Who has been buying Ihara Science Corporation stock?

8 distinct investors have filed 18 disclosed large-shareholding filings in Ihara Science Corporation (5999), most recently on 2023-03-31. 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 Ihara Science Corporation have?

Ihara Science Corporation has 18 buy-side and 7 sell-side disclosures on record, covering ¥31.6B ($203.7M) in total reported value, spanning 2021-06-22 to 2023-03-31.

Where does StockDrifts get Ihara Science Corporation 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.

Ihara Science Corporation 5999

Company

イハラサイエンス株式会社Ihara Science Corporation

Investors

Buys

Total Value

¥31.6B ($203.7M)

Avg Return

+30.90%

Last Filing

2023-03-31

Ihara Science Corporation (5999) has 18 disclosed large-shareholding filings and 7 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥31.6B ($203.7M) in reported transaction value. The earliest filing StockDrifts holds for Ihara Science Corporation is dated 2021-06-22; the most recent is 2023-03-31. 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 +30.90%, 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
2023-03-31	SELL	unknown	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー Michael 1925 LLC	activist	0	¥2,972.18	-0.1%	¥1.2B ($7.7M)
2023-03-31	SELL	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	0	¥2,972.18	-0.1%	¥3.0B ($19.2M)
2023-03-29	BUY	subscription	エン・アイ・ム株式会社 EN AI MU CORPORATION	activist	9.7M	¥2,973.18	+0.1%	¥28.7B ($185.5M)
2023-03-29	BUY	subscription	中野琢雄 Takuo Nakano	activist	40.1K	¥2,973.18	+0.1%	¥119M ($768K)
2023-03-29	BUY	subscription	エン・アイ・ム株式会社 EN AI MU CORPORATION	activist	9.7M	¥2,973.18	+0.1%	¥28.7B ($185.5M)
2023-03-27	BUY	subscription	中野琢雄 Takuo Nakano	activist	40.1K	¥2,971.18	+0.2%	¥119M ($768K)
2023-03-27	BUY	subscription	エン・アイ・ム株式会社 EN AI MU CORPORATION	activist	9.7M	¥2,971.18	+0.2%	¥28.7B ($185.3M)
2023-03-27	BUY	subscription	エン・アイ・ム株式会社 EN AI MU CORPORATION	activist	9.7M	¥2,971.18	+0.2%	¥28.7B ($185.3M)
2023-03-23	SELL	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	0	¥2,971.18	-0.2%	¥3.9B ($25.0M)
2023-03-13	BUY	Market Buy	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー Michael 1925 LLC	activist	400.0K	¥2,972.18	+0.1%	¥58M ($376K)
2023-03-13	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	1.0M	¥2,972.18	+0.1%	¥8M ($54K)
2023-01-11	BUY	Market Buy	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー Michael 1925 LLC	activist	380.7K	¥2,263.14	+31.5%	¥276M ($1.8M)
2023-01-11	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	996.7K	¥2,263.14	+31.5%	¥44M ($286K)
2022-09-28	BUY	Market Buy	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー Michael 1925 LLC	passive	258.3K	¥2,214.13	+34.4%	¥236M ($1.5M)
2022-09-28	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	976.9K	¥2,214.13	+34.4%	¥81M ($520K)
2022-06-01	BUY	Market Buy	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー Michael 1925 LLC	passive	152.7K	¥2,106.13	+41.3%	¥162M ($1.0M)
2022-06-01	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	940.9K	¥2,106.13	+41.3%	¥136M ($875K)
2022-04-06	BUY	unknown	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー Michael 1925 LLC	passive	74.9K	¥2,024.12	+47.0%	¥85M ($548K)
2022-04-06	BUY	Market Buy	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー Michael 1925 LLC	passive	74.9K	¥2,024.12	+47.0%	¥85M ($548K)
2022-04-06	BUY	Market Buy	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	876.7K	¥2,024.12	+47.0%	¥218M ($1.4M)
2022-04-06	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	876.7K	¥2,024.12	+47.0%	¥218M ($1.4M)
2022-03-15	BUY	unknown	マイケル・ワン・サウザンド・ナイン・ハンドレッド・トゥエンティ・ファイブ・エルエルシー Michael 1925 LLC	passive	33.0K	¥1,966.12	+51.4%	¥65M ($419K)
2022-03-15	BUY	unknown	ニッポン・アクティブ・バリュー・ファンド NIPPON ACTIVE VALUE FUND PLC	activist	768.4K	¥1,966.12	+51.4%	¥1.5B ($9.7M)
2022-03-07	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	230.0K	¥1,901.12	+56.5%	¥437M ($2.8M)
2022-03-07	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	353.5K	¥1,901.12	-56.5%	¥333M ($2.1M)
2022-03-01	SELL	Market Buy	ひびき・パース・アドバイザーズ(Hibiki Path Advisors Pte. Ltd.) Hibiki Path Advisors Pte. Ltd.	activist	386.3K	¥2,066.13	-44.0%	¥752M ($4.9M)
2022-01-11	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	230.0K	¥2,580.16	+15.3%	¥593M ($3.8M)
2022-01-11	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	528.9K	¥2,580.16	-15.3%	¥397M ($2.6M)
2021-10-07	BUY	Market Buy	ひびき・パース・アドバイザーズ(Hibiki Path Advisors Pte. Ltd.) Hibiki Path Advisors Pte. Ltd.	activist	749.9K	¥1,981.12	+50.2%	¥97M ($626K)
2021-06-22	BUY	Market Buy	株式会社三井住友銀行 Sumitomo Mitsui Banking Corporation	other	230.0K	¥1,838.11	+61.9%	¥423M ($2.7M)
2021-06-22	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	683.1K	¥1,838.11	-61.9%	¥262M ($1.7M)

Frequently asked questions

Who has been buying Ihara Science Corporation stock?: 8 distinct investors have filed 18 disclosed large-shareholding filings in Ihara Science Corporation (5999), most recently on 2023-03-31. 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 Ihara Science Corporation have?: Ihara Science Corporation has 18 buy-side and 7 sell-side disclosures on record, covering ¥31.6B ($203.7M) in total reported value, spanning 2021-06-22 to 2023-03-31.
Where does StockDrifts get Ihara Science Corporation 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 Ihara Science Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.