With a market capitalization (market cap) of $20.34B — a measure of how much the company is worth — Omnicom Group Inc. ranks #584 among the 2,510 companies tracked, and 23rd in Communication Services as of October 2, 2026. Shares trade at $74.15, down 0.74% on the day.
of 2,510 tracked
Market-cap change uses historical capitalization records. Share-price returns are a different series — they can diverge when the share count changes. Those returns are not a CAGR until you pick a start value, an ending value, and years. CAGR calculator. Market cap vs. stock price.
Year-end values and the chart both come from historical market-cap records, not from applying today's share count to past prices. Latest historical observation October 2, 2026. Ranking headline cap is the snapshot figure as of October 2, 2026.
| Year | As of | Market cap | Annual change | Year-end close |
|---|---|---|---|---|
| 2026 | Oct 2, 2026 | $15.19B | -8.17% | $74.15 |
| 2025 | Dec 31, 2025 | $16.55B | -2.24% | $80.75 |
| 2024 | Dec 31, 2024 | $16.92B | -1.20% | $86.04 |
| 2023 | Dec 29, 2023 | $17.13B | +2.99% | $86.51 |
| 2022 |
Ranking figure $20.34B as of October 2, 2026.
Omnicom 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 $74.15 as of October 2, 2026. Charts and the year-end table use a separate historical market-cap series, last observed at $15.19B on October 2, 2026. See how the ranking works.
The ranking snapshot ($20.34B as of October 2, 2026) is FMP company-screener market cap. The historical observation ($15.19B on October 2, 2026) is FMP historical-market-capitalization for the same ticker. Showing the same calendar date does not make them the same observation: ranking as-of is a snapshot timestamp displayed as a date, and the historical series is a date-stamped point. The live quote market cap agrees with the ranking snapshot. This page does not replace one series with the other.
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 201,852,000 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 $14.97B. The ranking uses the provider's reported market cap instead, which reflects a current share count rather than that annual average.
Book equity: assets minus liabilities on the latest annual report.
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FY 2025 net worth
Largest U.S.-listed names in the same FMP sector — not a hand-picked competitor set.
| Rank | Company | Market cap | 1D |
|---|---|---|---|
| #3 | Alphabet Inc. GOOG | $4.13T | +1.62% |
| #8 | Meta Platforms, Inc. META | $1.85T | +0.30% |
| #46 |
Omnicom Group Inc., through its network of subsidiaries, stands as a premier global provider of comprehensive advertising, marketing, and corporate communications solutions. The company's core expertise extends across pivotal areas such as traditional and digital advertising, customer relationship management (CRM), public relations, and specialized healthcare communications. Its extensive service portfolio delivers a wide array of strategic and creative solutions.
Summary from the company profile (Financial Modeling Prep). Principal financial figures above are for FY 2025.
Visit websiteAs of October 2, 2026, Omnicom Group Inc. (OMC) is worth $20.34B — that is its market capitalization, the total value of its outstanding shares on MarketCapLens.
A company’s net worth is its shareholders’ equity: assets minus liabilities on the balance sheet. That is book equity, not market cap. For FY 2025, Omnicom Group Inc.’s book equity is about $13.06B. Market cap is the market value of the outstanding shares. As of October 2, 2026, its market cap is $20.34B. Book equity is an accounting remainder; market cap is a trading value. Neither is a person’s net worth.
Omnicom Group Inc. ranks #584 among the 2,510 companies tracked on MarketCapLens. In Communication Services it ranks #23 of 99.
Fundamentals are annual. Figures labeled with their fiscal year. Live ratios use the current price against those annual earnings.
| Dec 30, 2022 |
| $16.63B |
| +8.41% |
| $81.57 |
| 2021 | Dec 31, 2021 | $15.34B | — | $73.27 |
|---|
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.
Not in this snapshot
FY 2025
| $279.23B |
| -1.16% |
| #79 | Verizon Communications Inc. VZ | $191.74B | -0.13% |
| #84 | The Walt Disney Company DIS | $177.45B | +0.85% |
| #85 | T-Mobile US, Inc. TMUS | $175.53B | +1.18% |
Companies immediately above and below in the overall ranking. They may be in a different sector.
| Rank | Company | Market cap | 1D |
|---|---|---|---|
| #581 | Viatris Inc. VTRS | $20.5B | +0.80% |
| #582 | Reliance Steel & Aluminum Co. RS | $20.44B | +1.85% |
| #583 | Packaging Corporation of America PKG | $20.36B | -0.51% |
| #585 | STERIS plc STE | $20.32B | -0.38% |
| #586 | TransCanada PipeLines Limited 6 TCPA | $20.24B | -0.99% |
| #587 | SoFi Technologies, Inc. SOFI | $20.23B | -0.44% |
Omnicom Group Inc.’s ranking market cap of $20.34B comes from the same snapshot as the rest of this site, as of October 2, 2026. It is not share price multiplied by the FY 2025 weighted-average share count of 201,852,000. The ranking snapshot ($20.34B as of October 2, 2026) is FMP company-screener market cap. The historical observation ($15.19B on October 2, 2026) is FMP historical-market-capitalization for the same ticker. Showing the same calendar date does not make them the same observation: ranking as-of is a snapshot timestamp displayed as a date, and the historical series is a date-stamped point. The live quote market cap agrees with the ranking snapshot. This page does not replace one series with the other.
Over the past year, Omnicom Group Inc.’s market cap is down 3.51%, using historical market-cap records rather than today’s share count applied to past prices.
Omnicom Group Inc. (OMC) shares trade at $74.15, down 0.74% on the day, as of October 2, 2026.
Live P/E is share price divided by annual earnings per share. It is blank when earnings are missing, zero, or negative — not a 0× multiple.