# Mission Bay Capital's Biotech Investments: 10 Startups in Its Portfolio (2026)

> The 10 Biotech startups Mission Bay Capital has backed, by stage: $1.4B raised between them. From the rounds we track; updated nightly.

Source: https://millionrounds.com/portfolio-maps/mission-bay-capital-biotech-portfolio (Millionrounds; every figure on the page links to its filing or article)

## Series C and later

8

- [*A* Atreca](https://millionrounds.com/company/atreca)
- [Alector](https://millionrounds.com/company/alector)
- [Circle Pharma](https://millionrounds.com/company/circle-pharma)
- [Glycomine](https://millionrounds.com/company/glycomine)
- [*ST* SiteOne Therapeutics](https://millionrounds.com/company/siteone-therapeutics)
- [Calithera Biosciences](https://millionrounds.com/company/calithera-biosciences)
- [Effector Therapeutics](https://millionrounds.com/company/effector-therapeutics)
- [Vivace Therapeutics](https://millionrounds.com/company/vivace-therapeutics)

## Series B

2

- [*P* Pionyr](https://millionrounds.com/company/pionyr)
- [Redwood Bioscience](https://millionrounds.com/company/redwood-bioscience)

## Segment by segment

### Series C and later

8 startups · $1.3B raised

- [*A* **Atreca**](https://millionrounds.com/company/atreca) Atreca develops a technology to identify the set of antibodies produced during an immune response, without prior knowledge of an antigen. United States $313M
- [**Alector**](https://millionrounds.com/company/alector) Alector is a biopharmaceutical company that develops therapies for the treatment of neurodegeneration diseases. United States $215M
- [**Circle Pharma**](https://millionrounds.com/company/circle-pharma) Circle Pharma is a provider of a macrocycle development platform intended to provide macrocyclic peptides. United States $187M
- [**Glycomine**](https://millionrounds.com/company/glycomine) Glycomine is an early-stage biotech working on replacement therapies for rare diseases. United States $160M
- [*ST* **SiteOne Therapeutics**](https://millionrounds.com/company/siteone-therapeutics) United States $119M
- [**Calithera Biosciences**](https://millionrounds.com/company/calithera-biosciences) Calithera Biosciences is a pharmaceutical company developing novel small molecule therapeutics for the treatment of cancer. United States $115M
- [**Effector Therapeutics**](https://millionrounds.com/company/effector-therapeutics) Effector Therapeutics is an early-stage company focused on the discovery and development of small molecule cancer therapeutics. United States $99M
- [**Vivace Therapeutics**](https://millionrounds.com/company/vivace-therapeutics) Vivace Therapeutics is a venture-backed start-up dedicated to discovering and developing cancer therapeutics by targeting a novel pathway. United States $75M

### Series B

2 startups · $74M raised

- [*P* **Pionyr**](https://millionrounds.com/company/pionyr) United States $62M
- [**Redwood Bioscience**](https://millionrounds.com/company/redwood-bioscience) Redwood Bioscience is utilizing precision protein-chemical engineering to develop optimized and novel biotherapeutics. United States $12M

**How this map is made.** Every startup here works in Biotech and has raised money in a round we track that names Mission Bay Capital 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)

[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)[Sector portfolio **Khosla Ventures' AI portfolio** 176 startups · $251B](https://millionrounds.com/portfolio-maps/khosla-ventures-ai-portfolio)

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