Photo of Michael  Koltonyuk

Michael Koltonyuk

Special Counsel
Washington, DC
F: +1.202.747.3351


  • J.D., Harvard Law School, 2001, cum laude, Editor, Harvard Law Review
  • M.S., Massachusetts Institute of Technology, 1998
  • B.S., Columbia University, 1995
  • District of Columbia


Michael Koltonyuk is a Special Counsel in the Corporate Practice Group in the firm's Washington, D.C. office. He is also a member of the Private Equity and Mergers and Acquisitions Teams at the firm.

Areas of Practice

Michael focuses his practice on private equity, mergers and acquisitions and general company representation.

Michael has extensive experience in structuring and negotiating domestic and cross-border transactions on behalf of both U.S. and non-U.S. clients in a wide range of business sectors, including aerospace/defense, automotive and transportation, healthcare, industrial manufacturing and technology. Michael has represented private equity firms and their portfolio companies in connection with:

  • Public and private mergers and acquisitions
  • Going private transactions
  • Carve-out acquisitions
  • Consortium arrangements
  • Joint ventures


Representative Transactions

Represented Precision Medicine Group in connection with its acquisition of ProMedDx LLC.

Represented Arlington Capital Partners in connection with its acquisition of Octo Consulting Group, Inc., a provider of mission-critical solutions for the Federal Government including software development, cloud, infrastructure, blockchain and other emerging technologies.

Representing Micropact, Inc. (a leading provider of specialized, vertically oriented case management and business process management applications for government) in its sale to Tyler Technologies, Inc. (NYSE: TYL).

Represented CACI International Inc. (NYSE: CACI) in connection with its acquisition of Mastodon Designs, an expert in design and manufacturing of rugged signals intelligence (SIGINT), electronic warfare (EW) and cyber operations products and solutions.

Represented TP ICAP plc (IAP.L) in its acquisition of Axiom Refined Products, LLC; Atlas Commodity Markets, LLC; Atlas Petroleum Markets, LLC; and Atlas Physical Grains, LLC (an energy and commodities brokerage firm specializing in crude oil, refined oil products, ethanol and physical grains).

Represented International Marine and Industrial Applicators (a marine and offshore protective coatings company that provides services primarily to the U.S. Navy) in connection with its sale to J.F. Lehman & Company, a middle-market private equity firm.

Represented Zemax, LLC (a leader in virtual prototyping software for optical product design and a portfolio company of Arlington Capital Partners) in connection with its auction sale to EQT Partners, a global investment firm

Represented CACI International, Inc. (NYSE: CACI) in connection with its acquisitions of various government contracts, joint ventures and businesses

Represented The Carlyle Group in its investment in the US$15 billion buyout of Hertz

Represented The Carlyle Group in connection with a sale of The Nature’s Bounty Co., a global manufacturer and retailer of nutritional supplements, to KKR and LetterOne

Represented The Carlyle Group in connection with its acquisition of Dutch fund-of-funds manager, AlpInvest, with approximately US$43 billion of funds under management

Represented The Carlyle Group in connection with its US$1.475 billion leveraged acquisition of Goodyear’s Engineered Products Division

Represented The Carlyle Group in connection with its US$650 million sale of Horizon Lines, the largest domestic containerized shipping company in the United States

Represented The Carlyle Group and Revolution Growth in connection with the acquisition of LDiscovery, a data collection, forensic investigation, electronic discovery and data processing company, and LDiscovery in its subsequent acquisition for approximately US$410 million of Kroll Ontrack

Represented The Carlyle Group in connection with a sale of its stake in PQ Corporation, a producer of specialty inorganic performance chemicals, high-end catalysts, and engineered glass beads, to CCMP Capital and INEOS

Represented Darden Restaurants (NYSE: DRI) in connection with a US$2.1 billion sale of its Red Lobster chain of restaurants to Golden Gate Capital

Represented Körber AG in connection with its acquisition of HighJump, a supply chain management and cloud solutions provider, from Accel-KKR

Represented D. E. Shaw in connection with the equity financing of the first off-shore wind power generation project in North America

Represented Hargray Communications, a rural cable and broadband provider, in connection with its sale to Quadrangle Group

Represented Cerberus Capital Management and Ampersand Venture in connection with the acquisition of the blood plasma business from Bayer AG