About Thomas Weisel Venture Partners
Thomas Weisel Venture Partners is a venture capital firm founded in 2000. It is primarily based out of San Francisco, United States. As of Aug 2009, Thomas Weisel Venture Partners has invested in 21 companies. It primarily invests in Series C round in United States based startups. Its investments are spread across a wide range of sectors from Enterprise Applications to Enterprise Infrastructure and High Tech. Most recently it participated in the $***** Series C round of Medsphere Systems Overall, Thomas Weisel Venture Partners portfolio has seen 15 acquisitions including key companies like Motorola Mobility, Vocera and Control4. A lot of funds co-invest with Thomas Weisel Venture Partners, with names like Thomas Weisel Partners sharing a substantial percentage of its portfolio. Thomas Weisel Venture Partners has team of 5 people including 1 partners.Key Metrics
Team Members
Portfolio Count
Portfolio Sectors
Portfolio Locations
Rounds of Entry
Series C, Series B & 1 more
Portfolio Soonicorns
Thomas Weisel Venture Partners' List of Top Investments
Thomas Weisel Venture Partners has a portfolio of 21 companies. Their most notable investments are in Santur Corporation and Santur Corporation.Their portfolio spans across and United States. They have invested in Enterprise Applications, Enterprise Infrastructure, High Tech and 11 other sectors, across stages such as Series C, Series B and 1 more. Here is the list of top investments by Thomas Weisel Venture Partners:Key facts about Motorola Mobility
- Founded Year: 1928
- Location: Chicago (United States)
- Stage: Acquired
- Total Funding till date: $10M
- Employee Count: 24,274 as on May 31, 2026
- Investors: De Incubator, Trinity Ventures and 4 Others
- Latest Funding Round: Series B, Sep 27, 2005, $*****
- Highlight: Acquired
2. Vocera
Cloud-based team messaging and workflow management solutions for providers. Provides mobile communication solutions & integrated intelligent communication in healthcare & hospitality, energy, and other mission-critical mobile environments. Vocera offers a comprehensive portfolio that includes Vocera Voice Communication, Secure Messaging, and Patient Experience solutions.
Key facts about Vocera
- Founded Year: 2000
- Location: San Jose (United States)
- Annual Revenue: $100M - $500M as on Dec 31, 2021
- Last Known Valuation: $*****
- Stage: Acquired
- Total Funding till date: $47.9M
- Employee Count: 297 as on Mar 31, 2026
- Investors: Cisco Investments, RRE Ventures and 10 Others
- Latest Funding Round: Post IPO, Mar 08, 2021, $*****
- Highlight: Acquired
Medsphere Systems provides open source software for the healthcare industry. It offers OpenVista, a portfolio of products and professional services for hospitals, clinics, and integrated delivery networks. It includes OpenVista Enterprise, an electronic health record solution that offers patient and health information management system, clinical information system, laboratory, pharmacy, radiology, nutrition and food service, and interface suite modules. In addition, the company offers implementation, training, support, and development services.
Key facts about Medsphere Systems
- Founded Year: 2002
- Location: Carlsbad (United States)
- Stage: Series F
- Total Funding till date: $151M
- Employee Count: 120 as on May 31, 2026
- Investors: Western Technology Investment, Hercules Capital and 12 Others
- Latest Funding Round: Conventional Debt, Oct 28, 2021, $*****
- Highlight: Editors' Pick
4. Control4
Provider of smart home automation and control systems for residences. The company delivers personalized control of lighting, music, video, comfort, security, and communications into a unified system. The platform connects smart devices, bringing them into one interface controlled from smartphones and touchscreens. The company offers solutions for residential and commercial spaces.
Key facts about Control4
- Founded Year: 2003
- Location: Salt Lake City (United States)
- Last Known Valuation: $*****
- Stage: Acquired
- Total Funding till date: $56.2M
- Employee Count: 260 as on May 31, 2026
- Investors: Sapphire Ventures, Cisco Investments and 10 Others
- Latest Funding Round: Series D, Nov 28, 2011, $*****
- Highlight: Acquired
NETSCOUT: Network visibility, cybersecurity, and DDoS protection solutions. The company provides comprehensive network visibility, cybersecurity, and DDoS protection solutions for enterprises and service providers. It offers a range of products and services, including network performance management, application performance management, remote site observability, cloud performance monitoring, and AIOps. The company specializes in cybersecurity solutions such as network detection and response, DDoS protection, and DNS infrastructure protection. It also provides solutions for 5G transformation, mobile networks, and cloud and digital transformation. The company's offerings include AI-powered DDoS protection, threat intelligence, and managed services. It supports various industries, including banking, healthcare, and telecommunications. The company's solutions leverage packet-level insights, AI, and machine learning to detect, analyze, and mitigate threats, ensuring network functions seamlessly and effectively.
