Who has been buying Toho Acetylene Co., Ltd. stock?

9 distinct investors have filed 17 disclosed large-shareholding filings in Toho Acetylene Co., Ltd. (4093), most recently on 2026-03-27. 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 Toho Acetylene Co., Ltd. have?

Toho Acetylene Co., Ltd. has 17 buy-side and 5 sell-side disclosures on record, covering ¥2.8B ($18.3M) in total reported value, spanning 2021-03-22 to 2026-03-27.

Where does StockDrifts get Toho Acetylene 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.

Toho Acetylene Co., Ltd. 4093

Company

東邦アセチレン株式会社Toho Acetylene Co., Ltd.

Investors

Buys

Total Value

¥2.8B ($18.3M)

Avg Return

+28.08%

Last Filing

2026-03-27

Toho Acetylene Co., Ltd. (4093) has 17 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥2.8B ($18.3M) in reported transaction value. The earliest filing StockDrifts holds for Toho Acetylene Co., Ltd. is dated 2021-03-22; the most recent is 2026-03-27. 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 +28.08%, 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
2026-06-25	BUY	Market Buy	さくら損害保険株式会社	passive	87.5K	¥427	+0.0%	¥37M ($241K)
2026-06-25	BUY	Market Buy	株式会社UH7	passive	80.8K	¥427	+0.0%	¥35M ($223K)
2026-06-25	BUY	Market Buy	株式会社UH Partners 2	passive	2.6M	¥427	+0.0%	¥1.1B ($7.2M)
2026-06-25	BUY	Market Buy	株式会社UH Partners 3	passive	2.1M	¥427	+0.0%	¥151M ($974K)
2026-06-25	BUY	Market Buy	光通信株式会社	passive	2.6M	¥427	+0.0%	¥1.1B ($7.2M)
2026-03-27	BUY	Market Buy	株式会社ザッパラス	passive	80.8K	¥457	+2.4%	¥36M ($232K)
2026-03-27	BUY	Market Buy	さくら損害保険株式会社	passive	87.5K	¥457	+2.4%	¥39M ($252K)
2026-03-27	BUY	Market Buy	株式会社UH Partners 3	passive	1.8M	¥457	-2.4%	¥781M ($5.0M)
2026-03-27	BUY	Market Buy	株式会社UH Partners 2	passive	2.6M	¥457	+2.4%	¥1.2B ($7.5M)
2026-03-27	BUY	Market Buy	光通信株式会社	passive	2.6M	¥457	+2.4%	¥1.2B ($7.5M)
2026-03-04	BUY	Market Buy	株式会社UH Partners 2	passive	2.6M	¥420	-6.2%	¥1.2B ($7.5M)
2026-03-04	BUY	Market Buy	株式会社ザッパラス	passive	80.8K	¥420	-6.2%	¥36M ($232K)
2026-03-04	BUY	Market Buy	さくら損害保険株式会社	passive	87.5K	¥420	-6.2%	¥39M ($252K)
2026-03-04	BUY	Market Buy	株式会社UH Partners 3	passive	1.4M	¥420	+6.2%	¥620M ($4.0M)
2026-03-04	BUY	Market Buy	光通信株式会社	passive	2.6M	¥420	-6.2%	¥1.2B ($7.5M)
2025-12-19	BUY	Market Buy	株式会社ザッパラス	passive	80.8K	¥358	-24.6%	¥36M ($232K)
2025-12-19	BUY	Market Buy	さくら損害保険株式会社	passive	87.5K	¥358	-24.6%	¥39M ($252K)
2025-12-19	BUY	Market Buy	株式会社UH Partners 3	passive	1.0M	¥358	+24.6%	¥461M ($3.0M)
2025-12-19	BUY	Market Buy	株式会社UH Partners 2	passive	2.6M	¥358	-24.6%	¥1.2B ($7.5M)
2025-12-19	BUY	Market Buy	光通信株式会社	passive	2.6M	¥358	-24.6%	¥1.2B ($7.5M)
2025-09-26	BUY	Market Buy	株式会社ザッパラス Zappalas Co., Ltd.	passive	80.8K	¥358	+24.6%	¥29M ($187K)
2025-09-26	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	87.5K	¥358	+24.6%	¥31M ($202K)
2025-09-26	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	683.2K	¥358	+24.6%	¥85M ($550K)
2025-09-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.6M	¥358	+24.6%	¥935M ($6.0M)
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥358	+24.6%	¥932M ($6.0M)
2025-06-11	BUY	Market Buy	株式会社ザッパラス Zappalas Co., Ltd.	passive	80.8K	¥357	+24.9%	¥29M ($186K)
2025-06-11	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	87.5K	¥357	+24.9%	¥31M ($202K)
2025-06-11	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	444.6K	¥357	+24.9%	¥129M ($831K)
2025-06-11	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.6M	¥357	+24.9%	¥933M ($6.0M)
2025-06-11	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥357	+24.9%	¥929M ($6.0M)
2025-05-26	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	83.6K	¥343	+30.0%	¥29M ($185K)
2025-05-26	BUY	Market Buy	株式会社ザッパラス Zappalas Co., Ltd.	passive	80.8K	¥343	+30.0%	¥28M ($179K)
2025-05-26	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	87.5K	¥343	+30.0%	¥30M ($194K)
2025-05-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.6M	¥343	+30.0%	¥106M ($682K)
2025-05-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥343	+30.0%	¥892M ($5.8M)
2025-04-21	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.3M	¥358	+24.6%	¥132M ($849K)
2025-04-21	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥358	+24.6%	¥932M ($6.0M)
2025-04-21	BUY	Market Buy	株式会社ザッパラス Zappalas Co., Ltd.	passive	80.8K	¥358	+24.6%	¥29M ($187K)
2025-04-21	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	87.5K	¥358	+24.6%	¥31M ($202K)
2025-04-10	BUY	Market Buy	株式会社ザッパラス Zappalas Co., Ltd.	passive	80.8K	¥347	+28.5%	¥28M ($181K)
2025-04-10	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥347	+28.5%	¥903M ($5.8M)
2025-04-10	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	87.5K	¥347	+28.5%	¥30M ($196K)
2025-04-10	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.9M	¥347	+28.5%	¥109M ($706K)
2025-03-12	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	87.5K	¥363	+22.9%	¥32M ($205K)
2025-03-12	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.6M	¥363	+22.9%	¥130M ($837K)
2025-03-12	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥363	+22.9%	¥945M ($6.1M)
2025-02-13	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	87.5K	¥361	+23.6%	¥32M ($204K)
2025-02-13	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.3M	¥361	+23.6%	¥129M ($832K)
2025-02-13	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥361	+23.6%	¥939M ($6.1M)
2024-12-09	BUY	Market Buy	さくら損害保険株式会社 Sakura General Insurance Co., Ltd.	passive	87.5K	¥367	+21.5%	¥15M ($100K)

Showing the 50 most recent of 68 filings.

Frequently asked questions

Who has been buying Toho Acetylene Co., Ltd. stock?: 9 distinct investors have filed 17 disclosed large-shareholding filings in Toho Acetylene Co., Ltd. (4093), most recently on 2026-03-27. 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 Toho Acetylene Co., Ltd. have?: Toho Acetylene Co., Ltd. has 17 buy-side and 5 sell-side disclosures on record, covering ¥2.8B ($18.3M) in total reported value, spanning 2021-03-22 to 2026-03-27.
Where does StockDrifts get Toho Acetylene 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 Toho Acetylene Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.