What the executives and directors of Comcast actually did with their own shares, decoded from three years of SEC Form 4 filings.
The tape: three years of insider trades
Every marker sits at the exact price reported on the Form 4. The line is the monthly median of all prices insiders reported, so the chart needs no market feed; the gray strip is routine flow (vestings, tax withholding, gifts) that headlines love to miscount as selling.
Where the shares went, last 12 months
Every Form 4 movement decomposed: what flowed in (grants, vested equity, purchases) and what flowed out (tax withholding, plan sales, discretionary sales, gifts). Counted in shares, because grants carry no price.
Skin in the game
Directly held shares as reported after each trade, indexed to 100 five years back. Direct holdings only: trust and family-entity positions are per-entity in the filings and do not sum honestly, so this chart refuses to guess. The steps are the trades.
Who holds what
| Insider | Role | Shares held | Buys 12 m | Sales 12 m |
|---|---|---|---|---|
| ROBERTS BRIAN L Chairman of Board & Co-CEO | CEO | 22.8M | — | — |
| Cavanagh Michael J Co-CEO | CEO | 753.9K | — | $1.9M |
| NOVAK DAVID C | Director | 390.9K | — | — |
| Honickman Jeffrey A | Director | 271.9K | — | — |
| Reid Thomas J. Chief Legal Officer, Secretary | Officer | 223.5K | — | — |
| Armstrong Jason CFO | CFO | 172.4K | — | $143K |
| BREEN EDWARD D | Director | 89.8K | — | — |
| Khoury Jennifer Chief Communications Officer | Officer | 71.1K | — | — |
| HASSELL GERALD L | Director | 68.6K | — | — |
| Murdock Daniel C. EVP & Chief Accounting Officer | Officer | 64.4K | — | — |
| NAKAHARA ASUKA | Director | 58K | — | $246K |
| Bell Madeline S. | Director | 56.9K | — | — |
| BACON KENNETH J | Director | 41.7K | — | — |
| Baltimore Thomas J Jr | Director | 41.3K | — | — |
Open-market trade log
| Date | Insider | Type | Shares | Price | Value |
|---|---|---|---|---|---|
| 2026-03-05 | Armstrong Jason (CFO) | Discretionary sale | 4,494 | $31.74 | $143K |
| 2026-02-11 | Cavanagh Michael J (CEO) | Discretionary sale | 57.9K | $32.66 | $1.9M |
| 2026-02-03 | NAKAHARA ASUKA (Director) | Discretionary sale | 8,275 | $29.70 | $246K |
| 2024-11-27 | ROBERTS BRIAN L (CEO) | Discretionary sale | 235.1K | $42.80 | $10.1M |
| 2024-11-26 | ROBERTS BRIAN L (CEO) | Discretionary sale | 234.5K | $42.66 | $10M |
| 2024-11-26 | Cavanagh Michael J (Officer) | Discretionary sale | 25.5K | $42.59 | $1.1M |
| 2024-11-26 | Cavanagh Michael J (Officer) | Discretionary sale | 107.6K | $42.53 | $4.6M |
| 2024-11-22 | BACON KENNETH J (Director) | Discretionary sale | 14.4K | $43.39 | $625K |
| 2024-11-06 | Armstrong Jason (CFO) | Discretionary sale | 10K | $44.86 | $449K |
| 2024-11-06 | Armstrong Jason (CFO) | Discretionary sale | 13.2K | $44.83 | $594K |
| 2024-01-29 | Cavanagh Michael J (Officer) | Discretionary sale | 114.7K | $46.10 | $5.3M |
| 2023-11-20 | Armstrong Jason (CFO) | Discretionary sale | 6,471 | $42.60 | $276K |
| 2023-11-20 | Armstrong Jason (CFO) | Discretionary sale | 35.2K | $42.63 | $1.5M |
| 2023-11-14 | ROBERTS BRIAN L (CEO) | Discretionary sale | 616.1K | $41.92 | $25.8M |
| 2022-12-14 | BACON KENNETH J (Director) | Discretionary sale | 2,000 | $35.89 | $72K |
| 2022-05-27 | Murdock Daniel C. (Officer) | Discretionary sale | 8,929 | $44.50 | $397K |
| 2022-03-11 | WATSON DAVID N (CEO) | Discretionary sale | 65.4K | $45.69 | $3M |
| 2021-06-04 | BACON KENNETH J (Director) | Discretionary sale | 4,031 | $56.89 | $229K |
| 2021-05-10 | BACON KENNETH J (Director) | Discretionary sale | 3,966 | $58.83 | $233K |
| 2021-05-03 | Murdock Daniel C. (Officer) | Discretionary sale | 9,800 | $56.89 | $558K |
| 2021-04-30 | ROBERTS BRIAN L (CEO) | Discretionary sale | 709.7K | $55.20 | $39.2M |
| 2021-03-04 | Montiel Maritza Gomez (Director) | Discretionary sale | 6,000 | $54.24 | $325K |
| 2021-03-04 | Miller Adam Louis (Officer) | Discretionary sale | 32.9K | $54.89 | $1.8M |
