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About Mark

Highly experienced startup and emerging company counsel 

Mark Ehrmann is a corporate lawyer who advises early-stage and maturing companies. A stand-out among Madison-area attorneys with an unusual depth and breadth of transactional experience, Mark works on all sides of emerging and established businesses as outside corporate counsel, deal, finance and securities counsel advising:

  • Research institutions that incubate startups
  • Startup and emerging companies
  • Investors in startup and emerging companies

With 20-plus years of legal experience, Mark is an effective outside counsel because most of his clients have small in-house legal staffs, and he is adept at functioning as though he is in-house counsel. The consummate team player, he brings a business approach to the legal advice he provides and actively works to break down information silos when he encounters them. Mark is also an active speaker and presenter on business topics.

Experience in Action

  • Helping emerging businesses and investors receive the legal foundation they need to grow and thrive by providing counsel on entity formation, completing agreements among founders and employees, laying the foundation for capital raising and protecting intellectual property.
  • Helping startups land the resources they need by securing angel and venture capital financing or raising capital through private securities offerings.
  • Representing emerging companies in private equity and sale transactions, across a variety of industries.
  • Representing companies, their owners and investors in a full range of corporate reorganizations, including domestic and international stock and asset acquisitions and divestitures as well as mergers and acquisitions (M&A) valued from $500,000 to $500 million.
  • As outside corporate counsel, coordinating legal representation and advice for a full range of legal needs facing emerging and mature companies.


  • Represented a large, national cellular telephone company in its initial public offering (IPO).
  • Successfully represented a startup company from initial formation through its sale of a 50% equity stake to investors for $80 million.
  • Successfully represented a health care entity in a $200 million acquisition involving a competitive auction process with complex timing and structural issues.
  • Resolved business and contract disputes for multiple companies without litigation.

Professional Recognitions

  • Best Lawyers in America® "Lawyer of the Year" (2014, 2018, 2021, 2023: Mergers and Acquisitions Law)
  • Best Lawyers in America® (2007-present: Corporate Law, Mergers & Acquisitions Law, Venture Capital Law)
  • Chambers USA® (2005-2009: Corporate/M&A)
  • Martindale-Hubbell® AV Peer Review Rated

Professional & Civic Activities

  • State Bar of Wisconsin, member
  • Milwaukee Bar Association, member
  • Dane County Bar Association, member
  • Chicago Bar Association, member
  • American Bar Association, Business Law and Health Law sections, member
  • Forward Wisconsin Inc., board chair, treasurer
  • Wisconsin Technology Council, board of directors, Executive Committee
  • National Association of College and University Attorneys, member

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