Arch Capital Group Ltd. (ACGL) Q3 2026 earnings review
Arch Capital underwriting profit falls, but record buybacks cushion earnings
Arch Capital Group, the Bermuda-based property, casualty and mortgage insurer, saw underwriting profit fall across all three of its divisions while investment income and share buybacks cushioned per-share earnings. Total net premiums earned fell 6%, and underwriting profit dropped 19% to $702 million as catastrophe claims tripled from a year ago. However, a 25% rise in combined bond and private-fund income by our math and $1.4 billion of share buybacks held the decline in operating profit per share (excluding one-offs) to 4%.
| Net premiums written | $3,845M -3.0% from a year ago |
|---|---|
| Operating profit per share, excluding one-offs | $2.67 -3.6% from a year ago |
| Combined ratio, excluding disasters and prior-year reserve changes | 81.2% 80.5% a year ago |
| Common share buybacks | $1.43B 140% of net profit by our math |
⚖️ Verdict: ⚪ Neutral
The story is unchanged because a recovery in commercial insurance offset deeper contraction in reinsurance and mortgage. On the bright side, primary insurance sales grew 6% after adjusting for cancelled Allianz programs, and its operating cost ratio fell as technology-migration expenses faded. The bad news: reinsurance premiums shrank 9% while its underlying loss ratio worsened, and mortgage profit dropped 23% on higher delinquencies and expenses.
The question now is whether shrinking the reinsurance book protects long-term profit margins or permanently surrenders market share as competitors cut prices. If the pullback protects margins, the underlying combined ratio will hold steady; if competition overtakes it, both premiums and margins will deteriorate together. The January 2027 reinsurance renewal figures in the first-quarter report will tell.
🐂 Bull Case
Insurance Premiums Grow Again and Costs Fall
Arch's primary commercial insurance division spent the past three quarters shrinking as it walked away from unprofitable policies acquired from Allianz in August 2024 (the MCE Acquisition) and paid to move that business onto its own computer systems. Management previously indicated that those transition costs would fade in the second half of 2026.
Both the top line and the cost structure turned this quarter. Net premiums written — the policy sales Arch keeps after paying other insurers to share the risk — rose 2.7% from a year ago to $2.01 billion. Adjusting for the cancelled Allianz programs, underlying sales grew 5.8% on "strong growth in international business" and a 22.2% jump in North American general liability policies.
- Combined ratio excluding disasters and prior-year reserve changes: 89.2%, down 2.1 percentage points from a year ago
- Other operating expense ratio (overhead and technology costs): 14.4% of earned premiums, down from 15.6% in the second quarter and 14.8% a year ago
- Acquisition expense ratio (commissions paid to brokers): 19.2%, down 0.4 percentage points from a year ago
This matters because the division improved its underlying profit margin while returning to growth, and Bermuda tax credits also lowered overhead. What to watch: the insurance segment's other operating expense ratio in the fourth quarter. A reading at or below 14.5% will confirm that the Allianz computer-system costs have permanently rolled off.
Record Buybacks Exceed Profit but Trim Book Value
When insurance pricing softens and growth opportunities narrow, Arch returns excess capital to shareholders rather than writing underpriced policies. Critics of this approach note that buying back shares well above book value — a company's net asset value per share — reduces the book value of the remaining shares and leaves less capital if underwriting margins suddenly improve.
The Bermuda insurer repurchased $1.43 billion of its own stock in the third quarter, up from $1.17 billion in the second quarter and $732 million a year ago. By our math, that equalled 140% of the quarter's net profit available to common shareholders and retired about 14.6 million shares at roughly $98 apiece. For the first nine months, buybacks reached $3.38 billion, or 109% of net profit.
Those purchases cut the diluted share count by 9.2% from a year ago to 341.4 million. Because fewer shares split the profit, operating profit per share — which excludes investment sales and one-offs — fell only 3.6% to $2.67 even though total operating profit dropped 12.7% to $910 million. However, the buybacks and bond-price declines pushed book value per share down 0.2% from June to $67.90.
What to watch: fourth-quarter share repurchases in the year-end report. By our math, about $725 million remained on the April buyback authorization at quarter-end, so keeping this pace requires the board to approve a new program.