| 2021-02-11 | WATSON DAVID N (Officer) | Discretionary sale | 181.3K | $52.75 | $9.6M |
| 2021-01-28 | Montiel Maritza Gomez (Director) | Discretionary sale | 1,000 | $49.95 | $50K |
| 2021-01-28 | Montiel Maritza Gomez (Director) | Discretionary sale | 1,000 | $50.00 | $50K |
| 2020-12-02 | SHELL JEFF (CEO) | Discretionary sale | 5,582 | $51.23 | $286K |
| 2020-08-24 | Murdock Daniel C. (Officer) | Discretionary sale | 848 | $42.87 | $36K |
| 2020-08-03 | SHELL JEFF (CEO) | Discretionary sale | 99.5K | $42.91 | $4.3M |
| 2020-06-15 | Murdock Daniel C. (Officer) | Discretionary sale | 4,536 | $38.60 | $175K |
| 2020-05-08 | BONOVITZ SHELDON M (Director) | Discretionary sale | 15.7K | $36.47 | $571K |
| 2020-04-16 | Murdock Daniel C. (Officer) | Discretionary sale | 919 | $37.53 | $34K |
| 2020-03-19 | Murdock Daniel C. (Officer) | Discretionary sale | 672 | $35.64 | $24K |
| 2020-03-18 | Murdock Daniel C. (Officer) | Discretionary sale | 919 | $36.23 | $33K |
| 2020-03-17 | Murdock Daniel C. (Officer) | Discretionary sale | 1,038 | $36.55 | $38K |
| 2020-03-16 | WATSON DAVID N (Officer) | Discretionary sale | 85.6K | $36.69 | $3.1M |
| 2020-03-16 | WATSON DAVID N (Officer) | Discretionary sale | 117.2K | $37.30 | $4.4M |
| 2020-02-20 | Murdock Daniel C. (Officer) | Discretionary sale | 1,176 | $45.80 | $54K |
| 2020-02-06 | ROBERTS BRIAN L (CEO) | Discretionary sale | 513.7K | $44.64 | $22.9M |
| 2019-12-16 | COHEN DAVID L (Officer) | Discretionary sale | 260.2K | $43.83 | $11.4M |
| 2019-12-16 | COHEN DAVID L (Officer) | Discretionary sale | 373.5K | $43.71 | $16.3M |
| 2019-12-16 | WATSON DAVID N (Officer) | Discretionary sale | 78.1K | $43.67 | $3.4M |
| 2019-10-29 | BONOVITZ SHELDON M (Director) | Discretionary sale | 5,600 | $45.47 | $255K |
| 2019-10-28 | ROBERTS BRIAN L (CEO) | Discretionary sale | 508.2K | $44.98 | $22.9M |
| 2019-09-04 | BACON KENNETH J (Director) | Discretionary sale | 4,000 | $45.03 | $180K |
| 2019-08-22 | Murdock Daniel C. (Officer) | Discretionary sale | 848 | $44.23 | $38K |
| 2019-06-13 | Murdock Daniel C. (Officer) | Discretionary sale | 1,701 | $41.46 | $71K |
| 2019-04-26 | BURKE STEPHEN B (Officer) | Discretionary sale | 68.9K | $43.59 | $3M |
| 2019-04-26 | BURKE STEPHEN B (Officer) | Discretionary sale | 149.4K | $43.29 | $6.5M |
| 2019-04-26 | BURKE STEPHEN B (Officer) | Discretionary sale | 239.3K | $43.31 | $10.4M |
| 2019-04-23 | COHEN DAVID L (Officer) | Discretionary sale | 4,467 | $41.88 | $187K |
| 2019-04-17 | COHEN DAVID L (Officer) | Discretionary sale | 4,468 | $42.00 | $188K |
| 2019-04-17 | Murdock Daniel C. (Officer) | Discretionary sale | 1,038 | $42.00 | $44K |
| 2019-03-29 | COHEN DAVID L (Officer) | Discretionary sale | 120K | $39.86 | $4.8M |
| 2019-03-28 | COHEN DAVID L (Officer) | Discretionary sale | 3,667 | $40.31 | $148K |
| 2019-03-28 | COHEN DAVID L (Officer) | Discretionary sale | 4,520 | $40.32 | $182K |
| 2019-03-28 | COHEN DAVID L (Officer) | Discretionary sale | 4,953 | $40.30 | $200K |
| 2019-03-28 | COHEN DAVID L (Officer) | Discretionary sale | 11.6K | $40.31 | $469K |
| 2019-03-26 | BLOCK ARTHUR R (Officer) | Discretionary sale | 6,260 | $39.38 | $247K |
| 2019-03-25 | BLOCK ARTHUR R (Officer) | Discretionary sale | 3,461 | $39.47 | $137K |
“Since trade” compares with the latest insider-implied price, not a market quote; this site carries no market data by design.
Filing hygiene
How to read this
A Form 4 transaction code decides everything. P is an open-market purchase and S an open-market sale; those two are the only codes where an insider chose to trade. A is a grant, M an option exercise or vesting, F shares withheld to cover tax, G a gift. Most “insiders dumped billions” headlines are code F and M mechanics.
Sales flagged 10b5-1 run on a plan the insider adopted in advance; since 2023 every Form 4 carries that flag. Buys have historically predicted returns, sales mostly have not, and this page states filings, not advice.