Firms, funds, partners, companies and rounds from sworn filings, firm sites and announcements, kept as a graph with a date and a source on every edge. Facts, inferences and estimates are labelled as such. A fund target is never a close, GAV is never dry powder, and a round size is never an investor’s check.

Firms / Interwest Partners

Interwest Partners

Institutional venture firmSan Francisco, CAinterwest.comSEC venture capital fund adviser

venture manager, reported GAV $199M across 3 vehicles

Importance
28
moderate
Active deployment
4
low
Emerging
0
low
Completeness
69
high
Freshness
100
high
Research priority
5
low
Identity and regulatory footprint
Headquarters
San Francisco, CAadviserinfo.sec.gov
Office address
548 MARKET STREET, #44661, San Francisco, CA, 94104-5401adviserinfo.sec.gov
Business phone
650-854-8585adviserinfo.sec.gov
SEC adviser type
exempt reporting adviseradviserinfo.sec.gov
SEC exemption claimed
venture capital fund adviseradviserinfo.sec.govItem 2.B(1): advises solely venture capital funds
Latest Form ADV
Mar 27, 2026
Private funds reported
2 (2 venture capital funds)adviserinfo.sec.gov
Private fund gross assets
$251Madviserinfo.sec.govreported GAV of the funds, the adviser's own number; not fund size, not dry powder
Owners on Schedule A
Matadoro Investments, LP (Member Of Interwest Management Partners Viii, Llc), B; Matadoro Management Investments, LLC (General Partner), F
business email
info@interwest.cominterwest.compublished by the subject
business phone
650-854-8585adviserinfo.sec.govpublished by the subject
Stated thesis versus observed behaviour
1 observed deals
Stated (the firm’s website)
Sectors
healthcare
Stages
early
Geography
not stated
Check size
not stated; DFX does not estimate checks from round sizes
Observed (from deals on record)
Stage at participation: no observed deals yet
Stage at first entry: no observed deals yet
Sectors
unknown 100%
lead rate n/afollow-on rate n/anew logos, 12 months 1
Funds and vehicles
3 reported, 6 no longer reported
VehicleTypeVintageLifecycleReported GAVOwnersForm D soldLatest Form D
Interwest Partners X, LPFundunknownUnknown$191M
Mar 28, 2024
69unknownunknown
Interwest Partners Viii, LPFundunknownUnknown$4.4M
Mar 28, 2024
56unknownunknown
Interwest Partners Ix, LPFundunknownUnknown$4.2M
Mar 28, 2024
64unknownunknown
Interwest Partners VII, LPFundunknownWound down$9.9M
Mar 29, 2017
29unknownunknown
Interwest Partners VI, LPFundunknownWound down$3.7M
Mar 27, 2013
39unknownunknown
Interwest Investors Q Viii, LPFundunknownWound down$2.5M
Mar 25, 2020
103unknownunknown
Interwest Investors Viii, LPFundunknownWound down$747,935
Mar 25, 2020
47unknownunknown
Interwest Investors VII, LPFundunknownWound down$739,820
Mar 29, 2017
86unknownunknown
Interwest Investors VI, LPFundunknownWound down$609,229
Apr 9, 2012
50unknownunknown
GAV is the gross asset value the adviser reported on Form ADV for the vehicle, never the fund’s committed size and never dry powder. Form D sold is the amount sold as of the latest filing, never a final close.
