SUBJECT-0957.dossier · person · status: active
MS
subject of file

Masayoshi Son

Founder, Chairman and CEO of SoftBank Group Corp, ultimate controller of Vision Fund
Tracked because Founder, Chairman and CEO of SoftBank Group Corp, ultimate controller of Vision Fund · 17 documented connections
Facts on record6
Connections mapped17
Sources cited16
✦ Thin coverage gap +44 connected to 17 entities · only 6 facts on record · flagged for follow-up research
Evidence: 1P 1S 4I
Network web → Timeline → Compare with… → Position Drift → Coverage tone → View on Graph → View Card → Export CSV JSON Dossier ← Entity Directory
Stated vs Revealed
No documented contradictions on file.
PATTERN company → [regulatory filing] → government agency → [regu... 8424× PATTERN person → [regulatory filing] → government agency → [regul... 3240× PATTERN government agency → [regulatory filing] → government agen... 2430× PATTERN organization → [regulatory filing] → government agency → ... 1863× PATTERN company → [oversight] → government agency → [regulatory f... 1863×
TIMELINE Role Overlap Visualizer →
Connection Map
Key Connections
→ Securities and Exchange Commission government agency
regulatory_filing
Masayoshi Son filed a filing with the SEC on 2010-06-17
Facts (6)
Data Freshness
Ageing Last update: 159d ago · Avg age: 3236d
Confidence Tiers: Primary Source — cross-referenced government/corporate filings Pending Review — sourced but not independently verified AI Inference — analytical hypothesis from cross-referencing
✓ Verified Findings (2)
Independently re-checked: a second model read the source artifact and confirmed it supports the extracted claim.
✓ verified Partially Corroborated Masayoshi Son filed filing with the SEC on 2010-06-17. Accession number: N/A.
✓ verified Primary Source Masayoshi Son owns 29.68% of SoftBank Group Corp as of March 31, 2025
Date: 2025-03-31 Added: 09 Apr 2026 ↗ SOURCE: SoftBank Group Corp ownership disclosures
All Connections (17)
→ SoftBank Vision Fund company
organizational link inferential since 2017
Masayoshi Son is the founder and CEO of SoftBank Group Corp, which controls SoftBank Vision Fund
organizational link inferential since 2017
Masayoshi Son's SoftBank Group owns SB Investment Advisers (UK) Limited, which manages the Vision Fund
organizational link inferential since 2017
Masayoshi Son's SoftBank Group controls SVF GP (Jersey) Limited, the general partner of the Vision Fund
affiliation inferential since 2017
Mubadala Investment Company is a major investor in SoftBank Vision Fund, which is controlled by Masayoshi Son's SoftBank Group
affiliation inferential since 2017
The Saudi Public Investment Fund is the largest investor in SoftBank Vision Fund, which is managed by Masayoshi Son's SoftBank Group
→ Alex Clavel person
organizational link inferential since 2020
Alex Clavel is a managing partner at SoftBank Investment Advisers, which is part of Masayoshi Son's SoftBank Group
→ Rajeev Misra person
organizational link inferential since 2017
Rajeev Misra was the CEO of SoftBank Investment Advisers, which manages the Vision Fund under Masayoshi Son's leadership
investor inferential since 2020
The Master Trust Bank of Japan acts as a trustee for SoftBank Group Corp, majority-owned by Masayoshi Son
→ Japan Trustee Services Bank institution
investor inferential since 2020
Japan Trustee Services Bank acts as a trustee for SoftBank Group Corp, majority-owned by Masayoshi Son
→ Securities and Exchange Commission government agency
regulatory_filing primary since 2010
Masayoshi Son filed a filing with the SEC on 2010-06-17
affiliation inferential since 2021
Masayoshi Son is the founder and CEO of SoftBank Group, the parent entity of SoftBank Investment Advisers.
Corporate Leadership inferential since 2022
Masayoshi Son is the founder and CEO of SoftBank Group, which is the parent of SoftBank Investment Advisers, making him the ultimate leadership figure connected to SB Investment Advisers (US) Inc.
Ultimate beneficial owner / principal inferential since 2026
Masayoshi Son is the founder and principal of SoftBank, the parent group that owns/controls SB Delta Fund GP (Jersey) Ltd through its investment advisory chain.
affiliation inferential since 2017
Through Mubadala's investment in the SoftBank Vision Fund, Tahnoun bin Zayed has a documented business relationship with SoftBank founder Masayoshi Son.
affiliation inferential since 2023
Masayoshi Son is the CEO and founder of SoftBank Group; SB Global Advisers Limited, as a SoftBank-related entity, is organizationally associated with him.
← Custody Bank of Japan institution
affiliation inferential since 2026
Masayoshi Son, founder of SoftBank, is listed near Custody Bank of Japan, suggesting the bank may provide custody services for SoftBank-related assets.
Ultimate Beneficial Owner / Founder inferential since 2026
Masayoshi Son is the founder and chairman of SoftBank Group, which ultimately controls SB Delta Fund (Jersey) L.P. through its investment advisory and GP entities.
Sources (16)
2004-03-24 ↗ SEC EDGAR: filing — Masayoshi Son (2004-03-24) sec_filing Processed 📜 Receipt
2008-02-22 ↗ SEC EDGAR: SC 13D/A — Son Masayoshi (2008-02-22) sec_filing Processed 📜 Receipt
2007-11-29 ↗ SEC EDGAR: SC 13D — Son Masayoshi (2007-11-29) sec_filing Processed 📜 Receipt
2010-06-17 ↗ SEC EDGAR: filing — Masayoshi Son (2010-06-17) sec_filing Processed 📜 Receipt
2005-08-30 ↗ SEC EDGAR: filing — Masayoshi Son (2005-08-30) sec_filing Processed 📜 Receipt
2026-05-10 UNVERIFIED SEARCH_ERROR: Masayoshi Son not found in fec claim_flag Processed 📜 Receipt
2017-02-17 ↗ SEC EDGAR: filing — Masayoshi Son (2017-02-17) sec_filing Processed 📜 Receipt
2003-03-14 ↗ SEC EDGAR: filing — Masayoshi Son (2003-03-14) sec_filing Processed 📜 Receipt
2008-03-03 ↗ SEC EDGAR: SC 13D/A — Son Masayoshi (2008-03-03) sec_filing Processed 📜 Receipt
2005-09-09 ↗ SEC EDGAR: filing — Masayoshi Son (2005-09-09) sec_filing Processed 📜 Receipt
2026 UNVERIFIED Research: Masayoshi Son — Parliamentary records (no results) parliamentary_record Processed 📜 Receipt
2026 UNVERIFIED Research: Masayoshi Son — Court records (no results) court_document Processed 📜 Receipt
2026 UNVERIFIED Research: Masayoshi Son — Lobbying disclosures (no results) government_disclosure Processed 📜 Receipt
2026 UNVERIFIED Research: Masayoshi Son — FEC donations (no results) fec_record Processed 📜 Receipt
2010-06-17 ↗ SEC EDGAR: filing — Masayoshi Son (2010-06-17) web_search Processed 📜 Receipt
2025-03-31 ↗ SoftBank Group Corp ownership disclosures web_search Processed 📜 Receipt