AIHealthcareMobility & TransportationCybersecurityFintechEnterprise SoftwareSaaSBiotech & Life SciencesClimate & EnergyConsumer
The venture capital firm LifeX Ventures focuses on investing in early-stage life sciences companies, including medical devices, digital health, health tech, drug discovery tools/software, diagnostics, biotech, and therapeutics. Its strategy involves providing capital alongside hands-on engagement and strategic guidance to accelerate and de-risk these companies from pre-seed through Series A funding.
Deal activity increased 100% year-over-year (6 deals in the last 12 months). Their most common stage is seed (40% of deals). Average disclosed round size is $16.1M (across 14 rounds with reported amounts).
Portfolio
15
Fund Size
$30M
Top Stage
Seed
Last 12 Mo
6
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
15 investments
| Company | Round | Amount | Date |
|---|---|---|---|
 NoTraffic | Series C | $90M | Mar 2026 |
| MMITO AI | Seed | $4.5M | Jan 2026 |
| IInfiniteWatch | Pre-Seed | $4M | Dec 2025 |
 Ohai.ai | Seed | — | Aug 2025 |
| EElfie | Series A | $12M | Jun 2025 |
 Stack AI | Series A | $16M | May 2025 |
 Concentro | Seed | $3M | Dec 2024 |
 World Class Health | Seed | $8M | Nov 2024 |
| RRhea | Unknown | $10M | May 2024 |
| CCentury Health | Pre-Seed | $2M | Mar 2024 |
| MMonomer Bio | Seed | $5.6M | Feb 2024 |
| HHaven Energy | Series A | $7M | Jan 2024 |
| HHypervision Surgical | Seed | $8.1M | Jun 2023 |
| MMITO AI | Pre-Seed | $4.5M | — |
 Mytra | Series B | $50M | — |
Top Co-Investors
Kibo3 shared
KFund3 shared
Sequoia Capital3 shared
a16z Scout Fund3 shared
Lightspeed Venture Partners2 shared
Alumni Ventures Group1 shared
Redalpine1 shared
White Star Capital1 shared
Integra Partners1 shared
FEBE1 shared
Hustle Fund1 shared
firstminute capital1 shared
Silence VC1 shared
Plug & Play1 shared
J2 ventures1 shared
Contour Venture Partners1 shared
Dorm Room Fund1 shared
AlleyCorp1 shared
Joyance Partners1 shared
City Light Capital1 shared
Last updated: 15 April 2026