Fundraising Fox

Rock Springs Capital β€” Full Portfolio

9 tracked investments Β· listed companies and verified rows first

Avalyn Pharma Incavalynpharma.cominNASDAQ: AVLNSep 2023 Β· $175M

Avalyn Pharma develops inhaled therapies for pulmonary fibrosis, using a nebulization approach that delivers treatment directly to the lungs to reduce the tolerability problems of existing oral therapies.

BiotechHealthtech

Lyn Baranowski(CEO)in

Co-investorsAndera PartnersCatalio Capital Management, LPF-Prime CapitalInVivium CapitalNorwest Venture PartnersRiverVest Venture Partners+7 more

Xilio Therapeuticsxiliotx.cominNASDAQ: XLO

Xilio Therapeutics is a clinical-stage biotechnology company developing masked immuno-oncology therapies that use protein engineering to remain inactive until activated by tumor-specific proteases within the tumor microenvironment.

BiotechHealthtechWaltham, US

Rene Russo(Executive Officer, Director)inJoseph Farmer(Executive Officer)Timothy Clackson(Executive Officer)Paul Clancy(Director)Daniel Curran(Director)Nancy Hong(Director)

Co-investorsBain Capital Life SciencesBay City CapitalF-Prime CapitalM VenturesMRL Ventures FundRA Capital+4 more

Apollo Therapeuticsapollotherapeutics.cominβœ“ verified

Apollo Therapeutics is a portfolio biopharmaceutical company that translates academic biology and medical research into new medicines, operating over 20 therapeutic programs including six in clinical development.

BiotechHealthtechCambridge, GB

Co-investorsPatient Square CapitalAlbionVCUCL Technology Fund

Apollo Therapeuticsapollotx.cominSep 2023 Β· $226.5Mβœ“ verified

Apollo Therapeutics is a biopharmaceutical company that translates academic biology and medical research into new medicines, operating a portfolio of over 20 therapeutic programs with several in clinical development.

BiotechCambridge, GB

Co-investorsPatient Square CapitalAlbionVC

Abcuroabcuro.comAug 2026

Abcuro develops therapies that target highly cytotoxic T cells for autoimmune diseases, including its lead candidate ulviprubart for inclusion body myositis.

BiotechHealthtechNewton, US

Steven A. Greenberg(Chief Scientific Advisor & Co-Founder)Steven A. Greenberg, MD(Chief Scientific Advisor & Co-Founder)John Alexander Martin(Executive Officer, Director)Stefano Gulla(Executive Officer)Evan Thompson(Executive Officer)David de Graaf(Executive Officer, Director)

Co-investorsBain Capital Life SciencesNew Enterprise Associates (NEA)RA CapitalSamsara BioCapitalSanofi VenturesMass General Brigham Ventures+8 more

City Therapeuticscitytx.comin𝕏Oct 2024

City Therapeutics develops RNAi-based medicines targeting rare, specialty, and prevalent diseases using engineered trigger molecules and precision delivery ligands.

BiotechMedical DevicesCambridge, US

Mark Keating, MD(Co-founder)Kotaro Nakanishi, PhD(Co-founder)Yukihide Tomari, PhD(Co-founder)Phillip Zamore, PhD(Co-founder)

Co-investorsAN Venture PartnersARCH Venture PartnersSofinnova VenturesCasdin CapitalFidelity InvestmentsInvus

Homology Medicineshomologymedicines.com

Clinical-stage genetic medicines company using human-derived AAV vectors and nuclease-free gene editing for rare diseases.

BiotechBedford, US

Siyamak Rasty(Executive Officer)Albert Seymour(Executive Officer)

BoardSteven Gillis(Director)Arthur Tzianabos(Executive Officer, Director)Kush Parmar(Director)inRichard Gregory(Director)

Co-investors5AM VenturesARCH Venture PartnersOUP (Osage University Partners)AlexandriaDeerfield Management CompanyHBM Healthcare Investments+4 more

Synthekinesynthekine.comin𝕏

Synthekine is a clinical-stage biotechnology company using protein engineering platforms to develop cytokine-based immunotherapies designed to preserve therapeutic efficacy while avoiding toxicities linked to cytokine pleiotropy.

BiotechHealthtech

K. Christopher Garcia(Founder)Susan Molineaux(CEO)Martin Oft(Chief Scientific Officer)Naiyer Rizvi(Chief Medical Officer)Gregory(Chief Technical Officer)Geoff(Chief Business Officer)

Co-investorsSamsara BioCapitalThe Column GroupBain Capital Life SciencesCanaan PartnersRA CapitalTCG Crossover+2 more

Treeline Biosciencestreeline.bioSep 2025

Treeline develops therapeutics focused on oncology, leveraging insights from clinical practice and laboratory research.

AI & Machine LearningBiotechMedical DevicesWatertown, US

Joshua H. Bilenker(Executive Officer, Director, Promoter)Jeffrey Engelman(Executive Officer, Director, Promoter)inJosh Bilenker(Founder)in

BoardKristina Burow(Director)inAli Satvat(Director)David Schenkein(Director)in

Co-investorsAisling CapitalARCH Venture PartnersOrbiMedCasdin CapitalFidelity InvestmentsGV (Google Ventures)+1 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.