Investment team
27 current, 10 departed
Bruce Allan Cleveland
Member Of Interwest Management Partners Ix, Llc And Trustee Cleveland Family Trust Udt 11/25/97 · since Jun 1, 2006
Board or advisory
Carol Jean Gianos
Member Of Interwest Management Partners Ix, Llc And Trustee Gianos Revocable Trust Uad 3/22/99 · since Sep 1, 2005
Board or advisory
Carolyn Shaw Bowsher
Member Of Interwest Management Partners Viii, Llc And Trustee The Stephen And Carolyn Bowsher Revocable Trust U/A Dtd 8/30/2001 · since Aug 1, 2001
Board or advisory
Deborah Lynn Michel Rosch
Member Of Interwest Management Partners Viii, Llc And Trustee Rosch Revocable Trust U/A/D/ 12/12/2002 · since Aug 1, 2018
Board or advisory
Douglas Allen Pepper
Member Of Interwest Management Partners Ix, Llc And Trustee Pepper Family Trust Dated 6/26/08 · since Sep 1, 2005
Board or advisory
Elizabeth S Sweeney
Member Of Interwest Management Partners Ix, Llc And Trustee Sweeney Family Living Trust U/A Dtd 07/27/2006 · since Oct 1, 2018
Board or advisory
Jobeth Maglathlin Cash
Member Of Interwest Management Partners Viii, Llc And Trustee Of The Jobeth Maglathlin Cash Survivors Trust Dated 10/2/2017 · since Jan 1, 2021
Board or advisory
Kimberly Mendelson Pepper
Member Of Interwest Management Partners Ix, Llc And Trustee Pepper Family Trust, Dated 6/26/08 · since Sep 1, 2005
Board or advisory
Kristina a Nasr
Member Of Interwest Management Partners Ix, Llc And Trustee Nasr Family Trust Dated 2/5/2016 · since Feb 1, 2016
Board or advisory
Michael Bilstad Sweeney
Member Of Interwest Management Partners Ix, Llc And Trustee Sweeney Living Trust U/A Dtd 07/27/2006 · since Sep 1, 2005
Board or advisory
Nina Sofia Kjellson
Member Of Interwest Management Partners X, Llc And Trustee Nina Kjellson Living Trust Dtd 10/8/2008 · since Aug 1, 2008
Board or advisory
Paula Renee Oronsky
Member Of Interwest Management Partners X, Llc And Trustee Oronsky Marital Trust Dated 12/15/2000 · since Dec 1, 2022
Board or advisory
Philip Theodore Gianos
Member Of Interwest Management Partners Ix, Llc & Trustee Gianos Revocable Trust Uad 3/22/99 · since Sep 1, 2005
Board or advisory
Robin Ann Cleveland
Member Of Interwest Management Partners Ix, Llc And Trustee Cleveland Family Trust Udt 11/25/97 · since Jun 1, 2006
Board or advisory
Stephen Charles Bowsher
Member Of Interwest Management Partners Viii, Llc And Trustee The Stephen And Carolyn Bowsher Revocable Trust U/A Dtd 8/30/2001 · since Feb 1, 1999
Board or advisory
Thomas Lee Rosch
Member Of Interwest Management Partners Ix, Llc And Trustee Rosch Revocable Trust U/A/D 12/12/2002 · since Sep 1, 2005
Board or advisory
Yasemin B Kliman
Member Of Interwest Management Partners X, Llc And Trustee Gyk Trust Dated 12/17/2014 · since Jan 1, 2019
Board or advisory
Gilbert Harrow Kliman
Ceo Of Interwest Venture Management Co. & Trustee Of Gilbert H. Kliman Trust Dated 11/15/2002 · since Apr 1, 2003
Founder or executive
Karen Ann Wilson
Chief Financial Officer Of Interwest Venture Management Co. · since May 1, 2011
Platform and operations
Khaled Asad Nasr
Secretary And Chief Operating Officer Of Interwest Venture Management Co · since Jan 1, 2016
Platform and operations
10 departed (kept with end dates)
  • Alan Warren Crites · Member Of Interwest Management Partners Vi, Llc And Trustee Of Crites Family Trust 2000 U/I Dtd 2/18/2000 · Jun 1, 1996 to Mar 26, 2014 Inference
  • Carol Beth Crites · Member Of Interwest Management Partners Vi, Llc And Trustee Of Crites Family Trust 2000 U/I Dtd 2/18/2000 · Mar 1, 2000 to Mar 26, 2014 Inference
  • Carol Lee Momsen · Member Of Interwest Management Partners Vi, Llc And Trustee Of Momsen Living Trust Uad 1/5/95 · Jun 1, 1996 to Mar 26, 2014 Inference
  • Deborah D Mcalexander Holmes · Member Of Interwest Management Partners X, Llc And Trustee Holmes Revocable Trust Dated 9/1/2016 · Sep 1, 2016 to Mar 29, 2023 Inference
  • Walter Stephen Holmes · Member Of Interwest Management Partners X, Llc And Trustee Holmes Revocable Trust Dated 9/1/2016 · Aug 1, 2008 to Mar 29, 2023 Inference
  • Arnold Lewis Oronsky · Member And Elected Managing Director, Interwest Management Partners X, Llc & Trustee Oronsky Living Trust Dated 12/15/2000 · Aug 1, 2008 to Mar 25, 2021 Inference
  • Dianne Tripplehorn Cash · Member Of Interwest Management Partners Vii, Llc · Sep 1, 2000 to Mar 26, 2018 Inference
  • Harvey Berryman Cash · Member Of Interwest Management Partners Ix, Llc · Sep 1, 2005 to Mar 28, 2019 Inference
  • Robert Ray Momsen · Member And Elected Managing Director, Interwest Management Partners Vi, Llc & Trustee Momsen Living Trust Uad 1/5/95 · Jun 1, 1996 to Mar 26, 2014 Inference
  • Christopher Band Ehrlich · Vice President Of Interwest Venture Management Co. And Trustee Of The Ehrlich Living Trust Dated 6/4/2004 · Apr 1, 2009 to Mar 26, 2014 Inference
Investments on record
1 edges, 1 companies, 0 partner-attributed
CompanyRoundRolePartnerRound sizeThis investorDateSource
Canvaportfolio listingunknownunknownunknownunknownSep 16, 2026Fact Venture organization websites (about, team, portfolio, thesis, news pages)
“This investor” is the amount disclosed for this investor alone; it is unknown unless a source said it. The round size is the whole round.
