Arthur J. Gallagher & Co. vs Brown & Brown
Prices at close . Model readings .
Arthur J. Gallagher & Co.
$260.42+0.54%- Market value
- $66.75B
- P/E
- 40.5
- 1 year
- −5.8%
Brown & Brown
$65.88−2.47%- Market value
- $21.85B
- P/E
- 18.9
- 1 year
- −24.2%
Price change, with the S&P 500 as a benchmark
Percent change in each close since the start of the chosen range, for both companies and the S&P 500 (SPY). Daily closes over the last year, weekly before that and monthly before five years.
How the two compare
On the latest closes (28 Oct 2026), Arthur J. Gallagher & Co. is the larger company by market value ($66.75B against $21.85B). Over the past year Arthur J. Gallagher & Co. returned −5.8% and Brown & Brown −24.2%, while the S&P 500 returned +12.7%. The latest filed P/E is 40.5 for Arthur J. Gallagher & Co. and 18.9 for Brown & Brown, and the operating margin -6.6% against 24.2%. Over the next 21 sessions the model expects −0.6% for Arthur J. Gallagher & Co., with a 20% chance of a rise, and −0.37% for Brown & Brown, with a 50% chance. Arthur J. Gallagher & Co.'s long-run fair value is $237.07, a gap of −9% to its price; the long-run model view is neutral. Brown & Brown's long-run fair value is $65.85, a gap of −0.1% to its price; the long-run model view is neutral.
What the model expects
Expected returns and the chance of a rise from our forecasting models, and the long-run fair value against the price. Readings, not advice.
How the prices moved
Price change over each period, with the S&P 500 (SPY) for comparison.
What the market pays
Size and the multiples from the latest filed quarter. A P/E on losses reads n/m.
How much of revenue becomes profit
Margins and returns on capital from the latest filing; revenue, net income and earnings per share over the trailing twelve months.
How fast the business grew
Change against the same quarter a year earlier.
Balance sheet and quality scores
Leverage, liquidity and two published scores: Altman Z (below 1.8 the distress zone, above 3 the safe zone) and Piotroski F (0 to 9).
How the shares trade
Volatility, sensitivity to the market, the deepest fall, short interest and how closely the two move together.
Arthur J. Gallagher & Co. or Brown & Brown: common questions
Which is larger by market value, Arthur J. Gallagher & Co. or Brown & Brown?
Arthur J. Gallagher & Co., at $66.75B against $21.85B for Brown & Brown, on the latest closes (28 Oct 2026).
Which has the higher P/E ratio, Arthur J. Gallagher & Co. or Brown & Brown?
Arthur J. Gallagher & Co. has the higher latest filed P/E, 40.5; Brown & Brown's is 18.9. Filings: quarter to 30 Jun 2026 and 30 Sep 2026.
How did Arthur J. Gallagher & Co. and Brown & Brown move over the past year against the S&P 500?
Over the past year Arthur J. Gallagher & Co. returned −5.8% and Brown & Brown −24.2%, while the S&P 500 returned +12.7%. Prices at close 28 Oct 2026.
What does the model expect for Arthur J. Gallagher & Co. and Brown & Brown over the next month?
−0.6% for Arthur J. Gallagher & Co. with a 20% chance of a rise, and −0.37% for Brown & Brown with a 50% chance, over the next 21 sessions. Model readings 28 Oct 2026. These are model readings, not advice.
How do the operating margins of Arthur J. Gallagher & Co. and Brown & Brown compare?
The operating margin is -6.6% for Arthur J. Gallagher & Co. and 24.2% for Brown & Brown. Filings: quarter to 30 Jun 2026 and 30 Sep 2026.
Do Arthur J. Gallagher & Co. and Brown & Brown shares move together?
Over the past year the correlation of their daily returns was 0.83 (closely together); 1 means they always move together, 0 unrelated, −1 opposite. Prices at close 28 Oct 2026.
Model readings are research estimates, not investment advice. Prices: daily closes. Fundamentals: the latest SEC filings. Short interest: FINRA, settlement 30 Sep 2026. A dash means the figure is not in our data; it is never shown as zero. The model view follows a published rule: next month by the sign of the expected return, the long run positive at a fair value 10% or more above the price and negative at 10% or more below it.