# TRex Bio funding: rounds and investors > TRex Bio has raised $251M across 3 rounds since 2024. Investors include Polaris Partners, Eli Lilly and SV Health Investors. Every round with its source. Source: https://millionrounds.com/company/trex-bio (Millionrounds; every figure on the page links to its filing or article) United States · [Funded startup](https://millionrounds.com/companies) # Who invested in *TRex Bio* 3 rounds we have observed, with the 5 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 Raised 1 month ago Funding summary Updated 26 Oct 2026 **$251M** raised across 3 rounds since 2024, from 3 sources **$84M** Series B **$50M** Venture **$117M** Round - **Latest round:** Round, $117M Oct 2026 - **Step-up i:** 2.3× - **Investors:** 5 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. 2025 2026 **$84M** Series B **$50M** Venture **$117M** Round - **First round:** Series B, $84M - **Biggest round:** $117M - **Usual gap between rounds:** 14 months ## The rounds - **Oct 2026** Round **$117M** No investor was named in the report. Reported by MedCity News - **Jan 2026** Venture **$50M** *1 new* *3 returning* [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) [Eli Lilly](https://millionrounds.com/fund/eli-lilly) [SV Health Investors](https://millionrounds.com/fund/sv-health-investors) Source recorded - **Nov 2024** Series B **$84M** *4 new* [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [Eli Lilly](https://millionrounds.com/fund/eli-lilly) [Alexandria Venture Investments](https://millionrounds.com/fund/alexandria-venture-investments) [SV Health Investors](https://millionrounds.com/fund/sv-health-investors) Source recorded ## 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 B** 2024 **Venture** 2026 **Round** 2026 [Polaris Partners](https://millionrounds.com/fund/polaris-partners) [Eli Lilly](https://millionrounds.com/fund/eli-lilly) [SV Health Investors](https://millionrounds.com/fund/sv-health-investors) [Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) [Alexandria Venture Investments](https://millionrounds.com/fund/alexandria-venture-investments) ## Everyone who backed them [Polaris Partners](https://millionrounds.com/fund/polaris-partners) VC firm **2** rounds [Eli Lilly](https://millionrounds.com/fund/eli-lilly) Corporate VC **2** rounds [SV Health Investors](https://millionrounds.com/fund/sv-health-investors) VC firm **2** rounds [Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) Private equity **1** round [Alexandria Venture Investments](https://millionrounds.com/fund/alexandria-venture-investments) VC firm **1** round Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=trex-bio). ## Quick answers about TRex Bio ### Who invested in TRex Bio? TRex Bio's investors include Polaris Partners, Eli Lilly, SV Health Investors, Janus Henderson Investors and Alexandria Venture Investments. ### How much has TRex Bio raised? TRex Bio has raised $251M across 3 rounds since 2024. ### When did TRex Bio last raise? TRex Bio's most recent round was an Undisclosed round of $117M in Oct 2026. ### What was TRex Bio's biggest round? Its most recent round, $117M in Oct 2026, is also its largest on record. ### Who backed TRex Bio first? TRex Bio's first round on record, in Nov 2024, was backed by Polaris Partners, Eli Lilly and Alexandria Venture Investments and 1 others. ### What stage is TRex Bio at? TRex Bio's latest named round is an Undisclosed round, in Oct 2026. ### Where is TRex Bio based? TRex Bio is based in the United States. ## Companies like TRex Bio 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