Who has been buying WingArc1st Inc. stock?

9 distinct investors have filed 16 disclosed large-shareholding filings in WingArc1st Inc. (4432), most recently on 2026-04-08. 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 WingArc1st Inc. have?

WingArc1st Inc. has 16 buy-side and 9 sell-side disclosures on record, covering ¥51.8B ($334.0M) in total reported value, spanning 2021-03-18 to 2026-04-08.

Where does StockDrifts get WingArc1st Inc. 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.

WingArc1st Inc. 4432

Company

ウイングアーク1st株式会社WingArc1st Inc.

Investors

Buys

Total Value

¥51.8B ($334.0M)

Avg Return

+6.20%

Last Filing

2026-04-08

WingArc1st Inc. (4432) has 16 disclosed large-shareholding filings and 9 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥51.8B ($334.0M) in reported transaction value. The earliest filing StockDrifts holds for WingArc1st Inc. is dated 2021-03-18; the most recent is 2026-04-08. 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 +6.20%, 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
2026-08-07	SELL	unknown	エフアイエーエムエルエルシー FIAM LLC	other	265.6K	¥3,130	-4.2%	¥99M ($637K)
2026-08-07	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	137.5K	¥3,130	+4.2%	¥431M ($2.8M)
2026-08-07	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	899.9K	¥3,130	-4.2%	¥2.5B ($15.8M)
2026-07-23	SELL	unknown	エフアイエーエムエルエルシー FIAM LLC	other	298.6K	¥2,832	-15.1%	¥50M ($320K)
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	137.5K	¥2,832	+15.1%	¥390M ($2.5M)
2026-07-23	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	1.7M	¥2,832	-15.1%	¥1.2B ($7.6M)
2026-06-17	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	324.1K	¥2,305	+25.5%	¥89M ($571K)
2026-06-17	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	353.6K	¥2,305	+25.5%	¥64M ($416K)
2026-06-17	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	78.1K	¥2,305	+25.5%	¥180M ($1.2M)
2026-06-17	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	2.2M	¥2,305	+25.5%	¥837M ($5.4M)
2026-06-17	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	377.0K	¥2,305	+25.5%	¥56M ($364K)
2026-06-17	SELL	unknown	エフアイエーエムエルエルシー FIAM LLC	other	373.3K	¥2,305	-25.5%	¥8M ($52K)
2026-06-17	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	2.8M	¥2,305	+25.5%	¥387M ($2.5M)
2026-06-17	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	150.0K	¥2,305	+25.5%	¥346M ($2.2M)
2026-06-17	BUY	Market Buy	フィデリティインスティテューショナルアセットマネジメントトラストカンパニー Fidelity Institutional Asset Management Trust Company	other	48.5K	¥2,305	+25.5%	¥24M ($156K)
2026-06-17	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	112.1K	¥2,305	+25.5%	¥258M ($1.7M)
2026-06-17	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	272.5K	¥2,305	+25.5%	¥16M ($104K)
2026-06-17	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	1.3M	¥2,305	+25.5%	¥314M ($2.0M)
2026-06-17	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	78.1K	¥2,305	+25.5%	¥180M ($1.2M)
2026-06-17	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	150.0K	¥2,305	+25.5%	¥346M ($2.2M)
2026-06-17	BUY	Market Buy	フィデリティインスティテューショナルアセットマネジメントトラストカンパニー Fidelity Institutional Asset Management Trust Company	other	53.6K	¥2,305	+25.5%	¥8M ($52K)
2026-06-17	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	131.6K	¥2,305	+25.5%	¥48M ($312K)
2026-06-17	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	284.7K	¥2,305	+25.5%	¥32M ($208K)
2026-06-17	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	1.4M	¥2,305	+25.5%	¥435M ($2.8M)
2026-06-17	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	78.1K	¥2,305	+25.5%	¥180M ($1.2M)
2026-06-17	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	150.0K	¥2,305	+25.5%	¥346M ($2.2M)
2026-06-17	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	131.6K	¥2,305	+25.5%	¥303M ($2.0M)
2026-06-17	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	1.8M	¥2,305	+25.5%	¥902M ($5.8M)
2026-06-17	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	78.1K	¥2,305	+25.5%	¥180M ($1.2M)
2026-06-17	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	150.0K	¥2,305	+25.5%	¥346M ($2.2M)
2026-06-17	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	131.6K	¥2,305	+25.5%	¥303M ($2.0M)
2026-06-17	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	78.1K	¥2,305	+25.5%	¥180M ($1.2M)
2026-06-17	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	150.0K	¥2,305	+25.5%	¥346M ($2.2M)
2026-06-17	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	131.6K	¥2,305	+25.5%	¥303M ($2.0M)
2026-06-17	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	2.6M	¥2,305	+25.5%	¥894M ($5.8M)
2026-06-17	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	78.1K	¥2,305	+25.5%	¥180M ($1.2M)
2026-06-17	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	150.0K	¥2,305	+25.5%	¥346M ($2.2M)
2026-06-17	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	131.6K	¥2,305	+25.5%	¥303M ($2.0M)
2026-06-17	BUY	unknown	フィデリティ・マネジメント・アンド・リサーチ・ジャパン株式会社	other	78.1K	¥2,305	+25.5%	¥180M ($1.2M)
2026-06-17	BUY	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	150.0K	¥2,305	+25.5%	¥346M ($2.2M)
2026-06-17	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	131.6K	¥2,305	+25.5%	¥303M ($2.0M)
2026-06-17	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	373.3K	¥2,305	+25.5%	¥861M ($5.6M)
2026-06-17	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	2.8M	¥2,305	+25.5%	¥6.4B ($41.1M)
2026-06-17	SELL	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	105.5K	¥2,305	-25.5%	¥105M ($677K)
2026-06-17	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	134.8K	¥2,305	+25.5%	¥8M ($52K)
2026-06-17	SELL	unknown	エフアイエーエムエルエルシー FIAM LLC	other	323.2K	¥2,305	-25.5%	¥121M ($781K)
2026-06-17	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	2.5M	¥2,305	-25.5%	¥718M ($4.6M)
2026-06-17	SELL	unknown	エフエムアールインベストメントマネジメントユーケーリミテッドLimited) FMR Investment Management (UK	other	45.5K	¥2,305	-25.5%	¥137M ($885K)
2026-06-17	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	134.8K	¥2,305	+25.5%	¥311M ($2.0M)
2026-06-17	SELL	unknown	エフアイエーエムエルエルシー FIAM LLC	other	316.0K	¥2,305	-25.5%	¥16M ($104K)

Showing the 50 most recent of 87 filings.

Frequently asked questions

Who has been buying WingArc1st Inc. stock?: 9 distinct investors have filed 16 disclosed large-shareholding filings in WingArc1st Inc. (4432), most recently on 2026-04-08. 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 WingArc1st Inc. have?: WingArc1st Inc. has 16 buy-side and 9 sell-side disclosures on record, covering ¥51.8B ($334.0M) in total reported value, spanning 2021-03-18 to 2026-04-08.
Where does StockDrifts get WingArc1st Inc. 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 WingArc1st Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.