Who has been buying AMBITION DX HOLDINGS Co., Ltd. stock?

4 distinct investors have filed 4 disclosed large-shareholding filings in AMBITION DX HOLDINGS Co., Ltd. (3300), most recently on 2026-04-07. 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 AMBITION DX HOLDINGS Co., Ltd. have?

AMBITION DX HOLDINGS Co., Ltd. has 4 buy-side and 14 sell-side disclosures on record, covering ¥18.9B ($121.8M) in total reported value, spanning 2021-05-28 to 2026-04-07.

Where does StockDrifts get AMBITION DX HOLDINGS 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.

AMBITION DX HOLDINGS Co., Ltd. 3300

Company

株式会社アンビションDXホールディングスAMBITION DX HOLDINGS Co., Ltd.

Investors

Buys

Total Value

¥18.9B ($121.8M)

Avg Return

+6.30%

Last Filing

2026-04-07

AMBITION DX HOLDINGS Co., Ltd. (3300) has 4 disclosed large-shareholding filings and 14 disclosed disposals on record, filed by 4 distinct investors. Together those filings cover ¥18.9B ($121.8M) in reported transaction value. The earliest filing StockDrifts holds for AMBITION DX HOLDINGS Co., Ltd. is dated 2021-05-28; the most recent is 2026-04-07. 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 +6.30%, 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
2026-04-07	SELL	unknown	株式会社TSコーポレーション	strategic	2.8M	¥2,520	+4.6%	¥2M ($12K)
2026-04-07	BUY	unknown	清水剛	activist	1.3M	¥2,520	-4.6%	¥3.3B ($21.0M)
2026-01-22	BUY	unknown	株式会社TSコーポレーション	strategic	2.8M	¥2,279	+10.1%	¥7.1B ($46.0M)
2026-01-22	SELL	unknown	清水剛	activist	1.3M	¥2,279	-10.1%	¥3.2B ($20.9M)
2026-01-22	BUY	unknown	株式会社TSコーポレーション	strategic	2.8M	¥2,279	+10.1%	¥7.1B ($46.0M)
2026-01-22	SELL	unknown	清水剛	activist	1.3M	¥2,279	-10.1%	¥3.2B ($20.9M)
2025-12-09	SELL	unknown	株式会社TSコーポレーション	strategic	2.5M	¥2,185	-14.8%	¥6.4B ($41.2M)
2025-12-09	SELL	unknown	清水剛	activist	1.6M	¥2,185	-14.8%	¥4.0B ($25.8M)
2025-10-31	BUY	Market Buy	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	2.5M	¥2,421	+3.6%	¥6.2B ($39.7M)
2025-10-31	BUY	Market Buy	清水剛 SHIMIZU TAKESHI	activist	1.6M	¥2,421	+3.6%	¥128M ($823K)
2025-09-26	BUY	unknown	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	2.5M	¥2,654	-5.5%	¥6.8B ($43.6M)
2025-09-26	BUY	unknown	清水剛 Gou Shimizu	activist	1.6M	¥2,654	-5.5%	¥4.2B ($27.3M)
2025-08-07	SELL	unknown	清水剛 Gou Shimizu	activist	1.6M	¥2,475	-1.4%	¥4.2B ($26.9M)
2025-08-07	BUY	unknown	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	2.5M	¥2,475	+1.4%	¥4.5B ($28.9M)
2025-06-05	SELL	unknown	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	720.0K	¥2,219	-13.1%	¥56M ($363K)
2025-06-05	SELL	unknown	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	720.0K	¥2,219	-13.1%	¥48M ($311K)
2025-06-05	SELL	unknown	清水剛 Gou Shimizu	activist	3.4M	¥2,219	-13.1%	¥182M ($1.2M)
2025-06-05	SELL	unknown	清水剛 Gou Shimizu	activist	3.4M	¥2,219	-13.1%	¥216M ($1.4M)
2024-08-21	SELL	unknown	株式会社エアトリ AirTrip Corp.	other	452.6K	¥1,543	-62.6%	¥362M ($2.3M)
2024-08-21	SELL	unknown	株式会社エアトリ AirTrip Corp.	other	331.1K	¥1,543	-62.6%	¥188M ($1.2M)
2023-05-09	BUY	unknown	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	720.0K	¥719	+249.0%	¥518M ($3.3M)
2023-05-09	BUY	unknown	清水剛 Gou Shimizu	activist	3.4M	¥719	+249.0%	¥2.5B ($15.9M)
2022-04-25	BUY	unknown	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	720.0K	¥558	+349.6%	¥402M ($2.6M)
2022-04-25	BUY	unknown	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	720.0K	¥558	+349.6%	¥402M ($2.6M)
2022-04-25	BUY	unknown	清水剛 Gou Shimizu	activist	3.4M	¥558	+349.6%	¥1.9B ($12.3M)
2022-04-25	BUY	unknown	清水剛 Gou Shimizu	activist	3.4M	¥558	+349.6%	¥1.9B ($12.3M)
2021-08-27	SELL	subscription	マッコーリーバンクリミテッド (Macquarie Bank Limited) Macquarie Bank Limited	passive	0	¥635	-295.1%	¥318M ($2.0M)
2021-05-28	BUY	unknown	株式会社TSコーポレーション TS Corporation Co., Ltd.	strategic	720.0K	¥755	+232.3%	¥544M ($3.5M)
2021-05-28	SELL	unknown	清水剛 Gou Shimizu	activist	3.4M	¥755	-232.3%	¥51M ($328K)

Frequently asked questions

Who has been buying AMBITION DX HOLDINGS Co., Ltd. stock?: 4 distinct investors have filed 4 disclosed large-shareholding filings in AMBITION DX HOLDINGS Co., Ltd. (3300), most recently on 2026-04-07. 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 AMBITION DX HOLDINGS Co., Ltd. have?: AMBITION DX HOLDINGS Co., Ltd. has 4 buy-side and 14 sell-side disclosures on record, covering ¥18.9B ($121.8M) in total reported value, spanning 2021-05-28 to 2026-04-07.
Where does StockDrifts get AMBITION DX HOLDINGS 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 AMBITION DX HOLDINGS Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.