AUM
~$100+ billion (managing Bloomberg's personal and philanthropic assets)
Principals
4
Principal Net Worth
$106.2B
Founded
2010
Data Flags
None - Forbes confirms $106.2B net worth (Jan 2026); $3.7B donated 2024 (#1 US donor); team leadership verified
Willett Advisors Research
SFOHigh Confidence25 East 78th Street, New York, NY 10075 (also 650 Madison Avenue)
Last verified: Jan 17, 2026
Details
- Website
- willettadvisors.com
- Phone
- (212) 783-9500
- Source of Wealth
- Finance / Media (Bloomberg LP)
- Assets Under Management
- ~$100+ billion (managing Bloomberg's personal and philanthropic assets)
- Source File
- research/organizations/willett-advisors.md
- UID
- fo-willett-advisors
Also Known As
Willett Advisors LLCWillett AdvisorsBloomberg Family OfficeMichael Bloomberg Family Office
Principals (4)
Key Executives (1)
| Name | Title | |
|---|---|---|
| Andrew Mulderry | CIO | - |
Team Members (2)
Related Entities (4)
Known Associates (3)
Relationship Strength
Loading relationships...
Sources (10)
- Willett Advisors Official Website
- Wikipedia - Michael Bloomberg
- Forbes - Michael Bloomberg Profile
- Family Office Hub - Willett Advisors
- CB Insights - Willett Advisors
- Observer - Bloomberg Top Philanthropist 2024
- Chronicle of Philanthropy - Philanthropy 50
- CNBC - Bloomberg on Giving
- Dealroom - Willett Advisors
- Altss - Willett Advisors
Changelog
- 2025-12-10Initial research file created
- 2025-12-11Expanded Current Team section with detailed leadership structure and related entity leadership (Bloomberg LP: Vlad Kliatchko - CEO, Mark Carney - Chair; Bloomberg Philanthropies: Patti Harris - CEO)
- 2026-01-17Corrected CIO - Andrew Mulderry is the actual CIO (not Matthew Saal). Previous entry was an error. Mulderry became Co-CIO in Jan 2017 (with Brad Briner) when Alice Ruth left for Dartmouth; subsequently became sole CIO. Created talent profile talent/andrew-mulderry