Who has been buying General Oyster, Inc. stock?

7 distinct investors have filed 7 disclosed large-shareholding filings in General Oyster, Inc. (3224), most recently on 2026-04-01. 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 General Oyster, Inc. have?

General Oyster, Inc. has 7 buy-side and 17 sell-side disclosures on record, covering ¥1.2B ($7.5M) in total reported value, spanning 2021-03-22 to 2026-04-01.

Where does StockDrifts get General Oyster, 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.

General Oyster, Inc. 3224

Company

株式会社ゼネラル・オイスターGeneral Oyster, Inc.

Investors

Buys

Total Value

¥1.2B ($7.5M)

Avg Return

-1.87%

Last Filing

2026-04-01

General Oyster, Inc. (3224) has 7 disclosed large-shareholding filings and 17 disclosed disposals on record, filed by 7 distinct investors. Together those filings cover ¥1.2B ($7.5M) in reported transaction value. The earliest filing StockDrifts holds for General Oyster, Inc. is dated 2021-03-22; the most recent is 2026-04-01. 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 -1.87%, 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
2026-04-01	SELL	unknown	有限会社ティーズ・キャピタル	strategic	25.0K	¥753	-1.9%	¥49M ($318K)
2026-04-01	SELL	unknown	小林敏雄	strategic	220.1K	¥753	-1.9%	¥617M ($4.0M)
2026-03-26	SELL	subscription	株式会社ソレイユNC	passive	67.8K	¥796	+2.3%	¥53M ($340K)
2026-03-26	BUY	subscription	株式会社ネクスタ	passive	3.5M	¥796	+2.3%	¥2.7B ($17.5M)
2025-11-19	SELL	Market Buy	株式会社ソレイユNC Soleil NC Co., Ltd.	passive	67.8K	¥628	-23.9%	¥965K ($6K)
2025-11-19	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	3.5M	¥628	+23.9%	¥335M ($2.2M)
2025-10-31	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	1.2M	¥570	+36.5%	¥678M ($4.4M)
2025-10-31	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	1.2M	¥570	+36.5%	¥678M ($4.4M)
2025-08-26	SELL	Market Buy	株式会社ソレイユNC Soleil NC Co., Ltd.	passive	67.8K	¥696	-11.8%	¥1M ($9K)
2025-08-26	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	2.3M	¥696	+11.8%	¥1.6B ($10.3M)
2025-08-20	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	2.3M	¥683	+13.9%	¥1.6B ($10.1M)
2025-08-20	SELL	Market Buy	株式会社ソレイユNC Soleil NC Co., Ltd.	passive	67.8K	¥683	-13.9%	¥1M ($6K)
2025-03-07	SELL	Market Buy	株式会社ソレイユNC Soleil NC Co., Ltd.	passive	67.8K	¥901	+13.7%	¥1.3B ($8.2M)
2025-03-07	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	2.3M	¥901	-13.7%	¥2.1B ($13.3M)
2025-01-31	BUY	Market Buy	株式会社ソレイユNC Soleil NC Co., Ltd.	passive	15.0K	¥805	-3.4%	¥12M ($78K)
2025-01-31	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	2.3M	¥805	-3.4%	¥10M ($64K)
2024-12-09	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	2.3M	¥637	+22.1%	¥370M ($2.4M)
2024-05-13	SELL	Market Buy	兼子修一 Shuichi Kaneko	passive	0	¥1,721	+54.8%	¥138M ($890K)
2024-05-13	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	1.3M	¥1,721	-54.8%	¥138M ($890K)
2023-12-08	BUY	Market Buy	兼子修一 Shuichi Kaneko	passive	80.0K	¥1,699	-54.2%	¥136M ($877K)
2023-12-08	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	1.2M	¥1,699	-54.2%	¥2.0B ($13.0M)
2023-11-09	SELL	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	1.2M	¥1,750	+55.5%	¥16M ($100K)
2022-02-04	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	1.2M	¥991	-21.5%	¥1.2B ($7.6M)
2022-01-28	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	1.2M	¥990	-21.4%	¥251M ($1.6M)
2021-12-01	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	739.0K	¥930	-16.3%	¥687M ($4.4M)
2021-06-04	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	157.7K	¥891	+12.7%	¥30M ($194K)
2021-05-25	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	192.8K	¥906	+14.1%	¥23M ($146K)
2021-05-10	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	218.7K	¥946	+17.8%	¥32M ($206K)
2021-04-22	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	254.4K	¥1,006	+22.7%	¥6M ($38K)
2021-04-16	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	260.7K	¥1,029	+24.4%	¥37M ($241K)
2021-03-31	BUY	Market Buy	株式会社ネクスタ NEXTA Co.,Ltd.	passive	739.0K	¥926.554	-16.0%	¥685M ($4.4M)
2021-03-30	SELL	Market Buy	株式会社TRYFUNDS INVESTMENT TRYFUNDS INVESTMENT Inc.	passive	0	¥934.465	+16.7%	¥1.1B ($7.2M)
2021-03-29	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	299.8K	¥980.941	+20.7%	¥34M ($220K)
2021-03-22	SELL	Market Buy	マイルストーン・キャピタル・マネジメント株式会社 Milestone Capital Management,Ltd.	passive	337.5K	¥1,018.517	+23.6%	¥33M ($211K)

Frequently asked questions

Who has been buying General Oyster, Inc. stock?: 7 distinct investors have filed 7 disclosed large-shareholding filings in General Oyster, Inc. (3224), most recently on 2026-04-01. 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 General Oyster, Inc. have?: General Oyster, Inc. has 7 buy-side and 17 sell-side disclosures on record, covering ¥1.2B ($7.5M) in total reported value, spanning 2021-03-22 to 2026-04-01.
Where does StockDrifts get General Oyster, 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 General Oyster, Inc.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.