Who has been buying Socionext Inc. stock?

20 distinct investors have filed 124 disclosed large-shareholding filings in Socionext Inc. (6526), most recently on 2026-03-18. 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 Socionext Inc. have?

Socionext Inc. has 124 buy-side and 101 sell-side disclosures on record, covering ¥666.9B ($4.3B) in total reported value, spanning 2022-10-14 to 2026-03-18.

Where does StockDrifts get Socionext Inc. 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.

Socionext Inc. 6526

Company

株式会社ソシオネクストSocionext Inc.

Investors

Buys

124

Total Value

¥666.9B ($4.3B)

Avg Return

-26.87%

Last Filing

2026-03-18

Socionext Inc. (6526) has 124 disclosed large-shareholding filings and 101 disclosed disposals on record, filed by 20 distinct investors. Together those filings cover ¥666.9B ($4.3B) in reported transaction value. The earliest filing StockDrifts holds for Socionext Inc. is dated 2022-10-14; the most recent is 2026-03-18. 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 -26.87%, 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
2026-08-07	SELL	unknown	野村アセットマネジメント株式会社	other	13.9M	¥1,981	+2.4%	¥856M ($5.5M)
2026-08-07	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	210.9K	¥1,981	+2.4%	¥891M ($5.8M)
2026-08-07	BUY	Market Buy	野村證券株式会社	other	429.3K	¥1,981	-2.4%	¥499M ($3.2M)
2026-07-06	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	2.6M	¥2,700	-22.6%	¥680M ($4.4M)
2026-07-06	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	1.1M	¥2,700	-22.6%	¥1.7B ($11.0M)
2026-07-06	SELL	Market Buy	ブラックロック(ルクセンブルグ)エス・エーS.A.) BlackRock (Luxembourg	passive	0	¥2,700	+22.6%	¥2.2B ($14.1M)
2026-07-06	SELL	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	286.9K	¥2,700	+22.6%	¥389M ($2.5M)
2026-07-06	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	0	¥2,700	+22.6%	¥632M ($4.1M)
2026-07-06	SELL	Market Buy	ブラックロック・アドバイザーズ・エルエルシー BlackRock Advisers, LLC	passive	0	¥2,700	+22.6%	¥2.9B ($18.5M)
2026-07-06	SELL	Market Buy	ブラックロック・ジャパン株式会社	passive	3.7M	¥2,700	+22.6%	¥2.6B ($16.9M)
2026-07-06	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	102.5K	¥2,700	+22.6%	¥389M ($2.5M)
2026-07-06	BUY	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, N.A.	passive	1.8M	¥2,700	-22.6%	¥194M ($1.3M)
2026-05-21	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社	other	8.3M	¥2,637	-14.1%	¥1.7B ($11.0M)
2026-05-21	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	3.9M	¥2,637	+14.1%	¥1.6B ($10.1M)
2026-03-18	BUY	unknown	野村アセットマネジメント株式会社	other	14.3M	¥1,811.5	+1.7%	¥26.4B ($170.4M)
2026-03-18	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	666.2K	¥1,811.5	-1.7%	¥1.2B ($7.9M)
2026-03-18	SELL	unknown	野村證券株式会社	other	178.8K	¥1,811.5	-1.7%	¥329M ($2.1M)
2026-02-05	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	14.8M	¥2,087	+11.7%	¥3.2B ($20.6M)
2026-01-22	SELL	Market Buy	野村アセットマネジメント株式会社	other	15.1M	¥2,360.5	+21.9%	¥27.8B ($179.3M)
2026-01-22	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	52.0K	¥2,360.5	-21.9%	¥96M ($618K)
2026-01-22	BUY	Market Buy	野村證券株式会社	other	1.2M	¥2,360.5	-21.9%	¥2.2B ($14.5M)
2025-12-19	BUY	unknown	アモーヴァ・アセットマネジメント株式会社	other	7.6M	¥2,137.5	-13.8%	¥14.1B ($90.8M)
2025-12-19	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	4.5M	¥2,137.5	+13.8%	¥8.3B ($53.5M)
2025-11-10	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	16.0M	¥2,342	-21.3%	¥421M ($2.7M)
2025-11-10	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-628.9K	¥2,342	+21.3%	¥7.7B ($49.5M)
2025-11-10	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	637.5K	¥2,342	-21.3%	¥1.2B ($7.6M)
2025-11-07	SELL	unknown	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	7.6M	¥2,375.5	+22.4%	¥898M ($5.8M)
2025-11-07	SELL	unknown	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	4.6M	¥2,375.5	+22.4%	¥1.6B ($10.5M)
2025-11-06	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	15.9M	¥2,344.5	+21.4%	¥1.1B ($6.8M)
2025-11-06	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	2.6M	¥2,344.5	-21.4%	¥5.7B ($37.0M)
2025-11-06	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	120.8K	¥2,344.5	+21.4%	¥42M ($272K)
2025-10-21	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	8.0M	¥2,917.5	-36.9%	¥157M ($1.0M)
2025-10-21	BUY	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	5.3M	¥2,917.5	-36.9%	¥735M ($4.7M)
2025-10-17	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	16.3M	¥2,905	+36.6%	¥2.7B ($17.5M)
2025-10-17	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	192.2K	¥2,905	+36.6%	¥2.0B ($12.8M)
2025-10-17	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	151.1K	¥2,905	-36.6%	¥3.7B ($23.9M)
2025-10-01	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	16.9M	¥2,733	+32.6%	¥1.3B ($8.2M)
2025-10-01	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	913.7K	¥2,733	-32.6%	¥983M ($6.3M)
2025-10-01	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	17.2M	¥2,733	+32.6%	¥45.7B ($295.1M)
2025-10-01	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	872.6K	¥2,733	+32.6%	¥98M ($634K)
2025-10-01	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-1.1M	¥2,733	+32.6%	¥57.2B ($368.9M)
2025-10-01	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	189.4K	¥2,733	-32.6%	¥9.8B ($63.4M)
2025-09-30	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	17.4M	¥2,790	-34.0%	¥402M ($2.6M)
2025-09-30	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	558.7K	¥2,790	+34.0%	¥7.8B ($50.2M)
2025-09-30	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	163.4K	¥2,790	-34.0%	¥456M ($2.9M)
2025-09-25	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	17.2M	¥2,890	-36.3%	¥4.5B ($28.8M)
2025-09-25	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	3.3M	¥2,890	-36.3%	¥7.2B ($46.6M)
2025-09-25	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	159.8K	¥2,890	-36.3%	¥15.6B ($100.6M)
2025-09-22	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	15.7M	¥2,957.5	+37.7%	¥745M ($4.8M)
2025-09-22	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	853.6K	¥2,957.5	-37.7%	¥2.5B ($16.3M)

Showing the 50 most recent of 200 filings.

Frequently asked questions

Who has been buying Socionext Inc. stock?: 20 distinct investors have filed 124 disclosed large-shareholding filings in Socionext Inc. (6526), most recently on 2026-03-18. 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 Socionext Inc. have?: Socionext Inc. has 124 buy-side and 101 sell-side disclosures on record, covering ¥666.9B ($4.3B) in total reported value, spanning 2022-10-14 to 2026-03-18.
Where does StockDrifts get Socionext Inc. 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 Socionext Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.