Who has been buying Uluru.Co.,Ltd. stock?

12 distinct investors have filed 27 disclosed large-shareholding filings in Uluru.Co.,Ltd. (3979), most recently on 2026-03-09. 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 Uluru.Co.,Ltd. have?

Uluru.Co.,Ltd. has 27 buy-side and 22 sell-side disclosures on record, covering ¥869M ($5.6M) in total reported value, spanning 2021-03-22 to 2026-03-09.

Where does StockDrifts get Uluru.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.

Uluru.Co.,Ltd. 3979

Company

株式会社うるるUluru.Co.,Ltd.

Investors

Buys

Total Value

¥869M ($5.6M)

Avg Return

-14.77%

Last Filing

2026-03-09

Uluru.Co.,Ltd. (3979) has 27 disclosed large-shareholding filings and 22 disclosed disposals on record, filed by 12 distinct investors. Together those filings cover ¥869M ($5.6M) in reported transaction value. The earliest filing StockDrifts holds for Uluru.Co.,Ltd. is dated 2021-03-22; the most recent is 2026-03-09. 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 -14.77%, 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
2026-03-09	BUY	Market Buy	株式会社UH5	passive	2.1M	¥373	+8.6%	¥708M ($4.6M)
2026-03-09	BUY	Market Buy	光通信株式会社	passive	2.1M	¥373	+8.6%	¥716M ($4.6M)
2026-03-09	BUY	Market Buy	株式会社エスアイエル	passive	1.8M	¥373	+8.6%	¥602M ($3.9M)
2026-03-09	BUY	Market Buy	株式会社UH Partners 3	passive	2.1M	¥373	+8.6%	¥722M ($4.7M)
2026-03-09	BUY	Market Buy	株式会社UH Partners 2	passive	761.9K	¥373	-8.6%	¥260M ($1.7M)
2025-09-26	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	518.9K	¥435	-21.6%	¥226M ($1.5M)
2025-09-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	441.3K	¥435	-21.6%	¥192M ($1.2M)
2025-09-26	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	529.2K	¥435	-21.6%	¥230M ($1.5M)
2025-09-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	120.8K	¥435	-21.6%	¥21M ($138K)
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥435	-21.6%	¥228M ($1.5M)
2025-08-05	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	518.9K	¥389.5	-12.4%	¥202M ($1.3M)
2025-08-05	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	441.3K	¥389.5	-12.4%	¥1M ($9K)
2025-08-05	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	529.2K	¥389.5	-12.4%	¥206M ($1.3M)
2025-08-05	SELL	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	71.5K	¥389.5	+12.4%	¥215M ($1.4M)
2025-08-05	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥389.5	-12.4%	¥204M ($1.3M)
2025-03-17	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	518.9K	¥421.75	-19.1%	¥219M ($1.4M)
2025-03-17	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	437.4K	¥421.75	-19.1%	¥6M ($36K)
2025-03-17	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	529.2K	¥421.75	-19.1%	¥223M ($1.4M)
2025-03-17	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	6.1K	¥421.75	-19.1%	¥41M ($268K)
2025-03-17	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥421.75	-19.1%	¥221M ($1.4M)
2025-02-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥401	-15.0%	¥211M ($1.4M)
2025-02-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	525.0K	¥401	-15.0%	¥211M ($1.4M)
2025-02-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	424.7K	¥401	-15.0%	¥28M ($179K)
2025-02-26	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	529.2K	¥401	-15.0%	¥212M ($1.4M)
2024-12-27	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	355.4K	¥374.75	-9.0%	¥66M ($424K)
2024-12-27	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	529.2K	¥374.75	-9.0%	¥198M ($1.3M)
2024-12-27	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥374.75	-9.0%	¥197M ($1.3M)
2024-12-27	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	525.0K	¥374.75	-9.0%	¥197M ($1.3M)
2024-12-19	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	179.8K	¥350	-2.6%	¥24M ($158K)
2024-12-19	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	529.2K	¥350	-2.6%	¥185M ($1.2M)
2024-12-19	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	525.0K	¥350	-2.6%	¥184M ($1.2M)
2024-12-19	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥350	-2.6%	¥184M ($1.2M)
2024-09-30	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	110.1K	¥285	+19.6%	¥31M ($202K)
2024-09-30	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	529.2K	¥285	+19.6%	¥26M ($169K)
2024-09-30	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	525.0K	¥285	+19.6%	¥150M ($965K)
2024-09-30	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥285	+19.6%	¥150M ($965K)
2024-08-27	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	110.1K	¥318.5	+7.1%	¥35M ($226K)
2024-08-27	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	437.3K	¥318.5	+7.1%	¥22M ($142K)
2024-08-27	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	525.0K	¥318.5	+7.1%	¥167M ($1.1M)
2024-08-27	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥318.5	+7.1%	¥167M ($1.1M)
2024-07-04	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	110.1K	¥375.75	-9.3%	¥41M ($267K)
2024-07-04	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	367.4K	¥375.75	-9.3%	¥26M ($170K)
2024-07-04	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	525.0K	¥375.75	-9.3%	¥197M ($1.3M)
2024-07-04	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥375.75	-9.3%	¥197M ($1.3M)
2024-05-22	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	110.1K	¥403.75	-15.5%	¥44M ($287K)
2024-05-22	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	297.5K	¥403.75	-15.5%	¥28M ($182K)
2024-05-22	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	525.0K	¥403.75	-15.5%	¥212M ($1.4M)
2024-05-22	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥403.75	-15.5%	¥212M ($1.4M)
2024-05-09	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	525.0K	¥392.25	-13.1%	¥206M ($1.3M)
2024-05-09	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	110.1K	¥392.25	-13.1%	¥43M ($279K)

Showing the 50 most recent of 117 filings.

Frequently asked questions

Who has been buying Uluru.Co.,Ltd. stock?: 12 distinct investors have filed 27 disclosed large-shareholding filings in Uluru.Co.,Ltd. (3979), most recently on 2026-03-09. 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 Uluru.Co.,Ltd. have?: Uluru.Co.,Ltd. has 27 buy-side and 22 sell-side disclosures on record, covering ¥869M ($5.6M) in total reported value, spanning 2021-03-22 to 2026-03-09.
Where does StockDrifts get Uluru.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 Uluru.Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.