Sidley has hired Timothy FitzSimons as a partner in its M&A and Private Equity group in Chicago, adding a veteran deal lawyer with more than two decades of experience advising on public and private M&A transactions totaling more than $200 billion.
FitzSimons joins from King & Spalding, where he was a partner in the firm’s Corporate practice. His work spans complex public-company and private-company transactions, including tender offers, carve-outs, cross-border deals, stock-for-stock mergers, and deSPAC transactions. He also advises special committees and independent directors on conflict-of-interest matters, including take-private transactions, and regularly counsels boards on corporate governance.
The move continues Sidley’s recent buildout in the category, following the firm’s addition of six M&A partners in 2025 across multiple offices, and comes as Sidley highlights the scale of its global M&A and Private Equity platform, which it says includes more than 650 lawyers supporting transactions across a wide range of industries.
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“Tim is a highly respected M&A and PE lawyer with a proven track record advising clients on complex and high-stakes transactions. His deep technical experience and strong public company background make him an outstanding addition for our clients and an immediate asset to our global M&A and Private Equity team.”
Brian Fahrney, Chair, Executive Committee, Sidley
“Tim brings exactly the kind of sophisticated deal and boardroom experience our clients expect from Sidley. He has advised on many of the most prominent transactions in the market, and his arrival further strengthens our Chicago platform and our global M&A and Private Equity capabilities.”
Chris Abbinante, Co-Managing Partner, Chicago Office; Leader, Corporate Practice In Chicago; Member, Executive Committee, Sidley