Co-investors
5 relationships from shared deals, counted for the whole firm
Limited partners
4 disclosed
Timeline
32 dated events
  1. Jun 30, 2025
  2. Mar 29, 2023
    Walter Stephen Holmes (Member Of Interwest Management Partners X, Llc And Trustee Holmes Revocable Trust Dated 9/1/2016) no longer on Schedule A of Interwest Partners
  3. Mar 29, 2023
    Deborah D Mcalexander Holmes (Member Of Interwest Management Partners X, Llc And Trustee Holmes Revocable Trust Dated 9/1/2016) no longer on Schedule A of Interwest Partners
  4. Mar 25, 2021
    Interwest Investors Viii, LP no longer reported on Form ADV by Interwest Partners
  5. Mar 25, 2021
    Arnold Lewis Oronsky (Member And Elected Managing Director, Interwest Management Partners X, Llc & Trustee Oronsky Living Trust Dated 12/15/2000) no longer on Schedule A of Interwest Partners
  6. Mar 25, 2021
    Interwest Investors Q Viii, LP no longer reported on Form ADV by Interwest Partners
  7. Jan 1, 2021
    Jobeth Maglathlin Cash joined Schedule A of Interwest Partners as Member Of Interwest Management Partners Viii, Llc And Trustee Of The Jobeth Maglathlin Cash Survivors Trust Dated 10/2/2017
  8. Mar 28, 2019
    Harvey Berryman Cash (Member Of Interwest Management Partners Ix, Llc) no longer on Schedule A of Interwest Partners
  9. Jan 1, 2019
    Yasemin B Kliman joined Schedule A of Interwest Partners as Member Of Interwest Management Partners X, Llc And Trustee Gyk Trust Dated 12/17/2014
  10. Oct 1, 2018
    Elizabeth S Sweeney joined Schedule A of Interwest Partners as Member Of Interwest Management Partners Ix, Llc And Trustee Sweeney Family Living Trust U/A Dtd 07/27/2006
  11. Mar 26, 2018
    Interwest Investors VII, LP no longer reported on Form ADV by Interwest Partners
  12. Mar 26, 2018
    Interwest Partners VII, LP no longer reported on Form ADV by Interwest Partners
  13. Mar 26, 2018
    Dianne Tripplehorn Cash (Member Of Interwest Management Partners Vii, Llc) no longer on Schedule A of Interwest Partners
  14. Sep 1, 2016
    Deborah D Mcalexander Holmes joined Schedule A of Interwest Partners as Member Of Interwest Management Partners X, Llc And Trustee Holmes Revocable Trust Dated 9/1/2016
  15. Feb 1, 2016
    Kristina a Nasr joined Schedule A of Interwest Partners as Member Of Interwest Management Partners Ix, Llc And Trustee Nasr Family Trust Dated 2/5/2016
  16. Mar 26, 2014
    Robert Ray Momsen (Member And Elected Managing Director, Interwest Management Partners Vi, Llc & Trustee Momsen Living Trust Uad 1/5/95) no longer on Schedule A of Interwest Partners
  17. Mar 26, 2014
    Carol Lee Momsen (Member Of Interwest Management Partners Vi, Llc And Trustee Of Momsen Living Trust Uad 1/5/95) no longer on Schedule A of Interwest Partners
  18. Mar 26, 2014
    Interwest Partners VI, LP no longer reported on Form ADV by Interwest Partners
  19. Mar 26, 2014
    Alan Warren Crites (Member Of Interwest Management Partners Vi, Llc And Trustee Of Crites Family Trust 2000 U/I Dtd 2/18/2000) no longer on Schedule A of Interwest Partners
  20. Mar 26, 2014
    Christopher Band Ehrlich (Vice President Of Interwest Venture Management Co. And Trustee Of The Ehrlich Living Trust Dated 6/4/2004) no longer on Schedule A of Interwest Partners
  21. Mar 26, 2014
    Carol Beth Crites (Member Of Interwest Management Partners Vi, Llc And Trustee Of Crites Family Trust 2000 U/I Dtd 2/18/2000) no longer on Schedule A of Interwest Partners
  22. Mar 27, 2013
    Interwest Investors VI, LP no longer reported on Form ADV by Interwest Partners
  23. Mar 30, 2012
    Interwest Investors VI, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $609,229
  24. Mar 30, 2012
    Interwest Partners VI, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $3,538,553
  25. Mar 30, 2012
    Interwest Partners VII, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $78,034,843
  26. Mar 30, 2012
    Interwest Partners Viii, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $266,542,591
  27. Mar 30, 2012
    Interwest Partners Ix, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $598,043,873
  28. Mar 30, 2012
    Interwest Partners X, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $611,941,267
  29. Mar 30, 2012
    Interwest Investors Viii, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $2,399,814
  30. Mar 30, 2012
    Interwest Investors Q Viii, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $8,272,023
  31. Mar 30, 2012
