Who has been buying Tsumura & Co. stock?

15 distinct investors have filed 20 disclosed large-shareholding filings in Tsumura & Co. (4540), most recently on 2025-11-20. 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 Tsumura & Co. have?

Tsumura & Co. has 20 buy-side and 15 sell-side disclosures on record, covering ¥143.2B ($924.0M) in total reported value, spanning 2021-06-18 to 2025-11-20.

Where does StockDrifts get Tsumura & Co. 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.

Tsumura & Co. 4540

Company

株式会社ツムラTsumura & Co.

Investors

Buys

Total Value

¥143.2B ($924.0M)

Avg Return

+4.53%

Last Filing

2025-11-20

Tsumura & Co. (4540) has 20 disclosed large-shareholding filings and 15 disclosed disposals on record, filed by 15 distinct investors. Together those filings cover ¥143.2B ($924.0M) in reported transaction value. The earliest filing StockDrifts holds for Tsumura & Co. is dated 2021-06-18; the most recent is 2025-11-20. 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 +4.53%, 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
2025-11-20	SELL	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	3.8M	¥3,785	+1.0%	¥2.9B ($18.7M)
2025-11-20	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	286.0K	¥3,785	-1.0%	¥1.1B ($7.0M)
2025-07-22	BUY	Market Buy	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	6.7M	¥3,607	+3.9%	¥3.6B ($23.4M)
2025-07-07	BUY	Market Buy	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	5.7M	¥3,513	+6.6%	¥243M ($1.6M)
2025-03-17	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	89.4K	¥4,459	+16.0%	¥137M ($883K)
2025-03-17	SELL	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	522.0K	¥4,459	+16.0%	¥205M ($1.3M)
2025-03-17	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	1.7M	¥4,459	+16.0%	¥2.2B ($13.9M)
2025-03-17	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.2M	¥4,459	+16.0%	¥2.9B ($19.0M)
2025-01-09	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	4.6M	¥4,710	-20.5%	¥36M ($233K)
2024-12-18	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	4.6M	¥4,792	-21.8%	¥2.7B ($17.3M)
2024-12-18	SELL	Market Buy	野村證券株式会社 Nomura Securities Co.,Ltd.	other	15.6K	¥4,792	+21.8%	¥55.2B ($356.0M)
2024-10-04	BUY	unknown	野村アセットマネジメント株式会社 Nomura Asset Management Co., Ltd.	other	4.0M	¥4,886	-23.3%	¥19.5B ($126.1M)
2024-10-04	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	129.3K	¥4,886	-23.3%	¥632M ($4.1M)
2024-08-21	SELL	unknown	インベスコホンコンリミテッド Invesco Hong Kong Limited	other	98.7K	¥3,913	+4.3%	¥240M ($1.6M)
2024-08-21	BUY	unknown	インベスコ・アセット・マネジメント株式会社 Invesco Asset Management (Japan) Limited	other	3.4M	¥3,913	-4.3%	¥13.1B ($84.2M)
2024-07-29	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	121.5K	¥3,948	-5.1%	¥480M ($3.1M)
2024-07-29	BUY	negotiated	三菱UFJアセットマネジメント株式会社 Mitsubishi UFJ Financial Group Inc.	passive	571.7K	¥3,948	-5.1%	¥515M ($3.3M)
2024-07-29	BUY	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.9M	¥3,948	-5.1%	¥61M ($391K)
2024-07-29	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	2.2M	¥3,948	-5.1%	¥8.7B ($56.0M)
2024-05-21	BUY	unknown	インベスコホンコンリミテッド Invesco Hong Kong Limited	other	163.3K	¥3,929	-4.7%	¥642M ($4.1M)
