Laurence Tosi

Business career GE and Merrill Lynch (1990s-2008) After law school, Tosi practiced litigation and corporate law at Donovan, Leisure, Newton & Irvine; and then went to work for General Electric as the director of business development for GE's CNBC and NBC divisions. He worked with GE until 1999.

He was with Merrill Lynch & Co as global head of corporate development from 1999 to 2007, where according to Reuters he "managed many of the firm's strategic acquisitions and investments." From 2004 to 2007, he was Merrill Lynch's principal accounting officer for global finance, while simultaneously working as chief operating officer (COO) of global markets and investment banking. Tosi was CFO of Merrill's trading and investment banking division until 2008,

CFO at Blackstone Group (2008-2015) In June 2008 he was hired as chief financial officer (CFO) of the Blackstone Group. He also headed the firm's Innovations Fund. It was reported in 2012 that Tosi was on a shortlist of Blackstone senior executives being groomed to potentially become CEO when Stephen Schwarzman retired. According to the New York Times, at Blackstone, Tosi along with executives such as Joseph Baratta and Jonathan D. Gray "played a crucial role in transforming the firm from a deal-driven private equity shop to a diversified asset management company."

Tosi created an internal investment trust at Blackstone, and by 2014 the trust had invested in companies such as Ipreo, moving to Silicon Valley in California. According to the Wall Street Journal, his tenure at Airbnb was "largely marked by fundraising and expansion into new geographic markets." Tosi then oversaw Airbnb's acquisition of the rental website Luxury Retreats for $300 million in 2017.

According to Bloomberg, while at Airbnb, Tosi also "quietly" created an internal hedge fund within the company's finance department, "mimicking the treasury fund he ran at Blackstone" and using a "portion of capital from the balance sheet to buy stocks, currencies, and fixed-income securities." The fund represented 30% of Airbnb's cash flow in 2017, and at that time reportedly made the company around $5 million per month. While at Airbnb, Tosi helped the startup become profitable, according to CNBC,

WestCap (2019-present) Tosi founded Weston Capital Partners, his personal investment fund, in 1997, making early investments in startup companies such as Airbnb and Tradeweb. The firm closed a US$750 million fund in 2018, and shortly afterwards, Weston Capital Partners became WestCap Investment Partners LLC, or WestCap, with Tosi as founder and managing partner. WestCap had around $9 billion in assets under management by the end of 2021. and iCapital, and he was a co-founder of Deep Sky in September 2022. Under Tosi, in 2025 WestCap invested in Addepar and the travel startup Flyr.

Boards As of 2025, Tosi is on the boards of the online travel agency Hopper Inc., the travel startup Flyr, and GoodLeap, which he joined in 2021. and as of 2025 served on one of the university's financial subcommittees.