Fundraising Fox

B4 Capital β€” 2025 Investments

6 investments dated 2025 Β· listed companies and verified rows first Β· show all

Capital Rx, Inc.Sep 2025SEC filingmedium confidence

New York, US

Board seatRobert MittendorffΒ· per SEC Form D Β· $232.9M raise Β· filed Sep 2025

Co-investorsEdison PartnersGeneral CatalystTRANSFORMATION CAPITAL

Healthcare North America Growth Stagecarlsmed.comFeb 2025

Carlsmed develops the aprevo personalized surgery platform for spine fusion procedures, producing patient-specific implants and technology used by spine surgeons.

AI & Machine LearningBiotechHardwareHealthtechMedical DevicesCarlsbad, US

Mike Cordonnier(Co-Founder, President & CEO)Michael Cordonnier(Executive Officer, Director)Niall Casey(Co-Founder & Chief Intellectual Property Officer)Shariq Hussain(Chief Technology Officer)Alexander Arrow(Executive Officer)Sharon Schulzki(Chief Clinical & Market Access Officer)

Board seatRobert MittendorffΒ· per SEC Form D

Co-investorsB Capital GroupUS Venture PartnersWavemaker Three-Sixty Health

Positive Developmentpositivedevelopment.comin𝕏Jan 2025

Positive Development provides autism therapy and developmental care services for neurodivergent children and their families.

Digital HealthHealthtechMedical DevicesMental HealthMclean, US

Mike Suiters(Executive Officer, Director)Nick Whitehead(Director)

BoardDaniel Gebremedhin(Director)John Banta(Director)Brenton Fargnoli(Director)in

Board seatAdam SeabrookNick WhiteheadΒ· per SEC Form D

Co-investorsAlleyCorpB Capital GroupFlare Capital PartnersLifeforce CapitalObvious VenturesAlley Robotics Ventures+2 more

Solve Therapeutics, Inc.Nov 2025SEC filingmedium confidence

BiotechBelmont, US

Langdon Miller(Executive Officer)David Johnson(Executive Officer, Director)Clayton D. Knox(Executive Officer)

BoardPeter Colabuono(Director)Alan Colowick(Director)Jason Pitts(Director)

Board seatRobert MittendorffΒ· per SEC Form D Β· $120.5M raise Β· filed Nov 2025

Volastravolastratx.comin𝕏Sep 2025

Volastra Therapeutics is a drug discovery and development company working on novel cancer therapies.

BiotechHealthtechNew York, US

Samuel Bakhoum(Co-Founder & Chief Scientific Officer)Lewis Cantley(Founder and Chair of Scientific Advisory Committee)Olivier Elemento(Founder and Scientific Advisor)David P. Southwell(Chief Executive Officer)David Southwell(Executive Officer, Director)

Board seatRobert MittendorffΒ· per SEC Form D

Co-investorsDroia VenturesARCH Venture PartnersB Capital GroupVida Ventures

Knox Systemsknoxsystems.cominJun 2025

Knox Systems helps software companies navigate FedRAMP compliance and secure federal government contracts.

Cloud ComputingCybersecurityGovTechSaaSAustin, US

Irina Denisenko(Executive Officer, Director)William Christopher Johnson(Executive Officer, Director)

BoardViviana Faga(Director)inCarrie Lee(Federal Advisor)David Epperson(Federal Advisor)Chad Tetrault(Federal Advisor)

Co-investorsB Capital GroupFelicis VenturesM12 (Microsoft's Venture Fund)B CapitalBenchstrength PartnersFirsthandVC+2 more

Rows marked β€œSEC filing” are inferred from directors named on the company's SEC Form D β€” public regulatory data, not a portfolio list published by the firm.