Why did Arch's combined ratio deteriorate compared with last year?

The consolidated combined ratio rose to 81.2% from 78.7%, and the ratio excluding catastrophes and prior-year development rose to 80.9% from 76.7%. The insurance segment's combined ratio was 93.4%, up 0.8 points, with higher loss ratio partly offset by lower expense ratio. The reinsurance expense ratio increased due to lower profit and sliding-scale commissions on ceded business. The mortgage segment's combined ratio ex-development rose as well, reflecting a one-time tender offer cost.

How much of the growth in premiums came from the Allianz acquisition?

Most of the insurance segment's headline growth came from the August 2024 MCE Acquisition. Gross premiums written grew 27.5% in the insurance segment, but only 3.6% excluding the acquisition. Net premiums written grew 30.7% reported, or 1.7% excluding the acquisition. Reinsurance gross premiums written grew 8.7%, with rate increases and new business contributing.

Were the quarter's earnings driven by one-time or non-operating items?

Partly. Net income of $1.227 billion included $229 million of net realized gains and $162 million of equity-method income, which management excludes from operating income. Offsetting these was an $88 million foreign exchange loss. Operating income of $979 million is the company's preferred measure of underlying performance and was broadly flat year over year.

What drove the increase in book value and what is the capital position?

Book value per common share rose 7.3% to $59.17 from March 31, reflecting strong quarterly earnings, unrealized investment gains in AOCI, and foreign currency translation. Total capital available to Arch was about $25.8 billion, and debt to total capital was 10.6%. The company repurchased about $163 million of shares during the quarter and had $637 million remaining under its authorization.

How is the new Bermuda corporate income tax affecting results?

The effective tax rate on pre-tax operating income rose to 15.2% from 9.5% a year earlier. Management attributed the increase primarily to Bermuda's new corporate income tax. Investors should expect this higher tax burden to persist and factor it into forward earnings estimates.

ARCH CAPITAL GROUP LTD. 8-K: Earnings & Results

01—Abstract

Summary

Summary of the 8-K filed July 29, 2025. Cited figures are marked; the original filing is the authoritative source.

Arch Capital Group (ACGL) reported strong second-quarter 2025 results, with net income available to common shareholders of $1.2 billion^a, or $3.23 per diluted share, producing an annualized net income return on average common equity of 22.9%.

After-tax operating income available to common shareholders was $979 million^b, or $2.58 per share, an 18.2% annualized operating return, roughly flat year over year on a per-share basis ($2.57 in Q2 2024). Top-line growth was robust: gross premiums written rose 15.1% to $6.2 billion and net premiums earned rose 21.7% to $4.3 billion, though much of the insurance segment's growth reflects the August 2024 acquisition of Allianz's U.S. MidCorp and Entertainment businesses. Profitability showed some pressure beneath the headline.

The consolidated combined ratio rose to 81.2% from 78.7%, and the combined ratio excluding catastrophe losses and prior-year development rose to 80.9% from 76.7%, driven mainly by the insurance segment (93.4% combined ratio) and a higher expense load in reinsurance from lower profit commissions. Catastrophe losses were modest at $154 million^c, and favorable prior-year reserve development of $139 million helped results. Mortgage underwriting income fell 17% as a one-time cost tied to a Bellemeade Re note tender offer and lower international originations weighed on results.

Net investment income grew 11% to $405 million^d, and a $229 million realized gain and a $162 million equity-method contribution were partly offset by an $88 million foreign exchange loss. Book value per common share increased 7.3% sequentially to $59.17, supported by strong operating cash flow and $163 million of share repurchases.

Investors should note the higher effective tax rate of 15.2%, which reflects Bermuda's new corporate income tax, and the company's continued reliance on favorable reserve development and investment gains to sustain headline earnings. Management emphasizes cycle management discipline, and the trajectory of the underlying combined ratio will be a key focus on the July 30, 2025 earnings call.

02—Key points

Key Highlights

Net income available to common shareholders of $1.227 billion ($3.23 per diluted share), a 22.9% annualized return on average common equity, versus $3.30 per share in Q2 2024.
After-tax operating income of $979 million ($2.58 per share), an 18.2% annualized operating ROE, essentially flat in per-share terms year over year.
Gross premiums written up 15.1% to $6.2 billion; net premiums earned up 21.7% to $4.3 billion, with the MCE Acquisition contributing a large share of insurance segment growth (ex-acquisition NPW growth of only 1.7%).
Consolidated combined ratio rose to 81.2% from 78.7%; ex-catastrophe and prior-year development it rose to 80.9% from 76.7%, with the insurance segment at 93.4% combined ratio.
Catastrophe losses were light at $154 million, and favorable prior-year reserve development of $139 million supported results.
Mortgage segment underwriting income fell 17.1% to $238 million, reflecting a one-time Bellemeade Re tender offer expense and lower international originations.
Book value per common share rose 7.3% in the quarter to $59.17; the company repurchased about $163 million of shares, with $637 million remaining on its authorization.

03—Questions

Frequently Asked Questions

Why did Arch's combined ratio deteriorate compared with last year?
The consolidated combined ratio rose to 81.2% from 78.7%, and the ratio excluding catastrophes and prior-year development rose to 80.9% from 76.7%. The insurance segment's combined ratio was 93.4%, up 0.8 points, with higher loss ratio partly offset by lower expense ratio. The reinsurance expense ratio increased due to lower profit and sliding-scale commissions on ceded business. The mortgage segment's combined ratio ex-development rose as well, reflecting a one-time tender offer cost.
How much of the growth in premiums came from the Allianz acquisition?
Most of the insurance segment's headline growth came from the August 2024 MCE Acquisition. Gross premiums written grew 27.5% in the insurance segment, but only 3.6% excluding the acquisition. Net premiums written grew 30.7% reported, or 1.7% excluding the acquisition. Reinsurance gross premiums written grew 8.7%, with rate increases and new business contributing.
Were the quarter's earnings driven by one-time or non-operating items?
Partly. Net income of $1.227 billion included $229 million of net realized gains and $162 million of equity-method income, which management excludes from operating income. Offsetting these was an $88 million foreign exchange loss. Operating income of $979 million is the company's preferred measure of underlying performance and was broadly flat year over year.
What drove the increase in book value and what is the capital position?
Book value per common share rose 7.3% to $59.17 from March 31, reflecting strong quarterly earnings, unrealized investment gains in AOCI, and foreign currency translation. Total capital available to Arch was about $25.8 billion, and debt to total capital was 10.6%. The company repurchased about $163 million of shares during the quarter and had $637 million remaining under its authorization.
How is the new Bermuda corporate income tax affecting results?
The effective tax rate on pre-tax operating income rose to 15.2% from 9.5% a year earlier. Management attributed the increase primarily to Bermuda's new corporate income tax. Investors should expect this higher tax burden to persist and factor it into forward earnings estimates.

04—Continue

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