LionTree LLC is an American boutique investment and merchant bank that has a focus on industries related to technology, media and telecommunications (TMT).

[2][4] LionTree was founded in June 2012 by Aryeh Bourkoff, former head of UBS's investment banking in the Americas, alongside fellow UBS alum, Ehren Stenzler who joined in July 2012.

[6] During the same year, LionTree founded Ocelot Partners, a special-purpose acquisition company that focuses on investment opportunities in the European TMT sector, along with Andrew Barron and Martin E.

[4][7] In March 2018, Ocelot Partners acquired Ocean Outdoor, a U.K.-based digital billboard company, from Searchlight Capital.

[9] The investment banking unit is called LionTree Advisors and provides services such as mergers and acquisitions, capital raisings, and initial public offerings.