Who has been buying Sansan, Inc. stock?

6 distinct investors have filed 20 disclosed large-shareholding filings in Sansan, Inc. (4443), most recently on 2026-04-23. 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 Sansan, Inc. have?

Sansan, Inc. has 20 buy-side and 37 sell-side disclosures on record, covering ¥167.8B ($1.1B) in total reported value, spanning 2021-03-24 to 2026-04-23.

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.

Sansan, Inc. 4443

Company

Sansan株式会社Sansan, Inc.

Investors

Buys

Total Value

¥167.8B ($1.1B)

Avg Return

-6.60%

Last Filing

2026-04-23

Sansan, Inc. (4443) has 20 disclosed large-shareholding filings and 37 disclosed disposals on record, filed by 6 distinct investors. Together those filings cover ¥167.8B ($1.1B) in reported transaction value. The earliest filing StockDrifts holds for Sansan, Inc. is dated 2021-03-24; the most recent is 2026-04-23. Across these filings the average return since disclosure is -6.60%, 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
2026-08-20	BUY	Market Buy	ウエリントン・マネージメント・カンパニー・エルエルピー Wellington Management Company LLP	other	409.2K	¥2,220	-7.2%	¥56M ($363K)
2026-08-20	SELL	unknown	ウエリントン・マネージメント・ジャパン・ピーティーイー・リミテッド Wellington Management Japan Pte Ltd	other	3.4M	¥2,220	+7.2%	¥3.0B ($19.4M)
2026-08-20	BUY	Market Buy	ウエリントン・マネージメント・シンガポール・ピーティーイー・リミテッド Wellington Management Singapore Pte. Ltd.	other	1.7M	¥2,220	-7.2%	¥732M ($4.7M)
2026-08-10	BUY	Market Buy	いちごアセットマネジメント・インターナショナル・ピーティーイー・リミテッド Ichigo Asset Management International, Pte. Ltd.	passive	17.3M	¥1,952	+5.5%	¥2.5B ($16.4M)
2026-08-10	BUY	Market Buy	いちごアセットマネジメント株式会社	engagement	100	¥1,952	-	-
2026-07-28	BUY	Market Buy	いちごアセットマネジメント株式会社	engagement	100	¥1,971	-	¥197K ($1K)
2026-07-28	BUY	Market Buy	いちごアセットマネジメント・インターナショナル・ピーティーイー・リミテッド Ichigo Asset Management International, Pte. Ltd.	passive	16.0M	¥1,971	+4.5%	¥2.7B ($17.3M)
2026-06-19	BUY	Market Buy	いちごアセットマネジメント・インターナショナル・ピーティーイー・リミテッド Ichigo Asset Management International, Pte. Ltd.	passive	14.7M	¥1,438	+43.3%	¥2.1B ($13.3M)
2026-06-19	BUY	Market Buy	いちごアセットマネジメント株式会社	engagement	100	¥1,438	-	¥144K ($928)
2026-05-29	BUY	Market Buy	いちごアセットマネジメント・インターナショナル・ピーティーイー・リミテッド(Ichigo Asset Management International, Pte. Ltd.) Ichigo Asset Management International, Pte. Ltd.	passive	13.2M	¥1,679	+22.7%	¥2.1B ($13.9M)
2026-05-22	BUY	Market Buy	いちごアセットマネジメント・インターナショナル・ピーティーイー・リミテッド(Ichigo Asset Management International, Pte. Ltd.) Ichigo Asset Management International, Pte. Ltd.	passive	12.0M	¥1,470	+40.1%	¥17.6B ($113.4M)
2026-05-20	BUY	unknown	ウエリントン・マネージメント・カンパニー・エルエルピー Wellington Management Company LLP	other	377.8K	¥1,390	+48.2%	¥525M ($3.4M)
2026-05-20	BUY	unknown	ウエリントン・マネージメント・ジャパン・ピーティーイー・リミテッド Wellington Management Japan Pte Ltd	other	4.7M	¥1,390	+48.2%	¥6.6B ($42.6M)
2026-05-20	BUY	unknown	ウエリントン・マネージメント・シンガポール・ピーティーイー・リミテッド Wellington Management Singapore Pte. Ltd.	other	1.3M	¥1,390	+48.2%	¥1.8B ($11.8M)
2026-04-23	SELL	Market Buy	グリーンノークス・キャピタル・パートナーズ・エルエルシー(Greenoaks Capital Partners LLC) Greenoaks Capital Partners LLC	passive	6.2M	¥1,296	-59.0%	¥1.9B ($12.1M)
2026-04-02	SELL	Market Buy	グリーンノークス・キャピタル・パートナーズ・エルエルシー(Greenoaks Capital Partners LLC) Greenoaks Capital Partners LLC	passive	7.6M	¥1,192	-72.8%	¥1.6B ($10.4M)
2026-03-17	SELL	Market Buy	グリーンノークス・キャピタル・パートナーズ・エルエルシー(Greenoaks Capital Partners LLC) Greenoaks Capital Partners LLC	passive	9.0M	¥1,122	-83.6%	¥1.5B ($9.9M)
2026-03-09	SELL	Market Buy	グリーンノークス・キャピタル・パートナーズ・エルエルシー(Greenoaks Capital Partners LLC) Greenoaks Capital Partners LLC	passive	10.4M	¥1,273	-61.8%	¥1.7B ($10.9M)
2026-03-02	BUY	unknown	寺田親弘	activist	8.6M	¥1,151	-	-
2026-03-02	BUY	unknown	株式会社CNK	activist	32.8M	¥1,151	-	-
2026-02-20	BUY	unknown	寺田親弘	activist	8.6M	¥1,105	-	-
2026-02-20	BUY	unknown	株式会社CNK	activist	32.8M	¥1,105	-	-
2026-01-09	BUY	unknown	寺田親弘	activist	8.6M	¥1,794	+14.8%	¥136M ($880K)
2026-01-09	SELL	unknown	株式会社CNK	activist	32.8M	¥1,794	-14.8%	¥136M ($880K)
2025-04-04	BUY	unknown	寺田親弘 Chikahiro Terada	activist	8.5M	¥1,824	-	-
2025-04-04	BUY	unknown	寺田親弘 Chikahiro Terada	activist	8.5M	¥1,824	-	-
2025-04-04	SELL	unknown	寺田親弘 Chikahiro Terada	activist	8.5M	¥1,824	-12.9%	¥161M ($1.0M)
2025-04-04	BUY	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥1,824	-	-
2025-04-04	BUY	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥1,824	-	-
2025-04-04	SELL	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥1,824	-12.9%	¥138M ($892K)
2025-03-14	SELL	unknown	寺田親弘 Chikahiro Terada	activist	8.5M	¥1,941	-6.1%	¥172M ($1.1M)
2025-03-14	SELL	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥1,941	-6.1%	¥147M ($950K)
2025-03-14	SELL	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥1,941	-6.1%	¥147M ($950K)
2025-03-14	SELL	unknown	寺田親弘 Chikahiro Terada	activist	8.5M	¥1,941	-6.1%	¥172M ($1.1M)
2024-12-17	SELL	unknown	寺田親弘 Chikahiro Terada	activist	8.5M	¥2,455	+16.1%	¥2.9B ($18.8M)
2024-12-17	SELL	unknown	寺田親弘 Chikahiro Terada	activist	8.5M	¥2,455	+16.1%	¥2.9B ($18.8M)
2024-12-17	SELL	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥2,455	+16.1%	¥186M ($1.2M)
2024-12-17	SELL	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥2,455	+16.1%	¥186M ($1.2M)
2024-07-19	BUY	Market Buy	グリーンノークス・キャピタル・パートナーズ・エルエルシー(Greenoaks Capital Partners LLC) Greenoaks Capital Partners LLC	passive	11.6M	¥2,270	-9.3%	¥3.0B ($19.4M)
2024-04-22	BUY	Market Buy	グリーンノークス・キャピタル・パートナーズ・エルエルシー(Greenoaks Capital Partners LLC) Greenoaks Capital Partners LLC	passive	10.3M	¥1,405	+46.6%	¥1.9B ($12.0M)
2024-04-16	SELL	unknown	寺田親弘 Chikahiro Terada	activist	9.7M	¥1,445	-42.6%	¥15.8B ($102.3M)
2024-04-16	SELL	unknown	寺田親弘 Chikahiro Terada	activist	9.7M	¥1,445	-42.6%	¥15.9B ($102.4M)
2024-04-16	BUY	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥1,445	+42.6%	¥15.9B ($102.6M)
2024-04-16	BUY	unknown	株式会社CNK CNK Co., Ltd.	activist	32.8M	¥1,445	+42.6%	¥15.9B ($102.5M)
2024-03-29	SELL	unknown	株式会社CNK CNK Co., Ltd.	activist	21.8M	¥1,757	-17.3%	¥44M ($285K)
2024-03-29	BUY	unknown	株式会社CNK CNK Co., Ltd.	activist	21.8M	¥1,757	-	-
2024-03-29	BUY	unknown	寺田親弘 Chikahiro Terada	activist	20.7M	¥1,757	-	-
2024-03-29	SELL	unknown	寺田親弘 Chikahiro Terada	activist	20.7M	¥1,757	-17.3%	¥44M ($285K)
2024-03-29	BUY	unknown	寺田親弘 Chikahiro Terada	activist	20.7M	¥1,757	-	-
2024-03-29	SELL	unknown	寺田親弘 Chikahiro Terada	activist	20.7M	¥1,757	-17.3%	¥44M ($285K)

Showing the 50 most recent of 90 filings.

Frequently asked questions

Who has been buying Sansan, Inc. stock?: 6 distinct investors have filed 20 disclosed large-shareholding filings in Sansan, Inc. (4443), most recently on 2026-04-23. 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 Sansan, Inc. have?: Sansan, Inc. has 20 buy-side and 37 sell-side disclosures on record, covering ¥167.8B ($1.1B) in total reported value, spanning 2021-03-24 to 2026-04-23.
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.