
Corporate M&A
Private Equity
Energy
Infrastructure
Shamus M. Crosby is a Partner at Simpson Thacher & Bartlett in Houston, specializing in mergers and acquisitions, joint ventures, and structured financing transactions. With a focus on the energy and digital infrastructure sectors, Shamus advises leading private equity firms on high-profile transactions involving data centers, fiber infrastructure, and sustainable energy assets. Recognized by Chambers USA and named '2025 Dealmaker of the Year' by The American Lawyer, Shamus has a proven track record in corporate transactional work. He holds a JD from the University of Texas School of Law and a BA in Economics from the University of Texas at Austin.
Private Equity and Investment Funds
Energy Transactions
Corporate Mergers & Acquisitions
Structured Financing and Capital Raising

- KKR and PSP Investments acquired the target/assets from American Electric Power in a acquisition on not available. - Deal value was 2820000000 Sector: Energy; Location: USA. - On the acquirer side, not available advised, led by Breen Haire, Shamus Crosby, Mark Kunzman, Aaron King, Andrew Kingsbury, Gavin Jaco, Craig Wickham, Kaitlyn Greening, Brian Steinhardt, Brandon Barton, Nancy Mehlman, Lina Pan, Michael Stephenson, David Rubinsky, Miles Jasper, Alisa Tschorke, Lori Lesser, Christina Breitbeil, Dennis Loiacono, Peter Guryan, Jamie Logie.
Sep 01 2025
3B
Private Equity
Partner
2021 – Unknown
Partner
2018 – 2021
Senior Associate
2017 – 2018

- I Squared acquired the target/assets from WhiteWater in a m&a on 2025-07-05. - Deal value was 55000000000 (source: AI Estimation) Ownership: minority stake; Sector: Energy; Location: USA. - Acquirer-side legal counsel was not specified.
Jul 05 2025
2B
M&A
JD, University of Texas School of Law
2009
BA in Economics, University of Texas at Austin
2005