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The Sumitomo Warehouse Co., Ltd. 9303

Company
株式会社住友倉庫The Sumitomo Warehouse Co., Ltd.
Investors
3
Buys
4
Total Value
¥511M ($3.3M)
Avg Return
+61.59%
Last Filing
2025-09-19

The Sumitomo Warehouse Co., Ltd. (9303) has 4 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥511M ($3.3M) in reported transaction value. The earliest filing StockDrifts holds for The Sumitomo Warehouse Co., Ltd. is dated 2023-01-19; the most recent is 2025-09-19. 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 +61.59%, measured from each filing date to the latest available close.

Price & insider activity (12 months)

Recent filings

DateTypeSourceInsiderPurposeSharesPrice at filingReturnValue
2025-09-19BUYMarket 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.
other1.7M¥3,185+21.5%¥198M ($1.3M)
2025-09-19BUYMarket 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.
other841.5K¥3,185+21.5%¥371M ($2.4M)
2025-09-19SELLMarket Buy
三井住友信託銀行株式会社
Sumitomo Mitsui Trust Bank,Limited
strategic1.6M¥3,185-21.5%¥322M ($2.1M)
2023-03-22SELLnegotiated
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.
other1.7M¥2,198-76.1%¥143M ($924K)
2023-03-22BUYnegotiated
日興アセットマネジメント株式会社
Nikko Asset Management Co.,Ltd.
other757.4K¥2,198+76.1%¥1.7B ($10.7M)
2023-03-22BUYnegotiated
三井住友信託銀行株式会社
Sumitomo Mitsui Trust Bank,Limited
strategic1.8M¥2,198+76.1%¥3.9B ($25.4M)
2023-01-19BUYMarket 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.
other1.7M¥1,919+101.7%¥313M ($2.0M)
2023-01-19BUYMarket Buy
三井住友信託銀行株式会社
Sumitomo Mitsui Trust Bank,Limited
strategic1.8M¥1,919+101.7%¥266M ($1.7M)
2023-01-19SELLMarket Buy
日興アセットマネジメント株式会社
Nikko Asset Management Co.,Ltd.
other755.5K¥1,919-101.7%¥391M ($2.5M)

Frequently asked questions

Who has been buying The Sumitomo Warehouse Co., Ltd. stock?
3 distinct investors have filed 4 disclosed large-shareholding filings in The Sumitomo Warehouse Co., Ltd. (9303), most recently on 2025-09-19. 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 The Sumitomo Warehouse Co., Ltd. have?
The Sumitomo Warehouse Co., Ltd. has 4 buy-side and 3 sell-side disclosures on record, covering ¥511M ($3.3M) in total reported value, spanning 2023-01-19 to 2025-09-19.
Where does StockDrifts get The Sumitomo Warehouse 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 The Sumitomo Warehouse Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.