Who has been buying Sumitomo Forestry Co., Ltd. stock?

14 distinct investors have filed 38 disclosed large-shareholding filings in Sumitomo Forestry Co., Ltd. (1911), most recently on 2026-03-05. 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 Forestry Co., Ltd. have?

Sumitomo Forestry Co., Ltd. has 38 buy-side and 39 sell-side disclosures on record, covering ¥68.9B ($444.6M) in total reported value, spanning 2021-05-07 to 2026-03-05.

Where does StockDrifts get Sumitomo Forestry 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.

Sumitomo Forestry Co., Ltd. 1911

Company

住友林業株式会社Sumitomo Forestry Co., Ltd.

Investors

Buys

Total Value

¥68.9B ($444.6M)

Avg Return

+59.07%

Last Filing

2026-03-05

Sumitomo Forestry Co., Ltd. (1911) has 38 disclosed large-shareholding filings and 39 disclosed disposals on record, filed by 14 distinct investors. Together those filings cover ¥68.9B ($444.6M) in reported transaction value. The earliest filing StockDrifts holds for Sumitomo Forestry Co., Ltd. is dated 2021-05-07; the most recent is 2026-03-05. 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 +59.07%, 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
2026-08-06	BUY	Market Buy	アモーヴァ・アセットマネジメント株式会社	other	17.1M	¥1,353	-0.4%	¥4.4B ($28.6M)
2026-08-06	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	13.3M	¥1,353	+0.4%	¥335M ($2.2M)
2026-08-06	SELL	negotiated	三井住友信託銀行株式会社	strategic	4.5M	¥1,353	+0.4%	¥1.8B ($11.9M)
2026-07-22	BUY	Market Buy	野村アセットマネジメント株式会社	other	36.0M	¥1,327	+1.6%	¥5.8B ($37.6M)
2026-07-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	361.7K	¥1,327	-1.6%	¥2.6B ($16.9M)
2026-07-22	BUY	Market Buy	野村證券株式会社	other	2.5M	¥1,327	+1.6%	¥3.4B ($21.7M)
2026-06-19	BUY	Market Buy	野村アセットマネジメント株式会社	other	31.6M	¥1,338	+2.1%	¥1.6B ($10.1M)
2026-06-19	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	2.3M	¥1,338	+2.1%	¥1.1B ($6.9M)
2026-06-19	BUY	unknown	野村證券株式会社	other	-4.3K	¥1,338	-	-
2026-03-05	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.6M	¥1,529.5	-4.4%	¥2.3B ($14.8M)
2026-03-05	BUY	unknown	野村アセットマネジメント株式会社	other	30.5M	¥1,529.5	-4.4%	¥44.5B ($287.1M)
2026-02-05	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	33.2M	¥1,765	+17.2%	¥109M ($704K)
2025-12-19	SELL	negotiated	アモーヴァ・アセットマネジメント株式会社	other	13.7M	¥1,585	+7.8%	¥20.0B ($128.9M)
2025-12-19	SELL	negotiated	三井住友トラスト・アセットマネジメント株式会社	other	13.8M	¥1,585	+7.8%	¥20.1B ($129.9M)
2025-12-19	BUY	negotiated	三井住友信託銀行株式会社	strategic	5.8M	¥1,585	+7.8%	¥8.5B ($55.2M)
2025-09-19	SELL	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	14.2M	¥1,758	+16.9%	¥544M ($3.5M)
2025-09-19	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	16.3M	¥1,758	-16.9%	¥2.5B ($16.1M)
2025-09-19	BUY	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	5.8M	¥1,758	-16.9%	¥10.3B ($66.4M)
2025-07-04	BUY	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	14.5M	¥1,435	+1.9%	¥178M ($1.1M)
2025-07-04	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	14.9M	¥1,435	+1.9%	¥3.1B ($20.0M)
2025-07-04	SELL	Market Buy	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	5.8M	¥1,435	-1.9%	¥1.9B ($12.0M)
2025-06-19	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	4.8M	¥1,445	-1.1%	¥209M ($1.3M)
2025-06-19	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	4.2M	¥1,445	-1.1%	¥149M ($961K)
2025-06-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.4M	¥1,445	+1.1%	¥3.5B ($22.4M)
2025-03-07	SELL	unknown	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	1.6M	¥1,583	+7.7%	¥750M ($4.8M)
2025-03-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	2.5M	¥1,583	-7.7%	¥4.0B ($25.8M)
2025-03-07	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	2.3M	¥1,583	+7.7%	¥5.6B ($36.4M)
2025-02-07	BUY	unknown	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	2.1M	¥1,728.33	-15.4%	¥3.6B ($23.3M)
2025-02-07	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	5.8M	¥1,728.33	-15.4%	¥10.1B ($65.2M)
2025-02-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	2.5M	¥1,728.33	-15.4%	¥4.4B ($28.2M)
2024-09-20	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	4.9M	¥2,307	-36.6%	¥666M ($4.3M)
2024-09-20	BUY	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	4.3M	¥2,307	-36.6%	¥666M ($4.3M)
2024-09-20	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.4M	¥2,307	-36.6%	¥5.5B ($35.7M)
2024-07-19	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	4.6M	¥2,124.67	-31.2%	¥175M ($1.1M)
2024-07-19	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	4.1M	¥2,124.67	+31.2%	¥1.0B ($6.5M)
2024-07-19	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.4M	¥2,124.67	-31.2%	¥5.1B ($32.9M)
2023-12-06	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	4.6M	¥1,312.33	-11.4%	¥108M ($698K)
2023-12-06	BUY	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	4.5M	¥1,312.33	+11.4%	¥54M ($349K)
2023-12-06	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.4M	¥1,312.33	-11.4%	¥27M ($174K)
2023-09-22	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	4.6M	¥1,334	-9.6%	¥192M ($1.2M)
2023-09-22	BUY	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	4.5M	¥1,334	+9.6%	¥330M ($2.1M)
2023-09-22	SELL	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.4M	¥1,334	-9.6%	¥55M ($354K)
2023-07-06	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	4.7M	¥1,148.33	-27.3%	¥70M ($450K)
2023-07-06	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	4.2M	¥1,148.33	-27.3%	¥814M ($5.3M)
2023-07-06	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	2.4M	¥1,148.33	+27.3%	¥2.8B ($17.8M)
2023-04-17	SELL	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	1.0M	¥937.33	-55.9%	¥2.0B ($12.8M)
2023-04-17	BUY	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	267.2K	¥937.33	+55.9%	¥250M ($1.6M)
2023-04-17	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.4M	¥937.33	+55.9%	¥1.3B ($8.3M)
2023-04-17	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	4.9M	¥937.33	-55.9%	¥170M ($1.1M)
2023-04-17	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	938.7K	¥937.33	+55.9%	¥880M ($5.7M)

Showing the 50 most recent of 106 filings.

Frequently asked questions

Who has been buying Sumitomo Forestry Co., Ltd. stock?: 14 distinct investors have filed 38 disclosed large-shareholding filings in Sumitomo Forestry Co., Ltd. (1911), most recently on 2026-03-05. 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 Forestry Co., Ltd. have?: Sumitomo Forestry Co., Ltd. has 38 buy-side and 39 sell-side disclosures on record, covering ¥68.9B ($444.6M) in total reported value, spanning 2021-05-07 to 2026-03-05.
Where does StockDrifts get Sumitomo Forestry 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 Sumitomo Forestry Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.