Who has been buying Basis Corporation stock?

3 distinct investors have filed 7 disclosed large-shareholding filings in Basis Corporation (4068), most recently on 2025-12-19. 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 Basis Corporation have?

Basis Corporation has 7 buy-side and 21 sell-side disclosures on record, covering ¥11.1B ($71.5M) in total reported value, spanning 2021-07-01 to 2025-12-19.

Where does StockDrifts get Basis 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.

Basis Corporation 4068

Company

ベイシス株式会社Basis Corporation

Investors

Buys

Total Value

¥11.1B ($71.5M)

Avg Return

-41.26%

Last Filing

2025-12-19

Basis Corporation (4068) has 7 disclosed large-shareholding filings and 21 disclosed disposals on record, filed by 3 distinct investors. Together those filings cover ¥11.1B ($71.5M) in reported transaction value. The earliest filing StockDrifts holds for Basis Corporation is dated 2021-07-01; the most recent is 2025-12-19. 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 -41.26%, 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
2026-07-08	BUY	negotiated	吉村公孝	activist	325.7K	¥1,611	+3.4%	¥525M ($3.4M)
2026-07-08	SELL	unknown	ワイズマネージメント株式会社	activist	851.0K	¥1,611	-3.4%	¥32M ($206K)
2025-12-19	SELL	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	unknown	0	¥1,812	-1.5%	¥185M ($1.2M)
2025-12-05	SELL	negotiated	ワイズマネージメント株式会社	activist	870.7K	¥1,809	-1.7%	¥1.6B ($10.3M)
2025-12-05	BUY	negotiated	吉村公孝	activist	325.7K	¥1,809	+1.7%	¥599M ($3.9M)
2025-09-03	SELL	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥1,969	+6.6%	¥23M ($146K)
2025-09-03	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	324.5K	¥1,969	+6.6%	¥9M ($55K)
2024-12-02	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	324.5K	¥1,192	-54.3%	¥23M ($150K)
2024-12-02	SELL	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥1,192	-54.3%	¥444K ($3K)
2024-08-07	BUY	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥1,080	+70.3%	¥945M ($6.1M)
2024-08-07	BUY	negotiated	吉村公孝 Kimitaka Yoshimura	activist	343.9K	¥1,080	+70.3%	¥371M ($2.4M)
2023-12-01	SELL	Market Buy	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥1,500	-22.6%	¥559K ($4K)
2023-12-01	BUY	Market Buy	吉村公孝 Kimitaka Yoshimura	activist	343.9K	¥1,500	+22.6%	¥559K ($4K)
2023-11-02	SELL	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥1,746	-5.3%	¥4M ($25K)
2023-11-02	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	343.6K	¥1,746	-5.3%	¥33M ($214K)
2023-08-25	BUY	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥1,673	+9.9%	¥1.5B ($9.4M)
2023-08-25	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	361.6K	¥1,673	-9.9%	¥23M ($150K)
2023-03-06	SELL	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	other	100.0K	¥2,371	+22.4%	¥362M ($2.3M)
2023-03-06	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	375.5K	¥2,371	+22.4%	¥8M ($54K)
2023-03-06	BUY	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥2,371	-22.4%	¥2.1B ($13.4M)
2023-02-27	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	378.9K	¥2,358	+22.0%	¥43M ($277K)
2023-02-27	BUY	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥2,358	-22.0%	¥2.1B ($13.3M)
2022-12-13	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	397.1K	¥2,295	+19.9%	¥45M ($289K)
2022-12-13	SELL	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥2,295	+19.9%	¥23M ($148K)
2022-03-30	BUY	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	other	250.0K	¥3,460	-46.9%	¥865M ($5.6M)
2022-03-28	SELL	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥2,874	+36.0%	¥16M ($102K)
2022-03-28	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	412.0K	¥2,874	+36.0%	¥7M ($48K)
2022-02-08	SELL	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥3,560	+48.3%	¥6M ($38K)
2022-02-08	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	412.0K	¥3,560	+48.3%	¥3M ($21K)
2021-11-22	SELL	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥7,060	+74.0%	¥221M ($1.4M)
2021-11-22	SELL	negotiated	吉村公孝 Kimitaka Yoshimura	activist	412.0K	¥7,060	+74.0%	¥103M ($664K)
2021-07-01	BUY	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥5,500	-66.6%	¥4.8B ($31.0M)
2021-07-01	BUY	negotiated	ワイズマネージメント株式会社 Wise Management Co., Ltd.	activist	875.0K	¥5,500	-66.6%	¥4.8B ($31.0M)
2021-07-01	BUY	negotiated	吉村公孝 Kimitaka Yoshimura	activist	412.0K	¥5,500	-66.6%	¥2.3B ($14.6M)
2021-07-01	BUY	negotiated	吉村公孝 Kimitaka Yoshimura	activist	412.0K	¥5,500	-66.6%	¥2.3B ($14.6M)

Frequently asked questions

Who has been buying Basis Corporation stock?: 3 distinct investors have filed 7 disclosed large-shareholding filings in Basis Corporation (4068), most recently on 2025-12-19. 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 Basis Corporation have?: Basis Corporation has 7 buy-side and 21 sell-side disclosures on record, covering ¥11.1B ($71.5M) in total reported value, spanning 2021-07-01 to 2025-12-19.
Where does StockDrifts get Basis 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 Basis Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.