Who has been buying Sanshin Electronics Co., Ltd. stock?

5 distinct investors have filed 5 disclosed large-shareholding filings in Sanshin Electronics Co., Ltd. (8150), most recently on 2025-03-04. 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 Sanshin Electronics Co., Ltd. have?

Sanshin Electronics Co., Ltd. has 5 buy-side and 3 sell-side disclosures on record, covering ¥3.3B ($21.4M) in total reported value, spanning 2021-07-28 to 2025-03-04.

Where does StockDrifts get Sanshin Electronics 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.

Sanshin Electronics Co., Ltd. 8150

Company

三信電気株式会社Sanshin Electronics Co., Ltd.

Investors

Buys

Total Value

¥3.3B ($21.4M)

Avg Return

+47.43%

Last Filing

2025-03-04

Sanshin Electronics Co., Ltd. (8150) has 5 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥3.3B ($21.4M) in reported transaction value. The earliest filing StockDrifts holds for Sanshin Electronics Co., Ltd. is dated 2021-07-28; the most recent is 2025-03-04. 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 +47.43%, 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
2025-03-04	SELL	unknown	有限会社松永榮一 Matsunaga Eiichi, Ltd.	other	505.1K	¥2,079	-31.8%	¥2.3B ($14.7M)
2025-02-21	BUY	unknown	有限会社松永榮一 Matsunaga Eiichi, Ltd.	other	1.6M	¥1,986	+37.9%	¥3.2B ($20.5M)
2024-10-04	BUY	unknown	有限会社松永榮一 Matsunaga Eiichi, Ltd.	other	1.6M	¥2,044	+34.0%	¥3.3B ($21.1M)
2024-09-12	BUY	unknown	松永光正 Mitsumasa Matsunaga	activist	148.6K	¥1,926	+42.2%	¥286M ($1.8M)
2024-09-12	BUY	unknown	松永光正 Mitsumasa Matsunaga	activist	148.6K	¥1,926	+42.2%	¥286M ($1.8M)
2024-09-12	BUY	unknown	有限会社松永榮一 Matsunaga Eiichi, Ltd.	other	1.6M	¥1,926	+42.2%	¥3.1B ($19.9M)
2024-09-12	BUY	unknown	有限会社松永榮一 Matsunaga Eiichi, Ltd.	other	1.6M	¥1,926	+42.2%	¥3.1B ($19.9M)
2023-09-07	BUY	unknown	有限会社松永榮一 yugengaisya matsunagaeiichi	other	1.6M	¥2,205	+24.2%	¥3.5B ($22.8M)
2023-09-07	BUY	Market Buy	有限会社松永榮一 yugengaisya matsunagaeiichi	other	1.6M	¥2,205	+24.2%	¥1.6B ($10.5M)
2023-07-07	BUY	Market Buy	有限会社松永榮一 yugengaisya matsunagaeiichi	other	1.6M	¥2,137	+28.2%	¥1.6B ($10.2M)
2022-02-22	SELL	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	615.2K	¥1,648	-66.2%	¥376M ($2.4M)
2021-12-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	842.7K	¥1,444	+89.7%	¥1.2B ($7.9M)
2021-08-20	SELL	unknown	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	unknown	0	¥1,627	-68.3%	¥340M ($2.2M)
2021-08-20	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	232.5K	¥1,627	+68.3%	¥272M ($1.8M)
2021-07-28	BUY	unknown	株式会社エスグラントコーポレーション S-Grant Corporation Co., Ltd.	activist	207.7K	¥2,161	+26.8%	¥194M ($1.3M)
2021-07-28	BUY	unknown	株式会社シティインデックスイレブンス City Index Eleven Co., Ltd.	activist	6.6M	¥2,161	+26.8%	¥14.2B ($91.9M)

Frequently asked questions

Who has been buying Sanshin Electronics Co., Ltd. stock?: 5 distinct investors have filed 5 disclosed large-shareholding filings in Sanshin Electronics Co., Ltd. (8150), most recently on 2025-03-04. 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 Sanshin Electronics Co., Ltd. have?: Sanshin Electronics Co., Ltd. has 5 buy-side and 3 sell-side disclosures on record, covering ¥3.3B ($21.4M) in total reported value, spanning 2021-07-28 to 2025-03-04.
Where does StockDrifts get Sanshin Electronics 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 Sanshin Electronics Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.