Breyer Capital — Activity | F4

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Breyer Capital Activity

Every public signal F4 has attached to this firm, with sources and cross-entity links.

Types

Time range

Investment

Participated in Catena Labs' $18M seed round (led by a16z) for a company building new Internet identity, communications, AI, and commerce infrastructure.

Catena Labs

Catena Labs Breyer Capital

crowdfundinsider.com

Added recently

Investment

Backed SandboxAQ, an Alphabet spin-out combining AI and quantum computing for life sciences, data security, and clean energy applications.

Sandbox AQ

Sandbox AQ Breyer Capital

Added recently

Talk

Jim Breyer participated as a speaker at the Milken Institute Global Conference 2025.

Jim Breyer at Milken Institute Global Conference 2025

milkeninstitute.org

Added recently

Team Change

Appointed Dr. Bret Bostwick (FAAP, FACMG), physician-scientist at Alnylam Pharmaceuticals, as Venture Advisor to expand healthcare and life sciences investment capabilities.

Dr. Bret Bostwick joins as Venture Advisor

businesswire.comDEC 2025

DEC 2025

Investment

Participated in Harbor Health's $225M+ growth round; Harbor Health provides primary and specialty care with integrated health insurance.

Harbor Health

Harbor HealthBreyer Capital

parsers.vcSEP 2025

SEP 2025

Investment

Led Jarsy's $5M pre-seed round for a Web3 platform that tokenizes access to private equity investments.

Jarsy

JarsyBreyer Capital

theblock.coJUN 2025

JUN 2025

Team Change

Appointed Morgan Cheatham, MD as Partner and Head of Healthcare and Life Sciences, joining from Bessemer Venture Partners VP role where he sourced Abridge and Hinge Health.

Morgan Cheatham joins as Partner and Head of Healthcare and Life Sciences

businesswire.comAPR 2025

APR 2025

Press

Jim Breyer appeared on CNBC's Money Movers to discuss the Stargate Project investment in AI infrastructure and Breyer Capital's AI thesis.

Jim Breyer discusses Stargate Project and AI Infrastructure on CNBC

cnbc.comJAN 2025

JAN 2025

Essay

Jim Breyer published a comprehensive Healthcare AI Investment Thesis covering AI drug discovery, phenotyping, clinical trials, back-office automation, and clinician empowerment.

Breyer Capital Healthcare AI Investment Thesis: Learnings and Predictions (Fall 2023)

medium.comNOV 2023

NOV 2023