Investment Income Offsets the Underwriting Drop
"We delivered a strong quarter, driven by solid underwriting performance across our three segments and continued strength from our investment portfolio," chief executive Nicolas Papadopoulo said. Arch invests the float — the cash it holds between collecting policy premiums and paying out claims — in bonds, stocks and private investment funds.
Pre-tax net investment income from bonds and cash rose 10.5% from a year ago to $451 million as total investable assets grew to $49.2 billion and bond yields ticked up to 4.09% from 3.91% in the second quarter. At the same time, income from private funds accounted for under the equity method jumped 67.2% to $224 million, or $0.66 per share.
By our math, those two investment streams generated $675 million of pre-tax income, up $133 million from $542 million a year ago. Because underwriting profit across the three insurance divisions fell by $169 million over the same period, the investment portfolio replaced nearly four-fifths of the lost underwriting earnings. What to watch: the pre-tax investment yield in the fourth quarter. A reading above 4.0% will show that bond returns can keep cushioning underwriting margins.
🐻 Bear Case
Reinsurance Shrinks Further While Underlying Margins Slip
"We are operating in a transitioning market where conditions are increasingly uneven, but we are prepared and welcome the challenge," chief executive Nicolas Papadopoulo said. In reinsurance — where Arch insures other insurance companies — the group has been pulling back from property coverage and passing more risk to outside investors as heightened competition pushes prices down. Bulls view this pullback as disciplined risk management that protects profit margins.
The numbers show that shrinking the book has not stopped underlying margins from slipping. Reinsurance net premiums written fell 9.3% from a year ago to $1.58 billion due to "non-renewals and share reductions", even though the year-ago quarter had already dropped 10.7%. Net premiums earned — the revenue recognized in the income statement as policies run their course over five quarters — fell 10.3% to $1.81 billion.
- Reinsurance underwriting profit: $393 million, down 18.5% from a year ago
- Combined ratio excluding disasters and prior-year reserve releases: 78.4%, up 1.6 percentage points from 76.8% a year ago
- Favorable prior-year reserve releases: cut 7.0 percentage points off the combined ratio (about $126 million by our math), compared with 2.2 points a year ago
While ”higher commissions on retrocessions” (fees Arch earns when passing risk to other reinsurers) cut the underwriting expense ratio by 2.1 points to 22.4%, the underlying loss ratio still worsened. What to watch: reinsurance net premiums written in the first quarter of 2027, which captures the major January renewal season. A fifth straight decline alongside a rising underlying combined ratio would show that competition is eroding both volume and profitability.
Mortgage Profit Drops on Delinquencies and Costs
Arch's mortgage segment insures home loans for lenders and government-backed housing agencies, providing a steady profit stream that usually cushions the swings of property and casualty insurance. That cushion thinned noticeably this quarter as underwriting profit fell 22.7% from a year ago to $201 million and net premiums earned declined 10.3% to $270 million.
Both claims and operating costs moved against the division. The combined ratio — total claims and expenses as a share of earned premiums — rose 12.0 percentage points from a year ago to 25.5%. Excluding reserve releases from older years, the underlying combined ratio jumped 8.9 points to 41.6%.
On the claims side, the current-year loss ratio rose 4.7 percentage points by our math to 22.3% on "a modestly higher level of delinquencies", while reserve releases from homeowners catching up on missed payments shrank to 15.4 points from 18.1 points a year ago. Meanwhile, the underwriting expense ratio rose 4.6 points to 18.6% because of "lower ceding and profit commissions" and lower earned premiums. What to watch: the mortgage current-year loss ratio next quarter. A move above 25% would signal that missed mortgage payments are eating into Arch's most reliable cash generator.
Catastrophe Claims Rise and War Losses Stay Unquantified
Arch faces peak weather and geopolitical exposure in the second half of the year, and for two quarters investors have asked management to specify its losses from the conflict in Iran. In the third quarter, pre-tax catastrophe losses across insurance and reinsurance more than tripled from a year ago to $234 million, up from $72 million in last year's unusually quiet third quarter.
Disasters added 6.9 percentage points to the reinsurance loss ratio and 5.7 points to the insurance loss ratio. Arch noted that the insurance tally includes "losses related to the Iran conflict" and that the balance of the loss-ratio increase came in part from "incremental earned premium in the quarter resulting from the Iran conflict", but the release again gave no dollar figure for the war claims.
