Who has been buying Lacto Japan Co., Ltd. stock?

20 distinct investors have filed 45 disclosed large-shareholding filings in Lacto Japan Co., Ltd. (3139), most recently on 2026-02-20. 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 Lacto Japan Co., Ltd. have?

Lacto Japan Co., Ltd. has 45 buy-side and 28 sell-side disclosures on record, covering ¥8.9B ($57.2M) in total reported value, spanning 2021-05-11 to 2026-02-20.

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.

Lacto Japan Co., Ltd. 3139

Company

株式会社ラクト・ジャパンLacto Japan Co., Ltd.

Investors

Buys

Total Value

¥8.9B ($57.2M)

Avg Return

+49.04%

Last Filing

2026-02-20

Lacto Japan Co., Ltd. (3139) has 45 disclosed large-shareholding filings and 28 disclosed disposals on record, filed by 20 distinct investors. Together those filings cover ¥8.9B ($57.2M) in reported transaction value. The earliest filing StockDrifts holds for Lacto Japan Co., Ltd. is dated 2021-05-11; the most recent is 2026-02-20. Across these filings the average return since disclosure is +49.04%, 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
2026-08-20	SELL	Market Buy	SBIアセットマネジメント株式会社	passive	311.3K	¥3,425	-1.6%	¥341M ($2.2M)
2026-08-20	SELL	Market Buy	レオス・キャピタルワークス株式会社	passive	40.0K	¥3,425	-1.6%	¥34M ($222K)
2026-08-20	SELL	unknown	株式会社SBI証券	other	42.6K	¥3,425	-1.6%	¥17M ($111K)
2026-02-20	BUY	Market Buy	SBIアセットマネジメント株式会社	passive	410.2K	¥3,665	-5.0%	¥1.5B ($9.7M)
2026-02-20	BUY	Market Buy	レオス・キャピタルワークス株式会社	passive	50.0K	¥3,665	-5.0%	¥183M ($1.2M)
2026-02-20	BUY	Market Buy	株式会社SBI証券	other	47.1K	¥3,665	-5.0%	¥173M ($1.1M)
2023-12-22	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	97.7K	¥1,927	-80.6%	¥374M ($2.4M)
2023-12-22	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	116.0K	¥1,927	-	-
2023-12-22	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	132.2K	¥1,927	-	-
2023-12-07	SELL	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	291.6K	¥1,904	-82.8%	¥135M ($868K)
2023-12-07	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	116.0K	¥1,904	-	-
2023-12-07	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	132.5K	¥1,904	-82.8%	¥91M ($587K)
2023-10-06	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	179.8K	¥2,044	+70.3%	¥368M ($2.4M)
2023-10-06	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	361.8K	¥2,044	+70.3%	¥740M ($4.8M)
2023-10-06	BUY	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	116.0K	¥2,044	+70.3%	¥237M ($1.5M)
2023-07-21	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	1.0K	¥1,960	+77.5%	¥127M ($816K)
2023-07-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	396.4K	¥1,960	+77.5%	¥768M ($5.0M)
2023-07-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-7.5K	¥1,960	-76.0%	¥10M ($63K)
2023-06-06	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	34.5K	¥1,960	-	¥68M ($437K)
2023-06-06	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	466.8K	¥1,960	+77.5%	¥903M ($5.8M)
2023-06-06	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	-2.6K	¥1,960	-76.0%	¥91M ($590K)
2023-04-20	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	43.6K	¥2,040	+70.6%	¥69M ($444K)
2023-04-20	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	561.9K	¥2,040	+70.6%	¥1.1B ($7.3M)
2023-03-22	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	7.2K	¥1,948	+78.6%	¥1.2B ($7.5M)
2023-03-22	SELL	Market Buy	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	10.0K	¥1,948	-78.6%	¥66M ($424K)
2023-03-22	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	685.2K	¥1,948	+78.6%	¥1.3B ($8.5M)
2022-10-20	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	4.1K	¥2,135	+63.0%	¥716M ($4.6M)
2022-10-20	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	299.2K	¥2,135	-63.0%	¥106M ($682K)
2022-10-20	BUY	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	104.2K	¥2,135	+63.0%	¥13M ($82K)
2022-09-06	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	724	¥2,291	+51.9%	¥227M ($1.5M)
2022-09-06	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	43.2K	¥2,291	+51.9%	¥18M ($117K)
2022-09-06	BUY	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	776.9K	¥2,291	+51.9%	¥1.8B ($11.4M)
2022-06-21	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	-200	¥2,034	-69.6%	¥805M ($5.2M)
2022-06-21	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	35.2K	¥2,034	-71.1%	¥20M ($130K)
2022-06-21	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	889.1K	¥2,034	+71.1%	¥4M ($26K)
2022-06-20	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	116.0K	¥2,026	-	-
2022-06-20	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	153.4K	¥2,026	-71.8%	¥2M ($13K)
2022-06-20	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	67.4K	¥2,026	+71.8%	¥8M ($52K)
2022-06-20	SELL	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	11.2K	¥2,026	-71.8%	¥24M ($155K)
2022-06-20	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	11.2K	¥2,026	-71.8%	¥285M ($1.8M)
2022-06-06	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	116.0K	¥2,064	+68.6%	¥239M ($1.5M)
2022-06-06	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	154.3K	¥2,064	+68.6%	¥318M ($2.1M)
2022-06-06	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	63.2K	¥2,064	+68.6%	¥130M ($842K)
2022-06-06	BUY	negotiated	auカブコム証券株式会社 Mitsubishi UFJ Financial Group Inc.	other	22.4K	¥2,064	+68.6%	¥46M ($298K)
2022-06-06	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	151.8K	¥2,064	+68.6%	¥313M ($2.0M)
2022-05-19	BUY	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	4.1K	¥2,030	+71.4%	¥804M ($5.2M)
2022-05-19	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	45.2K	¥2,030	+71.4%	¥46M ($298K)
2022-05-19	SELL	Market Buy	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	887.2K	¥2,030	-71.4%	¥28M ($182K)
2022-04-22	BUY	unknown	株式会社みずほ銀行 Mizuho Bank, Ltd.	strategic	116.0K	¥2,020	-	-
2022-04-22	BUY	unknown	みずほ証券株式会社 Mizuho Securities Co., Ltd.	other	193.0K	¥2,020	+72.3%	¥4M ($26K)

Showing the 50 most recent of 90 filings.

Frequently asked questions

Who has been buying Lacto Japan Co., Ltd. stock?: 20 distinct investors have filed 45 disclosed large-shareholding filings in Lacto Japan Co., Ltd. (3139), most recently on 2026-02-20. 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 Lacto Japan Co., Ltd. have?: Lacto Japan Co., Ltd. has 45 buy-side and 28 sell-side disclosures on record, covering ¥8.9B ($57.2M) in total reported value, spanning 2021-05-11 to 2026-02-20.
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.