Mr. Sullivan has represented both private equity sponsors and management teams in leveraged buyouts and minority investments both in the United States and abroad. He regularly represents a number of leading private equity and venture capital firms, including Providence Equity Partners, Providence Strategic Growth, TA Associates, North Bridge Growth Equity (n/k/a Guidepost Growth Equity), Technology Crossover Ventures, Abrams Capital and Tower Three Partners. He has also represented a variety of corporate clients, such as Ministry Brands, Ascend Learning, Blackboard, Learfield Sports and World Endurance Holdings (Ironman).
- Providence Equity Partners and its portfolio companies in its transactions involving ANC Sports Enterprises, Archipelago Learning, Ascend Learning, AutoTrader Group, Blackboard Inc., Bluestone Television, Clarion Events, EZLinks Golf Holdings, LLC, George Little Management, Higher One Holdings, Inc., Informa plc, IPS Learning, Learfield Communications, MedHub LLC, Miller Heiman, Nelligan Sports Marketing, Professional Association of Diving Instructors (PADI), Q9 Networks Inc., RentPath, Inc., Scenario Learning, LLC, SIDEARM Sports, Soccer United Marketing, LLC, Topgolf Entertainment Group, Untangle NG Firewall, VectorLearning (now d/b/a Vector Solutions), VitalSmarts, World Endurance Holdings, Inc. and ZeniMax Media.
- Providence Strategic Growth Partners and its portfolio companies in its transactions involving Abacus Data Systems, Anju Software, Blue Star Sports, Bonzi Technology, Inc., Boston Logic Technology Partners, Inc., Burning Glass Technologies, GlobalTranz Inc., LogicMonitor, Ministry Brands, LLC, PatronManager, LLC, PaySimple Inc., Pineapple Payments LLC, Pointstreak Sports Technologies, Inc., Propertybase GmbH, ShowClix, Inc., SignUpGenius, Inc. and Skybox Security, Inc.
- North Bridge Growth Equity (n/k/a Guidepost Growth Equity) and its portfolio companies in its transactions involving Contact Solutions LLC, iMakeNews, Inc., Ingenious Med, Inc., Leapfrog Direct Response, LLC, One Source Technology, LLC (d/b/a Asurint), Proto Labs Inc., Valence Health and Verint Systems Inc.
- Summit Partners and its portfolio companies in its transactions involving Airborne, Champion Window, Commercial Defeasance, Grand Design Recreational Vehicle Company, Parts Town LLC, Uber Technologies, Inc. and Whaley Foodservice Repairs.
- Technology Crossover Ventures and its portfolio companies in its transactions involving AppNexus, Inc., Dollar Shave Club, Inc., Elevate Credit, Merkle Group Inc., SiteCore Corporation A/S, Spotify Limited, Think Finance, Inc. and Vice Media, Inc.
- Thomas H. Lee Partners and its portfolio companies in its transactions involving All Systems Holding LLC, CompuCom Systems, Inc. and Systems Maintenance Services.
- TA Associates and its portfolio companies in its transactions involving Professional Datasolutions, Inc., DataMax Consulting Corp., FireStream WorldWide, Inc., LOMOSOFT GmbH and The Pinnacle Corporation.
- Francisco Partners in its acquisition of Dynamo Software Ltd. and certain other subsidiaries and assets of Dynamo Group. Ltd.
- Ministry Brands, LLC (a portfolio company of Insight Venture Partners) in its transactions involving The ACTIVE Network Inc., Abila, Inc., Aptify Corporation and Insight Venture Partners.
- Tower Three Partners LLC and its portfolio companies in its transactions involving NTS, Inc. and the Paslin Group.
- Guggenheim Partners, LLC in its acquisition of Dick Clark Productions.
- Iron Mountain, Inc. in its sale of its online backup & recovery, digital archiving and eDiscovery solutions.
Mr. Sullivan was named 2017 “Lawyer of the Year” for Leveraged Buyouts and Private Equity Law in Boston by Best Lawyers in America. He is consistently recognized as a leading lawyer for Private Equity: Buyouts in Massachusetts by Chambers USA, where he is recognized as “the whole package,” a “fantastic strategist, an excellent practitioner and a top-end partner,” and “very smart, very capable and very reasonable.” He is also recommended for Private Equity Buyouts by Legal 500 US. He is a Private Equity Law360 editorial advisory board member.