Who has been buying Sharingtechnology, Inc. stock?

10 distinct investors have filed 30 disclosed large-shareholding filings in Sharingtechnology, Inc. (3989), most recently on 2026-03-18. 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 Sharingtechnology, Inc. have?

Sharingtechnology, Inc. has 30 buy-side and 13 sell-side disclosures on record, covering ¥3.0B ($19.5M) in total reported value, spanning 2021-08-20 to 2026-03-18.

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.

Sharingtechnology, Inc. 3989

Company

シェアリングテクノロジー株式会社Sharingtechnology, Inc.

Investors

Buys

Total Value

¥3.0B ($19.5M)

Avg Return

+52.83%

Last Filing

2026-03-18

Sharingtechnology, Inc. (3989) has 30 disclosed large-shareholding filings and 13 disclosed disposals on record, filed by 10 distinct investors. Together those filings cover ¥3.0B ($19.5M) in reported transaction value. The earliest filing StockDrifts holds for Sharingtechnology, Inc. is dated 2021-08-20; the most recent is 2026-03-18. Across these filings the average return since disclosure is +52.83%, 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
2026-09-25	BUY	unknown	ゴールドマン・サックス・インターナショナル(Goldman Sachs International) Goldman Sachs International	other	1.8M	¥1,545	+0.0%	¥2.7B ($17.7M)
2026-09-24	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	797.4K	¥1,545	+0.0%	¥1.2B ($7.9M)
2026-09-24	BUY	unknown	野村證券株式会社	other	550.2K	¥1,545	+0.0%	¥850M ($5.5M)
2026-09-24	BUY	unknown	東海東京証券株式会社 Tokai Tokyo Securities Co., Ltd.	other	1.3M	¥1,545	+0.0%	¥2.1B ($13.3M)
2026-09-18	SELL	Market Buy	SBIアセットマネジメント株式会社 SBI Asset Management Co., Ltd.	passive	1.0M	¥1,545	+0.0%	¥389M ($2.5M)
2026-09-16	BUY	subscription	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	passive	7.1M	¥1,545	+0.0%	¥302M ($1.9M)
2026-03-18	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	6.9M	¥1,218	+26.9%	¥324M ($2.1M)
2026-03-04	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	6.6M	¥1,199	+28.9%	¥305M ($2.0M)
2026-02-19	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	6.4M	¥1,119	+38.1%	¥760M ($4.9M)
2026-02-18	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	5.7M	¥1,090	+41.7%	¥266M ($1.7M)
2026-02-04	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	5.4M	¥1,137	+35.9%	¥308M ($2.0M)
2026-01-05	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	5.2M	¥1,160	+33.2%	¥298M ($1.9M)
2025-12-22	SELL	Market Buy	株式会社ポートフォリア Portfolia Inc.	passive	1.2M	¥1,190	-29.8%	¥305M ($2.0M)
2025-12-16	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	4.9M	¥1,177	+31.3%	¥313M ($2.0M)
2025-12-04	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	4.6M	¥1,122	+37.7%	¥359M ($2.3M)
2025-11-11	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	4.3M	¥922	+67.6%	¥257M ($1.7M)
2025-09-24	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	4.0M	¥1,050	+47.1%	¥272M ($1.8M)
2025-09-22	SELL	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	1.1M	¥1,050	-47.1%	¥477M ($3.1M)
2025-09-10	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	3.8M	¥1,028	+50.3%	¥254M ($1.6M)
2025-08-22	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	3.5M	¥1,154	+33.9%	¥414M ($2.7M)
2025-05-09	BUY	Market Buy	SBIアセットマネジメント株式会社 SBI Asset Management Co., Ltd.	passive	1.0M	¥1,102	+40.2%	¥1.1B ($7.1M)
2025-05-09	BUY	Market Buy	株式会社SBI証券 SBI SECURITIES Co.,Ltd.	other	191.0K	¥1,102	+40.2%	¥211M ($1.4M)
