Shares in Vista Energy jumped in premarket trading on Monday after a regulatory filing revealed a Peter Thiel Vista Energy stake worth about $76 million, held through his hedge fund Thiel Macro LLC.
The filing, published on Friday by the U.S. Securities and Exchange Commission, showed Thiel Macro owned almost 1.2 million American Depository Shares in the Argentine shale oil producer as of the second quarter ending 30 June. Vista Energy was last seen up 5.4% in premarket trading on Monday.
Peter Thiel Vista Energy stake stands out in a U.S.-heavy portfolio
Vista is the largest independent energy company in Argentina, operating out of the Vaca Muerta formation, where it develops shale oil, and has invested over $6.5 billion in the country. The Peter Thiel Vista Energy stake is conspicuous for another reason beyond its size: according to EnergyConnects, Vista is the only non-US company listed among Thiel Macro’s disclosed holdings.
The fund’s largest disclosed position is in Amazon, where Thiel Macro held 495,000 shares valued at about $118 million. Vista comes in as the second-largest. Beyond those two, the fund also held sizeable positions in several American energy and utilities companies. Six of the fund’s seven new positions disclosed in the filing fall within the energy or utility sector, including American Electric Power, DTE Energy, First Energy, CMS Energy, Vistra, and X-Energy.
The breadth of the portfolio’s rebuild is itself a talking point. Yahoo Finance reports that Thiel Macro rebuilt its total disclosed U.S. equity portfolio to more than $400 million in the second quarter, having reported zero holdings for two consecutive quarters beforehand. The fund’s return to publicly disclosed markets, with such a sharp concentration in energy and utilities, gives the Vista position additional context as part of a deliberate sector bet rather than an isolated move.
Thiel’s deepening ties to Argentina
The investment comes against the backdrop of Thiel’s growing personal and political engagement with Argentina. Thiel relocated from the United States to Buenos Aires with his family, arriving in April, and purchased a mansion in the Argentine capital.
Since his arrival, Thiel has met several senior members of President Javier Milei’s government, including Economy Minister Luis Caputo, Deregulation Minister Federico Sturzenegger, and presidential adviser Santiago Caputo. He has also met with Milei himself. Milei has pursued sweeping economic reforms aimed at attracting foreign investment, with a particular focus on natural resources including oil, rare earth minerals, and lithium.
Argentina’s Vaca Muerta shale formation sits at the centre of that investment pitch. The region is one of the largest shale deposits outside North America, and Vista, as the formation’s leading independent operator, stands directly in the path of any surge in outside capital directed at Argentine energy. Thiel’s stake, disclosed via a standard U.S. regulatory process, puts a high-profile name behind a country that has been actively courting international investors.
For Vista, the association with a well-known investor name carries weight beyond the trading session. Six of Thiel Macro’s seven new positions in the quarter sit in the energy or utility space, and the fund’s only international holding happens to be the Argentine producer rather than any of the larger, more liquid international oil majors, which underlines how specifically the fund has oriented itself toward Vista’s particular story.
The SEC filing that triggered Monday’s premarket move covers the period ending 30 June, meaning the position was established during the second quarter. Whether Thiel Macro has added to or trimmed the holding since that date will become clearer only when the next quarterly disclosure is required.

