Who has been buying SOMAR Corporation stock?

7 distinct investors have filed 8 disclosed large-shareholding filings in SOMAR Corporation (8152), most recently on 2025-07-07. 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 SOMAR Corporation have?

SOMAR Corporation has 8 buy-side and 3 sell-side disclosures on record, covering ¥301M ($1.9M) in total reported value, spanning 2021-04-07 to 2025-07-07.

Where does StockDrifts get SOMAR Corporation 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.

SOMAR Corporation 8152

Company

ソマール株式会社SOMAR Corporation

Investors

Buys

Total Value

¥301M ($1.9M)

Avg Return

+55.56%

Last Filing

2025-07-07

SOMAR Corporation (8152) has 8 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥301M ($1.9M) in reported transaction value. The earliest filing StockDrifts holds for SOMAR Corporation is dated 2021-04-07; the most recent is 2025-07-07. 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 +55.56%, 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
2025-07-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	89.9K	¥5,350	+6.4%	¥481M ($3.1M)
2025-07-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	61.3K	¥5,350	+6.4%	¥106M ($683K)
2025-04-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	89.9K	¥4,935	+15.3%	¥444M ($2.9M)
2025-04-07	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	10.0K	¥4,935	+15.3%	¥49M ($318K)
2025-04-07	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	strategic	47.5K	¥4,935	+15.3%	¥234M ($1.5M)
2025-04-07	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	42.4K	¥4,935	+15.3%	¥209M ($1.4M)
2025-04-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	41.5K	¥4,935	+15.3%	¥101M ($655K)
2025-02-07	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	170	¥6,340	-10.3%	¥9M ($56K)
2025-02-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	89.9K	¥6,340	-10.3%	¥570M ($3.7M)
2025-02-07	BUY	Market Buy	三井住友DSアセットマネジメント株式会社 Sumitomo Mitsui DS Asset Management Company, Limited	passive	20.9K	¥6,340	-10.3%	¥133M ($855K)
2024-07-29	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	strategic	47.5K	¥4,125	-37.9%	¥16M ($104K)
2024-07-29	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	42.4K	¥4,125	-37.9%	¥15M ($94K)
2024-07-29	SELL	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	900	¥4,125	-37.9%	¥6M ($42K)
2021-04-07	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	18.3K	¥1,938	+193.6%	¥35M ($229K)
2021-04-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	89.9K	¥1,938	+193.6%	¥174M ($1.1M)

Frequently asked questions

Who has been buying SOMAR Corporation stock?: 7 distinct investors have filed 8 disclosed large-shareholding filings in SOMAR Corporation (8152), most recently on 2025-07-07. 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 SOMAR Corporation have?: SOMAR Corporation has 8 buy-side and 3 sell-side disclosures on record, covering ¥301M ($1.9M) in total reported value, spanning 2021-04-07 to 2025-07-07.
Where does StockDrifts get SOMAR Corporation 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 SOMAR Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.