Who has been buying Taka-Q Co., Ltd. stock?

3 distinct investors have filed 3 disclosed large-shareholding filings in Taka-Q Co., Ltd. (8166), most recently on 2026-04-28. 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 Taka-Q Co., Ltd. have?

Taka-Q Co., Ltd. has 3 buy-side and 28 sell-side disclosures on record, covering ¥2.1B ($13.5M) in total reported value, spanning 2024-02-01 to 2026-04-28.

Where does StockDrifts get Taka-Q 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.

Taka-Q Co., Ltd. 8166

Company

株式会社タカキューTaka-Q Co., Ltd.

Investors

Buys

Total Value

¥2.1B ($13.5M)

Avg Return

-1.85%

Last Filing

2026-04-28

Taka-Q Co., Ltd. (8166) has 3 disclosed large-shareholding filings and 28 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥2.1B ($13.5M) in reported transaction value. The earliest filing StockDrifts holds for Taka-Q Co., Ltd. is dated 2024-02-01; the most recent is 2026-04-28. 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 -1.85%, 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
2026-04-28	SELL	unknown	古川徳厚	other	12.7M	¥78	-1.3%	¥663M ($4.3M)
2026-04-28	SELL	unknown	古川徳厚	other	20.8M	¥78	-1.3%	¥102M ($656K)
2026-04-28	SELL	subscription	グロースパートナーズ株式会社	other	20.8M	¥78	-1.3%	¥102M ($656K)
2026-04-28	SELL	subscription	グロースパートナーズ株式会社	other	12.7M	¥78	-1.3%	¥663M ($4.3M)
2026-03-03	SELL	subscription	古川徳厚	other	20.9M	¥79	+1.3%	¥1.6B ($10.5M)
2026-03-03	SELL	subscription	グロースパートナーズ株式会社	other	20.9M	¥79	+1.3%	¥1.6B ($10.5M)
2026-02-05	SELL	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	42.6M	¥87	+10.3%	¥46M ($298K)
2026-01-30	SELL	Market Buy	イオン株式会社 AEON CO.,LTD.	passive	5.0M	¥87	+10.3%	¥69M ($448K)
2026-01-07	SELL	unknown	古川徳厚	other	21.7M	¥86	+9.3%	¥1.7B ($10.9M)
2026-01-07	SELL	unknown	グロースパートナーズ株式会社	other	21.7M	¥86	+9.3%	¥1.7B ($10.9M)
2025-12-26	SELL	Market Buy	イオン株式会社 AEON CO.,LTD.	passive	5.8M	¥82	+4.9%	¥107M ($689K)
2025-12-19	SELL	unknown	古川徳厚	other	22.1M	¥85	+8.2%	¥1.7B ($11.1M)
2025-12-19	SELL	unknown	グロースパートナーズ株式会社	other	22.1M	¥85	+8.2%	¥1.7B ($11.1M)
2025-11-13	SELL	unknown	古川徳厚 Noritsu Furukawa	other	22.9M	¥91	+14.3%	¥28M ($178K)
2025-11-13	SELL	unknown	古川徳厚 Noritsu Furukawa	other	22.9M	¥91	+14.3%	¥28M ($178K)
2025-11-13	SELL	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	22.9M	¥91	+14.3%	¥28M ($178K)
2025-11-13	SELL	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	22.9M	¥91	+14.3%	¥28M ($178K)
2025-10-21	SELL	Market Buy	イオン株式会社 AEON CO.,LTD.	passive	7.1M	¥101	+22.8%	¥971M ($6.3M)
2025-10-14	SELL	unknown	古川徳厚 Noritsu Furukawa	other	23.3M	¥102	+23.5%	¥36M ($229K)
2025-10-14	SELL	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	23.3M	¥102	+23.5%	¥36M ($229K)
2025-10-09	SELL	unknown	古川徳厚 Noritsu Furukawa	other	23.8M	¥104	+25.0%	¥29M ($188K)
2025-10-09	SELL	unknown	古川徳厚 Noritsu Furukawa	other	23.7M	¥104	+25.0%	¥102M ($657K)
2025-10-09	SELL	unknown	古川徳厚 Noritsu Furukawa	other	23.8M	¥104	+25.0%	¥29M ($188K)
2025-10-09	SELL	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	23.8M	¥104	+25.0%	¥29M ($188K)
2025-10-09	SELL	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	23.7M	¥104	+25.0%	¥102M ($657K)
2025-10-09	SELL	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	23.8M	¥104	+25.0%	¥29M ($188K)
2025-07-11	BUY	unknown	古川徳厚 Noritsu Furukawa	other	24.2M	¥108	-27.8%	¥2.6B ($16.9M)
2025-07-11	SELL	unknown	古川徳厚 Noritsu Furukawa	other	24.2M	¥108	+27.8%	¥70M ($450K)
2025-07-11	BUY	unknown	古川徳厚 Noritsu Furukawa	other	24.2M	¥108	-27.8%	¥2.6B ($16.9M)
2025-07-11	BUY	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	24.2M	¥108	-27.8%	¥2.6B ($16.9M)
2025-07-11	SELL	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	24.2M	¥108	+27.8%	¥70M ($450K)
2025-07-11	BUY	unknown	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	24.2M	¥108	-27.8%	¥2.6B ($16.9M)
2024-05-29	BUY	subscription	古川徳厚 Noritsu Furukawa	other	24.2M	¥86	-9.3%	¥2.1B ($13.4M)
2024-05-29	BUY	subscription	グロースパートナーズ株式会社 Growth Partners Co., Ltd.	other	24.2M	¥86	-9.3%	¥2.1B ($13.4M)
2024-02-01	BUY	Market Buy	イオン株式会社 AEON CO.,LTD.	passive	8.1M	¥69	+13.0%	¥8M ($54K)

Frequently asked questions

Who has been buying Taka-Q Co., Ltd. stock?: 3 distinct investors have filed 3 disclosed large-shareholding filings in Taka-Q Co., Ltd. (8166), most recently on 2026-04-28. 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 Taka-Q Co., Ltd. have?: Taka-Q Co., Ltd. has 3 buy-side and 28 sell-side disclosures on record, covering ¥2.1B ($13.5M) in total reported value, spanning 2024-02-01 to 2026-04-28.
Where does StockDrifts get Taka-Q 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 Taka-Q Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.