Who has been buying Taihei Machinery Works, Limited stock?

6 distinct investors have filed 10 disclosed large-shareholding filings in Taihei Machinery Works, Limited (6342), most recently on 2026-02-18. 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 Taihei Machinery Works, Limited have?

Taihei Machinery Works, Limited has 10 buy-side and 5 sell-side disclosures on record, covering ¥1.1B ($7.2M) in total reported value, spanning 2022-10-06 to 2026-02-18.

Where does StockDrifts get Taihei Machinery Works, Limited 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.

Taihei Machinery Works, Limited 6342

Company

株式会社太平製作所Taihei Machinery Works, Limited

Investors

Buys

Total Value

¥1.1B ($7.2M)

Avg Return

+30.33%

Last Filing

2026-02-18

Taihei Machinery Works, Limited (6342) has 10 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥1.1B ($7.2M) in reported transaction value. The earliest filing StockDrifts holds for Taihei Machinery Works, Limited is dated 2022-10-06; the most recent is 2026-02-18. 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 +30.33%, 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
2026-05-20	BUY	Market Buy	株式会社UH6	passive	2.3K	¥2,735	-2.1%	¥6M ($41K)
2026-05-20	SELL	unknown	株式会社UH5	unknown	0	¥2,735	+2.1%	¥6M ($40K)
2026-05-20	BUY	Market Buy	株式会社UH Partners 2	passive	7.5K	¥2,735	-2.1%	¥21M ($132K)
2026-05-20	BUY	Market Buy	光通信株式会社	passive	97.1K	¥2,735	-2.1%	¥23M ($146K)
2026-02-18	BUY	Market Buy	光通信株式会社	passive	88.8K	¥3,105	-8.9%	¥251M ($1.6M)
2026-02-18	BUY	Market Buy	株式会社UH5	passive	2.3K	¥3,105	+8.9%	¥7M ($42K)
2026-01-19	BUY	Market Buy	株式会社UH5	passive	2.3K	¥2,945	-3.9%	¥7M ($42K)
2026-01-19	BUY	Market Buy	光通信株式会社	passive	72.9K	¥2,945	-3.9%	¥206M ($1.3M)
2026-01-14	BUY	unknown	太平製作所取引先持株会理事長松井隆二 RYUJI MATSUI	strategic	93.1K	¥2,867	-1.3%	¥267M ($1.7M)
2026-01-09	SELL	unknown	太平製作所取引先持株会理事長阿知波眞人 MAHITO ACHIHA	strategic	0	¥2,870	+1.4%	¥260M ($1.7M)
2025-02-12	SELL	unknown	木戸修 KIDO OSAMU	strategic	0	¥3,000	+5.7%	¥285M ($1.8M)
2024-12-09	SELL	unknown	木戸修 KIDO OSAMU	strategic	95.0K	¥2,753	-2.8%	¥110M ($711K)
2024-03-26	SELL	unknown	太平製作所取引先持株会理事長阿知波眞人 Client stock ownership Board Chairman Mahito Achiha	strategic	90.7K	¥3,410	+17.0%	¥187M ($1.2M)
2023-12-27	BUY	Market Buy	太平製作所取引先持株会理事長阿知波眞人 Client stock ownership Board Chairman Mahito Achiha	strategic	145.7K	¥2,951	-4.1%	¥44M ($286K)
2023-04-14	SELL	unknown	木戸修 KIDO OSAMU	strategic	1.1M	¥1,730	-63.6%	¥496M ($3.2M)
2023-04-14	BUY	Market Buy	木戸修 KIDO OSAMU	strategic	1.4M	¥1,730	+63.6%	¥345M ($2.2M)
2023-04-12	BUY	Market Buy	木戸修 KIDO OSAMU	strategic	1.4M	¥1,726	+64.0%	¥417M ($2.7M)
2023-04-06	BUY	Market Buy	木戸修 KIDO OSAMU	strategic	1.2M	¥1,721	+64.4%	¥457M ($2.9M)
2023-03-22	BUY	unknown	木戸修 KIDO OSAMU	strategic	930.0K	¥1,716	+64.9%	¥1.6B ($10.3M)
2022-10-06	BUY	Market Buy	太平製作所取引先持株会理事長阿知波眞人 Client stock ownership Board Chairman Mahito Achiha	strategic	130.7K	¥1,680	+68.5%	¥26M ($166K)
2022-10-06	BUY	unknown	太平製作所取引先持株会理事長阿知波眞人 Client stock ownership Board Chairman Mahito Achiha	strategic	130.7K	¥1,680	+68.5%	¥26M ($166K)

Frequently asked questions

Who has been buying Taihei Machinery Works, Limited stock?: 6 distinct investors have filed 10 disclosed large-shareholding filings in Taihei Machinery Works, Limited (6342), most recently on 2026-02-18. 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 Taihei Machinery Works, Limited have?: Taihei Machinery Works, Limited has 10 buy-side and 5 sell-side disclosures on record, covering ¥1.1B ($7.2M) in total reported value, spanning 2022-10-06 to 2026-02-18.
Where does StockDrifts get Taihei Machinery Works, Limited 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 Taihei Machinery Works, Limited. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.