Uber Technologies (UBER) COO spent $5.3M buying stock on Friday. The stock was down 15% from its high.

Uber Technologies, Inc. (NYSE: UBER) President and Chief Operating Officer Andrew Macdonald spent $5.31 million buying 70,000 shares of Uber stock on September 4, 2026. The filing hit on September 8. Macdonald is not a figure who typically generates the same financial media coverage as a CEO or CFO purchase — which is why the size of this transaction deserves attention it might not automatically get.

What the filing shows

Two tranches, both open market purchases, both on September 4. The first: 54,325 shares at a weighted average of $75.6526, representing multiple transactions in the range of $75.23 to $76.22. The second: 15,675 shares at a weighted average of $76.4425, representing multiple transactions from $76.23 to $76.85. Combined: 70,000 shares at approximately $75.83 average for a total of $5,308,100. His total position after: 426,320 shares. That's a 19.65% increase in his holdings in a single transaction.

The key distinction here is what type of transaction this is. The filing codes this as "P" — open market or private purchase. Not an RSU vesting. Not an option exercise. Not a conversion of derivative securities. Macdonald wrote a check, went into the market, and bought 70,000 shares at whatever the prevailing price was on September 4. That's the form of insider buying that carries the most signal, because it involves personal capital at risk rather than compensation-related equity events that insiders have no choice about.

The price context — why $75.83 matters

Uber hit a 52-week high in the low $90s earlier this year. The stock has drifted lower across the summer, sitting at $75 to $77 on September 4 — roughly 15% below that high. The CFO, Balaji Krishnamurthy, made an open market purchase of 22,453 shares at $71.25 back in February 2026, which is now underwater relative to current prices. Macdonald's purchase is at a higher entry point than the CFO's February buy, but it comes after a visible retracement from year highs and represents a deliberate decision to add significantly to his position at current levels. Together, the two open market purchases from two of Uber's most senior executives within a single calendar year tell a consistent story about where management thinks the stock is priced relative to the underlying business.

The Q2 business context

Uber's most recent quarter — Q2 2026 — showed revenue of $14.19 billion, up 12.2% year-over-year, with EPS of $0.81 slightly ahead of the $0.80 estimate. Gross bookings grew 16% to $48.5 billion. The business has three distinct components that analysts track separately: Mobility (rides), Delivery (Uber Eats), and Freight. Mobility and Delivery are both growing, with Delivery now approaching parity with Mobility in gross bookings. Free cash flow on a trailing twelve-month basis: approximately $2.4 billion. The company has been generating meaningful free cash flow consistently — a significant change from the cash-burning operation of several years ago.

The autonomous vehicle story is the most actively debated long-term question for Uber. The company has Waymo partnerships active in three cities, with Waymo robotaxis operating through the Uber app. The bull case: Uber becomes the dominant distribution layer for autonomous rides regardless of which technology wins, collecting a margin on every AV trip booked through its platform without bearing the capital cost of the vehicles. The bear case: if AV technology reaches cost parity with human drivers, Waymo or Tesla or another vertically integrated AV operator has less reason to distribute through Uber and more reason to go direct. Macdonald's purchase doesn't resolve that debate, but it suggests the COO's view of the risk/reward is tilted toward the bull case at $75.

The comparison that matters

The insider buying signal at Uber is more straightforward than some recent cases in this space. Macdonald isn't a 10% owner buying tens of millions of shares daily like the Cascade/RSG pattern. He's not a director buying symbolically small amounts. He's the President and COO of a $155 billion market cap company spending $5.3 million of his own money at a price 15% below the year's high, three months before year-end when compensation conversations are typically underway. The scale, the role, and the timing are all consistent with genuine conviction buying rather than diversification noise or a performative signal. This is one of the cleaner insider buy signals you'll see at a large-cap company in a given year.

The one thing beginners should take away

Uber's COO spent $5.3 million in open market stock purchases on a single day, at prices 15% below the year's high, after the CFO made a similar open market purchase in February. Neither man had to buy. Both chose to. At a company generating $14 billion in quarterly revenue and $2.4 billion in annual free cash flow, with an active AV partnership expanding to new cities, the management team's personal capital is telling you how they read the current valuation. Whether you agree with that read depends on your view of Uber's autonomous vehicle positioning over the next decade. But the signal itself — the President and COO writing a $5.3 million check — is about as direct as insider buying gets.