Pete Briger
About Pete Briger
Pete Briger is chairman of the board of Fortress Investment Group. He joined Fortress in 2002 and was co-CEO until 2024. Before that he spent 15 years at Goldman Sachs and became a partner in 1996. A Nasdaq profile says he co-founded Goldman's Special Situations Group in 1997.
He has been an independent board member of Strategy since July 2025. He serves or has served on the boards of, or advised, Princeton University, the UCSF Foundation, Tipping Point and the Guild Theatre in Menlo Park. He also established the Briger Foundation for Oncology Research. Crunchbase lists him in San Francisco.
Crunchbase lists 5 personal investments and PitchBook also counts 5. The ones with dates are SafeGraph (Series A, April 2017), Biproxi (seed, September 2018) and Windfall (seed, March 2021). Crunchbase also lists Stella and Wauwaa. Crunchbase and PitchBook list advisory roles at Long Arc Capital, Ego Death Capital and Boyd Point.
He has not published a personal investment thesis. The record above comes from third-party databases, which may be incomplete.
Briger was one of the individual backers in Multiplier's $6M seed round, announced in August 2026. Lux Capital led the round, with Y Combinator and several other funds taking part. Other individual investors included Bridgewater co-CIOs Greg Jensen and Karen Karniol-Tambour and DeepMind chief strategy officer Jasjeet Sekhon.
Multiplier is a New York company founded by ex-Bridgewater employees. It builds AI agents and infrastructure for asset managers, deployed inside each customer's own systems. Its announcement says it was live with five fundamental equity hedge funds at the time.
Briger's disclosed angel deals are early stage: a Series A, two seeds and the Multiplier seed. They span data, finance and enterprise software. Investor databases tag him with commercial real estate, financial services and real estate, which matches his Fortress career. His AI deal so far is in finance. He has made no public statement on check size or on what he looks for in founders, so none is given here.
- Multiplier: AI agents and infrastructure for asset managers; seed round announced August 2026.
- SafeGraph: location data company; Series A in April 2017.
- Biproxi: seed round in September 2018.
- Windfall: seed round in March 2021.
- fintech.global/2026/08/27/investors-bet-6m-that-multiplier-can-fix-fin
- multiplier.ai/blog/announcing-our-6m-seed
- pulse2.com/multiplier-raises-6-million-seed-funding-to-build-ai-operat
- cbinsights.com/company/withai
- crunchbase.com/person/peter-briger
- pitchbook.com/profiles/investor/228765-61
- signal.nfx.com/investors/pete-briger
- investorhunt.co/investors/pete-briger
Investing activity
Pete Briger appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $6M. The most recent is Multiplier (Seed, $6M, Aug 2026).
Pete Briger most often invests alongside Lux Capital, Sandeep Nailwal, General Advance and Rebel Fund, and the companies they back on Lounge are mostly in AI.
Deals
Frequently asked questions about Pete Briger
Is Pete Briger an angel investor in AI companies?
Yes. He was among the individual investors in Multiplier's $6M seed round, announced in August 2026. Multiplier builds AI infrastructure for asset managers.
Who is Pete Briger?
He is chairman of Fortress Investment Group, where he was co-CEO until 2024. He spent 15 years at Goldman Sachs before joining Fortress in 2002.
What is Pete Briger's check size?
It is not public. Databases list some of his deals, but none of them gives a reliable personal check size.
What stage does Pete Briger invest in?
His disclosed angel deals are at Series A and seed. They include SafeGraph (Series A, 2017), Biproxi (seed, 2018), Windfall (seed, 2021) and Multiplier (seed, 2026).
Where is Pete Briger based?
Crunchbase and PitchBook list him in San Francisco, California.
What should founders know before pitching Pete Briger?
His public record is mostly in finance and finance-related software. His AI deal so far, Multiplier, serves asset managers. He has not published his criteria, so check recent announcements before you pitch.
Is Pete Briger an angel investor?
Yes. Pete Briger invests personally as an angel.
What AI companies has Pete Briger invested in?
Pete Briger's AI investments include Multiplier. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
What stage does Pete Briger invest at?
In the rounds tracked on Lounge, Pete Briger has invested at Seed, with a median round of $6M.
Who does Pete Briger co-invest with?
Pete Briger's most frequent co-investors on Lounge are Lux Capital (1 deal), Sandeep Nailwal (1 deal), General Advance (1 deal), Rebel Fund (1 deal) and Amino Capital (1 deal).