AerCap Shorts Cut in Half as Q3 Results Land

AerCap Holdings posted its Q3 results on October 28, and the most striking data shift around the event is not in the options market or on the analyst tape: short interest dropped 31% in a single week, cutting the short book almost in half just as the world's largest aircraft lessor reported earnings.

Short interest fell from roughly 3.75 million shares to 2.56 million, bringing it to 1.54% of the free float. That is a sharp move. A month ago the short book stood closer to 3.4 million shares. The borrow market tells the same story: availability is effectively uncapped, with 60 million shares available to lend against a short position of under 3 million. Borrow costs ticked up slightly on the week to 0.53%, but remain low in absolute terms, and the ORTEX short score dropped from 34 to 30.8 between October 14 and October 27, its lowest reading in the window. Whoever held the bearish position coming into earnings was largely closing it out before the results landed.

Options positioning offers a mild contrast. The put/call ratio of 0.50 is barely a quarter of a standard deviation above its 20-day average. Its 52-week range runs from 0.23 to 0.83, which puts the current reading squarely in the middle. That is not a market pricing in stress. The stock itself gained 3.9% over the past week to close at $150.05, outpacing the median of its closest peers: WLFC gained 7.5% and GATX 3.6%, while MACF slipped 2.3%.

The Street remains broadly constructive, though the analyst data is now a few weeks old. TD Cowen raised its target to $185 on October 12, maintaining a Buy. The mean target across the coverage universe is $179.80, implying around 20% upside from the current price. Morgan Stanley holds a more cautious Equal-Weight stance with a $165 target. The bull case rests on AerCap's scale and its ability to generate durable gains from aircraft sales, the company sold 52 owned aircraft in the most recent quarter, alongside buybacks and a lean cost structure. The bear case points to the fundamental leverage of the model: the company borrows heavily to own aircraft it then leases, and a tightening of capital market access or a deterioration in airline credit would pressure both the asset values and the income stream. Valuation is not stretched on a reported-earnings basis, with a trailing PE near 8.2x and a price-to-book of 1.09x, though the earnings yield factor score ranks in the 92nd percentile and days-to-cover ranks 83rd, both pointing toward a stock the market treats as cheap relative to its cash generation.

On ownership, CEO Aengus Kelly holds 4.3% of shares, last reported as of May. BlackRock added around 810,000 shares in the quarter to September 30, bringing its stake to 8.9%. Eagle Capital Management trimmed its position below the 5% disclosure threshold earlier this year, filing a 13G/A showing 4.38% as of May, down from 5.97%. No 13D activist is on the register. Insider activity over the 90 days to August 6 was net negative, with the CFO selling over $10 million in May and a director selling a further $311,000 in August, though the significance scores on each were low.

The next data point that matters is what management said on the earnings call about fleet delivery timelines and lease rate trends: the analyst community will update targets in the coming days, and those revisions, rather than the short book, are the number most worth tracking as the gap between price and target gets put to the test.