Who has been buying O'will Corporation stock?

7 distinct investors have filed 8 disclosed large-shareholding filings in O'will Corporation (3143), most recently on 2025-10-21. 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 O'will Corporation have?

O'will Corporation has 8 buy-side and 5 sell-side disclosures on record, covering ¥469M ($3.0M) in total reported value, spanning 2021-07-09 to 2025-10-21.

Where does StockDrifts get O'will 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.

O'will Corporation 3143

Company

オーウイル株式会社O'will Corporation

Investors

Buys

Total Value

¥469M ($3.0M)

Avg Return

+17.43%

Last Filing

2025-10-21

O'will Corporation (3143) has 8 disclosed large-shareholding filings and 5 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥469M ($3.0M) in reported transaction value. The earliest filing StockDrifts holds for O'will Corporation is dated 2021-07-09; the most recent is 2025-10-21. 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 +17.43%, 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
2025-10-21	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	583.4K	¥726	+1.1%	¥424M ($2.7M)
2025-10-07	SELL	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	50	¥719	-2.1%	¥406M ($2.6M)
2025-09-26	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	193.9K	¥763.33	-3.8%	¥148M ($955K)
2025-09-25	BUY	Market Buy	株式会社サンワ電化阿久比 Sanwadenkaagui Corp.	passive	194.0K	¥763.33	-3.8%	¥24M ($155K)
2025-09-25	BUY	Market Buy	株式会社サンワ電化阿久比 Sanwadenkaagui Corp.	passive	194.0K	¥763.33	-3.8%	¥24M ($155K)
2025-09-25	BUY	Market Buy	株式会社サンワ電化阿久比 Sanwadenkaagui Corp.	passive	194.0K	¥763.33	-3.8%	¥24M ($155K)
2025-09-22	BUY	Market Buy	株式会社サンワ電化阿久比 Sanwadenkaagui Corp.	passive	194.0K	¥762.67	-3.8%	¥24M ($155K)
2025-07-22	BUY	unknown	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	188.3K	¥601.33	+22.1%	¥113M ($731K)
2025-07-11	BUY	Market Buy	株式会社サンワ電化阿久比 Sanwadenkaagui Corp.	passive	162.5K	¥587.33	+25.0%	¥95M ($616K)
2025-07-01	BUY	Market Buy	株式会社サンワ電化阿久比 Sanwadenkaagui Corp.	passive	157.5K	¥580.67	+26.4%	¥91M ($590K)
2025-07-01	BUY	Market Buy	株式会社サンワ電化阿久比 Sanwadenkaagui Corp.	passive	157.5K	¥580.67	+26.4%	¥91M ($590K)
2025-04-14	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	193.9K	¥592	+24.0%	¥21M ($137K)
2024-04-23	BUY	Market Buy	光通信株式会社 Hikari Tsushin K.K.	passive	158.1K	¥494.33	+48.5%	¥78M ($504K)
2023-11-16	SELL	negotiated	グリーンコア株式会社 GREEN CORE, LTD	strategic	250.0K	¥426.33	-72.2%	¥21M ($137K)
2023-11-15	BUY	unknown	小口八穗子 Yahoko Oguchi	unknown	36.5K	¥425.33	+72.6%	¥16M ($100K)
2023-11-15	BUY	unknown	小口八穗子 Yahoko Oguchi	activist	36.5K	¥425.33	+72.6%	¥16M ($100K)
2023-11-15	BUY	unknown	小口八穗子 Yahoko Oguchi	unknown	36.5K	¥425.33	+72.6%	¥16M ($100K)
2023-11-15	SELL	unknown	株式会社ビアンナ Bienna Corporation	strategic	310.0K	¥425.33	-72.6%	¥21M ($137K)
2023-11-15	BUY	unknown	小口英噐 Hideki Oguchi	activist	90.0K	¥425.33	+72.6%	¥38M ($247K)
2023-11-15	SELL	unknown	株式会社ビアンナ Bienna Corporation	strategic	310.0K	¥425.33	-72.6%	¥21M ($137K)
2023-11-14	BUY	unknown	小口八穗子 Yahoko Oguchi	unknown	36.5K	¥429.33	+71.0%	¥16M ($101K)
2023-11-14	BUY	unknown	株式会社ビアンナ Bienna Corporation	strategic	360.0K	¥429.33	+71.0%	¥155M ($997K)
2023-11-01	BUY	unknown	株式会社ビアンナ Bienna Corporation	unknown	360.0K	¥420	+74.8%	¥151M ($975K)
2023-11-01	BUY	unknown	小口八穗子 Yahoko Oguchi	activist	36.5K	¥420	+74.8%	¥15M ($99K)
2023-10-31	BUY	unknown	小口八穗子 Yahoko Oguchi	unknown	36.5K	¥434	+69.1%	¥16M ($102K)
2023-10-31	BUY	unknown	小口八穗子 Yahoko Oguchi	unknown	36.5K	¥434	+69.1%	¥16M ($102K)
2023-10-31	BUY	unknown	小口英噐 Hideki Oguchi	activist	90.0K	¥434	+69.1%	¥39M ($252K)
2023-10-31	BUY	unknown	小口英噐 Hideki Oguchi	activist	90.0K	¥434	+69.1%	¥39M ($252K)
2021-07-14	BUY	unknown	小口八穗子 Yahoko Oguchi	activist	36.5K	¥352.67	+108.1%	¥13M ($83K)
2021-07-14	BUY	unknown	小口英噐 Hideki Oguchi	activist	90.0K	¥352.67	+108.1%	¥32M ($205K)
2021-07-09	BUY	unknown	小口八穗子 Yahoko Oguchi	activist	36.5K	¥352.33	+108.3%	¥13M ($83K)
2021-07-09	BUY	unknown	小口八穗子 Yahoko Oguchi	activist	36.5K	¥352.33	+108.3%	¥13M ($83K)
2021-07-09	BUY	unknown	小口八穗子 Yahoko Oguchi	unknown	36.5K	¥352.33	+108.3%	¥13M ($83K)
2021-07-09	SELL	unknown	株式会社ビアンナ Bienna Corporation	strategic	360.0K	¥352.33	-108.3%	¥35M ($227K)
2021-07-09	BUY	unknown	小口英噐 Hideki Oguchi	activist	90.0K	¥352.33	+108.3%	¥32M ($205K)
2021-07-09	BUY	unknown	小口英噐 Hideki Oguchi	activist	90.0K	¥352.33	+108.3%	¥32M ($205K)

Frequently asked questions

Who has been buying O'will Corporation stock?: 7 distinct investors have filed 8 disclosed large-shareholding filings in O'will Corporation (3143), most recently on 2025-10-21. 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 O'will Corporation have?: O'will Corporation has 8 buy-side and 5 sell-side disclosures on record, covering ¥469M ($3.0M) in total reported value, spanning 2021-07-09 to 2025-10-21.
Where does StockDrifts get O'will 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 O'will Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.