Reid is Partner at Greylock Partners, a leading venture capital firm where he focuses on early-stage investing in AI-first companies with network effects. He is also co-founder of LinkedIn (over 1 billion members), Inflection AI, and Manas AI.

Reid earned a B.S. in symbolic systems from Stanford University and a master's degree in philosophy from Oxford University as a Marshall Scholar. Before LinkedIn, he served as executive vice president at PayPal, where he was a founding board member.

Reid arranged the first meeting between Mark Zuckerberg and Peter Thiel, leading to Facebook's initial angel investment. He is author of multiple New York Times bestsellers including The Startup of You, Blitzscaling, and Superagency, and hosts the podcasts Masters of Scale and Possible.

Reid joined Greylock in 2009 and has led investments in iconic companies including Facebook, Airbnb, Aurora, and Figma. LinkedIn was acquired by Microsoft for 26.2 billion in 2016, and he currently serves on Microsoft's board of directors.

As of 2025, Forbes estimates his net worth at 2.6 billion. Greylock has invested in at least 37 AI companies, with the firm's Figma investment returning nearly 6.75 billion in 2025.