Jason L. Kropp


Kropp, Jason L.

Jason Kropp is a partner in the Corporate Practice Group. He practices corporate and securities law, with an emphasis on public offerings and public company representation, and representation of venture-backed companies and venture capital investors. Mr. Kropp has successfully represented clients in a variety of complex transactions and has built a substantial practice working with local, national and international clients, advising start-ups and venture-backed companies, venture capital funds, underwriters, mature public companies and buyers and sellers in mergers and acquisitions.


A significant portion of Mr. Kropp's practice consists of counseling public companies on ongoing corporate legal matters, including federal securities reporting requirements and corporate governance issues. He represents issuers and underwriters in capital markets financings. His public offering experience includes initial public offerings, follow-on equity offerings and convertible debt offerings. Mr. Kropp also advises early stage private companies on formation and financing issues and equity and compensation matters. His venture capital experience includes representing investors and issuers in initial- and late-stage venture capital financings. In addition, Mr. Kropp represents public and private companies in mergers and acquisitions, including acquisitions of both public and private companies by public companies and financial buyers. Learn more about Mr. Kropp’s practice and how he can support your startup on

Prior to attending law school, Mr. Kropp worked as a legislative and press aide in the office of United States Representative William Delahunt, and as a legislative intern in the office of United States Representative Gerry Studds.

Honors & Awards

  • Recognized in the 2015, 2016 and 2017 editions of Chambers USA: America's Leading Lawyers for Business for his Corporate/M&A practice, with sources describing him as "really phenomenal in the corporate and securities area" and that "he has a great temperament, he's a great negotiator and he keeps his cool in situations"
  • Recognized as a 2014 Boston Rising Star by The National Law Journal, a list honoring 40 outstanding lawyers age 40 or under who "have accomplished big feats" and are also "improving their communities" 
  • Named to M&A Advisor's 2014 "40 Under 40" list
  • Named a 2013-2016 "Massachusetts Super Lawyers' Rising Star" in the area of business/corporate
  • Recognized as a 2011 "Up & Coming Lawyer" by Massachusetts Lawyers Weekly

Publications & News


August 10, 2017

WilmerHale Represents Jebbit in Raising $6.8M Series A Investment

Jebbit, a Boston-based venture-backed startup that has built the world's first declared data platform, announced that it closed a $6.8 million Series A round to continue growing its declared data platform for enterprise companies.

May 26, 2017

WilmerHale Lawyers and Practices Recognized in 2017 Edition of Chambers USA

Chambers and Partners announced its rankings for the 2017 edition of Chambers USA: America's Leading Lawyers for Business, with WilmerHale listed among the nation's best in 50 practice area categories. Chambers also ranked 86 WilmerHale lawyers as leaders in their respective fields.

May 10, 2017

Karyopharm Therapeutics Announces Pricing of Public Offering of Common Stock

WilmerHale client Karyopharm Therapeutics Inc., a clinical-stage pharmaceutical company, announced the pricing of a registered underwritten public offering of 3,902,439 shares of its common stock at a price to the public of $10.25 per share.

February 14, 2017

WilmerHale Counsels Cynosure in $1.65B Acquisition by Hologic

The WilmerHale team on the transaction was led by Hal Leibowitz and Jason Kropp and included Andrew Bonnes, Kim Wethly, Leon Greenfield, Bruce Manheim, Steve Barrett, Laura Schneider, Amy Null, Julie Hogan Rodgers, Ciara Baker, Davis Sluis, Caroline Dotolo and Alex Civetta.

October 7, 2016

WilmerHale Advises Acacia Communications in Follow-On Public Offering of Common Stock

The WilmerHale deal team was led by Partners Mark Borden, David Westenberg and Jason Kropp, and included Counsel Sarah Sellers and Associates Colin Beauvais and Julie Fogarty.

May 27, 2016

WilmerHale Lawyers and Practices Recognized in 2016 Edition of Chambers USA

Chambers USA: America's Leading Lawyers for Business announced its final rankings for the 2016 edition, with WilmerHale ranking among the nation's best in 47 practice area categories. Chambers also ranked 82 WilmerHale lawyers as leaders in their respective fields.

May 17, 2016

WilmerHale Counsels Bark & Co in Raising $60 Million in New Funding Round

WilmerHale represented Bark & Co, the company behind BarkBox, in raising $60 million in new funding to grow and expand its offerings for dogs and their people.

