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About Us

Simpson Thacher is one of the world’s most respected law firms. But for us, this has never simply been a matter of size or rankings. It’s the direct result of our commitment to one founding principle.

Our success is driven by that of our clients.

Since 1884, many of the world’s largest organizations have turned to us for smart solutions to critical commercial challenges. Today, more than 1,000 lawyers in 11 global offices put the collective experience of the Firm to work for every client we serve.

Our teams start with a deep understanding of our clients’ business objectives. We share knowledge across practices and regions. We help our clients not only mitigate risk, but also discover opportunity. And each success begins with the same simple question...

How can we help you?


Simpson Thacher is home to more than 1,000 lawyers, many of whom have spent their entire careers here, collaborating on behalf of our clients.


Many of the world’s leading and most innovative companies—from finance to philanthropy and from Fortune 500 to high-tech startups—come to Simpson Thacher for trusted counsel.


From 11 offices, across 32 major practice areas and almost every industry sector, we bring the collective expertise of the entire Firm to bear on the business challenges facing each one of our clients.


We consistently rank among the world’s leading law firms in a wide variety of publications—including Chambers, Bloomberg, Refinitiv, The Legal 500, IFLR and American Lawyer.