Who has been buying Runsystem Co.,Ltd. stock?

13 distinct investors have filed 12 disclosed large-shareholding filings in Runsystem Co.,Ltd. (3326), most recently on 2026-02-16. 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 Runsystem Co.,Ltd. have?

Runsystem Co.,Ltd. has 12 buy-side and 38 sell-side disclosures on record, covering ¥597M ($3.9M) in total reported value, spanning 2021-06-14 to 2026-02-16.

Where does StockDrifts get Runsystem Co.,Ltd. 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.

Runsystem Co.,Ltd. 3326

Company

株式会社ランシステムRunsystem Co.,Ltd.

Investors

Buys

Total Value

¥597M ($3.9M)

Avg Return

+50.56%

Last Filing

2026-02-16

Runsystem Co.,Ltd. (3326) has 12 disclosed large-shareholding filings and 38 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥597M ($3.9M) in reported transaction value. The earliest filing StockDrifts holds for Runsystem Co.,Ltd. is dated 2021-06-14; the most recent is 2026-02-16. 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 +50.56%, 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
2026-06-02	BUY	unknown	日高大輔	unknown	113.2K	¥600	+0.2%	¥68M ($438K)
2026-06-02	BUY	unknown	濱田友則	unknown	200	¥600	+0.2%	¥120K ($774)
2026-06-02	BUY	unknown	三井寿哲	unknown	1.4K	¥600	+0.2%	¥840K ($5K)
2026-06-02	BUY	unknown	平川正一	unknown	28.6K	¥600	+0.2%	¥17M ($111K)
2026-06-02	BUY	unknown	平川正一	unknown	28.6K	¥600	+0.2%	¥17M ($111K)
2026-06-02	BUY	unknown	西原貴志	unknown	9.4K	¥600	+0.2%	¥6M ($36K)
2026-06-02	BUY	unknown	西原貴志	unknown	9.4K	¥600	+0.2%	¥6M ($36K)
2026-06-02	BUY	unknown	西原弘子	unknown	3.5K	¥600	+0.2%	¥2M ($14K)
2026-06-02	BUY	unknown	西原光男	unknown	10.9K	¥600	+0.2%	¥7M ($42K)
2026-06-02	SELL	unknown	プラザ商事株式会社	strategic	13.0K	¥600	-0.2%	¥18M ($115K)
2026-06-02	SELL	unknown	GAUDI株式会社	strategic	5.5K	¥600	-0.2%	¥11M ($68K)
2026-06-02	BUY	unknown	日高大輔	unknown	113.2K	¥600	+0.2%	¥68M ($438K)
2026-06-02	BUY	unknown	濱田友則	unknown	200	¥600	+0.2%	¥120K ($774)
2026-06-02	BUY	unknown	三井寿哲	unknown	1.4K	¥600	+0.2%	¥840K ($5K)
2026-06-02	BUY	unknown	西原弘子	unknown	3.5K	¥600	+0.2%	¥2M ($14K)
2026-06-02	BUY	unknown	西原光男	unknown	10.9K	¥600	+0.2%	¥7M ($42K)
2026-06-02	SELL	unknown	プラザ商事株式会社	strategic	13.0K	¥600	-0.2%	¥18M ($115K)
2026-06-02	SELL	unknown	GAUDI株式会社	strategic	5.5K	¥600	-0.2%	¥11M ($68K)
2026-02-16	BUY	unknown	日高大輔	unknown	113.2K	¥779	+9.8%	¥80M ($513K)
2026-02-16	BUY	unknown	濱田友則	unknown	200	¥779	+9.8%	¥141K ($907)
2026-02-16	BUY	unknown	三井寿哲	unknown	1.4K	¥779	+9.8%	¥984K ($6K)
2026-02-16	BUY	unknown	平川正一	unknown	28.6K	¥779	+9.8%	¥20M ($130K)
