InterWest Partners
Menlo Park, California, United StatesFounded 1979
InterWest Partners is a venture capital firm founded in 1979 and based in Menlo Park, California. For over four decades it has invested in early-stage IT and healthcare start-ups, raising more than $2.8 billion across ten funds. The firm is currently in a wind-down phase and is not seeking new investments.
Average disclosed round size is $28.9M (across 120 rounds with reported amounts).
Portfolio
81
Fund Size
$650M
Top Stage
Series B
Last 12 Mo
0
Team
Portfolio Breakdown
Stage Distribution
Sector Distribution
Investment Activity
DealsAvg Round Size
Portfolio
129 investments
| Company | Round | Amount | Date |
|---|---|---|---|
| RRevision | Series D | — | Jan 2026 |
 PMV Pharma | Seed | $50.8M | Jan 2026 |
 The RealReal | Series H | $300M | Mar 2024 |
 GoCheck | Unknown | $10M | Oct 2021 |
| GoCheck | Unknown | $10M | Jan 2021 |
 Sera Prognostics | Series D | $36M | Nov 2019 |
 Aryaka | Series F | $16M | Jan 2019 |
| Sera Prognostics | Series D | $36M | Jan 2019 |
| AAryaka Networks | Series F | $50M | Jan 2019 |
 Newscred | Unknown | $20M | Jan 2019 |
 Centrexion Therapeutics | Series D | $67M | Jan 2018 |
| CCentrexion | Series D | $67M | Jan 2018 |
 Neuronetics | Series G | $15M | Jun 2017 |
 Redshift | Series C | $11M | Mar 2017 |
| PMV Pharma | Series B | $74M | Feb 2017 |
 Spredfast | Series F | — | Jun 2016 |
 Tizona Therapeutics, Inc | Series B | $43M | Mar 2016 |
| TTizona | Series B | $43M | Mar 2016 |
| Tizona Therapeutics, Inc | Series B | $43M | Jan 2016 |
| RRevision | Unknown | $32M | Jan 2016 |
| Newscred | Series D | $42M | Sep 2015 |
| The RealReal | Series D | $40M | Apr 2015 |
| Aryaka | Series E | $16M | Mar 2015 |
| AAutonomic Technologies | Series D | $43.2M | Jan 2015 |
| AAryaka Networks | Series E | $16M | Jan 2015 |
Page 1 of 6
Top Co-Investors
Domain Associates20 shared
Canaan Partners17 shared
OrbiMed9 shared
Osage University Partners9 shared
The Goldman Sachs Group, Inc.8 shared
Versant Ventures8 shared
MPM Capital7 shared
Alta Partners7 shared
NGP Capital7 shared
Greenspring Associates6 shared
Trinity Ventures6 shared
Mohr Davidow Ventures6 shared
Presidio Ventures6 shared
Health Catalyst Capital6 shared
Polaris Partners6 shared
Intel Capital6 shared
Greycroft6 shared
500 Global5 shared
Abingworth LLP5 shared
Nexus Venture Partners5 shared
Last updated: 20 October 2026