Through nine months, catastrophe losses total $609 million by our math. What to watch: any specific dollar disclosure of Middle East war losses on the conference call or in the quarterly filing, and fourth-quarter catastrophe claims. By our math, management's prior annual catastrophe allowance of 6% to 8% of earned premiums leaves roughly $345 million to $665 million of potential disaster losses for the fourth quarter.
Risks this quarter didn't answer
Four standing concerns from prior quarters cannot be checked from the earnings release or financial supplement because their disclosures live in the quarterly filing or on the conference call.
- Casualty reserve adequacy by underwriting year: reinsurance released 7.4 points of prior-year reserves overall, but the filing's reserve footnote is needed to see whether 2022–2023 liability policies suffered further adverse development.
- Litigation loss contingency: net realized losses were $99 million this quarter; the filing's footnote on realized losses will show whether the unquantified litigation charge from the first half grew or settled.
- Bermuda deferred tax asset: last valued at $1.2 billion with a risk of write-off in late 2026 or 2027; the filing's tax footnote will show its carrying value.
- Affiliated reinsurer concentration and put options: total reinsurance recoverables rose to $10.25 billion; the related-party note in the filing will show the balance owed by Somers and whether the $163 million Greysbridge share buyback closed.
👓 Other Themes
Higher Interest Rates Push Total Investment Return Below Zero
While higher bond yields lifted Arch's cash investment income, rising market interest rates during the third quarter pushed down the market value of the bonds it already owns. Total return on investments — which combines cash income with realized and unrealized price changes — turned negative at -0.42%, compared with +1.62% in the second quarter and +1.80% a year ago, due to the "impact of rising interest rates on fixed income securities", cutting $657 million from shareholders' equity via unrealized bond losses.
💲 Other KPIs
Shrinking as reinsurance policy volume contracts: net unearned premiums — cash collected for policy coverage that will be recognized as revenue over the next year, after subtracting risk passed to other insurers — fell $173 million from last quarter and 4.9% from $8,045 million a year ago by our math, pointing to lower earned revenue ahead.
Fell 19.5% from last year's $2,186 million, though up from $1,322 million in the second quarter and $1,188 million in the first. Lower premium collections and higher tax and claim payments reduced the cash inflow, though the business still generated enough cash to fund $1.43 billion of share buybacks.
Rose 13.0% from $9,070 million a year ago by our math, moving in the opposite direction of Arch's own net premiums earned, which fell 6.3%. Reinsurance recoverables are claims owed to Arch by other insurers that took on a share of its policies; the balance has climbed every quarter this year as Arch passes off more risk.
🔮 Guidance
Unchanged. Management previously indicated on the second-quarter call that interest costs would run $60 million to $63 million in both the third and fourth quarters following June's $2.0 billion debt offering. Third-quarter interest expense landed right in the middle at $62 million, up from $44 million in the second quarter and $37 million a year ago.
❓ Key Questions
How large were the Iran conflict losses in dollars?
The release states that the insurance division's 5.7 points of disaster claims include losses and extra premiums from the Iran conflict, but gives no dollar breakdown. Investors need the exact claim and reserve figures to judge how much risk remains if the conflict continues.
Did 2022–2023 casualty reserves worsen again this quarter?
Reinsurance released $126 million of prior-year reserves overall by our math, but last quarter hid $26 million of extra losses on 2022–2023 liability policies inside a positive total. The split between short-term property savings and long-term liability claims shows whether court awards are still outpacing estimates.
Will the board approve a new share buyback program?
Arch spent $1.43 billion on buybacks in the third quarter, leaving roughly $725 million on its April authorization by our math. Because the 9.2% share-count reduction is carrying per-share profit while underwriting shrinks, a slowdown in buybacks would immediately expose the earnings drop.
What caused the jump in mortgage expenses and delinquencies?
The mortgage division's underlying combined ratio rose 8.9 percentage points to 41.6% as delinquencies ticked up and profit commissions fell. Because neither the release nor the supplement includes the mortgage delinquency rate or credit-score tables this quarter, investors need those figures from the call.