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General Information

Phone+1-650-493-9300
Employees

Funds

Offices

HQ
650 Page Mill Rd. 94304-1050
Palo Alto, CA
USA

People

Founder and Managing Director

Tags

WS Investments

WS Investment Co. is the investment fund of law firm Wilson Sonsini Goodrich & Rosati. The fund was formed in 1978 and has been managed throughout by Mario Rosati. All fundraising is internal, with mandatory participation by partners and is occasionally opened to associates. Among other investments, the fund was a pre-IPO investor in Google, Brocade (partner Larry Sonsini contributed the options he received from his post as a director), Juniper Networks and Avanex.

Recent Milestones

Investments

Company Date Round Size Participants
T2 Biosystems 3/2013Series E$40M10
T2 Biosystems 8/2011Series D$23M10
T2 Biosystems 5/2010Series C$15M9
EMKinetics 3/2010Venture Round$2.8M1
Kythera Biopharmaceuticals 5/2008Series C$30M9
DiVitas Networks 4/2008Venture Round$15M4
AnaptysBio 11/2007Series B$33M6
Kintera 12/2006Venture Round$4.48M5
Ardian 11/2006Series B$10.1M3
Authernative 4/2006Series A$2.5M2
Atrica 4/2006Series F$22.2M9
Magnolia Broadband 1/2006Series D$14M2
Lasso Logic 7/2005Series A$4M2
Fidelis Security Systems 5/2005Series A$4.1M4

Videos

Sources

  1. T2 Bio Takes In $40M Series E for Clinical Studies and Launch of First Diagnostic (pevc.dowjones.com) [edit]
  2. T2 Biosystems closes $23M Series D financing (masshightech.com) [edit]
  3. T2 Biosystems, Inc.: Series C $15M (onbiovc.com) [edit]
  4. EMKinetics attracts $2.8M to treat incontinence (venturebeat.com) [edit]
  5. Capital Funding Report [edit]
  6. DiVitas Networks Gets $15 Million in Venture Capital (ipcommunications.tmcnet.com) [edit]
  7. AnaptysBio raises over $33 million in Series B financing (anaptysbio.com) [edit]
  8. EDGAR [edit]
  9. Ardian raises around $10.08 more for congestive heart failure (venturebeat.com) [edit]
  10. Authernative, Inc. Raises $2.5 Million in Series A Funding to Extend Its Position as Emerging Provider of User Authentication and Identity Management Solutions. (accessmylibrary.com) [edit]
  11. EDGAR [edit]
  12. MAGNOLIA BROADBAND RECIEVES $14 MILLION IN SERIES D FUNDING (magnoliabroadband.com) [edit]
  13. SonicWALL Acquires Lasso Logic, Inc. and enKoo (techstartups.wordpress.com) [edit]
  14. Fidelis Security raised $4.1 million (washingtonpost.com) [edit]
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Last Edited 1/3/14

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