2025-02-06	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	3.0M	¥867	+78.2%	¥212M ($1.4M)
2025-01-27	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.8M	¥889	+73.8%	¥242M ($1.6M)
2025-01-16	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.5M	¥854	+80.9%	¥232M ($1.5M)
2024-12-20	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.2M	¥934	+65.4%	¥221M ($1.4M)
2024-12-16	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	2.0M	¥1,018	+51.8%	¥274M ($1.8M)
2024-12-11	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	1.7M	¥988	+56.4%	¥266M ($1.7M)
2024-12-09	SELL	Market Buy	綿引一 Watahiki Hajime	passive	1.1M	¥986	-56.7%	¥236M ($1.5M)
2024-12-06	BUY	unknown	フィデリティ投信株式会社 FIL Investments (Japan) Limited	other	1.4M	¥943	+63.8%	¥1.4B ($8.8M)
2024-12-02	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	1.5M	¥921	+67.8%	¥235M ($1.5M)
2024-11-29	SELL	Market Buy	綿引一 Watahiki Hajime	passive	1.4M	¥922	-67.6%	¥219M ($1.4M)
2024-11-29	BUY	Market Buy	綿引一 Watahiki Hajime	passive	1.4M	¥922	-	¥227M ($1.5M)
2024-10-15	BUY	Market Buy	綿引一 Watahiki Hajime	passive	1.6M	¥820	-	¥270M ($1.7M)
2024-10-15	SELL	Market Buy	綿引一 Watahiki Hajime	passive	1.6M	¥820	-88.4%	¥270M ($1.7M)
2024-09-24	SELL	Market Buy	株式会社ポートフォリア Portfolia Inc.	passive	1.4M	¥835	-85.0%	¥515M ($3.3M)
2024-08-21	BUY	Market Buy	アセット・バリュー・インベスターズ・リミテッド (Asset Value Investors Limited) Asset Value Investors Limited	activist	1.2M	¥686	+125.2%	¥827M ($5.3M)
2024-06-07	BUY	Market Buy	株式会社ポートフォリア Portfolia Inc.	passive	2.0M	¥563	+174.4%	¥181M ($1.2M)
2024-03-07	BUY	Market Buy	株式会社ポートフォリア Portfolia Inc.	passive	1.6M	¥495	+212.1%	¥812M ($5.2M)
2023-06-02	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	412.2K	¥648	+138.4%	¥261M ($1.7M)
2023-06-02	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	312.5K	¥648	+138.4%	¥194M ($1.2M)
2023-05-29	BUY	unknown	野村證券株式会社 Nomura Securities Co.,Ltd.	other	953.7K	¥570	+171.1%	¥544M ($3.5M)
2023-05-29	BUY	unknown	ノムラインターナショナルピーエルシー NOMURA INTERNATIONAL PLC	other	1.3M	¥570	+171.1%	¥761M ($4.9M)
2023-01-04	SELL	unknown	綿引一 Hajime Watahiki	strategic	1.8M	¥236	-	¥59M ($379K)
2023-01-04	SELL	unknown	綿引一 Hajime Watahiki	strategic	2.1M	¥236	-	¥143M ($924K)
2022-05-10	SELL	unknown	引字圭祐 KEISUKE HIKIJI	strategic	860.6K	¥124	-	¥44M ($286K)
2022-05-10	SELL	unknown	引字圭祐 KEISUKE HIKIJI	strategic	1.7M	¥124	-	¥185M ($1.2M)
2022-04-19	BUY	unknown	引字圭祐 KEISUKE HIKIJI	strategic	1.2M	¥136	-	¥30M ($195K)
2022-04-19	SELL	unknown	引字圭祐 KEISUKE HIKIJI	strategic	2.9M	¥136	-	¥31M ($197K)
2022-01-20	SELL	unknown	楽天証券株式会社 Rakuten Securities Inc	other	264.5K	¥91	-	¥92M ($593K)

Showing the 50 most recent of 53 filings.

Frequently asked questions

Who has been buying Sharingtechnology, Inc. stock?: 10 distinct investors have filed 30 disclosed large-shareholding filings in Sharingtechnology, Inc. (3989), most recently on 2026-03-18. 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 Sharingtechnology, Inc. have?: Sharingtechnology, Inc. has 30 buy-side and 13 sell-side disclosures on record, covering ¥3.0B ($19.5M) in total reported value, spanning 2021-08-20 to 2026-03-18.
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.

More on this data

Every trade listed above comes from an official regulatory disclosure. For how StockDrifts scores these disclosures, see the Japan insider signal tier research, or browse every Japanese stock we track.