# Domain Associates' Biotech Investments: 33 Startups in Its Portfolio (2026) > The 33 Biotech startups Domain Associates has backed, by stage: $2.8B raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/domain-associates-biotech-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Series C and later 12 - [aTyr Pharma](https://millionrounds.com/company/atyr-pharma) - [*RB* Regado Biosciences](https://millionrounds.com/company/regado-biosciences) - [ReVision Optics](https://millionrounds.com/company/revision-optics) - [IntegenX](https://millionrounds.com/company/integenx) - [Aspen Neuroscience](https://millionrounds.com/company/aspen-neuroscience) - [Sera Prognostics](https://millionrounds.com/company/sera-prognostics) - [Truvian Sciences](https://millionrounds.com/company/truvian-sciences) - [CellBiosciences](https://millionrounds.com/company/cellbiosciences) - [*RM* ROX Medical](https://millionrounds.com/company/rox-medical) - [GenVault](https://millionrounds.com/company/genvault) - [*N* Novacea](https://millionrounds.com/company/novacea) - [Novalar Pharmaceuticals](https://millionrounds.com/company/novalar-pharmaceuticals) ## Stage not reported 8 - [Celladon](https://millionrounds.com/company/celladon) - [*S* Sebacia](https://millionrounds.com/company/sebacia) - [Somaxon Pharmaceuticals](https://millionrounds.com/company/somaxon-pharmaceuticals) - [Meritage Pharma](https://millionrounds.com/company/meritage-pharma) - [ChromaCode](https://millionrounds.com/company/chromacode) - [*ST* Sonexa Therapeutics](https://millionrounds.com/company/sonexa-therapeutics) - [*H* Helixis](https://millionrounds.com/company/helixis) - [*NB* Nina Biotherapeutics](https://millionrounds.com/company/nina-biotherapeutics) ## Series B 7 - [Milestone Pharmaceuticals](https://millionrounds.com/company/milestone-pharmaceuticals) - [Atara Biotherapeutics](https://millionrounds.com/company/atara-biotherapeutics) - [*X* Xagenic](https://millionrounds.com/company/xagenic) - [*AB* Axial Biotherapeutics](https://millionrounds.com/company/axial-biotherapeutics) - [NovaDigm Therapeutics](https://millionrounds.com/company/novadigm-therapeutics) - [*W* WindML](https://millionrounds.com/company/windml) - [*A* Adynxx](https://millionrounds.com/company/adynxx) ## Growth 3 - [Epic Sciences](https://millionrounds.com/company/epic-sciences) - [GI Dynamics](https://millionrounds.com/company/gi-dynamics) - [*FP* Five Prime Therapeutics](https://millionrounds.com/company/five-prime-therapeutics) ## Series A 3 - [*CT* CoDa Therapeutics](https://millionrounds.com/company/coda-therapeutics) - [Optherion](https://millionrounds.com/company/optherion) - [Sequel Pharmaceuticals](https://millionrounds.com/company/sequel-pharmaceuticals) ## Segment by segment ### Series C and later 12 startups · $1.3B raised - [**aTyr Pharma**](https://millionrounds.com/company/atyr-pharma) aTyr Pharma (Nasdaq: LIFE) is a biotherapeutics company engaged in the discovery and development of innovative medicines based on United States $181M - [*RB* **Regado Biosciences**](https://millionrounds.com/company/regado-biosciences) Regado Biosciences develops antithrombotic drug systems for acute and sub-acute cardiovascular and other indications. United States $177M - [**ReVision Optics**](https://millionrounds.com/company/revision-optics) ReVision Optics offers PRESBYLENS, a refractive surgery solution to correct vision loss by the natural aging process. United States $172M - [**IntegenX**](https://millionrounds.com/company/integenx) IntegenX designs, manufactures and markets automation systems facilitating reliable micro sample preparation and analysis. United States $161M - [**Aspen Neuroscience**](https://millionrounds.com/company/aspen-neuroscience) Aspen Neuroscience is a biotechnology company that specializes in personalized cell therapies. United States $122M - [**Sera Prognostics**](https://millionrounds.com/company/sera-prognostics) Sera Prognostics develops blood tests that are predictive of preterm birth, preeclampsia, and other pregnancy complications. United States $107M - [**Truvian Sciences**](https://millionrounds.com/company/truvian-sciences) Truvian Sciences develops an automated benchtop system to provide lab-accurate blood testing results. United States $101M - [**CellBiosciences**](https://millionrounds.com/company/cellbiosciences) ProteinSimple develops and commercializes proprietary systems and consumables for protein analyzis. United States $85M ### Stage not reported 8 startups · $532M raised - [**Celladon**](https://millionrounds.com/company/celladon) Celladon is a biotechnology company developing molecular therapies for the treatment of heart failure. United States $172M - [*S* **Sebacia**](https://millionrounds.com/company/sebacia) Sebacia is a commercial-stage dermatology company that develops an alternative to the topical and systemic drugs for the treatment of acne. United States $102M - [**Somaxon Pharmaceuticals**](https://millionrounds.com/company/somaxon-pharmaceuticals) Somaxon Pharmaceuticals is a growing specialty pharmaceutical company dedicated to commercializing proprietary branded prescriptio United States $94M - [**Meritage Pharma**](https://millionrounds.com/company/meritage-pharma) Meritage Pharma develops prescription products for the treatment of gastrointestinal and atopic diseases. United States $59M - [**ChromaCode**](https://millionrounds.com/company/chromacode) ChromaCode is a molecular diagnostics company focusing on bioinformatics. United States $44M - [*ST* **Sonexa Therapeutics**](https://millionrounds.com/company/sonexa-therapeutics) United States $41M - [*H* **Helixis**](https://millionrounds.com/company/helixis) Helixis, Inc. United States $17M - [*NB* **Nina Biotherapeutics**](https://millionrounds.com/company/nina-biotherapeutics) Nina Biotherapeutics develops therapies to combat cachexia in cancer patients. United States $3.5M ### Series B 7 startups · $391M raised - [**Milestone Pharmaceuticals**](https://millionrounds.com/company/milestone-pharmaceuticals) Milestone Pharmaceuticals is a drug development company developing small molecule therapeutics for the treatment of cardiovascular diseases. Canada $110M - [**Atara Biotherapeutics**](https://millionrounds.com/company/atara-biotherapeutics) Atara Biotherapeutics (Nasdaq: ATRA) is an off-the-shelf, allogeneic T-cell immunotherapy company. United States $69M - [*X* **Xagenic**](https://millionrounds.com/company/xagenic) Xagenic is a molecular diagnostics company developing on-demand molecular testing, facilitating faster treatment decisions for patients. Canada $67M - [*AB* **Axial Biotherapeutics**](https://millionrounds.com/company/axial-biotherapeutics) United States $54M - [**NovaDigm Therapeutics**](https://millionrounds.com/company/novadigm-therapeutics) NovaDigm Therapeutics develops vaccines that protect patients from contracting fungal and bacterial infections. United States $35M - [*W* **WindML**](https://millionrounds.com/company/windml) United States $33M - [*A* **Adynxx**](https://millionrounds.com/company/adynxx) United States $24M ### Growth 3 startups · $467M raised - [**Epic Sciences**](https://millionrounds.com/company/epic-sciences) Epic Sciences is a diagnostics company improving cancer management by providing real-time biopsy material to guide personalized medicine. United States $165M - [**GI Dynamics**](https://millionrounds.com/company/gi-dynamics) GI Dynamics is a medical device company developing therapies for the treatment of type 2 diabetes and related metabolic diseases. United States $156M - [*FP* **Five Prime Therapeutics**](https://millionrounds.com/company/five-prime-therapeutics) FivePrime is a clinical-stage biotechnology company that develops treatments for cancers. United States $146M ### Series A 3 startups · $145M raised - [*CT* **CoDa Therapeutics**](https://millionrounds.com/company/coda-therapeutics) United States $78M - [**Optherion**](https://millionrounds.com/company/optherion) Optherion, Inc., a biotechnology company, develops diagnostic and disease-modifying therapeutics for the management and treatment United States $42M - [**Sequel Pharmaceuticals**](https://millionrounds.com/company/sequel-pharmaceuticals) Sequel Pharmaceuticals develops and commercializes novel and clinical-stage drug candidates for patients with cardiovascular disease. United States $25M **How this map is made.** Every startup here works in Biotech and has raised money in a round we track that names Domain Associates as an investor. Each sits under the stage of its latest round. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Co-investors **Who invests with Domain Associates** 46 co-investors](https://millionrounds.com/portfolio-maps/domain-associates-co-investors)[Sector portfolio **Techstars' AI portfolio** 336 startups · $4.9B](https://millionrounds.com/portfolio-maps/techstars-ai-portfolio)[Sector portfolio **Alumni Ventures' AI portfolio** 302 startups · $36B](https://millionrounds.com/portfolio-maps/us-strategic-tech-fund-an-alumni-ventures-fund-ai-portfolio)[Sector portfolio **Andreessen Horowitz's AI portfolio** 259 startups · $426B](https://millionrounds.com/portfolio-maps/andreessen-horowitz-ai-portfolio)[Sector portfolio **General Catalyst's AI portfolio** 226 startups · $179B](https://millionrounds.com/portfolio-maps/general-catalyst-ai-portfolio)[Sector portfolio **Sequoia Capital's AI portfolio** 209 startups · $543B](https://millionrounds.com/portfolio-maps/sequoia-capital-ai-portfolio) ## Raising from investors like Domain Associates? Find the investors who back startups like yours, with their cheques, rounds and partners, in the app with filters, lists and exports. [Find investors](https://millionrounds.com/login?join=1&next=/app/investors)[Market maps](https://millionrounds.com/market-maps)