Omnicom Group Inc. (OMC) ownership: Top institutional holder: VANGUARD GROUP INC ($3.14B). Insider activity: Net Seller (7 buys, 13 sells). 6 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| VANGUARD GROUP INC | 38934118.00 | $3.14B | 2025-12-31 |
| BlackRock, Inc. | 29498159.00 | $2.22B | 2026-03-31 |
| STATE STREET CORP | 27760218.00 | $2.11B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 20295276.00 | $1.53B | 2026-03-31 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 14840407.00 | $1.12B | 2026-03-31 |
| Bank of New York Mellon Corp | 12098191.00 | $911.11M | 2026-03-31 |
| JPMORGAN CHASE & CO | 12031678.00 | $906.23M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 9313917.00 | $699.75M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-22 | |
| Buy | null | 2026-05-22 | |
| Sell | null | 2026-05-22 | |
| Buy | null | 2026-05-22 | |
| Sell | null | 2026-05-22 | |
| Buy | null | 2026-05-22 | |
| Buy | null | 2026-05-15 | |
| Buy | null | 2026-05-15 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.