Who has been buying Sanken Electric Co., Ltd. stock?

36 distinct investors have filed 80 disclosed large-shareholding filings in Sanken Electric Co., Ltd. (6707), most recently on 2026-05-01. 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 Sanken Electric Co., Ltd. have?

Sanken Electric Co., Ltd. has 80 buy-side and 43 sell-side disclosures on record, covering ¥90.8B ($585.6M) in total reported value, spanning 2021-03-22 to 2026-05-01.

Where does StockDrifts get Sanken Electric 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.

Sanken Electric Co., Ltd. 6707

Company

サンケン電気株式会社Sanken Electric Co., Ltd.

Investors

Buys

Total Value

¥90.8B ($585.6M)

Avg Return

+34.84%

Last Filing

2026-05-01

Sanken Electric Co., Ltd. (6707) has 80 disclosed large-shareholding filings and 43 disclosed disposals on record, filed by 36 distinct investors. Together those filings cover ¥90.8B ($585.6M) in reported transaction value. The earliest filing StockDrifts holds for Sanken Electric Co., Ltd. is dated 2021-03-22; the most recent is 2026-05-01. 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 +34.84%, 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
2026-06-16	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	7.2M	¥9,302	+10.3%	¥11.1B ($71.8M)
2026-05-01	SELL	unknown	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	592.0K	¥9,663	+4.8%	¥13.2B ($85.3M)
2026-03-23	BUY	Market Buy	オアシスマネジメントカンパニーリミテッド(Oasis Management Company Ltd.) Oasis Management Company Ltd.	activist	2.0M	¥6,512	+34.7%	¥2.1B ($13.7M)
2025-10-22	BUY	Market Buy	株式会社埼玉りそな銀行 Saitama Resona Bank, Limited	strategic	934.4K	¥7,474	+17.4%	¥1.2B ($7.6M)
2025-10-22	BUY	Market Buy	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	405.2K	¥7,474	+17.4%	¥516M ($3.3M)
2025-03-25	BUY	unknown	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	7.2M	¥7,332	+19.6%	¥52.7B ($340.2M)
2025-02-21	SELL	unknown	ゴールドマン・サックス・アンド・カンパニー・エルエルシー Goldman Sachs & Co. LLC	other	0	¥6,445	-36.1%	¥679M ($4.4M)
2025-02-21	BUY	unknown	ゴールドマン・サックス証券株式会社 Goldman Sachs Japan Co.,Ltd.	other	-300	¥6,445	+36.1%	-
2025-02-21	BUY	unknown	ゴールドマン・サックス・インターナショナル Goldman Sachs International	other	1.1M	¥6,445	+36.1%	¥7.1B ($45.9M)
2025-02-07	BUY	unknown	ゴールドマン・サックス・アンド・カンパニー・エルエルシー Goldman Sachs & Co. LLC	other	105.7K	¥5,958	+47.3%	¥630M ($4.1M)
2025-02-07	BUY	unknown	ゴールドマン・サックス・インターナショナル Goldman Sachs International	other	1.9M	¥5,958	+47.3%	¥11.2B ($72.4M)
2025-02-07	BUY	unknown	ゴールドマン・サックス証券株式会社 Goldman Sachs Japan Co.,Ltd.	other	800	¥5,958	+47.3%	¥5M ($31K)
2025-02-06	SELL	unknown	株式会社埼玉りそな銀行 Saitama Resona Bank, Limited	strategic	934.4K	¥5,932	-47.9%	¥1.6B ($10.3M)
2025-02-06	BUY	unknown	りそなアセットマネジメント株式会社 Resona Asset Management Co., Ltd.	other	405.0K	¥5,932	+47.9%	¥298M ($1.9M)
2025-02-06	SELL	unknown	株式会社りそな銀行 Resona Bank, Limited.	other	16.1K	¥5,932	-47.9%	¥6.0B ($38.4M)
2024-12-19	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	335.4K	¥5,969	+47.0%	¥360M ($2.3M)
2024-12-19	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	584.5K	¥5,969	-47.0%	¥1.5B ($9.7M)
2024-12-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	180.0K	¥5,969	+47.0%	¥1.1B ($6.9M)
2024-09-27	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	7.2M	¥6,760	+29.8%	¥526M ($3.4M)
2024-09-17	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	7.1M	¥6,045	+45.1%	¥2.1B ($13.3M)
2024-09-12	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	6.8M	¥5,941	+47.7%	¥2.4B ($15.6M)
2024-08-15	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	6.4M	¥6,635	+32.2%	¥3.0B ($19.1M)
