Sifting through countless of stocks in the Insurance industry can be tedious, and sometimes two stocks are just too similar to judge which is the better investment. If you’re on the fence about investing in American International Group, Inc. or W. R. Berkley Corporation because you’re not sure how they measure up, it’s important to compare them on a few factors before making your decision.

Read on to learn how American International Group, Inc. and W. R. Berkley Corporation compare based on key financial metrics to determine which better meets your investment needs.

About American International Group, Inc. and W. R. Berkley Corporation

American International Group, Inc. provides insurance products for commercial, institutional, and individual customers in North America and internationally. It operates through three segments: North America Commercial, International Commercial, and Global Personal. The company offers commercial and industrial property insurance, including business interruption and package insurance that cover exposure to made and natural disasters; general liability, environmental, commercial automobile liability, workers’ compensation, excess casualty, and crisis management insurance products; risk-sharing and other customized structured programs for large corporate and multinational customers; professional liability insurance; and marine, energy-related property insurance products, aviation, political risk, trade credit, and trade finance products. It also provides group personal accident and business travel products for employees, associations, and other organizations; voluntary and sponsor-paid personal accident and supplemental health products for individuals; and personal auto and homeowners in selected markets, comprehensive extended warranty, device protection insurance, home warranty and related services, and insurance for high net-worth individuals. In addition, the company offers mortgage and other loans receivable, such as commercial mortgages, life insurance policy loans, commercial loans, and other loans and notes receivable. American International Group, Inc. was founded in 1919 and is headquartered in New York, New York.

W. R. Berkley Corporation, an insurance holding company, operates as a commercial line writer worldwide. The company operates through Insurance and Reinsurance & Monoline Excess segments. The Insurance segment underwrites commercial insurance business, including excess and surplus lines, admitted lines, and specialty personal lines. This segment also provides accident and health insurance and reinsurance products; insurance for commercial risks; casualty and specialty environmental products; insurance coverages for fine arts and jewelry exposures; excess liability and inland marine coverage for small to medium-sized insureds; and commercial general liability, umbrella, professional liability, directors and officers, commercial property, and surety products, as well as products for technology, and life sciences and travel industries. In addition, it offers cyber risk solutions; crime and fidelity insurance products; medical professional coverages; workers’ compensation insurance products; management liability and general insurance products; personal lines insurance solutions, including home, condo/co-op, auto, fine arts and collectibles, liability, collector vehicle, and recreational marine; law enforcement, public officials and educator's legal, and employment practices liability, as well as incidental medical, property, and crime insurance products; at-risk and alternative risk insurance program management services; professional liability; energy and marine risks; and insurance products to the Lloyd's marketplace. The Reinsurance & Monoline Excess segment provides treaty and facultative reinsurance solutions; property and casualty reinsurance products; facultative reinsurance products include automatic, semi-automatic, and individual risk assumed reinsurance; and turnkey products, such as cyber, employment practices liability insurance, liquor liability insurance and violent events. The company was founded in 1967 and is headquartered in Greenwich, Connecticut.

Latest Insurance and American International Group, Inc., W. R. Berkley Corporation Stock News

As of September 2, 2026, American International Group, Inc. had a $39.8 billion market capitalization, compared to the Insurance median of $7.3 million. American International Group, Inc.’s stock is down 10.2% in 2026, up 0.3% in the previous five trading days and down 6.07% in the past year.

Currently, American International Group, Inc.’s price-earnings ratio is 14.0. American International Group, Inc.’s trailing 12-month revenue is $26.7 billion with a 11.1% net profit margin. Year-over-year quarterly sales growth most recently was 0.5%. Analysts expect adjusted earnings to reach $8.043 per share for the current fiscal year. American International Group, Inc. currently has a 2.6% dividend yield.

As of September 2, 2026, W. R. Berkley Corporation had a $26.5 billion market cap, putting it in the 88th percentile of all stocks. W. R. Berkley Corporation’s stock is down 0.9% in 2026, up 1.7% in the previous five trading days and down 5.36% in the past year.

