With a market capitalization (market cap) of $9.34B — a measure of how much the company is worth — Affiliated Managers Group, Inc. ranks #977 among the 2,549 companies tracked, and 164th in Financial Services as of September 16, 2026. Shares trade at $16.16, up 1.06% on the day.
of 2,549 tracked
Market-cap change uses historical capitalization records. Share-price returns are a different series — they can diverge when the share count changes. Market cap vs. stock price.
Over the past year, market cap and share price moved by different amounts. Share count can change independently of price. What changes market cap.
Year-end values and the chart both come from historical market-cap records, not from applying today's share count to past prices.
| Year | As of | Market cap | Annual change | Year-end close |
|---|---|---|---|---|
| 2026 | Sep 16, 2026 | $9.19B | +19.01% | $16.16 |
| 2025 | Dec 31, 2025 | $7.73B | +43.08% | $16.96 |
| 2024 | Dec 31, 2024 | $5.4B | +5.82% | $18.18 |
| 2023 | Dec 29, 2023 | $5.1B | -14.11% | $18.95 |
| 2022 | Dec 30, 2022 |
Ranking figure $9.34B as of September 16, 2026.
Affiliated Managers Group, Inc.'s ranking market cap is the provider-reported capitalization on the same snapshot as the rest of this site, with a share price of $16.16 as of September 16, 2026. See how the ranking works.
Live shares outstanding are not on the quote used for price, so this page does not invent a current share count. Shares outstanding vs. float.
The latest annual report (FY 2025) used a weighted-average 28,500,000 shares. That figure is an average for the year, not the live count in the market-cap formula.
Multiplying the latest price by those FY 2025 weighted-average shares would give about $460.56M. The ranking uses the provider's reported market cap instead, which reflects a current share count rather than that annual average.
Multiple share classes of this company are combined on the ranking so it is counted once. Dual-class shares and market cap.
Ranking snapshot
current price ÷ annual EPS
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Largest U.S.-listed names in the same FMP sector — not a hand-picked competitor set.
| Rank | Company | Market cap | 1D |
|---|---|---|---|
| #12 | Berkshire Hathaway Inc. BRK-B | $1.12T | +0.76% |
| #15 | JPMorgan Chase & Co. JPM | $934.93B | -1.01% |
| #18 |
Affiliated Managers Group, Inc. specializes in providing investment management solutions. The company offers a comprehensive suite of strategies that encompass diverse asset classes focused on generating returns, in addition to various investment product types. William J.
Summary from the company profile (Financial Modeling Prep). Principal financial figures above are for FY 2025.
Visit websiteAs of September 16, 2026, Affiliated Managers Group, Inc. (MGRB) is worth $9.34B — that is its market capitalization, the total value of its outstanding shares on MarketCapLens.
Affiliated Managers Group, Inc. ranks #977 among the 2,549 companies tracked on MarketCapLens. In Financial Services it ranks #164 of 419.
Affiliated Managers Group, Inc.’s ranking market cap of $9.34B comes from the same snapshot as the rest of this site, as of September 16, 2026. It is not share price multiplied by the FY 2025 weighted-average share count of 28,500,000.
Fundamentals are annual. Figures labeled with their fiscal year. Live ratios use the current price against those annual earnings.
| $5.94B |
| -9.03% |
| $16.82 |
| 2021 | Dec 31, 2021 | $6.53B | — | $26.32 |
|---|
Last observation of each calendar year from historical market-cap records. The current year is through the latest date, not a completed year-end. Share-price close is the matching session for context — we do not rebuild cap from today's share count.
FY 2025
| $692.54B |
| -1.25% |
| #23 | Mastercard Incorporated MA | $497.94B | -0.96% |
| #28 | Bank of America Corporation BAC | $410.89B | -2.72% |
| #36 | HSBC Holdings plc HSBC | $346.56B | -1.35% |
Companies immediately above and below in the overall ranking. They may be in a different sector.
| Rank | Company | Market cap | 1D |
|---|---|---|---|
| #974 | Tetra Tech, Inc. TTEK | $9.46B | -0.68% |
| #975 | Booz Allen Hamilton Holding Corporation BAH | $9.43B | -2.06% |
| #976 | KT Corporation KT | $9.38B | -1.97% |
| #978 | Alexandria Real Estate Equities, Inc. ARE | $9.33B | +1.11% |
| #979 | Solstice Advanced Materials Inc. SOLS | $9.29B | +2.31% |
| #980 | Flowserve Corporation FLS | $9.27B | +1.80% |
Over the past year, Affiliated Managers Group, Inc.’s market cap is up 36.46%, using historical market-cap records rather than today’s share count applied to past prices.
Affiliated Managers Group, Inc. (MGRB) shares trade at $16.16, up 1.06% on the day, as of September 16, 2026.
Affiliated Managers Group, Inc. trades at a live price-to-earnings (P/E) ratio of 0.6, using the latest share price divided by the latest annual earnings per share. That is not the same as a fiscal-year reported P/E.