CMCSA (Comcast Corp)
Insider Trading Activity
Every open-market purchase and sale reported by CMCSA officers, directors and 10%+ beneficial owners on SEC Form 4, which must be filed within two business days of the transaction. Sales often reflect scheduled 10b5-1 plans or tax withholding rather than a directional view, so read counts alongside the size and the filer.
Market data may be delayed, incomplete, or inaccurate. Not a recommendation to buy, sell, or hold any security. Verify quotes with your broker before trading. See Terms §17.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-09-03 | Michael J Cavanagh | Co-CEO | I | — | — |
| 2026-09-03 | BRIAN L ROBERTS | Chairman of Board & Co-CEO | G | — | — |
| 2026-08-18 | EDWARD D BREEN | Director | G | — | — |
| 2026-08-06 | BRIAN L ROBERTS | Chairman of Board & Co-CEO | G | — | — |
| 2026-08-06 | BRIAN L ROBERTS | Chairman of Board & Co-CEO | G | — | — |
| 2026-07-02 | Gordon Smith | Director | A | — | — |
| 2026-07-02 | Louise F. Brady | Director | A | — | — |
| 2026-07-02 | EDWARD D BREEN | Director | A | — | — |
| 2026-07-02 | Jeffrey A Honickman | Director | A | — | — |
| 2026-07-02 | Thomas J Baltimore Jr | Director | A | — | — |
| 2026-05-20 | BRIAN L ROBERTS | Chairman of Board & Co-CEO | G | — | — |
| 2026-05-12 | EDWARD D BREEN | Director | G | — | — |
| 2026-04-03 | Daniel C. Murdock | EVP & Chief Accounting Officer | MIXED | — | — |
| 2026-04-02 | Thomas J Baltimore Jr | Director | A | — | — |
| 2026-04-02 | Louise F. Brady | Director | A | — | — |
| 2026-04-02 | EDWARD D BREEN | Director | A | — | — |
| 2026-04-02 | Jeffrey A Honickman | Director | A | — | — |
| 2026-04-02 | Gordon Smith | Director | A | — | — |
| 2026-03-18 | EDWARD D BREEN | Director | G | — | — |
| 2026-03-18 | Jennifer Khoury | Chief Communications Officer | MIXED | — | — |
| 2026-03-06 | Jason Armstrong | CFO | MIXED | — | — |
| 2026-03-03 | Thomas J. Reid | Chief Legal Officer, Secretary | MIXED | — | — |
| 2026-03-03 | Daniel C. Murdock | EVP & Chief Accounting Officer | MIXED | — | — |
| 2026-03-03 | Jason Armstrong | CFO | MIXED | — | — |
| 2026-03-03 | Jennifer Khoury | Chief Communications Officer | MIXED | — | — |
| 2026-03-03 | Michael J Cavanagh | Co-CEO | MIXED | — | — |
| 2026-03-03 | BRIAN L ROBERTS | Chairman of Board & Co-CEO | MIXED | — | — |
| 2026-02-26 | BRIAN L ROBERTS | Chairman of Board & Co-CEO | A | — | — |
| 2026-02-26 | Michael J Cavanagh | Co-CEO | A | — | — |
| 2026-02-26 | Jason Armstrong | CFO | A | — | — |
| 2026-02-26 | Thomas J. Reid | Chief Legal Officer, Secretary | A | — | — |
| 2026-02-26 | Jennifer Khoury | Chief Communications Officer | A | — | — |
| 2026-02-13 | Michael J Cavanagh | Co-CEO | MIXED | — | — |
| 2026-02-13 | BRIAN L ROBERTS | Chairman of Board & Co-CEO | MIXED | — | — |
| 2026-02-05 | Gordon Smith | Director | A | — | — |
| 2026-02-04 | ASUKA NAKAHARA | Director | Sell | — | — |
| 2026-02-03 | Michael J Cavanagh | Co-CEO | I | — | — |
| 2026-02-03 | Daniel C. Murdock | EVP & Chief Accounting Officer | A | — | — |
| 2026-01-22 | Thomas J. Reid | Chief Legal Officer, Secretary | MIXED | — | — |
| 2026-01-22 | Madeline S. Bell | Director | M | — | — |
| 2026-01-22 | Jason Armstrong | CFO | MIXED | — | — |
| 2026-01-22 | Daniel C. Murdock | EVP & Chief Accounting Officer | MIXED | — | — |
| 2026-01-22 | Thomas J Baltimore Jr | Director | A | — | — |
| 2026-01-22 | Louise F. Brady | Director | A | — | — |
| 2026-01-22 | EDWARD D BREEN | Director | A | — | — |
| 2026-01-22 | Jeffrey A Honickman | Director | A | — | — |
| 2026-01-06 | Michael J Cavanagh | Co-CEO | I | — | — |
| 2025-11-21 | KENNETH J BACON | Director | A | — | — |
| 2025-11-21 | Thomas J Baltimore Jr | Director | A | — | — |
| 2025-11-21 | Madeline S. Bell | Director | A | — | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| — | Chairman of Board & Co-CEO | 21,164,247 | — |
| — | Director | 2,519,350 | — |
| — | Sr. EVP | 1,155,216 | — |
| — | Sr. EVP | 1,058,708 | — |
| — | CEO - Comcast Cable | 992,517 | — |
| — | CEO - NBCUniversal | 407,812 | — |
| — | Director | 391,351 | — |
| — | Director | 291,933 | — |
| — | Co-CEO | 277,173 | — |
| — | Vice Chairman and CFO | 258,723 | — |
| — | Director | 235,195 | — |
| — | Chief Legal Officer, Secretary | 223,474 | — |
| — | CFO | 172,399 | — |
| — | Sr. EVP | 129,669 | — |
| — | Director | 122,471 | — |
| — | CEO - Sky | 94,410 | — |
| — | EVP, GC and Secretary | 91,686 | — |
| — | EVP & Chief Accounting Officer | 77,688 | — |
| — | Director | 68,596 | — |
| — | Director | 65,630 | — |
| — | EVP & Chief Accounting Officer | 62,362 | — |
| — | Director | 61,975 | — |
| — | Chief Communications Officer | 60,538 | — |
| — | Chief Administrative Officer | 59,078 | — |
| — | Director | 57,957 | — |
Form 4 reports a change in beneficial ownership by an officer, director or 10%+ holder, and must be filed within two business days of the transaction — so this is close to real time, unlike the 45-day-lagged 13F institutional data.
Transaction codes matter more than the raw buy/sell count. Code P is an open-market purchase — an insider choosing to buy with their own money, which is the signal most research treats as informative. Code S is a sale, but sales are frequently pre-scheduled under a 10b5-1 plan or cover tax withholding on vesting equity, so a run of sales often says nothing directional. Codes A and M are grants and option exercises rather than open-market decisions.
Full filing history and per-insider positions are on the CMCSA quote page; the site-wide leaderboard is on the insider transactions hub.