Affiliated Managers Group (AMG) vs SEI Investments (SEIC)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 9, 2026.
Summary
Affiliated Managers Group (AMG) has outperformed SEI Investments (SEIC) over the past year, gaining 59.8% versus a gain of 22.0%. Over five years, AMG leads with a +141.8% price change compared with +67.6% for SEIC. SEI Investments is the larger company by market cap ($12.39 billion vs $10.01 billion), about 1.2 times the size.
On valuation, Affiliated Managers Group trades at a lower forward P/E (9.0x vs 14.8x for SEI Investments). SEI Investments offers the higher dividend yield (1.01% vs 0.01%). Affiliated Managers Group converts more of its revenue into profit, with a net margin of 34.5% versus 31.1%.
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | AMG | SEIC |
|---|---|---|
| Share price | $386.99 | $103.25 |
| Market cap | $10.01B | $12.39B |
| 1-day change | +2.63% | +1.16% |
| YTD return | +34.24% | +25.88% |
| 1-year return | +59.83% | +22.04% |
| 5-year return | +141.81% | +67.61% |
| P/E ratio (TTM) | 13.56 | 18.21 |
| Forward P/E | 9.04 | 14.81 |
| EPS (TTM) | $28.54 | $5.67 |
| Dividend yield | 0.01% | 1.01% |
| Annual dividend | $0.04 | $1.04 |
| Revenue (latest FY) | $2.07B | $2.30B |
| Revenue growth (YoY) | +1.64% | +8.10% |
| Net income (latest FY) | $716.60M | $715.30M |
| Gross margin | — | 35.18% |
| Operating margin | — | 27.31% |
| Net margin | 34.54% | 31.14% |
| 52-week high | $393.42 | $112.15 |
| 52-week low | $230.26 | $75.08 |
| Distance from 52-week high | -1.63% | -7.94% |
| Analyst consensus | strong_buy | buy |
| Avg. price target upside | +13.81% | +13.44% |
| Average volume | 277.13K | 764.29K |
| Shares outstanding | 25.86M | 120.02M |
| Employees | 5,600 | 4,997 |
| Sector | Finance | Finance |
| Industry | Investment Managers | Investment Bankers/Brokers/Service |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- AMG has outperformed SEIC by 37.8 percentage points over the past year.
- SEI Investments trades at a higher earnings multiple (18.2x vs 13.6x trailing P/E).
- SEI Investments grew revenue faster in its latest fiscal year (+8.10% vs +1.64%).
About Affiliated Managers Group
AMG stock →Affiliated Managers Group, Inc., through its affiliates, operates as an investment management company providing investment management services to mutual funds, institutional clients,retails and high net worth individuals in the United States. It provides advisory or sub-advisory services to mutual funds.
Finance · Investment Managers · 5,600 employees
About SEI Investments
SEIC stock →SEI Investments Company is a publicly owned asset management holding company. Through its subsidiaries, the firm provides wealth management, retirement and investment solutions, asset management, asset administration, investment processing outsourcing solutions, financial services, and investment advisory services to its clients.
Finance · Investment Bankers/Brokers/Service · 4,997 employees
AMG vs SEIC FAQ
Which is bigger, Affiliated Managers Group or SEI Investments?
SEI Investments (SEIC) is larger, with a market capitalization of $12.39B compared with $10.01B for Affiliated Managers Group (AMG).
Which stock has performed better over the past year, AMG or SEIC?
AMG returned +59.83% over the past 12 months, compared with +22.04% for SEIC (price return, excluding dividends). Past performance does not predict future results.
Which has the lower P/E ratio, AMG or SEIC?
AMG has the lower trailing P/E at 13.6, versus 18.2 for SEIC. A lower P/E is not by itself a sign of a better investment; it can reflect slower expected growth or higher risk.
Which pays a higher dividend, Affiliated Managers Group or SEI Investments?
SEI Investments has the higher yield at 1.01%, compared with 0.01% for Affiliated Managers Group.
Are Affiliated Managers Group and SEI Investments in the same industry?
Both are in the Finance sector, but in different industries: Investment Managers for Affiliated Managers Group and Investment Bankers/Brokers/Service for SEI Investments.