07-24	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	391.8K	¥963.5	-239.9%	¥105M ($676K)
2023-06-22	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	500.2K	¥909	-260.3%	¥210M ($1.4M)
2023-06-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	731.7K	¥899	-264.3%	¥88M ($568K)
2021-09-24	BUY	Market Buy	SMBCファイナンスサービス株式会社 SMBC Finance Service Co., Ltd.	other	55.0K	¥1,097.5	+198.4%	¥60M ($389K)
2021-09-24	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	135.0K	¥1,097.5	+198.4%	¥148M ($956K)
2021-09-24	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	226.7K	¥1,097.5	+198.4%	¥249M ($1.6M)

Frequently asked questions

Who has been buying Soken Chemical & Engineering Co., Ltd. stock?: 9 distinct investors have filed 13 disclosed large-shareholding filings in Soken Chemical & Engineering Co., Ltd. (4972), most recently on 2026-03-30. 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 Soken Chemical & Engineering Co., Ltd. have?: Soken Chemical & Engineering Co., Ltd. has 13 buy-side and 5 sell-side disclosures on record, covering ¥1.7B ($10.9M) in total reported value, spanning 2021-09-24 to 2026-03-30.
Where does StockDrifts get Soken Chemical & Engineering 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 Soken Chemical & Engineering Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.