Updated:
Boxcar Partners
Boxcar Partners was established in 2019 through the merger of three family offices. Mark Heffernan brings biotechnology experience from NexImmune.
Boxcar Partners
Boxcar Partners was established in 2019 through the merger of three family offices. Mark Heffernan brings biotechnology experience from NexImmune. Jack Ginter contributed background in institutional securities trading at Abbot Downing. Peter Feinberg previously co-founded BridgeBio Pharma. The firm allocates to early-stage private companies and venture funds. It uses direct co-investments, SPVs and fund-of-funds structures. Focus areas include Digital Health, Biotech and Enterprise Software. Activity centers on North America. The Heffernan Family Foundation operates alongside the office. Jack Ginter holds membership in Tiger 21. Mark Heffernan participates in BIO. No public AUM figure exists.
General information
Firm type
Multi Family Office
Year founded
2019
AUM
Undisclosed
Location
Region
North America
Country
United States
City
New York
Corporate office
300 Park Avenue, 2nd Floor, New York, NY 10022, United States
Additional offices
Florida, United States
Principals
Mark Heffernan
Managing Partner
Jack Ginter
Managing Partner
Peter Feinberg
Founding Member and Partner
Steven Spinner
Partner
Sector focus
Frequently asked questions
Who runs investment decisions at Boxcar Partners?
Mark Heffernan, Jack Ginter and Peter Feinberg serve as managing partners. Steven Spinner joined as partner in 2021. Decisions draw on their operating backgrounds in biotechnology and trading.
How does Boxcar Partners source proprietary deal flow?
Principals leverage networks from prior roles at NexImmune, BridgeBio Pharma and Abbot Downing. Memberships in Tiger 21 and BIO provide additional channels.
Is Boxcar Partners structured as a single family office or does it operate more like a venture firm?
It functions as a multi-family office formed from three family offices. Capital deploys through direct co-investments, SPVs and fund-of-funds in early-stage companies.
Where does the underlying wealth come from?
Wealth originates from biotechnology innovation linked to NexImmune and BridgeBio Pharma plus institutional securities trading at Abbot Downing.
Does Boxcar Partners maintain philanthropic structures, and how are they separated?
The Heffernan Family Foundation exists as a separate vehicle. It operates alongside the investment office without disclosed overlap in mandate.
Profile maintained by Altss using OSINT (open-source intelligence), regulatory filings, licensed data partners, and verified direct submissions. Read the methodology. Last updated: . Continuous refresh with full update cycles at least every 30 days.
Need institutional-grade insight on family offices?
Altss delivers:
Prefer a guided tour?
We’ll walk you through: