Who has been buying Altech Corporation stock?

1 distinct investors have filed 7 disclosed large-shareholding filings in Altech Corporation (4641), most recently on 2025-07-23. 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 Altech Corporation have?

Altech Corporation has 7 buy-side and 1 sell-side disclosures on record, covering ¥123M ($794K) in total reported value, spanning 2022-10-21 to 2025-07-23.

Where does StockDrifts get Altech Corporation 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.

Altech Corporation 4641

Company

株式会社アルプス技研Altech Corporation

Investors

Buys

Total Value

¥123M ($794K)

Avg Return

+0.82%

Last Filing

2025-07-23

Altech Corporation (4641) has 7 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 1 distinct investors. Together those filings cover ¥123M ($794K) in reported transaction value. The earliest filing StockDrifts holds for Altech Corporation is dated 2022-10-21; the most recent is 2025-07-23. 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 +0.82%, 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
2026-07-23	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	2.7M	¥824	+1.6%	¥2.3B ($14.5M)
2026-07-23	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	424.1K	¥824	+1.6%	¥349M ($2.3M)
2026-07-23	BUY	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	3.1M	¥824	+1.6%	¥2.5B ($16.3M)
2026-07-07	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	3.1M	¥801	+0.8%	¥15M ($96K)
2026-07-07	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	424.1K	¥801	-0.8%	¥15M ($96K)
2026-07-07	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	2.7M	¥801	-0.8%	¥150M ($965K)
2026-06-18	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	789.6K	¥774.667	+4.3%	¥170M ($1.1M)
2026-06-18	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	135.2K	¥774.667	+4.3%	¥26M ($166K)
2026-06-18	SELL	unknown	エフアイエーエムエルエルシー FIAM LLC	other	836.5K	¥774.667	-4.3%	¥8M ($52K)
2026-06-18	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	836.5K	¥774.667	+4.3%	¥648M ($4.2M)
2026-06-18	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	51.6K	¥774.667	+4.3%	¥2M ($11K)
2026-06-18	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	762.9K	¥774.667	+4.3%	¥591M ($3.8M)
2026-06-18	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	597.3K	¥774.667	-4.3%	¥3M ($22K)
2026-06-18	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	100.9K	¥774.667	+4.3%	¥40M ($259K)
2026-06-18	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	846.8K	¥774.667	+4.3%	¥92M ($591K)
2026-06-18	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	979.6K	¥774.667	+4.3%	¥146M ($944K)
2026-06-18	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	135.2K	¥774.667	+4.3%	¥105M ($676K)
2026-06-18	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	993.1K	¥774.667	+4.3%	¥11M ($73K)
2026-06-18	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	135.2K	¥774.667	+4.3%	¥105M ($676K)
2026-06-18	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	849.3K	¥774.667	+4.3%	¥10M ($62K)
2026-06-18	BUY	Market Buy	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	1.0M	¥774.667	+4.3%	¥26M ($166K)
2026-06-11	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	50.9K	¥776	+4.5%	¥2M ($11K)
2026-06-11	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	762.9K	¥776	+4.5%	¥128M ($827K)
2026-06-11	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	602.2K	¥776	-4.5%	¥64M ($414K)
2026-06-10	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	597.8K	¥774.333	+4.7%	¥165M ($1.1M)
2026-06-10	BUY	Market Buy	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	48.8K	¥774.333	+4.7%	¥15M ($98K)
2026-06-10	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	684.3K	¥774.333	-4.7%	¥7M ($43K)
2026-06-08	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	386.0K	¥772.667	+0.9%	¥298M ($1.9M)
2026-06-08	BUY	unknown	フィデリティマネジメントトラストカンパニー Fidelity Management Trust Company	other	28.5K	¥772.667	+0.9%	¥22M ($142K)
2026-06-08	BUY	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	692.9K	¥772.667	+0.9%	¥535M ($3.5M)
2025-07-23	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.0M	¥2,695	-4.2%	¥123M ($794K)
2025-07-07	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.0M	¥2,740	-5.8%	¥34M ($220K)
2025-06-20	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.0M	¥2,755	-6.3%	¥594M ($3.8M)
2025-03-07	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.7M	¥2,594	-0.5%	¥1.0B ($6.5M)
2024-07-22	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.4M	¥2,684	+3.8%	¥12M ($75K)
2024-07-05	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.4M	¥2,585	-0.1%	¥219M ($1.4M)
2024-03-25	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.3M	¥2,736	-5.7%	¥613M ($4.0M)
2022-10-21	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.1M	¥2,010	+28.4%	¥2.2B ($14.4M)

Frequently asked questions

Who has been buying Altech Corporation stock?: 1 distinct investors have filed 7 disclosed large-shareholding filings in Altech Corporation (4641), most recently on 2025-07-23. 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 Altech Corporation have?: Altech Corporation has 7 buy-side and 1 sell-side disclosures on record, covering ¥123M ($794K) in total reported value, spanning 2022-10-21 to 2025-07-23.
Where does StockDrifts get Altech Corporation 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 Altech Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.