Who has been buying Renascience Inc. stock?

5 distinct investors have filed 6 disclosed large-shareholding filings in Renascience Inc. (4889), most recently on 2026-04-02. 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 Renascience Inc. have?

Renascience Inc. has 6 buy-side and 12 sell-side disclosures on record, covering ¥6.6B ($42.9M) in total reported value, spanning 2021-09-29 to 2026-04-02.

Where does StockDrifts get Renascience 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.

Renascience Inc. 4889

Company

株式会社レナサイエンスRenascience Inc.

Investors

Buys

Total Value

¥6.6B ($42.9M)

Avg Return

+30.62%

Last Filing

2026-04-02

Renascience Inc. (4889) has 6 disclosed large-shareholding filings and 12 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥6.6B ($42.9M) in reported transaction value. The earliest filing StockDrifts holds for Renascience Inc. is dated 2021-09-29; the most recent is 2026-04-02. 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 +30.62%, 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
2026-05-26	BUY	Market Buy	ハイツ・キャピタル・マネジメント・インク(Heights Capital Management, Inc.) Heights Capital Management, Inc.	passive	1.2M	¥1,387	+16.1%	¥1.7B ($11.0M)
2026-05-15	BUY	Market Buy	ハイツ・キャピタル・マネジメント・インク(Heights Capital Management, Inc.) Heights Capital Management, Inc.	passive	1.2M	¥1,905	-10.1%	¥488M ($3.1M)
2026-04-02	BUY	subscription	ハイツ・キャピタル・マネジメント・インク(Heights Capital Management, Inc.) Heights Capital Management, Inc.	passive	955.7K	¥1,667	-28.1%	¥234M ($1.5M)
2026-03-12	BUY	subscription	ハイツ・キャピタル・マネジメント・インク(Heights Capital Management, Inc.) Heights Capital Management, Inc.	passive	784.5K	¥2,036	-32.2%	¥1.6B ($10.3M)
2025-12-19	SELL	unknown	宮田敏男 Toshio Miyata	strategic	2.7M	¥1,731	+20.3%	¥103M ($667K)
2025-06-16	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	584.0K	¥1,992	+30.7%	¥296M ($1.9M)
2025-02-03	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	732.8K	¥1,425	+3.2%	¥194M ($1.3M)
2025-01-22	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	867.8K	¥854	-61.6%	¥206M ($1.3M)
2025-01-21	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	1.1M	¥704	-96.0%	¥133M ($860K)
2024-12-20	BUY	unknown	宮田敏男 Toshio Miyata	strategic	2.7M	¥276	+400.0%	¥51M ($326K)
2024-12-20	SELL	unknown	宮田敏男 Toshio Miyata	strategic	2.7M	¥276	-400.0%	¥51M ($326K)
2024-09-20	SELL	unknown	宮田敏男 Toshio Miyata	strategic	2.9M	¥356	-287.6%	¥38M ($242K)
2024-09-20	BUY	unknown	宮田敏男 Miyata Toshio	strategic	2.9M	¥356	+287.6%	¥1.0B ($6.7M)
2023-06-30	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	1.3M	¥549	-151.4%	¥70M ($455K)
2023-06-28	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	1.4M	¥581	-137.5%	¥128M ($824K)
2021-12-02	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	1.6M	¥782	-76.5%	¥164M ($1.1M)
2021-10-27	BUY	unknown	宮田萌美 Megumi Miyata	strategic	1.1M	¥822	+67.9%	¥863M ($5.6M)
2021-10-27	BUY	unknown	宮田あや Aya Miyata	strategic	1.2M	¥822	+67.9%	¥986M ($6.4M)
2021-10-27	BUY	unknown	宮田敏男 Toshio Miyata	strategic	2.9M	¥822	+67.9%	¥2.4B ($15.5M)
2021-10-25	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	1.8M	¥878	-57.2%	¥353M ($2.3M)
2021-10-19	SELL	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	2.2M	¥1,046	-31.9%	¥151M ($977K)
2021-10-01	BUY	unknown	宮田萌美 Megumi Miyata	strategic	1.1M	¥886	+55.8%	¥930M ($6.0M)
2021-10-01	BUY	unknown	宮田あや Aya Miyata	strategic	1.2M	¥886	+55.8%	¥1.1B ($6.9M)
2021-10-01	BUY	unknown	宮田敏男 Toshio Miyata	strategic	2.9M	¥886	+55.8%	¥2.6B ($16.7M)
2021-10-01	BUY	unknown	宮田萌美 Megumi Miyata	strategic	1.1M	¥886	+55.8%	¥930M ($6.0M)
2021-10-01	BUY	unknown	宮田あや Aya Miyata	strategic	1.2M	¥886	+55.8%	¥1.1B ($6.9M)
2021-10-01	BUY	unknown	宮田敏男 Toshio Miyata	strategic	2.9M	¥886	+55.8%	¥2.6B ($16.7M)
2021-09-29	BUY	Market Buy	DCIパートナーズ株式会社 DCI Partners Co., Ltd.	passive	2.3M	¥781	+76.7%	¥1.8B ($11.8M)

Frequently asked questions

Who has been buying Renascience Inc. stock?: 5 distinct investors have filed 6 disclosed large-shareholding filings in Renascience Inc. (4889), most recently on 2026-04-02. 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 Renascience Inc. have?: Renascience Inc. has 6 buy-side and 12 sell-side disclosures on record, covering ¥6.6B ($42.9M) in total reported value, spanning 2021-09-29 to 2026-04-02.
Where does StockDrifts get Renascience 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 Renascience Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.