Currently, W. R. Berkley Corporation’s price-earnings ratio is 14.0. W. R. Berkley Corporation’s trailing 12-month revenue is $14.9 billion with a 12.9% net profit margin. Year-over-year quarterly sales growth most recently was 1.2%. Analysts expect adjusted earnings to reach $4.874 per share for the current fiscal year. W. R. Berkley Corporation currently has a 2.8% dividend yield.

How We Compare American International Group, Inc. and W. R. Berkley Corporation Stock Grades

Stock evaluation requires access to huge amounts of data and the knowledge and time to sift through it all, make sense of financial ratios, read income statements and analyze recent stock movements. AAII created A+ Investor, a robust data suite that condenses data research in an actionable and customizable way suitable for investors of all knowledge levels, to help investors streamline and work through such data.

AAII’s proprietary stock grades come with A+ Investor. These offer intuitive A‐F grades for each of five key investing factors: value, growth, momentum, earnings estimate revisions and quality. Here, we’ll take a closer look at American International Group, Inc. and W. R. Berkley Corporation’s stock grades to see how they measure up against one another.

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American International Group, Inc. and W. R. Berkley Corporation’s Quality Grades

Company	Ticker	Quality
American International Group, Inc.	AIG	C
W. R. Berkley Corporation	WRB	C

Like the Value Grade, AAII’s A+ Investor Quality Grade comes from the percentile rank of key metrics. Specifically, the Quality Score is the percentile rank of the average of the percentile ranks of return on assets (ROA), return on invested capital (ROIC), gross profit relative to assets, buyback yield, change in total liabilities to assets, accruals, Z double prime bankruptcy risk (Z) score and the F-Score.

The score is variable, meaning it can consider all eight measures or, should any of the eight measures not be valid, the remaining measures that are valid. To be assigned a Quality Score, stocks must have a valid (non-null) measure and corresponding ranking for at least four of the eight quality measures.

The Quality Score is used to assess the underlying “quality” of a particular stock. A higher-quality stock possesses traits associated with upside potential and reduced downside risk. Backtesting of the Quality Grade shows that stocks with higher grades, on average, outperformed stocks with lower grades over the period of 1998 through 2019.

Stocks receive better grades (higher scores) for having higher scores for the quality subcomponents and worse grades (lower scores) for lower scores for the subcomponents.

American International Group, Inc. has a Quality Score of 57, which is Average. W. R. Berkley Corporation has a Quality Score of 51, which is Average.

The Quality Stock Winner: No Clear Winner

Neither American International Group, Inc. or W. R. Berkley Corporation has a high enough Quality Grade to be considered a “winner.” Investors who are considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if American International Group, Inc. or W. R. Berkley Corporation is the better investment when it comes to quality.

American International Group, Inc. and W. R. Berkley Corporation’s Momentum Grades

Company	Ticker	Momentum
American International Group, Inc.	AIG	D
W. R. Berkley Corporation	WRB	D

Momentum grades help to uncover stocks experiencing anomalously high rates of return; research finds that stocks with high relative levels of momentum tend to outperform, whereas those with low levels of momentum tend to continue underperforming. Momentum is based on the price change of a stock over a specified period relative to all other stocks.

Typically, AAII looks at the weighted relative strength over the trailing four quarters. The weighted four-quarter relative strength rank is the relative price change for each of the past four quarters. The most recent quarterly price change is given a weight of 40% and each of the three previous quarters are given a weighting of 20%.

American International Group, Inc. has a Momentum Score of 37, which is Weak. W. R. Berkley Corporation has a Momentum Score of 37, which is Weak.

The Momentum Stock Winner: No Clear Winner

Neither American International Group, Inc. or W. R. Berkley Corporation has a strong enough Momentum Grade to be considered a “winner.” Investors considering these companies should do additional due diligence and research to see if either could be a good addition to their portfolios. It’s important to look at a wide range of financial metrics in order to determine if American International Group, Inc. or W. R. Berkley Corporation is the better investment when it comes to momentum.

