Affiliated Managers Group (AMG) opened 2026 with Q1 results that cap a strong recent run in the numbers, with Q4 2025 revenue at US$556.6 million, basic EPS of US$12.55 and trailing twelve month EPS of US$25.14 on net income of US$716.6 million. Over the past six quarters, revenue has moved from US$516.4 million in Q3 2024 to US$556.6 million in Q4 2025, while quarterly EPS has ranged from US$4.11 in Q3 2024 to US$12.55 in Q4 2025. This sets up a picture of margins that look solid but are partly shaped by a sizeable one off gain.

See our full analysis for Affiliated Managers Group.

With the latest numbers on the table, the next step is to see how this earnings profile lines up with the big narratives around AMG's growth potential and risk profile, and where the data pushes back against them.

Margins Lifted by One Off Gain

• Trailing net margin sits at 34.5% versus 25.1% a year earlier, with trailing net income of US$716.6 million on US$2,074.4 million of revenue and a US$417.0 million one off gain included in that profit figure.
• Bulls point out that higher fee alternative assets and affiliates with stronger profitability could support margins. However, the margin step up is currently heavily tied to that one off gain, so investors who lean bullish may want to separate the US$417.0 million item from the underlying 34.5% margin when judging how durable this profitability really is.

AUM Growth and Flows Behind the Story

• Across 2025, AUM moved from US$707.9b at the start of Q1 to US$813.3b at the end of Q4, with trailing year net inflows of US$51.7b supported by quarterly flows of US$1.3b, US$20.5b and US$8.9b in Q1, Q2 and Q3 respectively.
• Consensus narrative highlights strong interest in alternatives and liquid strategies as a key driver for those inflows. The numbers support that focus on growth in fee earning assets, while also leaving room for bears to argue that if industry wide demand for higher cost active strategies softens, flows like the US$20.5b in Q2 2025 may be harder to repeat on a consistent basis.

Bulls argue AMG's growing alternative AUM and record inflows could justify a richer multiple if that momentum continues and offsets pressure in traditional active strategies, and the current combination of US$51.7b of net inflows over the past year and a trailing P/E of 10.8x versus analyst targets around US$375.14 keeps that bullish debate very much alive for investors weighing how much to pay for that growth optionality.🐂 Affiliated Managers Group Bull Case

Low P/E, Yet Forecast Earnings Decline

• The shares trade on a P/E of 10.8x at a price of US$291.07, which is below the US Capital Markets industry average of 42.4x, below a peer average of 13.1x and modestly below the DCF fair value of US$325.73, while analysts at the same time expect earnings to decline about 5% per year over the next three years.
• Bears argue that the low multiple and discount to DCF fair value largely reflect this projected earnings decline together with the impact of the US$417.0 million one off gain on the 40.1% trailing EPS growth. From this perspective, without that item and with forecast lower earnings, the current 10.8x P/E and gap to the US$375.14 analyst target may not automatically signal an obvious bargain.

Skeptics warn that if earnings follow the roughly 5% annual decline currently projected, investors could see the valuation stay compressed even with a P/E well below sector levels and a price under DCF fair value. This is why bears keep pointing back to the quality and repeatability of the recent profit run rather than the headline discount alone.🐻 Affiliated Managers Group Bear Case

Next Steps

To see how these results tie into long-term growth, risks, and valuation, check out the full range of community narratives for Affiliated Managers Group on Simply Wall St. Add the company to your watchlist or portfolio so you'll be alerted when the story evolves.

With bulls and bears both finding support in the recent figures, it may be helpful to review the details and form your own view using our breakdown of 4 key rewards and 4 important warning signs.

See What Else Is Out There

AMG's earnings picture leans heavily on a US$417.0 million one off gain and faces roughly 5% annual earnings decline expectations, which keeps valuation pressure in focus.

If you are concerned about relying on non recurring gains and cautious earnings projections, it makes sense to compare AMG with companies in the 67 resilient stocks with low risk scores.

This article by Simply Wall St is general in nature. We provide commentary based on historical data and analyst forecasts only using an unbiased methodology and our articles are not intended to be financial advice. It does not constitute a recommendation to buy or sell any stock, and does not take account of your objectives, or your financial situation. We aim to bring you long-term focused analysis driven by fundamental data. Note that our analysis may not factor in the latest price-sensitive company announcements or qualitative material. Simply Wall St has no position in any stocks mentioned.