# TESARO funding: rounds and investors > TESARO has raised $661M across 4 rounds since 2010. Investors include New Enterprise Associates, Kleiner Perkins Caufield & Byers and Kleiner Perkins. Source: https://millionrounds.com/company/tesaro (Millionrounds; every figure on the page links to its filing or article) United States · [Funded startup](https://millionrounds.com/companies) # Who invested in *TESARO* 4 rounds we have observed, with the 7 investors named in them. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it. Pharma Funding summary Updated 26 Oct 2026 **$661M** raised across 4 rounds since 2010, from 4 sources **$60M** Series A **$101M** Series B **$91M** Round **$409M** Round - **Latest round:** Round, $409M Jun 2016 - **Step-up i:** 4.5× - **Investors:** 7 See who backed them ## The funding story Each circle is a round, placed by date and sized by amount. The line above is the running total. 2010 2011 2012 2013 2014 2015 2016 **$60M** Series A **$101M** Series B **$91M** Round **$409M** Round - **First round:** Series A, $60M - **Biggest round:** $409M - **Usual gap between rounds:** 20 months ## The rounds - **Jun 2016** Round **$409M** *2 new* *1 returning* [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) [Deerfield](https://millionrounds.com/fund/deerfield) Source recorded SEC filing: $50M sold, first sale Apr 2016 - **Mar 2013** Round **$91M** No investor was named in the report. Reported by fiercebiotech.com - **Jun 2011** Series B **$101M** *4 new* *1 returning* [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) [Kleiner Perkins Caufield & Byers](https://millionrounds.com/fund/kleiner-perkins-caufield-and-byers) [InterWest Partners](https://millionrounds.com/fund/interwest-partners) [T. Rowe Price](https://millionrounds.com/fund/t-rowe-price) [Pappas Ventures](https://millionrounds.com/fund/pappas-ventures) Reported by finsmes.com SEC filing: $40M sold, first sale Jun 2011 - **May 2010** Series A **$60M** *1 new* [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) Reported by onbiovc.com SEC filing: $10M sold, first sale May 2010 ## Who was in which round The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led. **Series A** 2010 **Series B** 2011 **Round** 2013 **Round** 2016 [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) [Kleiner Perkins Caufield & Byers](https://millionrounds.com/fund/kleiner-perkins-caufield-and-byers) [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) [InterWest Partners](https://millionrounds.com/fund/interwest-partners) [Deerfield](https://millionrounds.com/fund/deerfield) [T. Rowe Price](https://millionrounds.com/fund/t-rowe-price) [Pappas Ventures](https://millionrounds.com/fund/pappas-ventures) ## The exit Exit Listing Price When IPO NASDAQ:TSRO undisclosed Mar 2012 From historical deal records. Wrong? [Tell us](https://millionrounds.com/corrections?slug=tesaro). ## Everyone who backed them [New Enterprise Associates](https://millionrounds.com/fund/new-enterprise-associates) VC firm **3** rounds [Kleiner Perkins Caufield & Byers](https://millionrounds.com/fund/kleiner-perkins-caufield-and-byers) VC firm **1** round [Kleiner Perkins](https://millionrounds.com/fund/kleiner-perkins) VC firm **1** round [InterWest Partners](https://millionrounds.com/fund/interwest-partners) VC firm **1** round [Deerfield](https://millionrounds.com/fund/deerfield) VC firm **1** round [T. Rowe Price](https://millionrounds.com/fund/t-rowe-price) Private equity **1** round [Pappas Ventures](https://millionrounds.com/fund/pappas-ventures) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=tesaro). ## Quick answers about TESARO ### Who invested in TESARO? TESARO's investors include New Enterprise Associates, Kleiner Perkins Caufield & Byers, Kleiner Perkins, InterWest Partners and Deerfield, and 2 more on record. ### How much has TESARO raised? TESARO has raised $661M across 4 rounds since 2010. ### When did TESARO last raise? TESARO's most recent round was an Undisclosed round of $409M in Jun 2016. ### What was TESARO's biggest round? Its most recent round, $409M in Jun 2016, is also its largest on record. ### Who backed TESARO first? TESARO's first round on record, in May 2010, was backed by New Enterprise Associates. ### What stage is TESARO at? TESARO's latest named round is an Undisclosed round, in Jun 2016. ### Where is TESARO based? TESARO is based in the United States. ## Companies like TESARO In the same sector, and raised in the last eighteen months. [**Matchpoint Therapeutics** $220M · Oct 2026](https://millionrounds.com/company/matchpoint-therapeutics)[**Rx Bandz** Oct 2026](https://millionrounds.com/company/rx-bandz)[**Hera Biotech** $1.8M · Sept 2026](https://millionrounds.com/company/hera-biotech)[**GevRx Nutraceuticals** $300K · Sept 2026](https://millionrounds.com/company/gevrx-nutraceuticals)[**RegCell** $81M · Sept 2026](https://millionrounds.com/company/regcell)[**ClearSight Therapeutics** $307K · Sept 2026](https://millionrounds.com/company/clearsight-therapeutics) ## Find investors like these Search every investor by what they have actually funded, then narrow to your stage and market. Free. Open the investor searchOr these rounds in the app