# Syros Pharmaceuticals funding: rounds and investors > Syros Pharmaceuticals has raised $128M across 3 rounds since 2013. Investors include ARCH Venture Partners, Redmile Group and Polaris Partners. Source: https://millionrounds.com/company/syros-pharmaceuticals (Millionrounds; every figure on the page links to its filing or article) United States · [Funded startup](https://millionrounds.com/companies) # Who invested in *Syros Pharmaceuticals* 3 rounds we have observed, with the 9 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. Biotech Funding summary Updated 26 Oct 2026 **$128M** raised across 3 rounds since 2013, from 3 sources **$30M** Series A **$53M** Series B **$45M** Round - **Latest round:** Round, $45M Dec 2023 - **Biggest round:** $53M Series B · Oct 2014 - **Investors:** 9 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. 2013 2015 2017 2019 2021 2023 **$30M** Series A **$53M** Series B **$45M** Round - **First round:** Series A, $30M - **Biggest round:** $53M - **Usual gap between rounds:** 9.1 years ## The rounds - **Dec 2023** Round **$45M** *2 new* *2 returning* [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [Redmile Group](https://millionrounds.com/fund/redmile-group) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) [Blue Owl](https://millionrounds.com/fund/blue-owl) Source recorded - **Oct 2014** Series B **$53M** *5 new* *1 returning* [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [Redmile Group](https://millionrounds.com/fund/redmile-group) [Alexandria Real Estate Equities](https://millionrounds.com/fund/alexandria) [Flagship Ventures](https://millionrounds.com/fund/flagship-ventures) [Aisling Capital](https://millionrounds.com/fund/aisling-capital) From a historical funding record SEC filing: $53M sold, first sale Oct 2014 - **Apr 2013** Series A **$30M** *2 new* [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [Flagship Pioneering, LLC](https://millionrounds.com/fund/flagship-pioneering-llc) Reported by syros.com SEC filing: $10M sold, first sale Apr 2013 ## Founders and team From the SEC filings it signed: 6 on the team. - **Conely C. Chee** Executive Officer i - **David C. Roth** Executive Officer i - **Eric C. Olson** Executive Officer i - **Jason C. Haas** Executive Officer i - **Kristin C. Stephens** Executive Officer i - **Nancy Simonian** Executive Officer, Director i On the board, as filed i *Andrew C. Oh* *Deborah Dunsire* *Mark Alles* *Marsha A. Fanucci* *Peter Wirth* *Richard A. Young* *Srinivas Akkaraju* *Sue Gail Eckhardt* *Timothy C. Tyson* ## 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** 2013 **Series B** 2014 **Round** 2023 [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) [Redmile Group](https://millionrounds.com/fund/redmile-group) [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [Alexandria Real Estate Equities](https://millionrounds.com/fund/alexandria) [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) [Flagship Pioneering, LLC](https://millionrounds.com/fund/flagship-pioneering-llc) [Blue Owl](https://millionrounds.com/fund/blue-owl) [Flagship Ventures](https://millionrounds.com/fund/flagship-ventures) [Aisling Capital](https://millionrounds.com/fund/aisling-capital) ## Everyone who backed them [ARCH Venture Partners](https://millionrounds.com/fund/arch-venture-partners) VC firm **3** rounds [Redmile Group](https://millionrounds.com/fund/redmile-group) VC firm **2** rounds [Polaris Partners](https://millionrounds.com/fund/polaris-partners) VC firm **1** round [Alexandria Real Estate Equities](https://millionrounds.com/fund/alexandria) VC firm **1** round [Samsara BioCapital](https://millionrounds.com/fund/samsara-biocapital) VC firm **1** round [Flagship Pioneering, LLC](https://millionrounds.com/fund/flagship-pioneering-llc) VC firm **1** round [Blue Owl](https://millionrounds.com/fund/blue-owl) Asset manager **1** round [Flagship Ventures](https://millionrounds.com/fund/flagship-ventures) Accelerator **1** round [Aisling Capital](https://millionrounds.com/fund/aisling-capital) Private equity **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=syros-pharmaceuticals). ## Quick answers about Syros Pharmaceuticals ### Who invested in Syros Pharmaceuticals? Syros Pharmaceuticals's investors include ARCH Venture Partners, Redmile Group, Polaris Partners, Alexandria Real Estate Equities and Samsara BioCapital, and 4 more on record. ### How much has Syros Pharmaceuticals raised? Syros Pharmaceuticals has raised $128M across 3 rounds since 2013. ### When did Syros Pharmaceuticals last raise? Syros Pharmaceuticals's most recent round was an Undisclosed round of $45M in Dec 2023. ### What was Syros Pharmaceuticals's biggest round? Syros Pharmaceuticals's largest round on record is $53M (Series B), in Oct 2014. ### Who backed Syros Pharmaceuticals first? Syros Pharmaceuticals's first round on record, in Apr 2013, was backed by ARCH Venture Partners and Flagship Pioneering, LLC. ### What stage is Syros Pharmaceuticals at? Syros Pharmaceuticals's latest named round is an Undisclosed round, in Dec 2023. ### Where is Syros Pharmaceuticals based? Syros Pharmaceuticals is based in the United States. ## Companies like Syros Pharmaceuticals In the same sector, and raised in the last eighteen months. [**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**Prolific Machines** $105M · Oct 2026](https://millionrounds.com/company/prolific-machines)[**IMIO** $19M · Oct 2026](https://millionrounds.com/company/imio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio) ## 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