American International Group, Inc. and W. R. Berkley Corporation’s Estimate Revisions Grades

Company	Ticker	Earnings Estimate
American International Group, Inc.	AIG	C
W. R. Berkley Corporation	WRB	B

Earnings estimate revisions scores consider the magnitude of a company’s earnings surprise in its last two reported fiscal quarters. Often, positive surprises beget further positive surprises‐or at least continued sales growth (the exact opposite is generally true, too).

Estimate revisions offer an indication of what analysts are thinking about the short-term prospects of a firm. Estimate revisions are based on the statistical significance of a firm’s last two quarterly earnings surprises and the percentage change in its consensus estimate for the current fiscal year over the past month and past three months.

American International Group, Inc. has a Earnings Estimate Score of 57, which is Neutral. W. R. Berkley Corporation has a Earnings Estimate Score of 76, which is Positive.

The Earnings Estimate Revisions Grade Winner: W. R. Berkley Corporation

As you can clearly see from the Earnings Estimate Revisions Grade breakdown above, W. R. Berkley Corporation has a better Earnings Estimate Revisions Grade than American International Group, Inc.. For those who are specifically looking for companies with better short-term prospects when compared to other companies in the same industry, W. R. Berkley Corporation could be a good stock to invest in. However, it’s important to analyze multiple factors based on a wide range of metrics before deciding whether to buy.

Other American International Group, Inc. and W. R. Berkley Corporation Grades

In addition to Momentum, Estimate Revisions and Quality, A+ Investor also provides grades for Value and Growth.

Growth investing builds on the idea that stocks of companies exhibiting strong, consistent and prolonged growth outperform those of slower-growth companies. AAII measures growth through consistency of annual sales growth, five-year sales growth rankings adjusted for extreme levels, and consistency of positive annual cash from operations.

Successful stock investing involves buying low and selling high, so stock valuation is an important consideration for stock selection. Buying stocks that are going to go up typically means buying stocks that are undervalued in the first place, although momentum investors may argue that point.

These 2 key factors, when combined with the above, provide a holistic view into a particular stock. Further, by joining A+ Investor you can see whether American International Group, Inc. and W. R. Berkley Corporation pass any of our 60+ stock screens that have outperformed the market since their creation.

So, Which Is the Better Investment, American International Group, Inc. or W. R. Berkley Corporation Stock?

Overall, American International Group, Inc. stock has a Momentum Score of 37, Estimate Revisions Score of 57 and Quality Score of 57.

W. R. Berkley Corporation stock has a Momentum Score of 37, Estimate Revisions Score of 76 and Quality Score of 51.

Comparing American International Group, Inc. and W. R. Berkley Corporation’s grades, scores and metrics can act as a solid basis to determine whether they may be a good investment or not. You’ll also want to look at your portfolio’s asset allocation as well as your risk tolerance and financial goals to see if either of these stocks would make a good fit for you. AAII can help you figure out which investments align with your individual needs and preferences.

Investors are encouraged to do their own due diligence and research. In this way, individuals can effectively become managers of their own assets‐without having to rely on others for financial independence. You can count on AAII for timeless articles on financial planning and stock-picking, unbiased research and actionable analysis.

A+ Investor adds to our qualitative teaching with a powerful data suite to help you whittle down investment choices to find stocks, exchange-traded funds (ETFs) or mutual funds that meet your needs.

AAII Disclaimer

We make no representations or warranties that any investor will, or is likely to, achieve profits similar to those shown, because past, hypothetical or simulated performance is not necessarily indicative of future results. Before making an investment decision, you should consider your circumstances and whether the information on our content is applicable to your situation. This information was prepared in good faith, and we accept no liability for any errors or omissions. The full disclaimer can be read here.