# Who Invests With Three Arch Partners: 20 Co-Investors (2026) > The 20 investors that have backed two or more of the same startups as Three Arch Partners, by kind: vc firms and growth funds. Most often Versant Ventures. Source: https://millionrounds.com/portfolio-maps/three-arch-partners-co-investors (Millionrounds; every figure on the page links to its filing or article) ## VC firms 16 - [Versant Ventures](https://millionrounds.com/fund/versant-ventures) - [Delphi Ventures](https://millionrounds.com/fund/delphi-ventures) - [Polaris Partners](https://millionrounds.com/fund/polaris-partners) - [InterWest Partners](https://millionrounds.com/fund/interwest-partners) - [*AM* Accuitive Medical Ventures](https://millionrounds.com/fund/accuitive-medical-ventures) - [ONSET Ventures](https://millionrounds.com/fund/onset-ventures) - [Alta Partners](https://millionrounds.com/fund/alta-partners) - [New Leaf Venture Partners](https://millionrounds.com/fund/new-leaf-venture-partners) - [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) - [Affinity Capital Management](https://millionrounds.com/fund/affinity-capital-management) - [Pinnacle Ventures](https://millionrounds.com/fund/pinnacle-ventures) - [Latterell Venture Partners](https://millionrounds.com/fund/latterell-venture-partners) - [Bay City Capital](https://millionrounds.com/fund/bay-city-capital) - [Skyline Ventures](https://millionrounds.com/fund/skyline-ventures) - [Prospect Venture Partners](https://millionrounds.com/fund/prospect-venture-partners) - [Sapient Fund](https://millionrounds.com/fund/sapient-fund) ## Growth funds 4 - [Sprout Group](https://millionrounds.com/fund/sprout-group) - [Investor Growth Capital Limited](https://millionrounds.com/fund/investor-growth-capital-limited) - [Medtronic](https://millionrounds.com/fund/medtronic) - [*CC* Cutlass Capital](https://millionrounds.com/fund/cutlass-capital) ## Segment by segment ### VC firms 16 investors - [**Versant Ventures**](https://millionrounds.com/fund/versant-ventures) VC firm United States 5 backed - [**Delphi Ventures**](https://millionrounds.com/fund/delphi-ventures) VC firm United States 4 backed - [**Polaris Partners**](https://millionrounds.com/fund/polaris-partners) VC firm United States 4 backed - [**InterWest Partners**](https://millionrounds.com/fund/interwest-partners) VC firm United States 4 backed - [*AM* **Accuitive Medical Ventures**](https://millionrounds.com/fund/accuitive-medical-ventures) VC firm United States 3 backed - [**ONSET Ventures**](https://millionrounds.com/fund/onset-ventures) VC firm United States 3 backed - [**Alta Partners**](https://millionrounds.com/fund/alta-partners) VC firm United States 3 backed - [**New Leaf Venture Partners**](https://millionrounds.com/fund/new-leaf-venture-partners) VC firm United States 3 backed ### Growth funds 4 investors - [**Sprout Group**](https://millionrounds.com/fund/sprout-group) Growth fund United States 4 backed - [**Investor Growth Capital Limited**](https://millionrounds.com/fund/investor-growth-capital-limited) Growth fund Sweden 2 backed - [**Medtronic**](https://millionrounds.com/fund/medtronic) Growth fund United States 2 backed - [*CC* **Cutlass Capital**](https://millionrounds.com/fund/cutlass-capital) Growth fund United States 2 backed **How this map is made.** Every investor here has backed two or more of the same startups as Three Arch Partners, in rounds we track. Grouped by kind, each ranked by how many startups it shares with Three Arch Partners. Rebuilt nightly; updated 15 November 2026. ## More portfolio maps [All portfolios](https://millionrounds.com/portfolio-maps) [Portfolio map **Three Arch Partners portfolio map** 23 startups ยท $1.0B](https://millionrounds.com/portfolio-maps/three-arch-partners-portfolio-map)[Co-investors **Who invests with Citibank** 247 co-investors](https://millionrounds.com/portfolio-maps/citi-co-investors)[Co-investors **Who invests with Bond** 101 co-investors](https://millionrounds.com/portfolio-maps/bond-co-investors)[Co-investors **Who invests with RTW Investments LLC** 47 co-investors](https://millionrounds.com/portfolio-maps/rtw-investments-lp-co-investors)[Co-investors **Who invests with S2G Investments** 42 co-investors](https://millionrounds.com/portfolio-maps/s2g-investments-co-investors)[Co-investors **Who invests with Spark** 31 co-investors](https://millionrounds.com/portfolio-maps/spark-3-co-investors) ## Raising from investors like Three Arch 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)