Comcast Corporation (CMCSA) ownership: Top institutional holder: Silver Rock Financial LP ($17.56B). Insider activity: Net Seller (3 buys, 17 sells). 10 recent congressional STOCK Act disclosures. SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| Silver Rock Financial LP | 611500.00 | $17.56B | 2026-03-31 |
| VANGUARD GROUP INC | 369311219.00 | $11.04B | 2025-12-31 |
| BlackRock, Inc. | 314985765.00 | $9.04B | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 233154772.00 | $6.69B | 2026-03-31 |
| STATE STREET CORP | 182735113.00 | $5.25B | 2026-03-31 |
| Capital World Investors | 182141779.00 | $5.23B | 2026-03-31 |
| NORGES BANK | 110002313.00 | $4.06B | 2025-03-31 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 121558654.00 | $3.49B | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Sell | null | 2026-05-19 | |
| Sell | null | 2026-05-11 | |
| Sell | null | 2026-04-03 | |
| Buy | null | 2026-04-03 | |
| Sell | null | 2026-04-03 | |
| Sell | null | 2026-03-31 | |
| Sell | null | 2026-03-31 | |
| Sell | null | 2026-03-31 |
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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.