Who has been buying Koito Manufacturing Co., Ltd. stock?

13 distinct investors have filed 10 disclosed large-shareholding filings in Koito Manufacturing Co., Ltd. (7276), most recently on 2025-11-05. 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 Koito Manufacturing Co., Ltd. have?

Koito Manufacturing Co., Ltd. has 10 buy-side and 13 sell-side disclosures on record, covering ¥101.4B ($654.1M) in total reported value, spanning 2022-02-04 to 2025-11-05.

Where does StockDrifts get Koito Manufacturing 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.

Koito Manufacturing Co., Ltd. 7276

Company

株式会社小糸製作所Koito Manufacturing Co., Ltd.

Investors

Buys

Total Value

¥101.4B ($654.1M)

Avg Return

+11.26%

Last Filing

2025-11-05

Koito Manufacturing Co., Ltd. (7276) has 10 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥101.4B ($654.1M) in reported transaction value. The earliest filing StockDrifts holds for Koito Manufacturing Co., Ltd. is dated 2022-02-04; the most recent is 2025-11-05. 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 +11.26%, 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
2025-11-05	SELL	negotiated	トヨタ自動車株式会社 TOYOTA MOTOR CORPORATION	strategic	55.2M	¥2,280	-12.8%	¥14.6B ($94.2M)
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	4.1M	¥2,026.5	+26.9%	¥873M ($5.6M)
2025-02-07	BUY	unknown	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	132.4K	¥2,026.5	+26.9%	¥20.0B ($128.8M)
2025-02-07	SELL	unknown	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	9.3M	¥2,026.5	-26.9%	¥2.3B ($14.9M)
2024-07-05	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	10.5M	¥2,276	+13.0%	¥23.8B ($153.4M)
2024-07-05	BUY	Market Buy	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	3.7M	¥2,276	+13.0%	¥8.4B ($54.4M)
2024-07-05	BUY	Market Buy	SMBC日興証券株式会社 SMBC Nikko Securities Inc.	other	2.5M	¥2,276	+13.0%	¥5.6B ($36.2M)
2024-03-25	SELL	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	10.5M	¥1,985	-29.5%	¥4.3B ($28.0M)
2024-03-25	SELL	Market Buy	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	3.0M	¥1,985	-29.5%	¥2.1B ($13.4M)
2024-02-19	BUY	negotiated	ファースト・センティア・インベスターズ(香港)リミテッドLimited) First Sentier Investors (Hong Kong	passive	447.2K	¥1,923.932	+31.9%	¥860M ($5.6M)
2024-02-19	BUY	negotiated	ファースト・センティア・インベスターズ(香港)リミテッドLimited) First Sentier Investors (Hong Kong	passive	447.2K	¥1,923.932	+31.9%	¥860M ($5.6M)
2024-02-19	SELL	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	7.7M	¥1,962.5	-31.0%	¥4.2B ($27.3M)
2024-02-19	BUY	negotiated	ファースト・センティア・インベスターズ(香港)リミテッドLimited) First Sentier Investors (Hong Kong	passive	447.2K	¥1,923.932	+31.9%	¥860M ($5.6M)
2024-02-19	BUY	negotiated	ファースト・センティア・インベスターズ(香港)リミテッドLimited) First Sentier Investors (Hong Kong	passive	447.2K	¥1,962.5	+31.0%	¥878M ($5.7M)
2024-02-19	BUY	negotiated	ファースト・センティア・インベスターズ(香港)リミテッドLimited) First Sentier Investors (Hong Kong	passive	447.2K	¥1,962.5	+31.0%	¥878M ($5.7M)
2024-02-19	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	1.6M	¥1,962.5	-31.0%	¥181M ($1.2M)
2024-02-19	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	4.9M	¥1,962.5	-31.0%	¥1.1B ($7.4M)
2023-12-07	SELL	Market Buy	MFSインベストメント・マネジメント株式会社 MFS Investment Management K.K.	passive	422.7K	¥2,244	-14.6%	¥69M ($446K)
2023-12-07	BUY	Market Buy	マサチューセッツ・ファイナンシャル・サービセズ・カンパニー Massachusetts Financial Services Company	passive	12.7M	¥2,244	+14.6%	¥28.2B ($181.6M)
2023-10-20	SELL	Market Buy	MFSインベストメント・マネジメント株式会社 MFS Investment Management K.K.	passive	488.8K	¥2,219.5	-15.8%	¥642M ($4.1M)
2023-10-20	BUY	Market Buy	マサチューセッツ・ファイナンシャル・サービセズ・カンパニー Massachusetts Financial Services Company	passive	17.5M	¥2,219.5	+15.8%	¥38.4B ($247.5M)
2023-07-18	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	81.5K	¥2,542	+1.1%	¥23.1B ($149.3M)
2023-07-18	BUY	negotiated	三菱UFJ国際投信株式会社 Mitsubishi UFJ Financial Group Inc.	passive	1.8M	¥2,542	+1.1%	¥1.9B ($12.1M)
2023-07-18	SELL	negotiated	三菱UFJ信託銀行株式会社 Mitsubishi UFJ Financial Group Inc.	passive	5.7M	¥2,542	-1.1%	¥8.3B ($53.3M)
2023-07-18	BUY	negotiated	株式会社三菱UFJ銀行 Mitsubishi UFJ Financial Group Inc.	strategic	10.3M	¥2,542	+1.1%	¥26.2B ($169.1M)
2022-09-22	SELL	negotiated	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	1.6M	¥2,227.5	-15.4%	¥1.0B ($6.5M)
2022-09-22	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	3.9M	¥2,227.5	-15.4%	¥1.2B ($7.6M)
2022-09-22	BUY	negotiated	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	strategic	1.5M	¥2,227.5	+15.4%	¥3.4B ($21.8M)
2022-02-04	SELL	Market Buy	MFSインベストメント・マネジメント株式会社 MFS Investment Management K.K.	passive	392.5K	¥2,945	+12.7%	¥95M ($611K)
2022-02-04	BUY	Market Buy	マサチューセッツ・ファイナンシャル・サービセズ・カンパニー Massachusetts Financial Services Company	passive	12.1M	¥2,945	-12.7%	¥5.3B ($33.9M)

Frequently asked questions

Who has been buying Koito Manufacturing Co., Ltd. stock?: 13 distinct investors have filed 10 disclosed large-shareholding filings in Koito Manufacturing Co., Ltd. (7276), most recently on 2025-11-05. 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 Koito Manufacturing Co., Ltd. have?: Koito Manufacturing Co., Ltd. has 10 buy-side and 13 sell-side disclosures on record, covering ¥101.4B ($654.1M) in total reported value, spanning 2022-02-04 to 2025-11-05.
Where does StockDrifts get Koito Manufacturing 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 Koito Manufacturing Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.