Financial guaranty insurer Assured Guaranty (NYSE: AGO) beat Wall Street’s revenue expectations in Q3 2026, with revenue up 3.4% year on year to $214 million. Its non-GAAP profit of $1.94 per share was 14.2% above analysts’ consensus estimates.

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“While our September 30th shareholders’ equity per share was impacted by unrealized losses in the investment portfolio due largely to the rising interest rate environment, we achieved the highest per-share levels of adjusted operating shareholders’ equity and adjusted book value in our history.”

Revenue growth

In general, insurance companies earn revenue from three primary sources. The first is the core insurance business itself, often called underwriting and represented in the income statement as premiums earned. The second source is investment income from investing the “float” (premiums collected upfront not yet paid out as claims) in assets such as fixed-income assets and equities. The third is fees from various sources such as policy administration, annuities or other value-added services. Assured Guaranty struggled to consistently increase demand as its $947 million of revenue for the trailing 12 months was close to its revenue five years ago. This was below our standards and is a sign of poor business quality.

Long-term growth matters most, but within financials, a half-decade historical view may miss recent interest rate changes, market returns and industry trends. Assured Guaranty’s recent performance shows its demand remained suppressed as its revenue has declined by 4.7% annually over the last two years. Note: Quarters not shown were determined to be outliers because they were impacted by outsized investment gains/losses that are not indicative of the recurring fundamentals of the business.

This quarter, Assured Guaranty reported modest year-on-year revenue growth of 3.4% but beat Wall Street’s consensus estimates by 5.9%.

Net premiums earned made up 40.4% of the company’s total revenue during the last five years, meaning Assured Guaranty’s growth relied on a mix of insurance and non-insurance activities.

While insurers generate revenue from multiple sources, investors view net premiums earned as the cornerstone – their direct link to core operations stands in sharp contrast to the unpredictability of investment returns and fees.

Book value per share, or BVPS

Insurance companies are balance sheet businesses, collecting premiums upfront and paying out claims over time. The float – premiums collected but not yet paid out – is invested, creating an asset base supported by a liability structure. Book value captures this dynamic with the following calculation:

• Assets (investment portfolio, cash, reinsurance recoverables) - liabilities (claim reserves, debt, future policy benefits)

BVPS is essentially the residual value for shareholders.

BVPS is therefore an important metric to track for insurers and sheds light on business quality. While other, more commonly known per-share metrics like earnings per share, or EPS, can sometimes be lumpy due to reserve releases or one-time items and can be managed or skewed while still following accounting rules, BVPS reflects long-term capital growth and is harder to manipulate.

Assured Guaranty’s BVPS grew at a mediocre 6.8% annual rate over the last five years. BVPS growth has also recently decelerated a bit to 5.2% annual growth over the last two years (from $111.15 to $122.91 per share).

Key takeaways from Assured Guaranty’s Q3 results

Assured Guaranty delivered a solid Q3, with net premiums earned well above analysts’ consensus estimates and revenue also beating Wall Street’s consensus by a wide margin. Shares remained flat at $71.78 immediately after the results.

Assured Guaranty had a good quarter, but the latest results are only one piece of the longer-term business quality puzzle. Quality, when combined with valuation, can help determine if the stock is a buy. Read more in our full research report here (it’s free).