McLaren Racing CEO Zak Brown sent a formal letter to the FIA this week urging regulators to close the door on shared ownership structures between Formula 1 teams before the 2026 power unit regulations take effect. The letter, confirmed by Reuters on Wednesday, arrives as Mercedes explores a minority stake in Alpine and as franchise valuations push past $2 billion following the $550 million Andretti licensing fee rejection in early 2024.

Brown, 54, has opposed multi-team ownership since at least mid-2024, when Alpine's ownership turmoil first surfaced publicly. His argument is structural: shared ownership creates incentive misalignment in a constructor championship where tenth place pays $70 million less than ninth, where power unit supply agreements already bind half the grid, and where technical data flows determine competitive advantage. The letter does not name Mercedes or Alpine specifically, but the timing is clean. Mercedes team principal Toto Wolff acknowledged in March that his organization had held preliminary conversations with Renault Group about a stake in Alpine, though no binding terms have emerged.

The strategic issue for Brown is not hypothetical. Mercedes currently supplies power units to McLaren, Williams, and Aston Martin under contracts running through 2030. If Mercedes acquires even a 20 percent stake in Alpine, four of ten teams on the grid would have direct financial or technical ties to Brackley. That concentration matters when the FIA adjudicates technical protests, allocates wind tunnel time based on championship position, or interprets cost cap violations. McLaren finished third in the 2024 constructor standings with 640 points, earning $140 million in prize money. Alpine finished eighth with 65 points and $78 million. A shared ownership structure between a top-three team and a bottom-five team creates obvious tension when those positions determine nine-figure payouts.

The ownership question also carries allocator implications. Family offices and sovereign wealth funds sizing Formula 1 stakes treat teams as differentiated assets with independent valuations. Audi paid an estimated $600 million for Sauber in 2023. Dorilton Capital acquired Williams for roughly $200 million in 2020. If multi-team ownership becomes permissible, those valuations compress. A 25 percent stake in two mid-grid teams is worth less than a 50 percent stake in one if the former structure triggers regulatory scrutiny or fan perception issues around sporting integrity. Brown's letter is therefore as much a message to the FIA as it is to potential buyers: keep the asset class clean.

Mercedes has not publicly committed to the Alpine discussions, and Alpine's ownership remains volatile. Renault Group CEO Luca de Meo told investors in February that Alpine F1 is not for sale outright but that the team needs a technical partner if it exits power unit manufacturing, a decision expected by June. Mercedes is the logical candidate. The company already produces engines at scale, already supplies half the grid, and already has Wolff, who holds a 30 percent stake in the Mercedes F1 team personally. That stake is distinct from Daimler AG's ownership, which creates its own governance complexity. Brown's argument is that adding Alpine to that structure crosses a line.

The FIA has not responded publicly to Brown's letter. The governing body last updated its team ownership rules in 2021, when it prohibited a single individual or entity from holding more than a 10 percent stake in multiple teams. That rule does not prevent a corporate parent from holding stakes in multiple teams if the ownership is structured through separate entities, which is the loophole Brown is targeting. The next FIA World Motor Sport Council meeting is scheduled for late June in Paris, where ownership governance is expected to appear on the agenda alongside 2026 technical regulations and the ongoing Andretti expansion debate.

Brown's timing is deliberate. The 2026 power unit regulations lock in supplier commitments for four years, meaning any ownership structure approved now will govern the grid through 2030. Ferrari, Red Bull Powertrains, and Renault are the only remaining independent engine manufacturers if Mercedes and Honda supply externally. If Mercedes acquires Alpine and stops supplying engines to McLaren in a future cycle, McLaren's options narrow to Ferrari or Honda, both of which already supply two teams each. That scenario puts Brown in a position where he is lobbying the FIA not just for fairness, but for his own optionality.

The next visible event is Renault's June board meeting, where de Meo is expected to confirm whether Alpine will continue manufacturing power units in-house or pivot to customer engines. If the latter, Mercedes becomes the immediate beneficiary, either as a supplier or as a stakeholder. Wolff is scheduled to appear at the FIA Sport Conference in Monaco in late May, his first public forum since the Alpine talks surfaced.