    Interwest Investors VII, LP first reported on Form ADV by Interwest Partners (Venture Capital Fund), GAV $5,421,118
  32. Mar 30, 2012
    Interwest Partners first filed Form ADV (ERA, venture capital fund adviser exemption)
Classification history
  1. Sep 12, 2026
    Institutional venture firm (confirmed, 95%, cls-1)
    venture manager, reported GAV $199M across 3 vehicles
Evidence
54 observations from 3 sources
Every observation behind this profile, with its source, date and class
FactValueEffectiveClassSource
Why admittedvc_exemption,vc_funds_reportedMar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
SEC exemption claimedventure_capital_fund_adviserMar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
SEC exemption claimedventure_capital_fund_adviserMar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
SEC adviser typeexempt_reporting_adviserMar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
SEC adviser typeexempt_reporting_adviserMar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
First Form ADV filing2012-03-30Mar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Adv history loadedadv-hist-1Sep 12, 2026FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Latest Form ADV filing2026-03-27Mar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
Latest Form ADV filing2024-03-28Mar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
SEC statusERA - ActiveMar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
SEC status effective2012-03-30Mar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
Venture share of reported funds1Mar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Business phone650-854-8585Mar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
Business phone650-854-8585Mar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Contact page urlhttps://www.interwest.com/contact.html
contact page linked from the home page
Sep 16, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
HeadquartersSan Francisco, CAMar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
HeadquartersSan Francisco, CAMar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Office address548 MARKET STREET, #44661, San Francisco, CA, 94104-5401Mar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
Office address548 MARKET STREET, #44661, San Francisco, CA, 94104-5401Mar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Legal formCorporationMar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
Legal formCorporationMar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Portfolio pagehttps://www.interwest.com/portfolio.html
1 entries read
Sep 16, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Portfolio pagehttps://www.interwest.com/portfolio.html
1 entries read
Sep 13, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Private funds reported2Mar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
Private funds reported3Mar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Private fund gross assets (reported)$251MMar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
Private fund gross assets (reported)$199MMar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Stated sectorshealthcare
sector words on the home page
Sep 16, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Stated sectorshealthcare
sector words on the home page
Sep 13, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Stated stagesearly
stage words on the home page
Sep 16, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Stated stagesearly
stage words on the home page
Sep 13, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Team pagehttps://www.interwest.com/team.html
5 name/title pairs read
Sep 16, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Team pagehttps://www.interwest.com/team.html
5 name/title pairs read
Sep 13, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Venture funds reported2Mar 27, 2026FactSEC Form ADV monthly roster (registered + exempt reporting advisers)
Venture funds reported3Mar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
WebsiteHTTP://WWW.INTERWEST.COM/Mar 28, 2024FactSEC Form ADV filing data 2011 to 2024 (every filing, Schedule D 7.B.(1) private funds, Schedules A/B)
Site titleInside InterWest - Entrepreneurs in IT & Healthcare | InterWest
title tag
Sep 16, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)
Site titleInside InterWest - Entrepreneurs in IT & Healthcare | InterWest
title tag
Sep 13, 2026FactVenture organization websites (about, team, portfolio, thesis, news pages)