Who has been buying Striders Corporation stock?

5 distinct investors have filed 11 disclosed large-shareholding filings in Striders Corporation (9816), most recently on 2026-04-22. 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 Striders Corporation have?

Striders Corporation has 11 buy-side and 0 sell-side disclosures on record, covering ¥1.9B ($12.1M) in total reported value, spanning 2025-06-19 to 2026-04-22.

Where does StockDrifts get Striders 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.

Striders Corporation 9816

Company

株式会社ストライダーズStriders Corporation

Investors

Buys

Total Value

¥1.9B ($12.1M)

Avg Return

+12.94%

Last Filing

2026-04-22

Striders Corporation (9816) has 11 disclosed large-shareholding filings and 0 disclosed disposals on record, filed by 5 distinct investors. Together those filings cover ¥1.9B ($12.1M) in reported transaction value. The earliest filing StockDrifts holds for Striders Corporation is dated 2025-06-19; the most recent is 2026-04-22. 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 +12.94%, 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
2026-07-10	BUY	Market Buy	黄聖博	passive	98.1K	¥239	+2.1%	¥23M ($151K)
2026-07-10	BUY	Market Buy	成成株式会社	activist	758.3K	¥239	+2.1%	¥181M ($1.2M)
2026-07-10	BUY	Market Buy	黄聖博	passive	98.1K	¥239	+2.1%	¥23M ($151K)
2026-07-10	BUY	Market Buy	成成株式会社	passive	758.3K	¥239	+2.1%	¥181M ($1.2M)
2026-04-22	BUY	Market Buy	成成株式会社 SEISEI CO.,LTD.	activist	758.3K	¥325	-6.2%	¥33M ($216K)
2026-02-27	BUY	Market Buy	成成株式会社 SEISEI CO.,LTD.	activist	655.4K	¥324	+2.5%	¥55M ($353K)
2025-12-24	BUY	unknown	早川良太郎	other	544.1K	¥331	+0.3%	¥181M ($1.2M)
2025-12-24	BUY	unknown	合同会社HAYAKAWA 代表社員早川良太郎	other	1.5M	¥331	-0.3%	¥497M ($3.2M)
2025-12-24	BUY	Market Buy	早川良太郎	other	544.1K	¥331	+0.3%	¥181M ($1.2M)
2025-12-24	BUY	Market Buy	合同会社HAYAKAWA 代表社員早川良太郎	other	1.5M	¥331	-0.3%	¥497M ($3.2M)
2025-11-19	BUY	Market Buy	成成株式会社 SEISEI CO.,LTD.	activist	486.3K	¥267	+24.3%	¥130M ($838K)
2025-10-08	BUY	unknown	合同会社HAYAKAWA HAYAKAWA LLC	other	1.5M	¥276	+20.3%	¥413M ($2.7M)
2025-10-08	BUY	unknown	早川良太郎 Ryotaro Hayakawa	other	204.1K	¥276	+20.3%	¥56M ($363K)
2025-10-08	BUY	unknown	早川良太郎 Ryotaro Hayakawa	other	204.1K	¥276	+20.3%	¥56M ($363K)
2025-10-08	BUY	unknown	合同会社HAYAKAWA 代表社員早川良太郎 HAYAKAWA LLC representative employee Ryotaro Hayakawa	other	1.5M	¥276	+20.3%	¥413M ($2.7M)
2025-09-30	BUY	unknown	井上靖 YASUSHI INOUE	other	33.3K	¥276	+20.3%	¥458M ($3.0M)
2025-09-30	BUY	unknown	井上靖 YASUSHI INOUE	other	33.3K	¥276	+20.3%	¥458M ($3.0M)
2025-09-26	BUY	unknown	早川良太郎 Ryotaro Hayakawa	other	204.1K	¥281	+18.1%	¥57M ($370K)
2025-09-26	BUY	unknown	早川良太郎 Ryotaro Hayakawa	other	204.1K	¥281	+18.1%	¥57M ($370K)
2025-09-26	BUY	unknown	合同会社HAYAKAWA HAYAKAWA LLC	other	1.5M	¥281	+18.1%	¥420M ($2.7M)
2025-09-26	BUY	unknown	合同会社HAYAKAWA HAYAKAWA LLC	other	1.5M	¥281	+18.1%	¥420M ($2.7M)
2025-06-19	BUY	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	674.4K	¥268	+23.9%	¥181M ($1.2M)

Frequently asked questions

Who has been buying Striders Corporation stock?: 5 distinct investors have filed 11 disclosed large-shareholding filings in Striders Corporation (9816), most recently on 2026-04-22. 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 Striders Corporation have?: Striders Corporation has 11 buy-side and 0 sell-side disclosures on record, covering ¥1.9B ($12.1M) in total reported value, spanning 2025-06-19 to 2026-04-22.
Where does StockDrifts get Striders 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 Striders Corporation. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.