10 Arnold & Porter M&A partners
Partner and Partner, Corporate & Securities are the current titles held by these Arnold & Porter M&A partners in US offices, each of whom names mergers and acquisitions in their own practice. A reader can learn how M&A partners work at Arnold & Porter from people who have held the role.
Professionals to explore
Carlos Lobo
LinkedInExperience: Partner · Arnold & Porter
Carlos Lobo has been a Partner at Arnold & Porter since September 2023, based in New York, and the profile says Carlos Lobo focuses the practice on mergers and acquisitions (M&A), private equity investment and capital markets. Carlos Lobo was a Partner at Hughes Hubbard & Reed LLP from 2021 to 2023 and a Partner at Veirano Advogados from 2011 to 2021.
Carlyn Williams
LinkedInExperience: Partner · Arnold & Porter
Carlyn Williams has been a Partner at Arnold & Porter since January 2023, based in Denver, and the profile headline reads M&A, EC/VC and Technology Attorney at Arnold & Porter. Carlyn Williams was an Associate Attorney at Arnold & Porter from 2018 to 2023 and an Associate at Cooley LLP from 2014 to 2018.
Derek Stoldt
LinkedInExperience: Partner · Arnold & Porter
Derek Stoldt has been a Partner at Arnold & Porter since January 2017, based in New York, and the profile headline lists Co-Head of the Corporate & Finance Group, Co-Chair of Life Science Transactions and Ex-Chair of M&A at Arnold & Porter Kaye Scholer LLP. Derek Stoldt was a Partner at Kaye Scholer LLP from 1994 to 2016.
James Attonito
LinkedInExperience: Partner · Arnold & Porter
James Attonito has been a Partner at Arnold & Porter since February 2024, based in New York, and the profile says the practice draws on experience advising clients on mergers and acquisitions and general corporate matters. James Attonito was a Partner at BCLP from 2017 to 2024 and an Associate at Skadden, Arps, Slate, Meagher & Flom LLP and Affiliates from 2006 to 2011.
Lowell Dashefsky
LinkedInExperience: Partner · Arnold & Porter
Lowell Dashefsky has been a Partner at Arnold & Porter since March 2007, based in New York, and the profile describes extensive experience in structuring and negotiating mergers, acquisitions, private equity investments, divestments, joint ventures, strategic alliances and venture capital financings.
Michael Penney
LinkedInExperience: Partner · Arnold & Porter
Michael Penney has been a Partner at Arnold & Porter since January 2020, based in New York, and the profile headline reads Capital Markets and M&A Partner. Michael Penney was General Counsel, Secretary, Chief Compliance Officer at Hercules Technology Growth Capital from 2013 to 2014 and Vice President, Senior Counsel at State Street from 2009 to 2013.
Naomi M. Hartman
LinkedInExperience: Partner, Corporate & Securities · Arnold & Porter
Naomi M. Hartman has been Partner, Corporate & Securities at Arnold & Porter since January 2023, based in Washington, DC, and the profile headline reads Partner, Corporate/M&A, Arnold & Porter. Naomi M. Hartman was an Associate, Corporate & Securities at Arnold & Porter from 2014 to 2022.
Thomas Yadlon
LinkedInExperience: Partner · Arnold & Porter
Thomas Yadlon has been a Partner at Arnold & Porter since January 1998, based in New York, and the profile headline reads Co-Head of Mergers & Acquisitions at Arnold & Porter. The About section of the profile repeats the same Co-Head of Mergers & Acquisitions title at the firm.
Tracy Belton
LinkedInExperience: Partner · Arnold & Porter
Tracy Belton has been a Partner at Arnold & Porter since January 2017, based in the New York City area, and the profile headline reads Partner and Co-Chair of the M&A Practice Group at Arnold & Porter Kaye Scholer LLP. The profile describes Tracy Belton as co-chair of the firm's global Mergers & Acquisitions practice. Tracy Belton was Counsel at Kaye Scholer LLP from 2007 to 2016.
Wayne Janke
LinkedInExperience: Partner · Arnold & Porter
Wayne Janke has been a Partner at Arnold & Porter since February 2026, based in the New York City area, and describes a life sciences transactions practice guiding pharmaceutical, biotech, medical device and generics manufacturers through complex mergers and acquisitions, licensing and collaboration agreements. Wayne Janke was a Senior Associate at Arnold & Porter from 2022 to 2026 and at Reed Smith LLP from 2016 to 2022.
Choose the right perspective
Match the person's practice focus, such as private equity buyouts, life sciences transactions or public company mergers, to the question you want to explore. Weigh how long each person has been a partner and which office they work from, since that shapes the range of matters they have seen.
Questions to take into the conversation
- 01What does a typical week look like for you as an M&A partner?
- 02How has your own practice changed since you became a partner?
- 03What do you think people outside the field most often misunderstand about how a transaction gets done?
Reaching Arnold & Porter M&A partners
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About this directory
This is a professional research starting point based on business profile data retrieved on . Titles and companies reflect that source snapshot; roles marked former had ended by then. Check the linked profiles for current details. Inclusion does not imply Instant Expert membership or availability.