AIG's $145 Million Reserve Release Comes With an Excess Casualty Catch

AIG booked $145 million of net favorable prior-year reserve development in the second quarter of 2026, up from $112 million a year earlier. That pushed its General Insurance accident-year combined ratio to 88.1% (AIG, SEC Form 8-K, August 6, 2026).

The release came from workers' compensation and property. US excess casualty moved the other way, with slight reserve strengthening in the same quarter. Favorable in the short tail, adverse in the long one.

Key Takeaways

• $145 million of net favorable prior-year development, up from $112 million, out of workers' compensation and property, while US excess casualty strengthened slightly in the same quarter.
• North America Commercial's combined ratio improved 190 basis points to 84.0% while its accident-year combined ratio rose 50 basis points to 86.7%, on business mix and property rate pressure.
• International Commercial lost a third of its underwriting income, to $200 million from $300 million, while net premiums written grew 11% to $2.6 billion.
• AIG used an adjective, not a number. Everest and CNA attached dollar figures to their casualty and mass-tort builds; a movement management is watching but not quantifying reads differently.
• $904 million returned to shareholders, $641 million of it buybacks, which is not the capital posture of a carrier bracing for a reserve charge.

The Print, and the Corebridge Asterisk

The headline combined ratio of 89.0% improved 30 basis points from 89.3%, "largely due to higher favorable PYD and an improved expense ratio, partially offset by higher catastrophe-related charges." Catastrophe charges rose to $210 million from $170 million, or 3.4 loss ratio points. That includes $75 million of net losses tied to the Middle East conflict.

General Insurance underwriting income reached $686 million, up 10%, on $7.5 billion of net premiums written, up 9%. Adjusted after-tax income per diluted share reached $2.00, up 10%. Net income per diluted share fell to $1.78 from $1.98, which AIG attributed to fair-value swings on its remaining Corebridge Financial stake and other equity securities rather than to underwriting.

AIG sold that remaining Corebridge interest on May 7 for roughly $710 million, closing the multi-year unwind of its former life and retirement subsidiary. Net investment income fell to $1.127 billion from $1.466 billion as a result. Book value per share rose to $77.39 from $74.14, and return on equity slipped to 9.4% from 11.0%. Core operating ROE, which strips the Corebridge and portfolio noise, held at 11.1%.

Eric Andersen succeeded Peter Zaffino as president and CEO on June 1, 2026 (Insurance Journal, January 6, 2026). He framed the quarter against a shifting market: results "demonstrate our ability to perform well in the current market, which has transitioned from an extended phase of broad positive pricing into a more selective environment."

Three Segments, Three Reserve Stories

Segment	Combined ratio	Change	AYCR, as adjusted	AYCR change	Underwriting income
North America Commercial	84.0%	−1.9 pts	86.7%	+0.5 pts	$372M (+24%)
International Commercial	91.3%	+5.4 pts	87.3%	+2.3 pts	$200M (−33%)
Global Personal	92.9%	−5.6 pts	91.2%	−4.9 pts	$114M (+356%)

North America Commercial, which houses the US excess casualty book, is where the tension sits. Its combined ratio improved 190 basis points to 84.0% on higher favorable development, lower catastrophes and a lower expense ratio. Its accident-year combined ratio strips both catastrophes and prior-year development to isolate the current period's own pick. That figure moved the other way, rising 50 basis points to 86.7% on "higher acquisition ratio and AYLR due to changes in business mix, in addition to rate pressure, particularly in Property."

Underwriting income in the segment still climbed 24% to $372 million on 9% premium growth to $3.1 billion, so nothing reads as distress. It reads as a headline ratio raised by reserve release and a lighter catastrophe quarter while the segment's own current-year loss ratio moved against it. That is the mechanism Chubb's North America Commercial segment showed a month earlier, where the segment combined ratio worsened to 85.4% while the consolidated number improved on releases concentrated outside US commercial casualty.

International Commercial had the weaker quarter, and reserves are not the reason. Underwriting income fell 33% to $200 million from $300 million even as net premiums written grew 11% to $2.6 billion, and the combined ratio worsened 540 basis points to 91.3%. The accident-year figure moved from 85.0% to 87.3%, a 2.3-point deterioration separate from and prior to the catastrophe load, concentrated in financial lines. A segment growing premium by double digits and still losing a third of its underwriting income has a pricing and catastrophe problem, not a reserving one.

