# Alta Partners' Biotech Investments: 24 Startups in Its Portfolio (2026) > The 24 Biotech startups Alta Partners has backed, by stage: $1.6B raised between them. From the rounds we track; updated nightly. Source: https://millionrounds.com/portfolio-maps/alta-partners-biotech-portfolio (Millionrounds; every figure on the page links to its filing or article) ## Series B 8 - [SARcode Bioscience](https://millionrounds.com/company/sarcode-bioscience) - [Lumena Pharmaceuticals](https://millionrounds.com/company/lumena-pharmaceuticals) - [Plexxikon](https://millionrounds.com/company/plexxikon) - [Arrow Therapeutics](https://millionrounds.com/company/arrow-therapeutics) - [Renovis](https://millionrounds.com/company/renovis) - [*SS* Sierra Surgical](https://millionrounds.com/company/sierra-surgical) - [*VB* Vitra Bioscience](https://millionrounds.com/company/vitra-bioscience) - [PamGene](https://millionrounds.com/company/pamgene) ## Series C and later 8 - [*E* eGenesis](https://millionrounds.com/company/egenesis) - [aTyr Pharma](https://millionrounds.com/company/atyr-pharma) - [*CP* Calistoga Pharmaceuticals](https://millionrounds.com/company/calistoga-pharmaceuticals) - [*A* Agensys](https://millionrounds.com/company/agensys) - [Ceregene](https://millionrounds.com/company/ceregene) - [Pathwork Diagnostics](https://millionrounds.com/company/pathwork-diagnostics) - [*TT* TorreyPines Therapeutics](https://millionrounds.com/company/torreypines-therapeutics) - [Prolacta Bioscience](https://millionrounds.com/company/prolacta-bioscience) ## Stage not reported 6 - [*V* VertiFlex](https://millionrounds.com/company/vertiflex) - [*ID* Immune Design](https://millionrounds.com/company/immune-design) - [*N* NeurogesX](https://millionrounds.com/company/neurogesx) - [*ST* Sonexa Therapeutics](https://millionrounds.com/company/sonexa-therapeutics) - [*A* Anesiva](https://millionrounds.com/company/anesiva) - [*NP* NeuroGenetic Pharmaceuticals](https://millionrounds.com/company/neurogenetic-pharmaceuticals) ## Series A 2 - [*AT* Arete Therapeutics](https://millionrounds.com/company/arete-therapeutics) - [OPAL Therapeutics](https://millionrounds.com/company/opal-therapeutics) ## Segment by segment ### Series B 8 startups · $311M raised - [**SARcode Bioscience**](https://millionrounds.com/company/sarcode-bioscience) SARcode Bioscience develops an antigen for the treatment of unmet medical needs in ophthalmology, dermatology and inflammatory diseases. United States $98M - [**Lumena Pharmaceuticals**](https://millionrounds.com/company/lumena-pharmaceuticals) Lumena Pharmaceuticals develops oral therapeutics for rare liver diseases to improve liver function and relieve disease symptoms. United States $71M - [**Plexxikon**](https://millionrounds.com/company/plexxikon) Plexxikon is a engages in the discovery and development of small molecule pharmaceuticals to treat human disease. United States $46M - [**Arrow Therapeutics**](https://millionrounds.com/company/arrow-therapeutics) Arrow is a small pharmaceutical company strictly focussed on novel anti-infective discovery. United Kingdom $35M - [**Renovis**](https://millionrounds.com/company/renovis) Renovis,is a biopharmaceutical company developing drugs to treat neurological diseases and disorders. United States $34M - [*SS* **Sierra Surgical**](https://millionrounds.com/company/sierra-surgical) Sieraa Surgical develops minimally-invasive surgical systems based on female sterilization technologies. United States $22M - [*VB* **Vitra Bioscience**](https://millionrounds.com/company/vitra-bioscience) Vitra Bioscience Inc., a Mountain View, Calif.-based developer of technologies for parallel drug discovery. United States $5.5M - [**PamGene**](https://millionrounds.com/company/pamgene) PamGene is an European biotechnology company. Netherlands $11 ### Series C and later 8 startups · $894M raised - [*E* **eGenesis**](https://millionrounds.com/company/egenesis) United States $329M - [**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 - [*CP* **Calistoga Pharmaceuticals**](https://millionrounds.com/company/calistoga-pharmaceuticals) Calistoga Pharmaceuticals develops therapeutic oral medicines for patients suffering from cancer and inflammatory diseases. United States $97M - [*A* **Agensys**](https://millionrounds.com/company/agensys) Agensys offers products to treat various tumors as well as prostate, pancreatic and bladder cancers. United States $84M - [**Ceregene**](https://millionrounds.com/company/ceregene) Ceregene is a biotechnology company that treats neurodegenerative disorders using the delivery of nervous system growth factors. United States $72M - [**Pathwork Diagnostics**](https://millionrounds.com/company/pathwork-diagnostics) Pathwork Diagnostics develops and delivers molecular diagnostic solutions for oncology. United States $64M - [*TT* **TorreyPines Therapeutics**](https://millionrounds.com/company/torreypines-therapeutics) TorreyPines Therapeutics engages in the discovery and development of small molecule compounds in the United States. - $35M - [**Prolacta Bioscience**](https://millionrounds.com/company/prolacta-bioscience) Prolacta Bioscience Inc. United States $34M ### Stage not reported 6 startups · $383M raised - [*V* **VertiFlex**](https://millionrounds.com/company/vertiflex) United States $107M - [*ID* **Immune Design**](https://millionrounds.com/company/immune-design) Immune Design develops vaccines and therapeutics for the prevention and treatment of infectious diseases. United States $99M - [*N* **NeurogesX**](https://millionrounds.com/company/neurogesx) NeurogesX develops and commercializes therapies for chronic peripheral neuropathic pain. United States $92M - [*ST* **Sonexa Therapeutics**](https://millionrounds.com/company/sonexa-therapeutics) United States $41M - [*A* **Anesiva**](https://millionrounds.com/company/anesiva) Anesiva is a late-stage biopharmaceutical company that seeks to be the leader in the development and commercialization of novel ph United States $30M - [*NP* **NeuroGenetic Pharmaceuticals**](https://millionrounds.com/company/neurogenetic-pharmaceuticals) Neurogenetic Pharmaceuticals is engaged in the R&D of therapeutics for neurodegenerative disorders such as Alzheimer’s disease. United States $14M ### Series A 2 startups · $35M raised - [*AT* **Arete Therapeutics**](https://millionrounds.com/company/arete-therapeutics) Arete Therapeutics is a pharmaceutical company that develops small molecule therapeutics for diabetes and cardiovascular disease. United States $35M - [**OPAL Therapeutics**](https://millionrounds.com/company/opal-therapeutics) Lab-grown uterine models from real patient samples to de-risk drug discovery in endometriosis and fibroids United States $275K **How this map is made.** Every startup here works in Biotech and has raised money in a round we track that names Alta Partners 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 Alta Partners** 20 co-investors](https://millionrounds.com/portfolio-maps/alta-partners-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 Alta Partners? 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)