Billionaire Bill Ackman’s Pershing Square Capital Management Has 12.7% of Its Portfolio Invested in This Beaten-Down Stock

Uber's Q2 revenue rose 12% year over year to $14.19 billion but missed estimates, while Q3 gross-bookings guidance also came in below consensus; operating income nevertheless increased 30% to $1.9 billion and adjusted EPS rose 35% to $0.81. Shares are down 14% year to date and 29% over the past 12 months amid concern that autonomous vehicles could disrupt ride-hailing. Uber is pursuing an offsetting autonomous strategy through Waymo integration and a Rivian agreement for up to 50,000 autonomous vehicles, supported by up to $1.25 billion of investment, with robotaxi deployment targeted from 2028.

Analysis

UBER's investable issue is not near-term adoption of robotaxis but the eventual allocation of autonomous ride economics. Its marketplace, demand data, payments stack and rider acquisition can retain value as a distribution layer, yet autonomous fleet owners and software providers will seek a larger share of gross bookings once supply is scarce. The critical KPI over the next 1-3 quarters is whether Mobility take rate and contribution profit continue expanding despite softer bookings guidance; growth in trips without take-rate durability would indicate emerging pricing pressure rather than an accounting-driven revenue issue.

The Rivian arrangement creates a potentially material capital-intensity risk before it creates earnings. A $1.25B commitment plus fleet-related funding can dilute UBER's asset-light valuation if commercialization slips beyond 2028, while RIVN gains a demand-side validation that could support utilization and residual-value assumptions. The non-obvious beneficiary is Waymo/Alphabet: Uber provides customer acquisition and dispatch density without requiring Waymo to immediately solve consumer distribution, strengthening Waymo's negotiating leverage when partnership economics are reset.

Consensus likely overstates the binary disruption narrative: autonomy initially faces geographic, regulatory, insurance and fleet-deployment constraints, making a multi-network marketplace more useful rather than less useful. But the current valuation support should come from demonstrated FCF and operating leverage, not a distant robotaxi margin windfall. A sustained deceleration in gross bookings, Mobility contribution margin, or active consumers would make the 'platform toll collector' thesis materially weaker well before autonomous fleets reach scale.

Key Decisions for Investors

• Maintain UBER as a watch-list long rather than add solely on price weakness; initiate only after the next earnings release confirms gross-bookings reacceleration and stable-to-higher Mobility take rate. Thesis horizon: 6-18 months; invalidate on a guidance cut or two consecutive quarters of contribution-margin compression.
• Use a defined-risk pair for the autonomy-distribution thesis: long UBER / short RIVN in equal volatility weights over 6-12 months. UBER monetizes demand density today, while RIVN carries execution, manufacturing and autonomous-commercialization funding risk; cover the short if Rivian demonstrates material positive gross-margin/FCF inflection or secures additional high-volume fleet commitments.
• Do not underwrite 2028 robotaxi profits into UBER estimates until disclosure clarifies vehicle ownership, depreciation exposure, insurance liability and revenue share. Set an event alert for fleet-financing details or a revised deployment timetable; those terms determine whether autonomy is margin accretive or simply shifts driver cost into capex.
• For existing UBER exposure, hedge the next earnings event with short-dated downside puts rather than reducing a strategic position if implied volatility is below the stock's post-results move range. The immediate risk is guidance credibility and bookings sensitivity; the structural autonomy debate is unlikely to resolve in a single quarter.