Global Personal is the segment where the improvement is neither reserve-driven nor catastrophe-driven. Its combined ratio improved 560 basis points to 92.9% and its accident-year combined ratio improved 490 basis points to 91.2%, on lower loss and acquisition ratios reflecting earn-in of improved High Net Worth commission terms. No material prior-year development ran through it, so renegotiated distribution economics are doing the work the reserve line did elsewhere.

An Adjective Where Peers Used a Number

Carrier	Net prior-year development	Primary driver
Travelers	+$578M favorable	Workers' comp and property; no pressure reported in umbrella or commercial auto
Chubb	+$283M favorable	Concentrated in personal lines and international, not North America commercial casualty
AIG	+$145M favorable	Workers' comp and property/special risks; slight strengthening in U.S. excess casualty
Everest	−$200M adverse	North America casualty treaty, older accident years
CNA	−$77M adverse (after-tax)	Legacy mass tort, second consecutive year

AIG's $145 million net favorable print puts it in the release column, but the composition looks nothing like Travelers' $578 million or Chubb's $283 million. It resembles Hartford's quarter. There, a four-point sequential combined-ratio improvement sat over $46 million of adverse general liability and $26 million of adverse commercial auto liability development in the 2023 and 2024 accident years, funded by more than $110 million of favorable workers' compensation development.

The disclosure choice is itself a data point. Everest attached roughly $200 million to its North America casualty treaty strengthening and CNA attached $77 million after tax to its legacy mass-tort charge. AIG used the word "slight" and no dollar figure. A build worth naming in a release gets a number; a movement management is watching but has not sized gets an adjective. That places AIG's excess casualty book one quarter and one materiality threshold behind the carriers that acted.

Book mix explains why the same underlying signal would show up smaller here. Everest's strengthening sits in North America casualty reinsurance, which aggregates losses across many primary cedents and is mechanically more exposed to a handful of adverse jurisdictions or large-account claims. AIG writes excess casualty as a primary or lead-umbrella insurer across a broad portfolio, which dilutes any single adverse claim or venue far more than a treaty does. The same loss-cost signal would be expected to arrive smaller and later in a primary excess book.

Excess casualty picks are set years before claims mature, so a movement small enough to describe only in adjectives either resolves to noise by the annual long-tail review or becomes the seed of a later action. CNA's second consecutive mass-tort charge is what the second path looks like on a different exposure.

Capital return points the other way. AIG returned $904 million in the quarter, $641 million of buybacks and $263 million of dividends, with diluted shares falling to 533.5 million from 577.9 million. That is the posture of a carrier not expecting a nine-figure finding, and it matches Everest pairing a $200 million strengthening with $585 million of operating income and continued repurchases. The unresolved part is whether AIG's excess casualty pick has been running as conservative as the peers whose releases came from elsewhere in the book, or whether the slight strengthening is the first movement in it.

Further Reading on actuary.info

• P&C Q2 2026 Casualty Reserves: Chubb and Travelers Release While Everest and CNA Build - The four-carrier split this AIG print now extends to five.
• Chubb's 83.8% Combined Ratio Meets a Softening Casualty Book - The same headline-improvement-masks-commercial-segment pattern AIG's North America Commercial segment repeats.
• Hartford Q2 2026: Short-Tail Releases Fund a Casualty Reserve Build - The closest structural match to AIG's own workers' comp release funding a quiet excess casualty signal.
• CNA's Flat P&C Reserves Hide a $77 Million Legacy Mass-Tort Charge - How a small, adjective-scale signal in one year can become a named charge the next.
• Social Inflation and the Casualty Loss Development Factor Adjustment - The loss-trend mechanics behind why excess casualty picks lag rate and loss-cost shifts by several accident years.
• Berkshire's $869M Reserve Release Hides a Casualty Build - AIG's $145M net favorable print with excess casualty strengthening reads the same way as Berkshire's own blended reinsurance-segment figure.
• The data center capacity strain behind AIG's growth talk – where the quarter's underwriting strength gets deployed.