Who has been buying Sohgo Security Services Co.,Ltd. stock?

15 distinct investors have filed 13 disclosed large-shareholding filings in Sohgo Security Services Co.,Ltd. (2331), most recently on 2026-05-13. 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 Sohgo Security Services Co.,Ltd. have?

Sohgo Security Services Co.,Ltd. has 13 buy-side and 8 sell-side disclosures on record, covering ¥44.4B ($286.5M) in total reported value, spanning 2021-11-05 to 2026-05-13.

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.

Sohgo Security Services Co.,Ltd. 2331

Company

綜合警備保障株式会社Sohgo Security Services Co.,Ltd.

Investors

Buys

Total Value

¥44.4B ($286.5M)

Avg Return

+29.11%

Last Filing

2026-05-13

Sohgo Security Services Co.,Ltd. (2331) has 13 disclosed large-shareholding filings and 8 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥44.4B ($286.5M) in reported transaction value. The earliest filing StockDrifts holds for Sohgo Security Services Co.,Ltd. is dated 2021-11-05; the most recent is 2026-05-13. Across these filings the average return since disclosure is +29.11%, 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
2026-08-21	BUY	Market Buy	アセットマネジメントOne株式会社	other	18.7M	¥1,184.5	+2.4%	¥3.9B ($25.3M)
2026-08-21	SELL	unknown	株式会社みずほ銀行	other	8.4M	¥1,184.5	-2.4%	¥7.6B ($48.7M)
2026-08-21	BUY	unknown	みずほ証券株式会社	other	1.5M	¥1,184.5	-	-
2026-05-13	BUY	unknown	村井温	strategic	14.8M	¥1,133	-	¥16.8B ($108.2M)
2026-05-13	BUY	unknown	綜合商事株式会社	strategic	36.9M	¥1,133	-	-
2026-05-13	BUY	unknown	かまくら商事株式会社	strategic	9.3M	¥1,133	-	-
2026-05-13	BUY	unknown	きずな商事株式会社	strategic	26.1M	¥1,133	-	-
2026-05-13	BUY	unknown	綜合商事株式会社	strategic	36.9M	¥1,133	-	-
2026-05-13	BUY	unknown	村井温	strategic	14.8M	¥1,133	-	¥16.8B ($108.2M)
2026-05-13	BUY	unknown	村井豪	strategic	3.4M	¥1,133	-	-
2026-05-13	BUY	unknown	かまくら商事株式会社	strategic	9.3M	¥1,133	-	-
2026-05-13	BUY	unknown	きずな商事株式会社	strategic	26.1M	¥1,133	-	-
2026-05-13	BUY	unknown	村井豪	strategic	3.4M	¥1,133	-	-
2026-05-13	BUY	unknown	綜合商事株式会社	strategic	36.9M	¥1,133	-	¥41.9B ($270.0M)
2026-01-09	BUY	Market Buy	アセットマネジメントOne株式会社	other	15.4M	¥1,246	-2.7%	¥6.5B ($42.2M)
2026-01-09	BUY	Market Buy	株式会社みずほ銀行	other	14.8M	¥1,246	-	-
2026-01-09	BUY	Market Buy	みずほ証券株式会社	other	1.5M	¥1,246	-	-
2024-10-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	1.5M	¥1,033	+17.4%	¥1.5B ($9.9M)
2024-10-22	BUY	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	10.2M	¥1,033	+17.4%	¥10.5B ($67.6M)
2024-10-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	other	14.8M	¥1,033	+17.4%	¥15.3B ($98.7M)
2024-04-22	SELL	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	14.8M	¥854.2	-42.0%	¥2.8B ($18.0M)
2024-04-22	SELL	unknown	アセットマネジメントOne株式会社 Asset Management One Co., Ltd.	other	10.2M	¥854.2	-42.0%	¥1.8B ($11.5M)
2024-02-16	SELL	unknown	かまくら商事株式会社 Kamakura Shoji Co., Ltd.	strategic	9.3M	¥786.9	-54.1%	¥9.0B ($58.0M)
2024-02-16	BUY	unknown	村井豪 Tsuyoshi Murai	strategic	3.4M	¥786.9	-	-
2024-02-16	BUY	unknown	きずな商事株式会社 Kizuna Shoji Co., Ltd.	strategic	26.1M	¥786.9	+54.1%	¥9.0B ($58.0M)
2022-06-06	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	1.2M	¥707	+71.5%	¥130M ($838K)
2022-06-06	SELL	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	230.3K	¥707	-71.5%	¥29M ($186K)
2022-06-06	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	174.7K	¥707	-	-
2022-06-06	SELL	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	597.4K	¥707	-71.5%	¥296M ($1.9M)
2022-06-06	SELL	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	933.2K	¥707	-71.5%	¥317M ($2.0M)
2022-06-06	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	485.0K	¥707	-71.5%	¥375M ($2.4M)
2022-06-06	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	73.6K	¥707	-71.5%	¥87M ($559K)
2021-11-05	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	1.0M	¥968	+25.3%	¥1.0B ($6.5M)
2021-11-05	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	274.9K	¥968	+25.3%	¥266M ($1.7M)
2021-11-05	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	171.3K	¥968	+25.3%	¥166M ($1.1M)
2021-11-05	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	1.0M	¥968	+25.3%	¥985M ($6.4M)
2021-11-05	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	1.4M	¥968	+25.3%	¥1.3B ($8.6M)
2021-11-05	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 BlackRock Institutional Trust Company, N.A.	passive	1.0M	¥968	+25.3%	¥989M ($6.4M)
2021-11-05	BUY	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	194.9K	¥968	+25.3%	¥189M ($1.2M)

Frequently asked questions

Who has been buying Sohgo Security Services Co.,Ltd. stock?: 15 distinct investors have filed 13 disclosed large-shareholding filings in Sohgo Security Services Co.,Ltd. (2331), most recently on 2026-05-13. 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 Sohgo Security Services Co.,Ltd. have?: Sohgo Security Services Co.,Ltd. has 13 buy-side and 8 sell-side disclosures on record, covering ¥44.4B ($286.5M) in total reported value, spanning 2021-11-05 to 2026-05-13.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.