/Investor DB

Polaris Partners — 2025 Investments

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

Auron Therapeuticsaurontherapeutics.comSeries A · Dec 2025 · $48M

BiotechNewton, US

Katharine Yen(Executive Officer, Director)Kate Yen(Founder)inChristopher Guiffre(Executive Officer)

BoardAlon Lazarus(Director)Anna French(Director)in

Board seatAlexandra Cantley· per SEC Form D

Co-investorsDCVC (Data Collective)Qiming Venture Partners USAApollo Health VenturesBrightEdgeDCVC BioQiming Venture Partners

Cirrus Therapeuticscirrustx.cominAug 2025SEC filingmedium confidence

Cirrus Therapeutics is a biotech developing gene and cell therapies based on ocular immunology to treat dry age-related macular degeneration (AMD), including an AAV gene therapy to restore the IRAK-M immune regulator and a next-generation retinal pigment epithelium (RPE) cell therapy for advanced geographic atrophy.

BiotechHealthtechLongevityCambridge, US

Ying Kai Chan(Co-founder & CEO)inAndrew Dick(Director, Promoter)

BoardKhoo Shih(Director)

Board seatAlexandra Cantley· per SEC Form D · $15.7M raise · filed Aug 2025

Co-investorsClavystBioLong GameZAKA VC

Crossbow Therapeuticscrossbowtx.cominSep 2025SEC filingmedium confidence

Crossbow Therapeutics develops TCR-mimetic antibody therapies designed to target cancer antigens by mimicking T-cell receptors, with a focus on treating solid tumors and hematologic malignancies.

AI & Machine LearningBiotechMedical DevicesCambridge, US

Alexander Nolte(Executive Officer)inDmitri Wiederschain(Executive Officer)in

BoardSakae Asanuma(Director)inBriggs Morrison(Executive Officer, Director, Promoter)inIrena Melnikova(Director)in

Board seatAlexandra Cantley· per SEC Form D · $80M raise · filed Sep 2025

Co-investorsLifelinkMPM BioImpactPfizer Venture InvestmentsBiotechnology Value FundMirae Asset Venture InvestmentPfizer Ventures+1 more

Nomad Healthnomadhealth.cominSeries B · Dec 2025 · $12M

Nomad Health operates an online marketplace that matches travel nurses and allied health clinicians with temporary healthcare jobs based on their profiles and preferences.

Digital HealthHealthtechMarketplacesNew York, US

Maxwell Laurans(Director)Alexi Nazem(Co-Founder & Board Member)inAlexander Nazem, MD(Founder)Max Laurens, MD(Founder)Ryan Grant, MD(Founder)inJustin Lambert(CEO)in

Board seatBrian Chee· per SEC Form D

Co-investorsAlleyCorpFirst Round CapitalIcon VenturesRRE Ventures.406 VenturesAdams Street Partners+1 more

Quralisquralis.comin𝕏Sep 2025SEC filingmedium confidence

QurAlis develops precision therapies for amyotrophic lateral sclerosis (ALS) and related neurodegenerative diseases by targeting specific disease-causing genetic drivers and molecular mechanisms.

BiotechDeep TechMedical DevicesCambridge, US

Kevin Eggan(Founder, QurAlis; Group Vice President, Head of Research and Early Development, BioMarin Pharmaceutical)inRoet(Co-founder)Woolf(Co-founder)Kasper Roet(Founder, Chief Executive Officer)inShafique Virani(Executive Officer)inJason Brown(Mr. Brown is the Chief Financial Officer of the Issuer.)in

Board seatAmy Schulman· per SEC Form D · $24.9M raise · filed Sep 2025

Co-investorsALS Investment FundDolby Family VenturesDroia VenturesInkefMC Healthcare VenturesMission Biocapital+8 more

FIRE1fire1foundry.comin𝕏Series B · Jan 2025 · $120M

FIRE1 develops NORM, an implantable sensor placed in the inferior vena cava to directly measure fluid volume in heart failure patients, paired with a self-management platform to help patients engage with their own care.

Digital HealthHardwareMedical DevicesDublin, IE

Co-investorsAndera PartnersGimvIreland Strategic Investment FundLightstone VenturesLongitude CapitalNew Enterprise Associates (NEA)+5 more

Soufflé Therapeuticssouffletx.cominSeries A · Jan 2025 · $200M

Soufflé Therapeutics develops nucleic acid medicines that precisely target and deliver genetic therapeutics to specific cell types to treat disease.

AI & Machine LearningBiotechDeep TechWatertown, US

Victor Kotelianski(Founder)Daniel Anderson(Founder and Director)Robert Langer(Founder)Marino Zerial(Founder)Brad Pentelute(Founder)Amir Nashat, ScD(Founder, Director and CEO)

Co-investorsLeaps by BayerBessemer Venture PartnersSafar PartnersVida Ventures

Zag Biozagbio.comSeries A · Oct 2025 · $80M

Zag Bio develops thymus-targeted bifunctional antibodies designed to induce central tolerance for treating autoimmune diseases.

BiotechDeep TechHealthtechMedical DevicesCambridge, US

Alan Crane(Founder)Diane Mathis(Founder)Joanne Lim(Co-founder)Dr. Diane Mathis(Founder)Jo Viney(Founder)John Kulman(Founder)

Co-investorsLightspeed Venture PartnersMission BiocapitalPear VCSanofi VenturesThe Engine Ventures

Other

Tracked investments with no reachable website or further public details — typically companies that wound down, renamed, or were absorbed.

Sequelae

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