Who has been buying TDC SOFT Inc. stock?

4 distinct investors have filed 2 disclosed large-shareholding filings in TDC SOFT Inc. (4687), most recently on 2026-03-23. 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 TDC SOFT Inc. have?

TDC SOFT Inc. has 2 buy-side and 5 sell-side disclosures on record, covering ¥299M ($1.9M) in total reported value, spanning 2021-12-07 to 2026-03-23.

Where does StockDrifts get TDC SOFT 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.

TDC SOFT Inc. 4687

Company

TDCソフト株式会社TDC SOFT Inc.

Investors

Buys

Total Value

¥299M ($1.9M)

Avg Return

+21.27%

Last Filing

2026-03-23

TDC SOFT Inc. (4687) has 2 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥299M ($1.9M) in reported transaction value. The earliest filing StockDrifts holds for TDC SOFT Inc. is dated 2021-12-07; the most recent is 2026-03-23. 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 +21.27%, 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
2026-06-23	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	597.4K	¥857	+16.2%	¥303M ($2.0M)
2026-06-23	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	75.2K	¥857	+16.2%	¥64M ($416K)
2026-06-23	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	956.4K	¥857	+16.2%	¥13M ($83K)
2026-06-23	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	153.1K	¥857	+16.2%	¥131M ($846K)
2026-06-23	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	1.7M	¥857	+16.2%	¥439M ($2.8M)
2026-06-23	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	1.8M	¥857	-16.2%	¥65M ($417K)
2026-06-09	BUY	unknown	エフアイエーエムエルエルシー FIAM LLC	other	243.6K	¥954	+2.3%	¥232M ($1.5M)
2026-06-09	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	75.2K	¥954	+2.3%	¥72M ($463K)
2026-06-09	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	942.3K	¥954	+2.3%	¥899M ($5.8M)
2026-03-23	SELL	unknown	アセットマネジメントOne株式会社	other	640.6K	¥935	-3.2%	¥618M ($4.0M)
2026-03-23	SELL	unknown	みずほ信託銀行株式会社	other	527.9K	¥935	-3.2%	¥509M ($3.3M)
2026-03-23	SELL	unknown	株式会社みずほ銀行	strategic	856.0K	¥935	-3.2%	¥826M ($5.3M)
2023-08-22	BUY	Market Buy	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.6M	¥809.5	+19.2%	¥299M ($1.9M)
2023-06-07	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.3M	¥782.5	+23.3%	¥987M ($6.4M)
2021-12-07	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	365.6K	¥572.5	-68.6%	¥35M ($223K)
2021-12-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	376.2K	¥572.5	-68.6%	¥13M ($83K)
2021-12-07	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	528.0K	¥572.5	+68.6%	¥302M ($2.0M)

Frequently asked questions

Who has been buying TDC SOFT Inc. stock?: 4 distinct investors have filed 2 disclosed large-shareholding filings in TDC SOFT Inc. (4687), most recently on 2026-03-23. 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 TDC SOFT Inc. have?: TDC SOFT Inc. has 2 buy-side and 5 sell-side disclosures on record, covering ¥299M ($1.9M) in total reported value, spanning 2021-12-07 to 2026-03-23.
Where does StockDrifts get TDC SOFT 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 TDC SOFT Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.