20 Jan 2026
Simpson Thacher & Bartlett Adds Alison Z. Preiss to Mergers and Acquisitions Practice
"Alison Z. Preiss has joined Simpson Thacher & Bartlett's Mergers and Acquisitions Practice in New York as a Partner, focusing on M&A, corporate governance and activism defense."
Alison Preiss is a strategic M&A advisor with deep experience counseling public and private companies on mergers and acquisitions, takeover preparedness and defense, shareholder activism and other corporate governance matters. She is known for delivering innovative, commercially grounded advice in complex, high‑stakes situations and has advised on multibillion‑dollar transactions across the technology, healthcare, industrials and financial services sectors. She joins Simpson Thacher from Wachtell, Lipton, Rosen & Katz.