Who has been buying RS Technologies Co., Ltd. stock?

9 distinct investors have filed 10 disclosed large-shareholding filings in RS Technologies Co., Ltd. (3445), most recently on 2025-10-14. 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 RS Technologies Co., Ltd. have?

RS Technologies Co., Ltd. has 10 buy-side and 24 sell-side disclosures on record, covering ¥5.6B ($35.9M) in total reported value, spanning 2021-04-07 to 2025-10-14.

Where does StockDrifts get RS Technologies 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.

RS Technologies Co., Ltd. 3445

Company

株式会社RS TechnologiesRS Technologies Co., Ltd.

Investors

Buys

Total Value

¥5.6B ($35.9M)

Avg Return

+44.41%

Last Filing

2025-10-14

RS Technologies Co., Ltd. (3445) has 10 disclosed large-shareholding filings and 24 disclosed disposals on record, filed by 9 distinct investors. Together those filings cover ¥5.6B ($35.9M) in reported transaction value. The earliest filing StockDrifts holds for RS Technologies Co., Ltd. is dated 2021-04-07; the most recent is 2025-10-14. 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 +44.41%, 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
2025-10-14	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	9.5M	¥3,555	-28.0%	¥216M ($1.4M)
2025-10-14	BUY	negotiated	方永義 Nagayoshi Ho	activist	2.1M	¥3,555	+28.0%	¥85M ($546K)
2025-09-16	SELL	unknown	日本バリュー・インベスターズ株式会社 Nippon Value Investors KK	other	661.3K	¥3,890	-17.0%	¥2.8B ($18.3M)
2025-06-02	BUY	unknown	日本バリュー・インベスターズ株式会社 Nippon Value Investors KK	other	1.4M	¥2,932	+55.2%	¥4.1B ($26.3M)
2024-02-22	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	1.2M	¥2,713	-67.7%	¥1.8B ($11.5M)
2023-11-17	BUY	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	9.5M	¥2,433	+87.0%	¥23.2B ($149.4M)
2023-11-17	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	9.5M	¥2,433	-87.0%	¥83M ($538K)
2023-11-17	SELL	negotiated	方永義 Nagayoshi Ho	activist	2.1M	¥2,433	-87.0%	¥19M ($124K)
2023-11-17	BUY	negotiated	方永義 Nagayoshi Ho	activist	2.1M	¥2,433	+87.0%	¥5.1B ($33.1M)
2023-11-08	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	9.5M	¥2,480	-83.5%	¥85M ($548K)
2023-11-08	SELL	negotiated	方永義 Nagayoshi Ho	activist	2.1M	¥2,480	-83.5%	¥20M ($126K)
2023-11-02	SELL	unknown	ニュートン・インベストメント・マネジメント・ジャパン株式会社 Newton Investment Management Japan Ltd.	other	1.3M	¥2,451	-85.6%	¥840M ($5.4M)
2023-10-02	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	9.5M	¥2,897	-57.1%	¥99M ($640K)
2023-10-02	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	9.5M	¥2,897	-57.1%	¥99M ($640K)
2023-10-02	SELL	negotiated	方永義 Nagayoshi Ho	activist	2.1M	¥2,897	-57.1%	¥23M ($148K)
2023-10-02	SELL	negotiated	方永義 Nagayoshi Ho	activist	2.1M	¥2,897	-57.1%	¥23M ($148K)
2023-09-29	SELL	negotiated	方永義 Nagayoshi Ho	activist	2.1M	¥2,857	-59.3%	¥23M ($146K)
2023-09-29	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	9.5M	¥2,857	-59.3%	¥98M ($631K)
2023-02-07	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	1.9M	¥3,995	-13.9%	¥1.3B ($8.1M)
2023-01-06	SELL	unknown	BNYメロン・インベストメント・マネジメント・ジャパン株式会社 BNY Mellon Investment Management Japan Limited	other	838.6K	¥3,570	-27.4%	¥522M ($3.4M)
2022-12-28	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	4.8M	¥3,600	-26.4%	¥265M ($1.7M)
2022-12-28	BUY	negotiated	方永義 Nagayoshi Ho	activist	1.1M	¥3,600	+26.4%	¥3.8B ($24.5M)