2026-02-16	BUY	unknown	西原弘子	unknown	3.5K	¥779	+9.8%	¥2M ($16K)
2026-02-16	BUY	unknown	西原光男	unknown	10.9K	¥779	+9.8%	¥8M ($49K)
2026-02-16	SELL	unknown	西原貴志	strategic	9.4K	¥779	+9.8%	¥7M ($43K)
2026-02-16	SELL	unknown	プラザ商事株式会社	strategic	42.8K	¥779	+9.8%	¥30M ($194K)
2026-02-16	SELL	unknown	GAUDI株式会社	strategic	23.1K	¥779	+9.8%	¥16M ($105K)
2026-01-23	BUY	unknown	日高大輔	unknown	113.2K	¥803	+12.5%	¥80M ($513K)
2026-01-23	BUY	unknown	西原弘子	unknown	3.5K	¥803	+12.5%	¥2M ($16K)
2026-01-23	BUY	unknown	濱田友則	unknown	200	¥803	+12.5%	¥141K ($907)
2026-01-23	BUY	unknown	三井寿哲	unknown	1.4K	¥803	+12.5%	¥984K ($6K)
2026-01-23	BUY	unknown	平川正一	unknown	28.6K	¥803	+12.5%	¥20M ($130K)
2026-01-23	BUY	unknown	大鐘産業株式会社	unknown	0	¥803	+12.5%	-
2026-01-23	SELL	unknown	西原貴志	strategic	11.1K	¥803	+12.5%	¥8M ($50K)
2026-01-23	SELL	unknown	西原光男	strategic	10.9K	¥803	+12.5%	¥8M ($49K)
2026-01-23	SELL	unknown	プラザ商事株式会社	strategic	74.9K	¥803	+12.5%	¥53M ($340K)
2026-01-23	SELL	unknown	GAUDI株式会社	strategic	34.3K	¥803	+12.5%	¥24M ($156K)
2026-01-08	BUY	unknown	日高大輔	unknown	113.2K	¥828	+15.1%	¥80M ($513K)
2026-01-08	BUY	unknown	濱田友則	unknown	200	¥828	+15.1%	¥141K ($907)
2026-01-08	BUY	unknown	三井寿哲	unknown	1.4K	¥828	+15.1%	¥984K ($6K)
2026-01-08	BUY	unknown	平川正一	unknown	28.6K	¥828	+15.1%	¥20M ($130K)
2026-01-08	BUY	unknown	西原貴志	unknown	12.9K	¥828	+15.1%	¥9M ($59K)
2026-01-08	BUY	unknown	西原弘子	unknown	3.5K	¥828	+15.1%	¥2M ($16K)
2026-01-08	BUY	unknown	西原光男	unknown	13.4K	¥828	+15.1%	¥9M ($61K)
2026-01-08	SELL	unknown	大鐘産業株式会社	strategic	0	¥828	+15.1%	-
2026-01-08	SELL	unknown	プラザ商事株式会社	strategic	105.6K	¥828	+15.1%	¥74M ($479K)
2026-01-08	SELL	unknown	GAUDI株式会社	strategic	43.3K	¥828	+15.1%	¥30M ($196K)
2025-12-08	BUY	unknown	日高大輔	unknown	113.2K	¥625	-12.5%	¥80M ($513K)
2025-12-08	BUY	unknown	濱田友則	unknown	200	¥625	-12.5%	¥141K ($907)
2025-12-08	BUY	unknown	三井寿哲	unknown	1.4K	¥625	-12.5%	¥984K ($6K)

Showing the 50 most recent of 171 filings.

Frequently asked questions

Who has been buying Runsystem Co.,Ltd. stock?: 13 distinct investors have filed 12 disclosed large-shareholding filings in Runsystem Co.,Ltd. (3326), most recently on 2026-02-16. 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 Runsystem Co.,Ltd. have?: Runsystem Co.,Ltd. has 12 buy-side and 38 sell-side disclosures on record, covering ¥597M ($3.9M) in total reported value, spanning 2021-06-14 to 2026-02-16.
Where does StockDrifts get Runsystem Co.,Ltd. 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 Runsystem Co.,Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.