Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in OMC held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 29.5M | $2.22B | +1.1% | 9.505% | 0.04% |
| 2 | STATE STREET CORP | 27.8M | $2.11B | +17.3% | 8.945% | 0.07% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 20.3M | $1.53B | — | 6.540% | 0.04% |
| 4 | VANGUARD PORTFOLIO MANAGEMENT LLC | 14.8M | $1.12B | — | 4.782% | 0.06% |
| 5 | Bank of New York Mellon Corp | 12.1M | $911.1M | +7.2% | 3.898% | 0.17% |
| 6 | GEODE CAPITAL MANAGEMENT, LLC | 9.3M | $699.8M | +8.6% | 3.001% | 0.04% |
| 7 | MASSACHUSETTS FINANCIAL SERVICES CO /MA/ | 8.7M | $664.9M | +11.0% | 2.815% | 0.22% |
| 8 | First Eagle Investment Management, LLC | 7.3M | $550.0M | +15.0% | 2.353% | 0.73% |
| 9 | MORGAN STANLEY | 6.9M | $521.6M | +45.2% | 2.232% | 0.03% |
| 10 | Capital Research Global Investors | 6.7M | $504.2M | +42.7% | 2.157% | 0.08% |
| 11 | CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 6.4M | $480.2M | +0.4% | 2.049% | 0.07% |
| 12 | FMR LLC | 6.0M | $452.5M | +37.3% | 1.936% | 0.02% |
| 13 | HOTCHKIS & WILEY CAPITAL MANAGEMENT LLC | 5.4M | $404.9M | -2.6% | 1.732% | 1.25% |
| 14 | Baird Financial Group, Inc. | 4.7M | $354.7M | +8.2% | 1.518% | 0.55% |
| 15 | AQR CAPITAL MANAGEMENT LLC | 4.4M | $333.2M | +19.4% | 1.426% | 0.15% |
| 16 | DIMENSIONAL FUND ADVISORS LP | 4.0M | $299.6M | -17.5% | 1.282% | 0.06% |
| 17 | Invesco Ltd. | 4.0M | $299.6M | +4.6% | 1.282% | 0.05% |
| 18 | GOLDMAN SACHS GROUP INC | 3.6M | $270.4M | -41.2% | 1.157% | 0.03% |
| 19 | NORTHERN TRUST CORP | 3.4M | $255.9M | -8.4% | 1.095% | 0.03% |
| 20 | VICTORY CAPITAL MANAGEMENT INC | 3.1M | $232.0M | +58.1% | 0.993% | 0.15% |
| 21 | UBS Group AG | 2.6M | $198.4M | +141.6% | 0.849% | 0.03% |
| 22 | WELLINGTON MANAGEMENT GROUP LLP | 2.5M | $189.3M | -51.7% | 0.810% | 0.04% |
| 23 | COOKE & BIELER LP | 2.3M | $172.0M | -10.0% | 0.736% | 1.94% |
| 24 | BANK OF AMERICA CORP /DE/ | 2.2M | $165.2M | +10.4% | 0.707% | 0.01% |
| 25 | UBS ASSET MANAGEMENT AMERICAS INC | 2.0M | $153.4M | +11.7% | 0.656% | 0.03% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in OMC — a direct measure of their conviction.
Filings activity in OMC during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,099 | 2.6% | 89.89% | 11.29 pp | $21.39B | 11% |
| Q4 2025 | 1,128 | +23% | 101.18% | +28.94 pp | $24.08B | +40% |
| Q3 2025 | 919 | 0.6% | 72.24% | +9.12 pp | $17.19B | +14% |
| Q2 2025 | 925 | 3.1% | 63.12% | 2.50 pp | $15.02B | 3.8% |
| Q1 2025 | 955 | +3.2% | 65.62% | 1.30 pp | $15.62B | 1.9% |
| Q4 2024 | 925 | +1.2% | 66.92% | 9.45 pp | $15.92B | 12% |
| Q3 2024 | 914 | +2.2% | 76.37% | +2.34 pp | $18.17B | +3.2% |
| Q2 2024 | 894 | — | 74.03% | — | $17.62B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying OMC stock.
Based on Q1 2026 13F filings, institutional ownership of Omnicom Group Inc. stands at 89.9%, held across 1,099 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of OMC, with approximately 29,498,159 shares worth $2.22B as of Q1 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of OMC.
Our composite Smart Money Score for OMC is 18 out of 100 (Heavy Distribution). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
142 institutions opened new positions in OMC during Q1 2026, while 171 fully exited. 303 added to existing positions and 650 trimmed.
OMC institutional ownership fell by 11.29 percentage points quarter-over-quarter, with a net change of -29 holders.
The top 10 institutions account for 50.6% of all reported 13F value in OMC, and the top 25 account for 70.5%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Omnicom Group Inc. (OMC) Institutional Ownership