Who has been buying Sumitomo Electric Industries, Ltd. stock?

17 distinct investors have filed 10 disclosed large-shareholding filings in Sumitomo Electric Industries, Ltd. (5802), most recently on 2026-01-08. 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 Sumitomo Electric Industries, Ltd. have?

Sumitomo Electric Industries, Ltd. has 10 buy-side and 11 sell-side disclosures on record, covering ¥114.2B ($736.8M) in total reported value, spanning 2021-07-05 to 2026-01-08.

Where does StockDrifts get Sumitomo Electric Industries, 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.

Sumitomo Electric Industries, Ltd. 5802

Company

住友電気工業株式会社Sumitomo Electric Industries, Ltd.

Investors

Buys

Total Value

¥114.2B ($736.8M)

Avg Return

+324.07%

Last Filing

2026-01-08

Sumitomo Electric Industries, Ltd. (5802) has 10 disclosed large-shareholding filings and 11 disclosed disposals on record, filed by 17 distinct investors. Together those filings cover ¥114.2B ($736.8M) in reported transaction value. The earliest filing StockDrifts holds for Sumitomo Electric Industries, Ltd. is dated 2021-07-05; the most recent is 2026-01-08. 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 +324.07%, 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
2026-01-08	SELL	unknown	アモーヴァ・アセットマネジメント株式会社	other	19.0M	¥6,356	-57.0%	¥189.7B ($1.2B)
2026-01-08	SELL	unknown	三井住友信託銀行株式会社	other	2.6M	¥6,356	-57.0%	¥25.7B ($165.5M)
2026-01-08	SELL	unknown	三井住友トラスト・アセットマネジメント株式会社	other	20.1M	¥6,356	-57.0%	¥200.2B ($1.3B)
2025-09-19	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社 Amova Asset Management Co., Ltd.	other	20.1M	¥4,184	+138.4%	¥9.3B ($60.0M)
2025-09-19	SELL	Market Buy	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	23.7M	¥4,184	-138.4%	¥6.6B ($42.9M)
2025-09-19	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.3M	¥4,184	+138.4%	¥17.9B ($115.7M)
2025-07-04	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	47.7M	¥3,110	+220.8%	¥22.7B ($146.6M)
2025-07-04	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	unknown	0	¥3,110	+220.8%	-
2025-07-04	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.7M	¥3,110	-220.8%	¥10.9B ($70.1M)
2025-07-04	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	36.7K	¥3,110	+220.8%	¥114M ($736K)
2024-11-20	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	40.5M	¥2,886	+245.7%	¥5.3B ($34.0M)
2024-11-20	BUY	Market Buy	ノムラセキュリテーズインターナショナル NOMURA SECURITIES INTERNATIONAL,Inc.	other	0	¥2,886	+245.7%	-
2024-11-20	BUY	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	5.2M	¥2,886	+245.7%	¥15.0B ($96.5M)
2024-11-20	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	24.8K	¥2,886	-245.7%	¥320.8B ($2.1B)
2024-06-06	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	17.8M	¥2,513.5	+296.9%	¥44.9B ($289.4M)
2024-06-06	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	25.2M	¥2,513.5	-296.9%	¥20.0B ($128.7M)
2024-06-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.3M	¥2,513.5	+296.9%	¥10.8B ($69.5M)
2024-05-20	SELL	Market Buy	ブラックロック・インベストメント・マネジメント(ユーケー)リミテッドLimited) BlackRock Investment Management (UK	passive	749.9K	¥2,427.5	-311.0%	¥5.8B ($37.3M)
2024-05-20	SELL	Market Buy	ブラックロック・インベストメント・マネジメント・エルエルシー BlackRock Investment Management LLC	passive	585.8K	¥2,427.5	-311.0%	¥578M ($3.7M)
2024-05-20	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	5.6M	¥2,427.5	+311.0%	¥6.2B ($39.8M)
2024-05-20	BUY	Market Buy	ブラックロック・ライフ・リミテッド BlackRock Life Limited	passive	278.6K	¥2,427.5	+311.0%	¥75.2B ($484.9M)
2024-05-20	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	2.1M	¥2,427.5	+311.0%	¥2.3B ($14.9M)
2024-05-20	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	1.9M	¥2,427.5	+311.0%	¥4.5B ($29.3M)
2024-05-20	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	17.8M	¥2,427.5	+311.0%	¥17.0B ($109.4M)
2024-05-20	SELL	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	9.6M	¥2,427.5	-311.0%	¥5.8B ($37.3M)
2024-05-20	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	13.4M	¥2,427.5	+311.0%	¥7.3B ($47.2M)
2021-12-07	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	38.6M	¥1,557.5	+540.5%	¥60.1B ($387.9M)
2021-12-07	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.1M	¥1,557.5	+540.5%	¥1.8B ($11.4M)
2021-07-05	SELL	subscription	シルチェスター・インターナショナル・インベスターズ・エルエルピー (Silchester International Investors LLP) Silchester International Investors LLP	activist	31.8M	¥1,630.5	-511.8%	¥13.1B ($84.4M)

Frequently asked questions

Who has been buying Sumitomo Electric Industries, Ltd. stock?: 17 distinct investors have filed 10 disclosed large-shareholding filings in Sumitomo Electric Industries, Ltd. (5802), most recently on 2026-01-08. 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 Sumitomo Electric Industries, Ltd. have?: Sumitomo Electric Industries, Ltd. has 10 buy-side and 11 sell-side disclosures on record, covering ¥114.2B ($736.8M) in total reported value, spanning 2021-07-05 to 2026-01-08.
Where does StockDrifts get Sumitomo Electric Industries, 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 Sumitomo Electric Industries, Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.