May 13, 2016

WilmerHale Reps Acacia Communications in IPO

WilmerHale represented Acacia Communications, a leading provider of high-speed coherent optical interconnect products, in its initial public offering.

March 24, 2016

2016 Venture Capital Report

The 2016 Venture Capital Report provides an in-depth analysis of, and outlook for, the US and European venture capital markets. The report features industry and regional breakdowns, and a look at trends in venture capital financing, convertible debt and VC-backed company M&A deal terms. We also highlight two new funding techniques that have expanded the pre-IPO financing toolkit; five common mistakes made by fledging entrepreneurs; and four things you need to know about doing business in California.

February 12, 2016

ASICS Acquires FitnessKeeper, Operator of Boston-Based Runkeeper App

ASICS Corporation today announced that it has entered into an agreement to acquire FitnessKeeper, Inc., the operator of fitness tracking app “Runkeeper”—an application that can track and record fitness activities such as running, walking and cycling through GPS on smartphone devices.

Recent Highlights

Representation of:

  • A global institutional investor in several financings of DraftKings and its merger of equals with FanDuel
  • Acacia Communications in its $119 million IPO and $450 million follow-on public offering
  • Barkbox in a $60 million funding round
  • ASICS Corporation in its acquisition of FitnessKeeper
  • Corvia Medical in its exclusive option-to-purchase transaction with an undisclosed strategic partner
  • A global institutional investor in a $1.2 billion preferred stock financing of Uber Technologies 
  • A global institutional investor in a $112 million preferred stock financing of One Kings Lane
  • A global institutional investor in an investment in Payoneer
  • Karyopharm in its $114 million follow-on public offering of common stock
  • Epizyme in its $150 million follow-on public offering of common stock
  • Demandware in its $73 million follow-on public offering of common stock
  • Endurance International Group in its $252 million initial public offering and $189 million and $264 million follow-on offerings 
  • Kiva Systems in its $775 million acquisition by
  • General Catalyst in the sale of portfolio company Locu to GoDaddy
  • ABRY Partners in its acquisition of NSM Insurance
  • NSM Insurance in its sale to American International Group, Inc. 
  • Link Medicine in its sale of neuroscience assets to AstraZeneca
  • InfoMedics in its sale to Physicians Interactive 
  • Ameresco, Accretive Health, LogMeIn, Cynosure and Eyetech Pharmaceuticals in their initial public offerings
  • Millennium Pharmaceuticals in its $8.8 billion acquisition by Takeda Pharmaceuticals
  • EqualLogic in “dual track” IPO/sale, resulting in $1.4 billion acquisition by Dell—then the largest cash purchase price in history for a private VC-backed company
  • General Catalyst Partners, Novartis Venture Fund, Matrix Partners, New Leaf Venture Partners, Sofinnova Ventures and various other financial and strategic investors in numerous private placement financings
  • Deutsche Bank Securities as lead underwriter in the initial public offering of Targacept, Inc.
  • Amdocs Limited, LIN TV Corp. and Lincare Holdings in 144A offerings of convertible notes
  • Morgan Stanley as lead underwriter in follow-on public offering of common stock by Barrier Therapeutics, Inc.
  • Lucent Technologies Inc. in its acquisition of assets of Riverstone Networks, Inc.; DoubleClick in its acquisition by Hellman & Friedman; Amdocs Limited in its acquisitions of Qpass Inc. and DSTInnovis from DST Systems, Inc.
  • Jebbit, Freight Farms, myLINGO, Rest Devices, Corvia Medical, Fractyl Laboratories, Ember Therapeutics, Blackwave, Intercept Pharmaceuticals, Link Medicine, Partsearch Technologies, Evident Software, and other private companies in various venture capital financings

Community Involvement

Mr. Kropp represents pro bono client,, an online environmental news and opinion magazine. He is also a member of the Board of Visitors of the Walnut Hill School in Natick, Massachusetts and a member of the Board of Directors of the March of Dimes, Massachusetts Chapter and Coaching4Change, whose innovative model creates opportunities for high school students to improve their math, literacy and leadership skills by turning them into coaches and teachers of younger kids.


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JD, Boston College Law School

BA, The George Washington University

Bar Admissions


New York

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