2022-12-28	BUY	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	4.8M	¥3,600	+26.4%	¥17.1B ($110.6M)
2022-12-28	BUY	negotiated	方永義 Nagayoshi Ho	activist	1.1M	¥3,600	+26.4%	¥3.8B ($24.5M)
2022-12-19	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	unknown	4.8M	¥4,065	-11.9%	¥299M ($1.9M)
2022-12-19	BUY	negotiated	方永義 Nagayoshi Ho	activist	1.1M	¥4,065	+11.9%	¥4.3B ($27.6M)
2022-12-19	BUY	negotiated	方永義 Nagayoshi Ho	activist	1.1M	¥4,065	+11.9%	¥4.3B ($27.6M)
2022-12-14	BUY	negotiated	方永義 Nagayoshi Ho	activist	1.1M	¥4,240	+7.3%	¥4.5B ($28.8M)
2022-12-14	BUY	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	activist	4.8M	¥4,240	+7.3%	¥20.2B ($130.2M)
2022-11-22	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	1.1M	¥4,400	-3.4%	¥683M ($4.4M)
2022-04-22	BUY	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	activist	4.8M	¥2,980	+52.7%	¥14.2B ($91.5M)
2022-04-22	BUY	negotiated	方永義 Nagayoshi Ho	activist	1.1M	¥2,980	+52.7%	¥3.1B ($20.3M)
2022-04-06	BUY	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	activist	4.8M	¥3,065	+48.5%	¥14.6B ($94.1M)
2022-04-06	SELL	negotiated	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	activist	4.8M	¥3,065	-48.5%	¥369M ($2.4M)
2022-04-06	SELL	Market Buy	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	activist	4.8M	¥3,065	-48.5%	¥369M ($2.4M)
2022-04-06	SELL	Market Buy	アール・エス・テック・ホンコン・リミテッド R.S. TECH HONG KONG LIMITED	activist	4.8M	¥3,065	-48.5%	¥369M ($2.4M)
2022-04-06	BUY	unknown	日興アセットマネジメント株式会社 Nikko Asset Management Co.,Ltd.	other	120.4K	¥3,065	+48.5%	¥250M ($1.6M)
2022-04-06	BUY	unknown	三井住友トラスト・アセットマネジメント株式会社 Sumitomo Mitsui Trust Asset Management Co.,Ltd.	other	214.0K	¥3,065	+48.5%	¥12M ($77K)
2022-04-06	BUY	Market Buy	方永義 Nagayoshi Ho	activist	1.1M	¥3,065	+48.5%	¥59M ($383K)
2022-04-06	BUY	Market Buy	方永義 Nagayoshi Ho	activist	1.1M	¥3,065	+48.5%	¥59M ($383K)
2022-04-06	BUY	negotiated	方永義 Nagayoshi Ho	activist	1.1M	¥3,065	+48.5%	¥59M ($383K)
2022-04-06	BUY	negotiated	方永義 Nagayoshi Ho	activist	1.1M	¥3,065	+48.5%	¥3.2B ($20.8M)
2022-04-06	SELL	unknown	三井住友信託銀行株式会社 Sumitomo Mitsui Trust Bank,Limited	unknown	0	¥3,065	-48.5%	¥25M ($160K)
2021-07-01	BUY	Market Buy	BNYメロン・インベストメント・マネジメント・ジャパン株式会社 BNY Mellon Investment Management Japan Limited	other	985.1K	¥3,235	+40.6%	¥569M ($3.7M)
2021-06-07	BUY	Market Buy	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	1.2M	¥2,990	+52.2%	¥406M ($2.6M)
2021-04-30	SELL	unknown	BNYメロン・インベストメント・マネジメント・ジャパン株式会社 BNY Mellon Investment Management Japan Limited	other	809.5K	¥3,305	-37.7%	¥590M ($3.8M)
2021-04-07	BUY	Market Buy	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	1.1M	¥3,615	+25.9%	¥547M ($3.5M)

Frequently asked questions

Who has been buying RS Technologies Co., Ltd. stock?: 9 distinct investors have filed 10 disclosed large-shareholding filings in RS Technologies Co., Ltd. (3445), most recently on 2025-10-14. 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 RS Technologies Co., Ltd. have?: RS Technologies Co., Ltd. has 10 buy-side and 24 sell-side disclosures on record, covering ¥5.6B ($35.9M) in total reported value, spanning 2021-04-07 to 2025-10-14.
Where does StockDrifts get RS Technologies 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 RS Technologies Co., Ltd.. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.