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Schooner Capital

Crossover fund

Boston · Seed–Late Stage · 17 people tracked

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Investment thesis

Schooner Capital operates from a permanent, evergreen capital base, investing in both private companies and public securities. It looks across sector, stage and geography, emphasizing independent judgment and contrarian thinking. With a patient approach developed over 55 years, the firm often invests multiple times in its holdings and favors deep, long-term partnerships with strong teams. Its evergreen structure and entrepreneurial roots let it respond to opportunities without mandate constraints or fundraising pressures. Profits support The Schooner Foundation, which is engaged in human rights causes globally.

Invests inSector AgnosticBostonGlobal

Source: firm website, verified Aug 3, 2026.

Stage
Seed–Late Stage
HQ
Boston, US
Instruments
Equity
Founded
1971
Tracked investments
32

Team · 17 people

from the firm's website

What they invest in

from 7 of 32 portfolio companies

Biotech ×3AI & Machine Learning ×2Data & Infrastructure ×2Deep Tech ×2Cleantech ×1Climate Tech ×1Cloud Computing ×1Digital Health ×1

HQs:United States×7Ireland×1

Investments · 32 tracked

founders shown can be your intro path
Cartesian Therapeutics (NASDAQ: RNAC)cartesiantherapeutics.comin𝕏NASDAQ: RNAC

Cartesian Therapeutics develops mRNA-based cell therapies for autoimmune diseases.

BiotechHealthtechWatertown, US

Metin Kurtoglu(Executive Officer)Chris Jewell(Executive Officer)Carsten Brunn(Executive Officer, Director)Emily English(Executive Officer)Blaine Davis(Executive Officer)Stephen Smolinksi(Executive Officer)

4G Clinicalin

Dover, US

David Kelleher(Executive Officer)Edward Tourtellotte(Executive Officer)

Amplifiedamplified.industriesin𝕏
Bentobento.netin
Bestdoctorsbestdoctors.comin𝕏
Breezewaybreezeway.io
Brixtonbiobrixtonbio.com
Capitalprovisionscapitalprovisions.com
Carecubescarecubes.comin
Censinetcensinet.comin
Commonwealth Fusion Systemscfs.energyin𝕏

Commonwealth Fusion Systems develops commercial fusion power plants using high-temperature superconducting magnet technology to provide grid-scale energy.

CleantechClimate TechDeep TechEnergyUnknown, US

Brandon Sorbom(Founder)Robert Mumgaard(Executive Officer, Director)Daniel Brunner(Executive Officer)Massimiliano Pieri(Director)Katie Rae(Director)Alan Eustace(Director)

Congruity360congruity360.comin

Congruity360 provides unstructured data management and governance software for enterprises managing large, dispersed datasets across multiple storage systems.

AI & Machine LearningCloud ComputingData & InfrastructureEnterprise SoftwareFall River, US

Cullinan Oncologycullinanoncology.comin𝕏

Cullinan Therapeutics develops clinical-stage T cell engager therapies targeting autoimmune diseases and cancer, leveraging immune modulation expertise to advance high-impact therapeutic candidates.

BiotechDigital Health

Emerald Cloud Labemeraldcloudlab.com
Kewazokewazo.comin
Mannamanna.aero

Manna operates an air delivery service using drone technology to deliver medical equipment, food, and other goods, with plans to reduce traffic and improve air quality in urban areas.

Deep TechLogistics & Supply ChainMobility & Transportation

MarginEdgemarginedge.comin𝕏

Arlington, US

John Corso(Director)Clyde Davis(Executive Officer, Director)Roy Phillips(Executive Officer, Director)Patrick O'Reilly(Director)Pawan Malhotra(Director)Timothy P O'Reilly(Director)

Mediasilomediasilo.comin𝕏

PartnerTed Henderson· led

Meilimeili.travel
Millstonemedicalmillstonemedical.com
Mimetogenmimetogen.com
Onebeatonebeat.coin𝕏
Ottometricottometric.comin

Ottometric provides a cloud-based data platform for developing driver-assistance and autonomous vehicle systems, automating validation workflows and transforming test data into actionable insights for automotive OEMs and suppliers.

AI & Machine LearningData & InfrastructureSaaSWaltham, US

Joseph Burke(Executive Officer, Director)inRich Redelfs(Director)inJohn Curran(Executive Officer)Nick Pandher(Executive Officer)

BoardOrhan Gazelle(Director)Zenas Hutcheson(Director)

Railcommrailcomm.comin𝕏

PartnerPeter Binas· led

Remedy Planin

BiotechRockville, US

Gregory Plan Crimmins(Executive Officer, Director)

Seventhgenerationseventhgeneration.com
Spottedriskspottedrisk.comin
Srsmedicalsrsmedical.com
Wavebreaktxwavebreaktx.comin
Zixizixi.comin𝕏

PartnerTed Henderson· led

Frequently asked questions

What stage does Schooner Capital invest at?
Schooner Capital invests at the Seed, Late Stage stages.
What sectors does Schooner Capital focus on?
Schooner Capital focuses on Sector Agnostic.
Where is Schooner Capital located?
Schooner Capital is headquartered in Boston, US.

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