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Schooner Capital
AddedFeb 13, 2024
UpdatedJun 28, 2026
Schooner Capital

Schooner Capital

Operating

Schooner Capital: A Boston-based private equity firm, fostering independent thinking since 1971.

Location
Boston, MA, US
Founded
1971
Firm
Compare
Portfolio
Employees
Website

Schooner Capital, a Boston-based private investment firm established in 1971, focuses on venture capital and public securities investments. The firm values independent judgment and contrarian thinking, fostering a collegial atmosphere among its experienced team. While specific investment sizes are not disclosed, Schooner Capital participates in various funding rounds, from seed to Series C.

Notable portfolio companies include Commonwealth Fusion Systems, Cullinan Oncology, and Selux Diagnostics. Schooner Capital's investment philosophy emphasizes supporting innovative ideas across diverse sectors, including healthcare, technology, and energy. The firm's long-standing presence in the investment landscape and its commitment to fostering independent thinking contribute to its unique value proposition for portfolio companies.

Schooner Capital - Portfolio Snapshot

Portfolio activity breakdown across disclosed investments and stages

Total Investments40
Current Portfolio Count19
Total Portfolio Exits1

Top Investment Stages

Series Unknown15 (37.5%)
Series A11 (27.5%)
Seed7 (17.5%)
Series B5 (12.5%)
Series C2 (5.0%)

Stage Mix

Series Unknown 38%Series A 28%Seed 18%Series B 13%Series C 5%

Concentration shown as share of disclosed investments by stage.

Recent Investments

Jetcool Technologies logo

Jetcool Technologies

Congruity360 logo

Congruity360

Censinet logo

Censinet

Breezeway logo

Breezeway

Zippity logo

Zippity

Selux Diagnostics logo

Selux Diagnostics

Amplified Industries logo

Amplified Industries

Commonwealth Fusion Systems logo

Commonwealth Fusion Systems

MarginEdge logo

MarginEdge

Cullinan Oncology logo

Cullinan Oncology

Remedy Plan logo

Remedy Plan

SRS Medical Systems logo

SRS Medical Systems

Spotted logo

Spotted

eXIthera Pharmaceuticals logo

eXIthera Pharmaceuticals

MediaSilo logo

MediaSilo

4G Clinical logo

4G Clinical

Cartesian Therapeutics logo

Cartesian Therapeutics

Zixi logo

Zixi

Emerald Cloud Lab logo

Emerald Cloud Lab

Fashion Project logo

Fashion Project

Top10 Media logo

Top10 Media

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Schooner Capital - Classification

NAICS
  • 520000Finance and Insurance
  • 523000Securities, Commodity Contracts, and Other Financial Investments and Related Activities
  • 523900Other Financial Investment Activities
  • 523990All Other Financial Investment Activities
  • 523999Miscellaneous Financial Investment Activities
SIC
  • 6700Holding And Other Investment Offices
  • 6790Miscellaneous Investing
  • 6799Investors, Not Elsewhere Classified
Show 6 more industry codes
NAICS
  • 525000Funds, Trusts, and Other Financial Vehicles
  • 523910Miscellaneous Intermediation
  • 523940Portfolio Management and Investment Advice
SIC
  • 6000Depository Institutions
  • 6720Investment Offices
  • 6722Management Investment Offices, Open-end