Who has been buying SoftBank Corp. stock?

13 distinct investors have filed 15 disclosed large-shareholding filings in SoftBank Corp. (9434), most recently on 2025-12-04. 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 SoftBank Corp. have?

SoftBank Corp. has 15 buy-side and 6 sell-side disclosures on record, covering ¥6.29T ($40.6B) in total reported value, spanning 2021-07-07 to 2025-12-04.

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.

SoftBank Corp. 9434

Company

ソフトバンク株式会社SoftBank Corp.

Investors

Buys

Total Value

¥6.29T ($40.6B)

Avg Return

+20.24%

Last Filing

2025-12-04

SoftBank Corp. (9434) has 15 disclosed large-shareholding filings and 6 disclosed disposals on record, filed by 13 distinct investors. Together those filings cover ¥6.29T ($40.6B) in reported transaction value. The earliest filing StockDrifts holds for SoftBank Corp. is dated 2021-07-07; the most recent is 2025-12-04. Across these filings the average return since disclosure is +20.24%, 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
2025-12-04	SELL	unknown	ソフトバンクグループジャパン株式会社	strategic	5707.7M	¥218.9	-12.3%	¥849.6B ($5.5B)
2025-12-04	BUY	unknown	ムーンライトファイナンス合同会社	strategic	13440.9M	¥218.9	+12.3%	¥834.9B ($5.4B)
2025-12-04	SELL	unknown	ソフトバンクグループジャパン株式会社	strategic	5707.7M	¥218.9	-12.3%	¥851.6B ($5.5B)
2025-12-04	BUY	unknown	ムーンライトファイナンス合同会社	strategic	13440.9M	¥218.9	+12.3%	¥832.7B ($5.4B)
2025-02-14	SELL	unknown	ソフトバンクグループジャパン株式会社 SoftBank Group Japan Corporation	strategic	9556.3M	¥208.5	-17.9%	¥111.5B ($719.5M)
2025-02-14	BUY	unknown	ムーンライトファイナンス合同会社 Moonlight Finance LLC	strategic	9592.3M	¥208.5	+17.9%	¥110.5B ($713.1M)
2024-12-19	BUY	Market Buy	ソフトバンクグループジャパン株式会社 SoftBank Group Japan Corporation	strategic	10085.7M	¥197.4	+24.6%	¥143.2B ($924.2M)
2024-12-19	SELL	Market Buy	ムーンライトファイナンス合同会社 Moonlight Finance LLC	strategic	9062.9M	¥197.4	-24.6%	¥40.5B ($261.4M)
2024-12-19	SELL	Market Buy	Cayman Project 6 Limited	strategic	0	¥197.4	-24.6%	¥92.4B ($595.8M)
2024-06-06	BUY	Market Buy	ブラックロック(ルクセンブルグ)エス・エーS.A.) BlackRock (Luxembourg	passive	5.0M	¥194.5	+26.4%	¥969M ($6.3M)
2024-06-06	BUY	Market Buy	ブラックロック・ジャパン株式会社 BlackRock Japan Co., Ltd.	passive	68.5M	¥194.5	+26.4%	¥13.3B ($85.9M)
2024-06-06	BUY	Market Buy	ブラックロック(ネザーランド)BVBV) BlackRock (Netherlands	passive	8.3M	¥194.5	+26.4%	¥1.6B ($10.4M)
2024-06-06	BUY	Market Buy	ブラックロック・ファンド・マネジャーズ・リミテッド BlackRock Fund Managers Limited	passive	12.1M	¥194.5	+26.4%	¥2.4B ($15.2M)
2024-06-06	BUY	Market Buy	ブラックロック・アセット・マネジメント・カナダ・リミテッド BlackRock Asset Management Canada Limited	passive	4.8M	¥194.5	+26.4%	¥939M ($6.1M)
2024-06-06	BUY	Market Buy	ブラックロック・アセット・マネジメント・アイルランド・リミテッド BlackRock Asset Management Ireland Limited	passive	28.9M	¥194.5	+26.4%	¥5.6B ($36.2M)
2024-06-06	BUY	Market Buy	ブラックロック・ファンド・アドバイザーズ BlackRock Fund Advisors	passive	66.7M	¥194.5	+26.4%	¥13.0B ($83.7M)
2024-06-06	BUY	Market Buy	ブラックロック・インスティテューショナル・トラスト・カンパニー、エヌ.エイ.(BlackRock Institutional Trust Company BlackRock Institutional Trust Company, N.A.	passive	45.5M	¥194.5	+26.4%	¥8.8B ($57.1M)
2023-03-01	BUY	unknown	ムーンライトファイナンス合同会社 Moonlight Finance LLC	strategic	929.0M	¥153	-	-
2023-03-01	BUY	unknown	Cayman Project 6 Limited	strategic	47.0M	¥153	-	¥7.2B ($46.4M)
2023-03-01	SELL	unknown	ソフトバンクグループジャパン株式会社 SoftBank Group Japan Corporation	strategic	938.8M	¥153	-60.7%	¥7.2B ($46.3M)
2023-02-20	BUY	unknown	ソフトバンクグループジャパン株式会社 SoftBank Group Japan Corporation	strategic	985.8M	¥153.25	-	-
2023-02-20	BUY	unknown	ムーンライトファイナンス合同会社 Moonlight Finance LLC	strategic	929.0M	¥153.25	-	-
2021-12-22	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー Capital Research and Management Company	passive	192.2M	¥144.6	+70.1%	¥27.4B ($176.8M)
2021-12-22	BUY	Market Buy	キャピタル・インターナショナル株式会社 Capital International Co., Ltd.	passive	14.1M	¥144.6	+70.1%	¥554M ($3.6M)
2021-07-07	BUY	Market Buy	キャピタル・リサーチ・アンド・マネージメント・カンパニー Capital Research and Management Company	passive	289.2M	¥144.5	+70.2%	¥5.5B ($35.7M)
2021-07-07	BUY	Market Buy	キャピタル・インターナショナル株式会社 Capital International Co., Ltd.	passive	10.1M	¥144.5	-	¥1.5B ($9.4M)

Frequently asked questions

Who has been buying SoftBank Corp. stock?: 13 distinct investors have filed 15 disclosed large-shareholding filings in SoftBank Corp. (9434), most recently on 2025-12-04. 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 SoftBank Corp. have?: SoftBank Corp. has 15 buy-side and 6 sell-side disclosures on record, covering ¥6.29T ($40.6B) in total reported value, spanning 2021-07-07 to 2025-12-04.
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.