Who has been buying TBK Co., Ltd. stock?

7 distinct investors have filed 7 disclosed large-shareholding filings in TBK Co., Ltd. (7277), most recently on 2025-12-11. 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 TBK Co., Ltd. have?

TBK Co., Ltd. has 7 buy-side and 10 sell-side disclosures on record, covering ¥2.3B ($15.0M) in total reported value, spanning 2021-12-07 to 2025-12-11.

Where does StockDrifts get TBK 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.

TBK Co., Ltd. 7277

Company

株式会社TBKTBK Co., Ltd.

Investors

Buys

Total Value

¥2.3B ($15.0M)

Avg Return

+3.50%

Last Filing

2025-12-11

TBK Co., Ltd. (7277) has 7 disclosed large-shareholding filings and 10 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥2.3B ($15.0M) in reported transaction value. The earliest filing StockDrifts holds for TBK Co., Ltd. is dated 2021-12-07; the most recent is 2025-12-11. 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 +3.50%, 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
2025-12-11	BUY	negotiated	ブレイクス・インディア・プライベート・リミテッド(Brakes India Private Limited) Brakes India Private Limited	strategic	3.3M	¥351	+6.8%	¥1.1B ($7.4M)
2025-12-11	BUY	negotiated	ブレイクス・インディア・プライベート・リミテッド(Brakes India Private Limited) Brakes India Private Limited	strategic	3.3M	¥351	+6.8%	¥1.1B ($7.4M)
2025-09-05	BUY	Market Buy	アタナセ・インダストリアル・パートナー (Athanase Industrial Partner) Athanase Industrial Partner	other	1.9M	¥356	+5.3%	¥105M ($676K)
2025-07-07	BUY	unknown	アタナセ・インダストリアル・パートナー Athanase Industrial Partner	other	1.6M	¥300	+25.0%	¥380M ($2.5M)
2025-07-07	SELL	unknown	アタナセ・インダストリアル・パートナー・エービー Athanase Industrial Partner AB	other	0	¥300	-25.0%	¥380M ($2.4M)
2023-10-26	BUY	unknown	アタナセ・インダストリアル・パートナー Athanase Industrial Partner	other	289.5K	¥378	-0.8%	¥109M ($706K)
2023-10-26	BUY	unknown	アタナセ・インダストリアル・パートナー・エービー Athanase Industrial Partner AB	other	1.3M	¥378	-0.8%	¥478M ($3.1M)
2023-02-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.1M	¥246	-52.4%	¥98M ($630K)
2023-01-11	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.5M	¥240	-56.3%	¥81M ($519K)
2022-12-07	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.9M	¥246	-52.4%	¥80M ($514K)
2022-11-08	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.2M	¥282	-33.0%	¥89M ($573K)
2022-09-26	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	161.1K	¥292	-28.4%	¥106M ($682K)
2022-09-26	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	928.7K	¥292	-28.4%	¥6M ($39K)
2022-09-26	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	2.5M	¥292	-28.4%	¥105M ($676K)
2022-07-14	BUY	unknown	いすゞ自動車株式会社 ISUZU MOTORS LIMITED	other	2.8M	¥332	+12.9%	¥929M ($6.0M)
2021-12-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	523.4K	¥397	-5.5%	¥208M ($1.3M)
2021-12-22	BUY	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	951.3K	¥397	-5.5%	¥378M ($2.4M)
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	509.2K	¥411	+8.8%	¥58M ($375K)
2021-12-07	SELL	unknown	みずほ信託銀行株式会社 Mizuho Trust & Banking Co., Ltd.	other	951.3K	¥411	+8.8%	¥5M ($31K)

Frequently asked questions

Who has been buying TBK Co., Ltd. stock?: 7 distinct investors have filed 7 disclosed large-shareholding filings in TBK Co., Ltd. (7277), most recently on 2025-12-11. 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 TBK Co., Ltd. have?: TBK Co., Ltd. has 7 buy-side and 10 sell-side disclosures on record, covering ¥2.3B ($15.0M) in total reported value, spanning 2021-12-07 to 2025-12-11.
Where does StockDrifts get TBK 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 TBK Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.