# Who Invests With Alta Partners: 20 Co-Investors (2026) > The 20 investors that have backed two or more of the same startups as Alta Partners, by kind: vc firms, growth funds and private equity and asset managers. Source: https://millionrounds.com/portfolio-maps/alta-partners-co-investors (Millionrounds; every figure on the page links to its filing or article) ## VC firms 12 - [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) - [Venrock](https://millionrounds.com/fund/venrock) - [Sofinnova Investments](https://millionrounds.com/fund/sofinnova-investments) - [Domain Associates](https://millionrounds.com/fund/domain-associates) - [Alta](https://millionrounds.com/fund/alta) - [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) - [*WI* Walden International](https://millionrounds.com/fund/walden-international) - [Versant Ventures](https://millionrounds.com/fund/versant-ventures) - [RiverVest](https://millionrounds.com/fund/rivervest-venture-partners) - [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) - [Polaris Partners](https://millionrounds.com/fund/polaris-partners) - [Johnson & Johnson Development Corporation (JJDC)](https://millionrounds.com/fund/johnson-and-johnson-development-corporation) ## Growth funds 4 - [*DN* De Novo Ventures](https://millionrounds.com/fund/de-novo-ventures) - [*TA* Three Arch Partners](https://millionrounds.com/fund/three-arch-partners) - [*NV* NIF Ventures](https://millionrounds.com/fund/nif-ventures) - [*HB* HBM BioVentures](https://millionrounds.com/fund/hbm-bioventures) ## Private equity and asset managers 4 - [Gimv](https://millionrounds.com/fund/gimv) - [Frazier Healthcare Partners](https://millionrounds.com/fund/frazier-healthcare-partners) - [RA Capital Management](https://millionrounds.com/fund/ra-capital-management) - [Advent International](https://millionrounds.com/fund/advent-international) ## Segment by segment ### VC firms 12 investors - [**New Enterprise Associates**](https://millionrounds.com/fund/new-enterprise-associates) VC firm United States 4 backed - [**Venrock**](https://millionrounds.com/fund/venrock) VC firm United States 3 backed - [**Sofinnova Investments**](https://millionrounds.com/fund/sofinnova-investments) VC firm United States 3 backed - [**Domain Associates**](https://millionrounds.com/fund/domain-associates) VC firm United States 2 backed - [**Alta**](https://millionrounds.com/fund/alta) VC firm - 2 backed - [**ARCH Venture Partners**](https://millionrounds.com/fund/arch-venture-partners) VC firm United States 2 backed - [*WI* **Walden International**](https://millionrounds.com/fund/walden-international) VC firm United States 2 backed - [**Versant Ventures**](https://millionrounds.com/fund/versant-ventures) VC firm United States 2 backed ### Growth funds 4 investors - [*DN* **De Novo Ventures**](https://millionrounds.com/fund/de-novo-ventures) Growth fund United States 3 backed - [*TA* **Three Arch Partners**](https://millionrounds.com/fund/three-arch-partners) Growth fund United States 3 backed - [*NV* **NIF Ventures**](https://millionrounds.com/fund/nif-ventures) Growth fund United States 3 backed - [*HB* **HBM BioVentures**](https://millionrounds.com/fund/hbm-bioventures) Growth fund - 2 backed ### Private equity and asset managers 4 investors - [**Gimv**](https://millionrounds.com/fund/gimv) Private equity Belgium 4 backed - [**Frazier Healthcare Partners**](https://millionrounds.com/fund/frazier-healthcare-partners) Private equity United States 2 backed - [**RA Capital Management**](https://millionrounds.com/fund/ra-capital-management) Private equity United States 2 backed - [**Advent International**](https://millionrounds.com/fund/advent-international) Private equity United States 2 backed **How this map is made.** Every investor here has backed two or more of the same startups as Alta Partners, in rounds we track. Grouped by kind, each ranked by how many startups it shares with Alta Partners. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Sector portfolio **Alta Partners' Biotech portfolio** 24 startups ยท $1.6B](https://millionrounds.com/portfolio-maps/alta-partners-biotech-portfolio)[Co-investors **Who invests with Techstars** 991 co-investors](https://millionrounds.com/portfolio-maps/techstars-co-investors)[Co-investors **Who invests with SV Angel** 988 co-investors](https://millionrounds.com/portfolio-maps/sv-angel-co-investors)[Co-investors **Who invests with Andreessen Horowitz** 977 co-investors](https://millionrounds.com/portfolio-maps/andreessen-horowitz-co-investors)[Co-investors **Who invests with Alumni Ventures** 911 co-investors](https://millionrounds.com/portfolio-maps/us-strategic-tech-fund-an-alumni-ventures-fund-co-investors)[Co-investors **Who invests with Sequoia Capital** 827 co-investors](https://millionrounds.com/portfolio-maps/sequoia-capital-co-investors) ## 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)