Who has been buying Nippon Insure Co., Ltd. stock?

8 distinct investors have filed 11 disclosed large-shareholding filings in Nippon Insure Co., Ltd. (5843), most recently on 2025-05-21. 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 Nippon Insure Co., Ltd. have?

Nippon Insure Co., Ltd. has 11 buy-side and 3 sell-side disclosures on record, covering ¥442M ($2.9M) in total reported value, spanning 2023-10-11 to 2025-05-21.

Where does StockDrifts get Nippon Insure 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.

Nippon Insure Co., Ltd. 5843

Company

ニッポンインシュア株式会社Nippon Insure Co., Ltd.

Investors

Buys

Total Value

¥442M ($2.9M)

Avg Return

+207.06%

Last Filing

2025-05-21

Nippon Insure Co., Ltd. (5843) has 11 disclosed large-shareholding filings and 3 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥442M ($2.9M) in reported transaction value. The earliest filing StockDrifts holds for Nippon Insure Co., Ltd. is dated 2023-10-11; the most recent is 2025-05-21. 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 +207.06%, 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
2026-06-19	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	144.3K	¥2,208	+6.8%	¥319M ($2.1M)
2025-05-21	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	103.9K	¥1,852	-26.5%	¥68M ($441K)
2024-11-19	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	140.7K	¥1,095	+113.9%	¥154M ($994K)
2024-03-26	BUY	Market Buy	豊島不動産株式会社 Toshima Real Estate Limited Company	passive	276.0K	¥906	+158.5%	¥62M ($397K)
2023-11-22	SELL	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.6K	¥731	-220.4%	¥327M ($2.1M)
2023-11-22	SELL	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	unknown	0	¥731	-220.4%	¥166M ($1.1M)
2023-11-08	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	5.9K	¥720	+225.3%	¥4M ($27K)
2023-11-08	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	215.7K	¥720	+225.3%	¥155M ($1.0M)
2023-11-01	BUY	Market Buy	豊島不動産株式会社 Toshima Real Estate Limited Company	passive	165.0K	¥710	+229.9%	¥21M ($138K)
2023-11-01	BUY	Market Buy	豊島不動産株式会社 Toshima Real Estate Limited Company	passive	197.5K	¥710	+229.9%	¥23M ($148K)
2023-11-01	BUY	Market Buy	豊島不動産株式会社 Toshima Real Estate Limited Company	passive	165.0K	¥710	+229.9%	¥21M ($138K)
2023-11-01	BUY	Market Buy	豊島不動産株式会社 Toshima Real Estate Limited Company	passive	197.5K	¥710	+229.9%	¥23M ($148K)
2023-10-31	BUY	Market Buy	豊島不動産株式会社 Toshima Real Estate Limited Company	passive	135.0K	¥708	+230.8%	¥95M ($616K)
2023-10-31	BUY	Market Buy	豊島不動産株式会社 Toshima Real Estate Limited Company	passive	197.5K	¥708	+230.8%	¥140M ($902K)
2023-10-11	BUY	unknown	株式会社Mサポート M Support Co., Ltd.	strategic	300.0K	¥741	+216.1%	¥222M ($1.4M)
2023-10-11	BUY	unknown	株式会社サンコー管理 Sanko Management Co., Ltd.	strategic	300.0K	¥741	+216.1%	¥222M ($1.4M)
2023-10-11	BUY	unknown	三好京子 Kyoko Miyoshi	strategic	110.0K	¥741	+216.1%	¥82M ($526K)
2023-10-11	BUY	unknown	三好修 MIYOSHI OSAMU	strategic	150.0K	¥741	+216.1%	¥111M ($717K)

Frequently asked questions

Who has been buying Nippon Insure Co., Ltd. stock?: 8 distinct investors have filed 11 disclosed large-shareholding filings in Nippon Insure Co., Ltd. (5843), most recently on 2025-05-21. 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 Nippon Insure Co., Ltd. have?: Nippon Insure Co., Ltd. has 11 buy-side and 3 sell-side disclosures on record, covering ¥442M ($2.9M) in total reported value, spanning 2023-10-11 to 2025-05-21.
Where does StockDrifts get Nippon Insure 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 Nippon Insure Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.