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, Thomas H. Lee Partners, Summit Partners, Technology Crossover Ventures, Abrams Capital and Tower Three Partners. He has also represented a variety of corporate clients, such as Iron Mountain, Verizon, Archipelago Learning, 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, 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., SIDEARM Sports, Topgolf Entertainment Group, Untangle NG Firewall, VectorLearning, VitalSmarts, World Endurance Holdings, Inc. and ZeniMax Media.
- Providence Strategic Growth Partners and its portfolio companies in its transactions involving Abacus Data Systems, ACTIVE Network, Anju Software, Blue Star Sports, Bonzi Technology, Inc., Burning Glass Technologies, GlobalTranz Inc., LogicMonitor, Ministry Brands, LLC, Pointstreak Sports Technologies, Inc. and Skybox Security, Inc.
- North Bridge Growth Equity and its portfolio companies in its transactions involving Contact Solutions LLC, iMakeNews, Inc., Ingenious Med, Inc., Leapfrog Direct Response, LLC, 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 and Uber Technologies, Inc.
- Technology Crossover Ventures and its portfolio companies in its transactions involving AppNexus, Inc., Dollar Shave Club, Inc., 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 Management in its acquisition of Professional Datasolutions, Inc.
- 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 and for Private Equity: Buyouts by Legal 500 US.