InterWest Partners

InterWest Partners
Name	InterWest Partners
Type	Private
Industry	Venture capital
Founded	1979
Headquarters	Menlo Park, California
Key people	Don Valentine; Peter Thiel; N/A
Products	Venture capital funds

InterWest Partners is a Menlo Park-based venture capital firm founded in 1979 that specialized in early-stage investments in technology and life sciences companies. The firm participated in financing rounds across Silicon Valley, California, and the broader United States and influenced the development of startups in semiconductors, software, biotechnology, medical devices, and telecommunications. InterWest Partners built a portfolio that intersected with prominent firms, research institutions, and corporate acquirers that shaped innovation from the 1980s through the 2000s.

History

InterWest Partners was established in the late 1970s amid a surge of venture activity in Silicon Valley alongside firms like Sequoia Capital, Kleiner Perkins, and Mayfield Fund. Early activity coincided with developments at Intel, Hewlett-Packard, Fairchild Semiconductor, and the growth of university research at Stanford University and University of California, Berkeley. Through the 1980s and 1990s the firm participated in funding cycles that included companies linked to executives from National Semiconductor, Advanced Micro Devices, Texas Instruments, and founders emerging from Xerox PARC. InterWest navigated market cycles including the 1987 stock market crash, the dot-com bubble of the late 1990s, and the 2001 recession, engaging with strategic partners such as Cisco Systems, Lucent Technologies, Oracle Corporation, and Applied Materials in later-stage exits.

Investment Focus and Strategy

InterWest focused on early-stage and growth-stage investments across sectors where firms like Genentech, Amgen, Qualcomm, and NVIDIA were also active. The firm emphasized backing technical founding teams with ties to institutions such as Massachusetts Institute of Technology, California Institute of Technology, Johns Hopkins University, and corporate spinouts from IBM Research and Bell Labs. InterWest leveraged diligence practices common among peers like Battery Ventures and Accel Partners, targeting capital-efficient product development and licensing pathways involving firms such as Medtronic, Johnson & Johnson, Pfizer, and Abbott Laboratories. Its strategy included participating in Series A rounds, syndicating with investors like Benchmark Capital and Greylock Partners, and preparing companies for public offerings on exchanges like NASDAQ and New York Stock Exchange or strategic acquisitions by conglomerates including Microsoft and Google.

Notable Funds and Investments

InterWest’s portfolio encompassed companies across semiconductors, enterprise software, networks, and healthcare that interacted with prominent buyers and market leaders. The firm invested in startups that later collaborated with or were acquired by Intel Corporation, Broadcom, EMC Corporation, and Symantec. Notable portfolio companies included firms whose trajectories intersected with Apple Inc., Sun Microsystems, Adobe Systems, Sierra Wireless, Genomic Health, and Intuitive Surgical. Several InterWest-backed companies completed initial public offerings that listed alongside peers like Lycos, Yahoo!, Cisco, and VMware. The firm also supported medical device and biotechnology ventures that licensed technology to or were acquired by Roche, GlaxoSmithKline, AstraZeneca, and Novartis.

Organizational Structure and Leadership

InterWest’s leadership roster over time included general partners and operating executives with backgrounds at institutions such as Morgan Stanley, Goldman Sachs, Deloitte, and Ernst & Young. The firm’s governance followed limited partnership structures similar to those used by Bessemer Venture Partners and General Catalyst, with advisory boards drawing members from industry leaders at AbbVie, Bayer, and academic centers like Harvard Medical School. InterWest engaged operating partners to assist portfolio firms with regulatory pathways involving Food and Drug Administration filings and commercialization channels through distributors such as Cardinal Health and McKesson Corporation. Its internal teams coordinated with legal counsel experienced with intellectual property litigation in forums like the United States Court of Appeals for the Federal Circuit.

Impact and Industry Recognition

InterWest contributed to building startup ecosystems that paralleled the successes of Silicon Valley Bank, TechCrunch, and trade groups such as the National Venture Capital Association. The firm’s investments helped shape technology clusters in Silicon Valley, the San Francisco Bay Area, and biotechnology corridors near San Diego and the Boston metropolitan area. InterWest partners and alumni went on to serve on boards of directors at companies such as Dropbox, LinkedIn, Stripe, and research institutions including Salk Institute for Biological Studies. The firm and its executives received acknowledgments in venture analyses and business publications alongside coverage of peers like Forbes, The Wall Street Journal, and The New York Times.

Controversies and Litigation

Like many venture firms, InterWest faced disputes involving portfolio company restructurings, shareholder litigation, and intellectual property claims that involved parties such as patent trolls (non-practicing entities), competitor startups, and corporate licensors. Litigation occasionally reached federal courts where judges referenced precedents from cases involving Intel, Broadcom, and Apple. Conflicts typically centered on valuation disputes in down rounds, fiduciary duty claims by minority shareholders, and patent infringement matters adjudicated at venues including the United States District Court for the Northern District of California.

Category:Venture capital firms