CMCSA · Insider Trading
Comcast Corp
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.
| Filed | Insider | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-10-02 | Gordon Smith | Director | A | +1,552 | — |
| 2026-10-02 | Edward D Breen | Director | A | +920 | — |
| 2026-10-02 | Jeffrey A Honickman | Director | A | +2,011 | — |
| 2026-10-02 | Louise F. Brady | Director | A | +1,552 | — |
| 2026-10-02 | Thomas J Baltimore Jr | Director | A | +1,552 | — |
| 2026-09-03 | Michael J Cavanagh | Co-CEO | I | −958,411 deriv. | — |
| 2026-09-03 | Brian L Roberts | Chairman of Board & Co-CEO | G | −101,900 | — |
| 2026-08-18 | Edward D Breen | Director | G | −62,440 | — |
| 2026-08-06 | Brian L Roberts | Chairman of Board & Co-CEO | G | −204,100 | — |
| 2026-08-06 | Brian L Roberts | Chairman of Board & Co-CEO | G | −204,100 | — |
| 2026-07-02 | Gordon Smith | Director | A | +1,375 | — |
| 2026-07-02 | Louise F. Brady | Director | A | +1,375 | — |
| 2026-07-02 | Edward D Breen | Director | A | +815 | — |
| 2026-07-02 | Jeffrey A Honickman | Director | A | +1,783 | — |
| 2026-07-02 | Thomas J Baltimore Jr | Director | A | +1,375 | — |
| 2026-05-20 | Brian L Roberts | Chairman of Board & Co-CEO | G | −202,500 | — |
| 2026-05-12 | Edward D Breen | Director | G | +32,440 | — |
| 2026-04-03 | Daniel C. Murdock | EVP & Chief Accounting Officer | MIXED | +3,195 | −$57.90K |
| 2026-04-02 | Thomas J Baltimore Jr | Director | A | +1,176 | — |
| 2026-04-02 | Louise F. Brady | Director | A | +1,176 | — |
| 2026-04-02 | Edward D Breen | Director | A | +697 | — |
| 2026-04-02 | Jeffrey A Honickman | Director | A | +1,524 | — |
| 2026-04-02 | Gordon Smith | Director | A | +1,176 | — |
| 2026-03-18 | Edward D Breen | Director | G | +30,000 | — |
| 2026-03-18 | Jennifer Khoury | Chief Communications Officer | MIXED | +353 | −$7.86K |
| 2026-03-06 | Jason Armstrong | CFO | MIXED | — | −$247.76K |
| 2026-03-03 | Thomas J. Reid | Chief Legal Officer, Secretary | MIXED | +44,477 | −$1.51M |
| 2026-03-03 | Daniel C. Murdock | EVP & Chief Accounting Officer | MIXED | +10,088 | −$101.55K |
| 2026-03-03 | Jason Armstrong | CFO | MIXED | +55,648 | −$1.48M |
| 2026-03-03 | Jennifer Khoury | Chief Communications Officer | MIXED | +3,751 | −$188.86K |
| 2026-03-03 | Michael J Cavanagh | Co-CEO | MIXED | — | −$1.08M |
| 2026-03-03 | Brian L Roberts | Chairman of Board & Co-CEO | MIXED | — | −$1.41M |
| 2026-02-26 | Brian L Roberts | Chairman of Board & Co-CEO | A | +428,438 deriv. | — |
| 2026-02-26 | Michael J Cavanagh | Co-CEO | A | +325,987 deriv. | — |
| 2026-02-26 | Jason Armstrong | CFO | A | +93,142 deriv. | — |
| 2026-02-26 | Thomas J. Reid | Chief Legal Officer, Secretary | A | +93,142 deriv. | — |
| 2026-02-26 | Jennifer Khoury | Chief Communications Officer | A | +27,946 deriv. | — |
| 2026-02-13 | Michael J Cavanagh | Co-CEO | MIXED | — | −$3.15M |
| 2026-02-13 | Brian L Roberts | Chairman of Board & Co-CEO | MIXED | +76,667 | −$1.74M |
| 2026-02-05 | Gordon Smith | Director | A | +7,869 | — |
| 2026-02-04 | Asuka Nakahara | Director | Sell | −8,275 | −$245.77K |
| 2026-02-03 | Michael J Cavanagh | Co-CEO | I | −50,320 deriv. | — |
| 2026-02-03 | Daniel C. Murdock | EVP & Chief Accounting Officer | A | +57,452 deriv. | — |
| 2026-01-22 | Thomas J. Reid | Chief Legal Officer, Secretary | MIXED | +7,643 | −$131.16K |
| 2026-01-22 | Madeline S. Bell | Director | M | +5,096 | — |
| 2026-01-22 | Jason Armstrong | CFO | MIXED | +4,200 | −$112.26K |
| 2026-01-22 | Daniel C. Murdock | EVP & Chief Accounting Officer | MIXED | +1,131 | −$13.57K |
| 2026-01-22 | Thomas J Baltimore Jr | Director | A | +1,189 | — |
| 2026-01-22 | Louise F. Brady | Director | A | +1,189 | — |
| 2026-01-22 | Edward D Breen | Director | A | +705 | — |
| Insider | Role | Shares Held | Value |
|---|---|---|---|
| Brian L Roberts | Chairman of Board & Co-CEO | 21,164,247 | $483.39M |
| David C Novak | Director | 391,351 | $8.94M |
| Jeffrey A Honickman | Director | 298,777 | $6.82M |
| Michael J Cavanagh | Co-CEO | 277,173 | $6.33M |
| Thomas J. Reid | Chief Legal Officer, Secretary | 223,474 | $5.10M |
| Jason Armstrong | CFO | 172,399 | $3.94M |
| Daniel C. Murdock | EVP & Chief Accounting Officer | 62,362 | $1.42M |
| Jennifer Khoury | Chief Communications Officer | 60,538 | $1.38M |
| Asuka Nakahara | Director | 57,957 | $1.32M |
| Madeline S. Bell | Director | 57,259 | $1.31M |
| Edward D Breen | Director | 47,422 | $1.08M |
| Thomas J Baltimore Jr | Director | 43,856 | $1.00M |
| Kenneth J Bacon | Director | 41,746 | $953.48K |
| Louise F. Brady | Director | 36,809 | $840.73K |
| Wonya Y Lucas | Director | 21,077 | $481.41K |
| Gordon Smith | Director | 12,221 | $279.13K |
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.
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.