Aon plc's second quarter is the cleanest case yet for a company whose accounting earnings are growing apart from its operating earnings - and this time the split is informative rather than alarming. Total revenue rose 2% to $4.2 billion, organic revenue growth ran at 5%, adjusted operating margin expanded 70 basis points to 28.9%, and adjusted diluted earnings per share grew 9% to $3.81. The GAAP line went the other way: diluted EPS of $2.58 fell 3% against a prior-year quarter that carried an unusually low effective tax rate of 15.5%, which the company itself attributed to "a favorable impact from discrete items." Strip that discrete-item timing out and the operating story and the adjusted story point the same direction - upward. Aon's "3x3 Plan," layered on top of the multi-year Aon United restructuring, is showing up in the segment-mix margin: Human Capital operating margin moved from 9.1% a year ago to 13.4%, the largest single-segment leverage the company has printed in years.
The cash-return side of the quarter is the loudest signal. Aon repurchased $600 million of stock in the quarter, or 1.9 million class A ordinary shares at an average price of $320.77, and paid $175 million of dividends, returning $775 million in three months - more than the quarter's GAAP net income to Aon shareholders of $551 million. Management's full-year objective is "at least $1 billion" of buyback; the half already cleared $1.1 billion of buyback cost (3.4 million shares at an average $321.61), so the buyback pace is more than double the original objective. The share-count math is doing significant per-share work: weighted average diluted shares outstanding fell from 217.3 million in Q2 2025 to 213.9 million in Q2 2026, a 1.6% reduction that flows directly through the per-share metrics. Free cash flow of $483 million in the quarter was down 34% year over year on a higher cash-tax payment related to the NFP Wealth sale and working-capital timing; H1 2026 free cash flow of $846 million was still up 4% on the year-ago period, and management reaffirmed guidance of "double-digit free cash flow growth" for the full year.
The single thing to watch is whether the second half converts the H1 momentum into full-year numbers that match management's mid-single-digit or greater organic growth, 70–80 basis points of adjusted operating margin expansion, and "strong" adjusted EPS growth language. Aon exited the quarter with about $7.7 billion of remaining buyback authorization, $15.0 billion of total debt against roughly $1.3 billion of cash and short-term investments, and a stock that has pulled back roughly 8% from its late-July 52-week high to the $352 area - about 16% above its February 52-week low. At roughly 19x trailing adjusted earnings and an estimated high-teens forward multiple on the company's own "strong adjusted EPS growth" framing, the multiple is a growth multiple, and the operating beat is the case for keeping it.