2024-05-21	BUY	unknown	インベスコ・アセット・マネジメント株式会社 Invesco Asset Management (Japan) Limited	other	4.2M	¥3,929	-4.7%	¥16.2B ($104.6M)
2024-04-19	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	2.5M	¥3,777	-0.8%	¥870M ($5.6M)
2024-04-19	SELL	Market Buy	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	938.8K	¥3,777	+0.8%	¥3.3B ($21.3M)
2024-04-04	BUY	unknown	インベスコホンコンリミテッド Invesco Hong Kong Limited	other	164.4K	¥3,867	-3.1%	¥636M ($4.1M)
2024-04-04	BUY	Market Buy	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	5.6M	¥3,867	-3.1%	¥3.6B ($23.4M)
2024-04-04	BUY	unknown	インベスコ・アセット・マネジメント株式会社 Invesco Asset Management (Japan) Limited	other	5.8M	¥3,867	-3.1%	¥22.3B ($143.9M)
2024-02-14	SELL	unknown	インベスコホンコンリミテッド Invesco Hong Kong Limited	other	164.8K	¥2,766.5	-35.4%	¥21M ($137K)
2024-02-14	BUY	unknown	インベスコ・アセット・マネジメント株式会社 Invesco Asset Management (Japan) Limited	other	6.7M	¥2,766.5	+35.4%	¥18.4B ($118.7M)
2023-12-13	SELL	unknown	インベスコホンコンリミテッド Invesco Hong Kong Limited	other	165.1K	¥2,645.5	-41.6%	¥61M ($393K)
2023-12-13	SELL	unknown	インベスコホンコンリミテッド Invesco Hong Kong Limited	other	165.1K	¥2,645.5	-41.6%	¥61M ($393K)
2023-12-13	BUY	unknown	インベスコ・アセット・マネジメント株式会社 Invesco Asset Management (Japan) Limited	other	7.5M	¥2,645.5	+41.6%	¥19.7B ($126.8M)
2023-12-13	BUY	unknown	インベスコ・アセット・マネジメント株式会社 Invesco Asset Management (Japan) Limited	other	7.5M	¥2,645.5	+41.6%	¥19.7B ($126.8M)
2023-10-17	BUY	private	ピンアン・ライフ・インシュアランス・カンパニー・オブ・チャイナ・リミテッド(中国平安人寿保険股フン有限公司)(Ping An Life Insurance Company of China, Ltd.) Ping An Life Insurance Company of China, Ltd.	passive	7.7M	¥2,601	+44.0%	¥20.0B ($128.8M)
2023-10-03	BUY	unknown	インベスコキャピタルマネジメントエルエルシー Invesco Capital Management LLC	other	30.1K	¥2,731.5	+37.1%	¥8.0B ($51.7M)
2023-10-03	SELL	unknown	インベスコホンコンリミテッド Invesco Hong Kong Limited	other	193.2K	¥2,731.5	-37.1%	¥63M ($406K)
2023-10-03	BUY	unknown	インベスコ・アセット・マネジメント株式会社 Invesco Asset Management (Japan) Limited	other	8.6M	¥2,731.5	+37.1%	¥23.1B ($149.2M)
2023-08-04	SELL	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.8M	¥2,587.5	-44.8%	¥1.7B ($10.9M)
2023-08-04	SELL	unknown	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	2.3M	¥2,587.5	-44.8%	¥397M ($2.6M)
2021-09-03	SELL	unknown	ネスナ・エルエルピー(Nesna LLP) Nesna LLP	unknown	0	¥3,880	+3.5%	¥18.4B ($118.9M)
2021-09-03	BUY	unknown	マラソン・アセット・マネジメント・リミテッド(Marathon Asset Management Limited) Marathon Asset Management Limited	other	4.7M	¥3,880	-3.5%	¥18.1B ($116.7M)
2021-06-18	BUY	Market Buy	マラソン・アセット・マネジメント・エルエルピー(Marathon Asset Management LLP) Marathon Asset Management LLP	other	4.8M	¥3,535	+6.0%	¥2.9B ($18.9M)

Frequently asked questions

Who has been buying Tsumura & Co. stock?: 15 distinct investors have filed 20 disclosed large-shareholding filings in Tsumura & Co. (4540), most recently on 2025-11-20. 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 Tsumura & Co. have?: Tsumura & Co. has 20 buy-side and 15 sell-side disclosures on record, covering ¥143.2B ($924.0M) in total reported value, spanning 2021-06-18 to 2025-11-20.
Where does StockDrifts get Tsumura & Co. 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 Tsumura & Co.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.