Who has been buying Artnature Inc. stock?

8 distinct investors have filed 14 disclosed large-shareholding filings in Artnature Inc. (7823), most recently on 2026-03-10. 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 Artnature Inc. have?

Artnature Inc. has 14 buy-side and 1 sell-side disclosures on record, covering ¥2.6B ($17.0M) in total reported value, spanning 2021-08-25 to 2026-03-10.

Where does StockDrifts get Artnature Inc. 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.

Artnature Inc. 7823

Company

株式会社アートネイチャーArtnature Inc.

Investors

Buys

Total Value

¥2.6B ($17.0M)

Avg Return

+4.09%

Last Filing

2026-03-10

Artnature Inc. (7823) has 14 disclosed large-shareholding filings and 1 disclosed disposals on record, filed by 8 distinct investors. Together those filings cover ¥2.6B ($17.0M) in reported transaction value. The earliest filing StockDrifts holds for Artnature Inc. is dated 2021-08-25; the most recent is 2026-03-10. 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 +4.09%, 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
2026-07-23	SELL	unknown	エフエムアールインベストメントマネジメントユーケーリミテッド (FMR Investment Management (UK) Limited) FMR Investment Management (UK) Limited	other	1.6M	¥852	-0.2%	¥158M ($1.0M)
2026-06-08	BUY	unknown	エフエムアールエルエルシー(FMR LLC) FMR LLC	other	1.8M	¥819	+4.9%	¥315M ($2.0M)
2026-06-08	BUY	Market Buy	エフアイエーエムエルエルシー FIAM LLC	other	127.0K	¥819	+4.9%	¥31M ($200K)
2026-06-08	SELL	unknown	フィデリティマネジメントアンドリサーチカンパニーエルエルシー Fidelity Management & Research Company LLC	corporate	1.7M	¥819	-4.9%	¥256M ($1.7M)
2026-03-10	BUY	Market Buy	株式会社UH5	passive	117.7K	¥813	-0.1%	¥96M ($617K)
2026-03-10	BUY	Market Buy	株式会社エスアイエル	passive	164.0K	¥813	+0.1%	¥133M ($859K)
2026-03-10	BUY	Market Buy	株式会社UH Partners 3	passive	405.7K	¥813	-0.1%	¥329M ($2.1M)
2026-03-10	BUY	Market Buy	株式会社UH Partners 2	passive	2.5M	¥813	+0.1%	¥2.0B ($13.1M)
2026-03-10	BUY	Market Buy	光通信株式会社	passive	2.4M	¥813	+0.1%	¥2.0B ($12.8M)
2025-09-26	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	164.0K	¥819	-0.8%	¥134M ($867K)
2025-09-26	BUY	Market Buy	株式会社UH5 UH5 Co., Ltd.	passive	52.4K	¥819	-0.8%	¥4.2B ($27.3M)
2025-09-26	BUY	Market Buy	株式会社UH Partners 3 UH Partners 3 Co., Ltd.	passive	118.2K	¥819	-0.8%	¥96M ($618K)
2025-09-26	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.5M	¥819	-0.8%	¥127M ($818K)
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.4M	¥819	-0.8%	¥2.0B ($12.9M)
2025-07-15	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	164.0K	¥767	+5.9%	¥126M ($812K)
2025-07-15	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.3M	¥767	+5.9%	¥301M ($1.9M)
2025-07-15	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.4M	¥767	+5.9%	¥1.9B ($12.1M)
2025-05-12	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	164.0K	¥797	+1.9%	¥131M ($843K)
2025-05-12	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	2.0M	¥797	+1.9%	¥302M ($1.9M)
2025-05-12	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.4M	¥797	+1.9%	¥1.9B ($12.6M)
2025-02-27	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	164.0K	¥757	+7.3%	¥124M ($801K)
2025-02-27	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.6M	¥757	+7.3%	¥279M ($1.8M)
2025-02-27	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.4M	¥757	+7.3%	¥1.8B ($11.9M)
2024-05-16	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	164.0K	¥781	+4.0%	¥128M ($826K)
2024-05-16	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	1.2M	¥781	+4.0%	¥271M ($1.8M)
2024-05-16	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.4M	¥781	+4.0%	¥1.9B ($12.3M)
2024-02-09	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.4M	¥793	+2.4%	¥1.9B ($12.5M)
2024-02-09	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	164.0K	¥793	+2.4%	¥130M ($839K)
2024-02-09	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	860.1K	¥793	+2.4%	¥275M ($1.8M)
2023-10-03	BUY	Market Buy	五十嵐祥剛 IGARASHI YOSHIKATA	activist	6.5M	¥811	+0.1%	¥153M ($990K)
2023-10-03	BUY	Market Buy	有限会社アイ・コーポレーション I Corporation Ltd.	strategic	3.3M	¥811	+0.1%	¥2.7B ($17.3M)
2023-10-03	BUY	Market Buy	五十嵐愛子 Aiko Igarashi	activist	460.0K	¥811	+0.1%	¥373M ($2.4M)
2022-10-11	BUY	Market Buy	株式会社エスアイエル SIL Co., Ltd.	passive	164.0K	¥738	+10.0%	¥121M ($781K)
2022-10-11	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	511.4K	¥738	+10.0%	¥254M ($1.6M)
2022-10-11	SELL	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.4M	¥738	-10.0%	¥122M ($786K)
2021-12-15	BUY	Market Buy	株式会社UH Partners 2 UH Partners 2, Inc.	passive	167.3K	¥723	+12.3%	¥121M ($780K)
2021-12-15	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.6M	¥723	+12.3%	¥129M ($834K)
2021-08-25	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	2.4M	¥699	+16.2%	¥245M ($1.6M)

Frequently asked questions

Who has been buying Artnature Inc. stock?: 8 distinct investors have filed 14 disclosed large-shareholding filings in Artnature Inc. (7823), most recently on 2026-03-10. 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 Artnature Inc. have?: Artnature Inc. has 14 buy-side and 1 sell-side disclosures on record, covering ¥2.6B ($17.0M) in total reported value, spanning 2021-08-25 to 2026-03-10.
Where does StockDrifts get Artnature Inc. 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 Artnature Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.