2024-08-09	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	5.9M	¥6,319	+38.8%	¥2.4B ($15.3M)
2024-07-24	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	activist	5.5M	¥8,196	+7.0%	¥1.8B ($11.4M)
2024-07-11	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.3M	¥7,703	+13.9%	¥2.0B ($13.0M)
2024-06-20	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	180.0K	¥7,253	+21.0%	¥1.3B ($8.4M)
2024-06-20	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	277.1K	¥7,253	+21.0%	¥2.0B ($13.0M)
2024-06-20	BUY	negotiated	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	836.0K	¥7,253	+21.0%	¥6.1B ($39.1M)
2024-06-19	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	5.1M	¥6,514	+34.7%	¥1.7B ($10.8M)
2024-03-22	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥6,719	+30.6%	¥32.3B ($208.5M)
2024-01-10	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥7,209	+21.7%	¥34.7B ($223.7M)
2023-10-03	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥8,610	+1.9%	¥41.4B ($267.1M)
2023-10-02	SELL	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	17.9K	¥9,050	+3.1%	¥3.7B ($23.6M)
2023-10-02	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	114.7K	¥9,050	-3.1%	¥1.0B ($6.7M)
2023-10-02	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	577.4K	¥9,050	+3.1%	¥45M ($293K)
2023-10-02	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	200.0K	¥9,050	-3.1%	¥1.8B ($11.7M)
2023-09-28	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥8,750	+0.3%	¥42.1B ($271.5M)
2023-09-19	BUY	negotiated	三菱UFJモルガン・スタンレー証券株式会社 Mitsubishi UFJ Morgan Stanley Securities Co., Ltd.	other	422.2K	¥9,370	-6.4%	¥4.0B ($25.5M)
2023-09-19	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	114.5K	¥9,370	-6.4%	¥1.1B ($6.9M)
2023-09-19	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	581.9K	¥9,370	-6.4%	¥5.5B ($35.2M)
2023-09-19	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	200.0K	¥9,370	-6.4%	¥1.9B ($12.1M)
2023-09-11	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥9,800	-10.5%	¥47.1B ($304.1M)
2023-08-18	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥9,880	-11.2%	¥47.5B ($306.5M)
2023-08-07	SELL	Market Buy	UBS Securities LLC	other	629.6K	¥11,650	+24.7%	¥2.9B ($18.9M)
2023-08-07	BUY	Market Buy	ユービーエス・エイ・ジー(銀行) UBS AG	other	465.0K	¥11,650	-24.7%	¥556M ($3.6M)
2023-07-31	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥14,500	-39.5%	¥69.7B ($449.9M)
2023-07-24	SELL	Market Buy	パーシファル・キャピタル・マネジメント・エルピー(Parsifal Capital Management, LP) Parsifal Capital Management, LP	passive	1.0M	¥13,700	+36.0%	¥3.9B ($25.1M)
2023-07-21	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥13,200	-33.5%	¥63.5B ($409.6M)
2023-07-20	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥13,260	-33.8%	¥63.8B ($411.4M)
2023-07-18	BUY	Market Buy	エフィッシモキャピタルマネージメントピーティーイーエルティーディー(Effissimo Capital Management Pte. Ltd.) Effissimo Capital Management Pte. Ltd.	passive	4.8M	¥13,460	-34.8%	¥64.7B ($417.6M)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Sanken Electric Co., Ltd. stock?: 36 distinct investors have filed 80 disclosed large-shareholding filings in Sanken Electric Co., Ltd. (6707), most recently on 2026-05-01. 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 Sanken Electric Co., Ltd. have?: Sanken Electric Co., Ltd. has 80 buy-side and 43 sell-side disclosures on record, covering ¥90.8B ($585.6M) in total reported value, spanning 2021-03-22 to 2026-05-01.
Where does StockDrifts get Sanken Electric 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 Sanken Electric Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.