Stephen Mandel

Stephen Frank Mandel Jr. is an American hedge fund manager, investor, and philanthropist. He founded Lone Pine Capital in 1997, after working as the managing director at Tiger Management. According to Forbes, Mandel has an estimated net worth of US$3.9 billion as of August 2022.

Explore Stephen Mandel's largest investments on Profit.com, including companies like Yandex NV, ASML Holding NV ADR, and Seagate Technology PLC, and their significance in his portfolio.

Stephen Mandel’s portfolio updates are typically published quarterly through SEC 13F filings, which provide detailed information about their holdings, including recent buys and sells. Additionally, real-time updates on insider trades are available through Form 4 filings, offering a more timely view of their trading activity.

Stephen Mandel currently invests in companies such as Yandex NV, ASML Holding NV ADR, and Seagate Technology PLC, focusing on sectors like Technology and Consumer Cyclical.

The largest holding in Stephen Mandel’s portfolio is Yandex NV, accounting for 7.19% of their total investments.

One of Stephen Mandel’s most profitable investments is Seagate Technology PLC, which has generated a return of 142.76% over the past year.

As of 27 Sep 2026, Stephen Mandel’s portfolio is valued at approximately $16.36B, based on the latest filings available on Profit.com.

Yes, you can use Profit.com to follow Stephen Mandel’s portfolio and gain insights to build your own investment portfolio.

You can follow Stephen Mandel’s portfolio updates on Profit.com, which provides notifications on the latest portfolio transactions as soon as they’re available.

Stay up-to-date with Stephen Mandel’s latest trades by following their portfolio on Profit.com. Enable notifications to receive real-time alerts on their newest buy and sell transactions.