David A. Westenberg

About David A. Westenberg

David Westenberg is a partner in WilmerHale’s Corporate and Capital Markets Practice Groups. He has focused on the software, Internet and information technology industries for more than twenty years, guiding numerous start-up clients from formation through venture financing and on to successful acquisitions or IPOs. As outside corporate counsel to many public and private companies, David advises clients on a wide variety of corporate, securities, disclosure and governance matters. His transactional experience includes more than 50 IPOs and other capital markets transactions, as well as a large number of venture capital financings and M&A transactions. He is the author of Initial Public Offerings: A Practical Guide to Going Public (Practising Law Institute), a comprehensive yet practical guide to the IPO process that was dubbed the “bible of the IPO market” by The New York Times (The Deal Professor, January 19, 2010).

Experience

1. Partner

   WilmerHale

   Jan 1983 — Present

   David’s recent client transactions include: • Dynatrace\'s $655 million IPO and follow-on public offerings raising $3.88 billion (underwriters’ counsel)• EverQuote\'s $84 million IPO• $90 million IPO of Casa Systems• Blue Apron\'s $300 million IPO and $37 million follow-on public offering• Acacia Communications’ $119 million IPO and $517 million follow-on public offering• Sale of Gilt Groupe to Hudson’s Bay Company for $250 million• HubSpot’s $144 million IPO and $167 million follow-on public offering (underwriters’ counsel) • Imprivata’s $86 million IPO (underwriters’ counsel) • Endurance International Group\'s IPO raising $252 million and follow-on public offerings raising $479 million • Late-stage and crossover financings for various clients• SS & C Technologies Holdings’ IPO and follow-on public offerings raising more than $1.4 billion • Bottomline Technologies’ follow-on public offerings of common stock and convertible senior notes raising more than $250 million• Kiva Systems’ acquisition by Amazon.com for $775 million• Brightcove’s IPO raising $63 million (underwriters’ counsel) • Tangoe’s $101 million IPO and $170 million follow-on public offering • Accretive Health’s $138 million IPO and $175 million follow-on public offering• Netezza’s acquisition by IBM for $1.7 billion• “Dual track” IPO/sale for EqualLogic, resulting in $1.4 billion acquisition by Dell—the largest cash purchase price in history for a private VC-backed company• \"Dual track\" IPO/sale for McLeodUSA, resulting in $557 million acquisition by PAETEC Holding • Sale of MapInfo to Pitney Bowes for $472 million • Cynosure\'s IPO raising $86 million• Sale of MatrixOne to Dassault Systèmes for $408 million • Avid\'s acquisitions of M-Audio for $175 million and Pinnacle Systems for $462 million • Prodigy\'s IPO (then the largest Internet company IPO in history) and its $1.6 billion strategic transaction with SBC Communications

Education

• Harvard Law School

  JD

  1980 — 1983

• Massachusetts Institute of Technology

  SB

  1976 — 1979