United States · 
What does InterWest Partners invest in?
InterWest Partners invests most often at Series B and Series C (43% of the rounds on record), in sectors such as IT and Healthcare.
InterWest Partners highlights
- 01
308 rounds on record
- 02
Mostly Series B and Series C: 43% of its rounds
- 03
Sole investor in 7 rounds, median $5.3M
- 04
45 exits from the portfolio
What they do
For over four decades, InterWest Partners has invested in some of the world's most promising early-stage IT and healthcare start-ups.From their own website
- Type
- VC firm (from a list, unverified)
- Cheque size
- Not stated
- Stages
- Pre-seedSeedSeries ASeries BGrowthPre-IPO
- Sectors
- ITHealthcare
- Based in
- Menlo Park, United States
- Cold pitches
- Not accepted
The record
Every round we can evidence, newest first308 appearances
- 2019
6 rounds
- Nov
- Nov
- Jul
- Jun
- May
- Jan
- 2018
1 round
- May
- 2017
6 rounds
- Dec
- Sept
- Jun
- Apr
- Jan
- Jan
- 2016
5 rounds
- Nov
- Sept
- Aug
- Apr
- Jan
- 2015
15 rounds
- Nov
- Nov
- Sept
- Sept
- Aug
- Jul
- Jun
- Jun
- May
- Apr
- Mar
- Feb
- Feb
- Jan
- Jan
- 2014
29 rounds
- Dec
- Nov
- Oct
- Oct
- Oct
- Oct
- Aug
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.
The team
Named by the firm itself, on a filing, its Form ADV or its company registration20 named
BABruce Allan ClevelandMember of Interwest Management Parners X, LLC and Trustee Cleveland Family Trust Udt 11/25/97iForm ADV
CJCarol Jean GianosMember of Interwest Management Partners Viii, LLC and Trustee Gianos Revocable Trust Uad 3/22/99iForm ADV
CSCarolyn Shaw BowsherMember of Interwest Management Partners Viii, LLC and Trustee the Stephen and Carolyn Bowsher Revocable Trust U/a Dtd 8/iForm ADV
DLDeborah Lynn Michel RoschMember of Interwest Management Partners Ix, LLC and Trustee Rosch Revocable Trust U/a/D 12/12/2002iForm ADV
DADouglas Allen PepperMember of Interwest Management Partners X, LLC & Trustee Pepper Family Trust Dated 6/26/08iForm ADV
ESElizabeth S SweeneyMember of Interwest Management Partners Ix, LLC and Trustee Sweeney Family Living Trust U/a Dtd 07/27/2006iForm ADV
GHGilbert Harrow KlimanMember & Elected Managing Director, Interwest Management Partners Viii, LLC & Trustee Gilbert H. Kliman Trust Dated 11/1iForm ADV
JMJobeth Maglathlin CashMember of Interwest Management Partners Viii, LLC and Trustee of the H. Berry Cash Bypass Trust Dated 10/2/2017iForm ADV
KAKaren Ann WilsonChief Financial Officer of Interwest Venture Management Co.iForm ADV
KAKhaled Asad NasrVenture Member of Interwest Management Partners Ix, LLC and Trustee Nasr Family Trust Dated 2/5/2016iForm ADV
KMKimberly Mendelson PepperMember of Interwest Management Partners X, LLC and Trustee Pepper Family Trust, Dated 6/26/08iForm ADV
KAKristina A NasrMember of Interwest Management Partners Ix, LLC and Trustee Nasr Family Trust Dated 2/5/2016iForm ADV
MBMichael Bilstad SweeneyMember of Interwest Management Partners Ix, LLC and Trustee Sweeney Living Trust U/a Dtd 07/27/2006iForm ADV
NSNina Sofia KjellsonMember of Interwest Management Partners X, LLC and Trustee Nina Kjellson Living Trust Dtd 10/8/2008iForm ADV
PRPaula Renee OronskyMember of Interwest Management Partners Ix, LLC and Trustee Oronsky Survivor's Trust Dated 12/15/2000iForm ADV
PTPhilip Theodore GianosMember of Interwest Management Partners Viii, LLC & Trustee of the Gianos Revocable Trust Uad 3/22/99iForm ADV
RARobin Ann ClevelandMember of Interwest Management Partners X, LLC and Trustee Cleveland Family Trust Udt 11/25/97iForm ADV
SCStephen Charles BowsherMember of Interwest Management Partners Viii, LLC and Trustee the Stephen and Carolyn Bowsher Revocable Trust U/a Dtd 8/iForm ADV
TLThomas Lee RoschMember of Interwest Management Partners Viii, LLC and Trustee Rosch Revocable Trust U/a/D/ 12/12/2002iForm ADV
YBYasemin B KlimanMember of Interwest Management Partners X, LLC and Trustee Gyk Trust Dated 12/17/2014iForm ADV
We also hold 31 people at this firm from the lists this database was built from: a weaker source than the filings, since a list does not say when a title ended. Login to see them.
What the register says
From the firm's own filings with the SEC, which it must file accurately by law
$251Mgross assets of its fundsOct 2026
Exemptreporting adviserventure or small private funds
- Legal name
- Interwest Venture Management Company
- SEC number
- CRD 160677
Who backs their funds
2 LPs on record in InterWest Partners's funds
- Committed
- $125M
- Funds
- 3
- Vintages
- 1997 to 2005
The institutions that put money into its funds, which the firm then invests in companies.Source: the pension's own report, latest Mar 2026.
- California State Teachers Retirement System2 funds$115M
Fund Vintage Committed InterWest Partners IX 2005 $40M InterWest Partners VIII 2000 $75M 
Washington State Investment Board1 fund$10MFund Vintage Committed InterWest Partners VI 1997 $10M
What they claim to have backed
From their own portfolio page (on their website)
10 of 24 we have independently watched raise
BrazeC3CanvaDoximityMarketoPMV PharmaPipedriveTapjoyTheRealRealVungleAerieAkarRxAmplimmuneAsprevaCienaCopper Mountain NetworksCorixaCyrixIntraLaseLabrysLenSx LasersMyogenSratacomTheraSense
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.
Exits from the portfolio
Companies it backed that were later bought or listed45 in all
InVisage TechnologiesBought by AppleUndisclosedNov 2017
NexPlanarBought by Cabot Microelectronics CorporationUndisclosedDec 2015
Eiger BioPharmaceuticalsBought by CelladonUndisclosedNov 2015
C9 Inc.Bought by InsideSales.comUndisclosedMay 2015
Get SatisfactionBought by SprinklrUndisclosedApr 2015
VendavoBought by Francisco PartnersUndisclosedOct 2014
Empowered CareersBought by Qualcomm IncorporatedUndisclosedJul 2014
Concept.ioBought by Apple$30MJul 2014
NuventixBought by Aavid ThermalloyUndisclosedJul 2014
Labrys BiologicsBought by Teva Pharmaceutical Industries$825MJun 2014
GojeeBought by XO Group, Inc.UndisclosedMar 2014
SignalDemandBought by PROS Holdings$14MDec 2013
AmplimmuneBought by AstraZeneca$500MAug 2013
VaroliiBought by LifeLock$43MAug 2013
Trius TherapeuticsBought by Cubist Pharmaceuticals$707MJul 2013
Trius TherapeuticsListedUndisclosedJul 2013
MarketoListed$79MApr 2013
The latest 20 here. An exit counts when it came after the firm's first round in the company. From historical deal records.