# Jefferson Life Sciences: portfolio, investments and team > Jefferson Life Sciences is a family office. 5 investments on record, 4 in the last 12 months, latest Oct 2026. Portfolio, stages, co-investors and team. Source: https://millionrounds.com/fund/jefferson-life-sciences (Millionrounds; every figure on the page links to its filing or article) [Investor](https://millionrounds.com/investors) # Jefferson Life Sciences Last cheque observed Oct 2026; 5 cheques on record. Deploying now Family office Seed Series A Series B Therapeutics Biotech Healthcare Deploying now **100%** of best year **4** **cheques in 12 months**, 5 on record Since the last cheque **11** days **00** hrs **00** min **00** sec Median round **$65M** Rounds led **1 of 5** Mostly in **United States, 60%** Pitch Jefferson Life Sciences ## Jefferson Life Sciences highlights - 01 4 cheques in the last 12 months - 02 Mostly Series B and Series A: 80% of its rounds - 03 Led 1 rounds ## What they do > part of Jefferson River Capital, is an investment firm committed to advancing transformative innovations in medicine. From their own website - **Type:** Family office - **Cheque size:** Not stated - **Stages:** Seed Series A Series B Growth - **Sectors:** Therapeutics Biotech Healthcare - **Cold pitches:** Not accepted ## The record Every round we can evidence, newest first **5 appearances** - **2026** 4 rounds - **Oct** **[OMass Therapeutics](https://millionrounds.com/company/omass-therapeutics)** Series C · GB · Jefferson Life Sciences **$310M** With 12 others - **Jul** **[Draig Therapeutics](https://millionrounds.com/company/draig-therapeutics)** Series B · GB · Jefferson Life Sciences **$65M** With 6 others - **Jun** **[Fesarius Therapeutics](https://millionrounds.com/company/fesarius-therapeutics)** Series A · US · Jefferson Life Sciences **$20M** *Led* - **Jan** **[Juvena Therapeutics](https://millionrounds.com/company/juvena-therapeutics)** Series B · US · Jefferson Life Sciences **$34M** With 6 others - **2025** 1 round - **Jul** **[Character Biosciences](https://millionrounds.com/company/character-biosciences)** Series B · US · Jefferson Life Sciences **$93M** With 7 others An announcement gives the size of the round, not the size of this investor's cheque: the only rounds that imply a cheque are those where they were the sole named investor. ## What they claim to have backed From their own portfolio page (on their website) **1** of 6 we have independently watched raise [Blackstone](https://millionrounds.com/company/blackstone) Ascenta Capital Developers Mubadala Safar Partners aMoon Weaker than a round we watched, stronger than a list somebody sold us. A firm is far less willing to put a company on its own site that it never funded. ## The cheque Seed Series A Series B Median round joined **$65M** the round, not its cheque Led 1 of 5 rounds **20%** - **Sole investor:** Never alone - **Last cheque:** Oct 2026 Rounds by stage said on their site - Series B said *3* - Series A said *1* - Series C *1* - Seed said *-* - Growth said *-* Cheques by month Led Joined Nov 2023 Oct 2026 Often in the room with - [British Business Bank](https://millionrounds.com/fund/national-security-strategic-investment-fund) 2 - [Janus Henderson Investors](https://millionrounds.com/fund/janus-henderson-investors) 2 - [SV Health Investors](https://millionrounds.com/fund/sv-health-investors) 2 **Pitching Jefferson Life Sciences?** Put them on your fundraising board with this record on the card, and follow them to hear when they write a new cheque. Add to your CRM *→* ## Who they invest alongside The investors most often in the same rounds as Jefferson Life Sciences. A count of rooms they were both in, not a relationship either has claimed. [**British Business Bank** Corporate VC **2** rounds together](https://millionrounds.com/fund/national-security-strategic-investment-fund)[**Janus Henderson Investors** Private equity **2** rounds together](https://millionrounds.com/fund/janus-henderson-investors)[**SV Health Investors** VC firm **2** rounds together](https://millionrounds.com/fund/sv-health-investors) ## Recently backed The latest companies Jefferson Life Sciences put money into. [**OMass Therapeutics** $310M · Oct 2026](https://millionrounds.com/company/omass-therapeutics)[**Draig Therapeutics** $65M · Jul 2026](https://millionrounds.com/company/draig-therapeutics)[**Fesarius Therapeutics** $20M · Jun 2026](https://millionrounds.com/company/fesarius-therapeutics)[**Juvena Therapeutics** $34M · Jan 2026](https://millionrounds.com/company/juvena-therapeutics)[**Character Biosciences** $93M · Jul 2025](https://millionrounds.com/company/character-biosciences) ## Quick answers about Jefferson Life Sciences ### What does Jefferson Life Sciences invest in? Jefferson Life Sciences invests most often at Series B and Series A (80% of the rounds on record), in sectors such as Therapeutics, Biotech and Healthcare. ### How active is Jefferson Life Sciences? 5 investments on record, 4 of them in the last 12 months, and it led 1. The most recent was in Oct 2026. ### What has Jefferson Life Sciences invested in recently? Its most recent investments on record: OMass Therapeutics (Series C, Oct 2026), Draig Therapeutics (Series B, Jul 2026) and Fesarius Therapeutics (Series A, Jun 2026). ### How big are Jefferson Life Sciences's cheques? The median round it joins is $65M. ### Does Jefferson Life Sciences lead rounds? Yes: it led 1 of its 5 investments on record (20%). ### Where does Jefferson Life Sciences invest? Most of the companies it backs are in the United States (60%) and the United Kingdom (40%). ### Is Jefferson Life Sciences investing now? Yes: it is actively investing, with 4 investments in the last 12 months. ### Who does Jefferson Life Sciences invest alongside? Most often British Business Bank (2 rounds together), Janus Henderson Investors (2 rounds together) and SV Health Investors (2 rounds together). ## Raising now? Find the investors who back rounds like yours, and keep every conversation on one fundraising board. Find similar investorsOpen your CRM Built from the rounds we watched, its filings and its own website, refreshed every night. [How we count](https://millionrounds.com/methodology) · [Report a correction](https://millionrounds.com/corrections?slug=jefferson-life-sciences) · [Is this your firm? Claim it](https://millionrounds.com/claim?org=jefferson-life-sciences)