
Axinn Veltrop & Harkrider is a specialist antitrust boutique that is regularly instructed on complex, cross-border merger reviews for major corporates and private equity sponsors. The team remains active on large-cap deals that attract close scrutiny from US agencies, and is frequently engaged on matters involving Second Requests and litigation risk alongside multijurisdictional filings. In Washington DC, practice chair Michael Keeley is regularly instructed on high-stakes merger reviews and contested clearance matters, while Jeny Maier advises on merger clearance from deal structuring and notification strategy through agency review, investigations and remedies. Also in DC are Leslie Overton, who draws on senior DOJ Antitrust Division experience to support clients facing heightened scrutiny, and Craig Minerva who focuses on early risk assessment and clearance strategy. In New York, John Harkrider boasts an extensive track record on some of the market’s most consequential transactions and a regular role on matters facing serious enforcement risk., while Lisl Dunlop is a go-to on healthcare transactions.
Legal 500 Editorial commentary
Key clients
- AssuredPartners, a portfolio company of GTCR
- Worldpay LLC
- Thermo Fisher Scientific
- McKesson
- First Advantage Corp.
- Park Place Technologies
- RB Global
- Boyd Group Services Inc.
- Dedrone
- Berkshire Partners
Work highlights
Represented AssuredPartners, a portfolio company of GTCR, as lead antitrust counsel in connection with its $13.45 billion sale to Arthur J. Gallagher & Co.
Serving as global coordinating counsel in the proposed $24.5 billion acquisition of Worldpay LLC by Global Payments.
Advising Thermo Fisher Scientific in its pending $9 billion acquisition of Clario Holdings, a global leader in endpoint data solutions for clinical trials.
Lawyers
Leading partners
The strongest partners in their field, leading on market-leading deals and endorsed by peers and clients alike.

Practice head
Michael Keeley
Other key lawyers
John Harkrider; Nicholas Gaglio; Bradley Justus; Lisl Dunlop; James Attridge; Leslie Overton; Jeny Maier; Craig Minerva