Key facts about Arbor Networks
- Founded Year: 2000
- Location: Burlington (United States)
- Stage: Acquired
- Total Funding till date: $33M
- Employee Count: 1 as on Apr 30, 2023
- Investors: Cisco Investments, Summerhill Venture Partners and 9 Others
- Latest Funding Round: Series B, Aug 05, 2002, $*****
- Highlight: Acquired
Thomas Weisel Venture Partners' Investments by Stage
Thomas Weisel Venture Partners has made 9 investments in Series C stage with an average round size of $11.9M, 6 investments in Series B stage with an average round size of $13.9M and 4 investments in Series A stage with an average round size of $10.1M.Stage of entry | No. of Investments |
|---|---|
Series C | 9 |
Series B | 6 |
Series A | 4 |
Note: We have considered here, only first round of investments
Thomas Weisel Venture Partners' Investments by Sector
Thomas Weisel Venture Partners has a diverse portfolio, with companies operating in the Enterprise Applications, Enterprise Infrastructure, High Tech, Vertical SaaS and HealthTech. Notably, it has invested in 20 Tech companies, 19 Enterprise (B2B) companies, 12 Software companies and at least 7 companies focusing on Saas.Sector | No. of Investments |
|---|---|
Enterprise Applications | 12 |
Enterprise Infrastructure | 6 |
High Tech | 3 |
Vertical SaaS | 3 |
HealthTech | 2 |
Others | 12 |
Note: We have considered here, only first round of investments
Thomas Weisel Venture Partners' Investments by Geography
Thomas Weisel Venture Partners has made most investments in United States (19).Thomas Weisel Venture Partners' recent investments
Thomas Weisel Venture Partners has not made any investment in 2026 so far.Here are the most recent investments by Thomas Weisel Venture Partners:
Filter this listDate | Company | Location | Round Details | Round Amount | Co-Investors |
|---|---|---|---|---|---|
Aug 31, 2009 | United States | Series C | 9256 | ||
Jun 25, 2009 | United States | Series C | 3674 | [+5] | |
Feb 04, 2009 | United States | Series C | 7935 | [+2] | |
Apr 03, 2007 | United States | Series C | 5372 | ||
Feb 16, 2007 | United States | Series D | 3681 | [+3] |
Acquired companies in Thomas Weisel Venture Partners' Portfolio
15 companies from Thomas Weisel Venture Partners' portfolio have been acquired. The most recent acquisition was Vocera in Jan 2022 by Stryker for $*****.Here are Thomas Weisel Venture Partners' portfolio companies that got acquired most recently:
Company | Acquisition Date | First Invested on | First Round of Investment | Round Size |
|---|---|---|---|---|
Jan 06, 2022 | Oct 27, 2004 | Series C | 1421 | |
Aug 14, 2019 | May 18, 2005 | Series C | 2228 | |
May 05, 2019 | Jun 25, 2009 | Series C | 4364 | |
Jul 01, 2018 | Nov 21, 2003 | Series C | 7277 | |
Dec 02, 2015 | - | - | 6926 |
Team profile of Thomas Weisel Venture Partners
Thomas Weisel Venture Partners has a team of 5 members including 1 Partner and 4 Principals located in United States. Thomas Weisel Venture Partners' team does not sit on the board of any company as of now.Here is a list of all team members in Thomas Weisel Venture Partners:
Name | Designation | Location | Board Memberships | Contact Details |
|---|---|---|---|---|
Partner | San Francisco | - | - | |
Principal | San Francisco | - | - | |
Principal | San Francisco | - | ||
Principal | San Francisco | - | - | |
Principal | San Francisco | - | - |
Co-investors of Thomas Weisel Venture Partners
Over the past 26 years, 98 investors have co-invested in Thomas Weisel Venture Partners's portfolio companies. This includes only funds.
- Invested before Thomas Weisel Venture Partners: Cisco Investments, GGV Capital and 16 others have invested in rounds before Thomas Weisel Venture Partners. There are 2 companies where Cisco Investments has invested before Thomas Weisel Venture Partners and 1 company where GGV Capital has invested before Thomas Weisel Venture Partners.
- Top Co-investors of Thomas Weisel Venture Partners: 44 investors entered a company along with Thomas Weisel Venture Partners. These include investors like Thomas Weisel Partners (2 companies).
- Invested after Thomas Weisel Venture Partners: A total of 36 investors have invested in Thomas Weisel Venture Partners's portfolio after their investments. Top Investors include Motorola Solutions (1 company), Leader Ventures (1 company) and Sixth Street (1 company).
Recent News related to Thomas Weisel Venture Partners
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Medsphere Systems Raises $12 Million - PE HubPE Hub•Aug 31, 2009•Medsphere Systems, Azure Capital Partners, EPIC Ventures, Thomas Weisel Venture Partners and 1 other
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SpinalMotion stacks up $500K for fake spinal discs | VentureBeatVentureBeat•Feb 04, 2009•SpinalMotion, Skyline Ventures, MedVenture Associates, Thomas Weisel Venture Partners and 1 other
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Reactrix Raises $45M Series DSilicontap•Feb 15, 2007•Reactrix, Menlo Ventures, Mobius Venture Capital, Thomas Weisel Venture Partners and 1 other
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Bay Microsystems Closes $10 Million in OverPR Newswire•Nov 21, 2003•Bay Microsystems, In-Q-Tel, Selby Ventures, Needham Capital Partners and 2 others
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