Investor profile

InterWest Partners

Venture Capital · Founded 1979 · Menlo Park, United States

15 million over the span of their involvement with each company in their portfolio

180 portfolio companies Venture Capital · $6.5B invested · 349 investments · Investor rank #449 · Last investment 10/2021

Portfolio companies 180 ↑ 18% 5y

Decacorns 19

Thoroughbreds 15 ↑ 18% 5y

Power Law #395Investor Ranking · Global · 2026 · Top 3%

01 · Biggest holdings

InterWest Partners’ biggest current holdings.

The most valuable companies InterWest Partners still holds — unicorns and thoroughbreds it has backed, ordered by Dealroom’s latest valuation. Companies that have been acquired or gone public are in Exits instead.

#CompanyEst. stakeValuationEst. value

1 CanvaDecacorn · Media · Australia — $42.0B —
2 Intarcia TherapeuticsUnicorn · Health · USA — $3.9B —

Estimated value = InterWest Partners’ disclosed ownership % × Dealroom’s latest company valuation; direct named stakes only, exited positions excluded. Figures are indicative, not reported marks. See the underlying cap tables on Dealroom →

02 · Exits

InterWest Partners’ biggest exits.

Portfolio companies that IPO’d or were acquired at $1B+, with the valuation recorded at exit and — for those still public — their value today. Exit events come from each company’s funding-round history; entry stage from InterWest Partners’ transaction record.

Cisco

IPO · 1990

Now $493BTelecom

Lam Research

$80M IPO · 1984

Now $396BSemiconductors

Amgen

IPO · 1983

Now $266BHealth

Abbott

IPO · 1980

Now $214BHealth

Gilead Sciences

IPO · 1992

Now $171BHealth

GSK

IPO · 1984

Now $124BHealth

Cadence Design Systems

$130M IPO · 1987

Entered Series ANow $95BSemiconductors

Aon

IPO · 1979

Now $91BFintech

Ciena

IPO · 1997

Entered Series ANow $59BTelecom

Nokia Corporation

IPO · 1994

Now $50BTelecom

AMEC

$2.3B IPO · 2019

Now $47BSemiconductors

Alcon

IPO · 2019

Now $38BHealth

03 · Portfolio analysis

Where InterWest Partners’ portfolio is concentrated.

Distribution of portfolio companies by headquarters country, sector, entry stage and current growth stage. Across all 180 portfolio companies. "Stage entered" is the first priced round the investor joined, derived from the investor’s transaction history.

By countryCount

USA239
UK5
Canada2
Cuba2
Finland2
Israel2
Switzerland2
Australia1
Azerbaijan1
China1
Estonia1
France1

By sectorCount

Health101
Enterprise Software36
Semiconductors24
Marketing23
Telecom19
Fintech15
Media14
Education6
Jobs Recruitment5
Security5
Transportation5
Wellness Beauty5

By stage enteredCount

Series B+95
Series A63
Seed17

By growth stageCount

Breakout Stage106
Early Growth57
Late Growth56
Mature43

04 · Portfolio market map

Inside InterWest Partners’ portfolio.

The 60 highest-funded portfolio companies, of 180 tracked.

Intarcia Therapeutics

Bolt

Security

$300M

Cidara Therapeutics

Health · Unicorn

$9.2B

Cheetah Digital by Marigold

Marketing · Unicorn

$1.6B

Tizona Therapeutics

Health · Unicorn

$1.2B

The RealReal

Fashion · Unicorn

$1.8B

Gynesonics

Health

$375M

Cardiac Dimensions

Health

$212M

Enterprise Software · Unicorn

$1.0B

Sera Prognostics

Health

$36M

Avedro

Health

$100M

Optimizely

Marketing

$200M

Aryaka

Enterprise Software

$200M

Neuronetics

Health

$238M

MacroGenics

Health

$138M

Centrexion Therapeutics

Health

$162M

TESARO

Health · Unicorn

$5.1B

Silicon Optix

Semiconductors

$116M

INVIDI Technologies

Marketing

$196M

Nereus Pharmaceuticals

Health

$80M

Spredfast

Marketing

$200M

AMEC

Semiconductors · Decacorn

$47B

Metro Optix

Telecom

$216M

Totango

Marketing

$400M

ReVision Optics

Health

$60M

Artas

Health

$200M

Alvine Pharmaceuticals

Health

$280M

Eledon Pharmaceuticals

Health

$140M

Xirrus

Telecom

$30M

Standard Biotools

Health

Benvenue Medical

Health

$160M

Welcome Software

USA

NewsCred

Media

$80M

Invuity

Health

$80M

Cebix

Health

$133M

Autonomic Technologies

Health

$152M

Xenon Pharmaceuticals

Health · Unicorn

$5.0B

Achates Power

Transportation

$119M

Tapjoy

Marketing

$400M

Atritech

Health

$375M

Jobs Recruitment · Unicorn

$4.2B

Spiration

Health

$74M

Olympus America

Health

Obalon Therapeutics

Health

$240M

Applied Genetics Technologies Corporation

Health

$13M

Lycera

Health

$120M

Splice Machine

Fintech

$64M

Paracor Medical

USA

$176M

Tasman Networks

Telecom

$58M

05 · Portfolio founders

Where InterWest Partners’ portfolio founders come from.

84 founders across the 100 highest-funded portfolio companies — by current location, university attended, and the companies they worked at before founding. Sourced from the founder records the API links to each portfolio company.

LocationCount