As of the latest Form 4 filed Jul 2, 2026.
What Comcast Corp insiders — officers, directors and 10% owners — have bought and sold in their own stock, straight from their SEC Form 4 filings. Values are shares × the reported transaction price where both are disclosed.
Buys plotted up, sells down; bar height is the disclosed dollar value (shares × reported price). Our Form 4 history is only complete from mid-2026, so early months are sparse — the series fills in as more filings land. Open-market purchases and sales only.
Newest filing first — the 29 most recent filings for CMCSA.
| Filed | Trade date | Insider | Transaction | Shares | Price | Value | 10b5-1 | Filing |
|---|---|---|---|---|---|---|---|---|
| 2026-07-02 | 2026-06-30 | Smith Gordon Director | AAward | +1.38K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-07-02 | 2026-06-30 | Honickman Jeffrey A Director | AAward | +1.78K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-07-02 | 2026-06-30 | BREEN EDWARD D Director | AAward | +815.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-07-02 | 2026-06-30 | Brady Louise F. Director | AAward | +1.38K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-07-02 | 2026-06-30 | Baltimore Thomas J Jr Director | AAward | +1.38K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-20 | 2026-05-19 | ROBERTS BRIAN L Chairman of Board & Co-CEO | GGift | −203K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-05-12 | 2026-05-11 | BREEN EDWARD D Director | GGift | +32.4K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-03 | 2026-04-03 | Murdock Daniel C. EVP & Chief Accounting Officer | FTax | −2.07K | $27.93 | $57.9K | No | Form 4 ↗ |
| 2026-04-03 | 2026-04-03 | Murdock Daniel C., EVP & Chief Accounting Officer | MExercise | +5.27K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-02 | 2026-03-31 | Smith Gordon Director | AAward | +1.18K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-02 | 2026-03-31 | Honickman Jeffrey A Director | AAward | +1.52K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-02 | 2026-03-31 | BREEN EDWARD D Director | AAward | +697.00 | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-02 | 2026-03-31 | Brady Louise F. Director | AAward | +1.18K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-04-02 | 2026-03-31 | Baltimore Thomas J Jr Director | AAward | +1.18K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-18 | 2026-03-17 | Khoury Jennifer Chief Communications Officer | FTax | −10.5K | $30.08 | $316K | No | Form 4 ↗ |
| 2026-03-18 | 2026-03-17 | Khoury Jennifer, Chief Communications Officer | MExercise | +10.9K | $28.38 | $308K | No | Form 4 ↗ |
| 2026-03-18 | 2026-03-17 | BREEN EDWARD D Director | GGift | +30.0K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-03-06 | 2026-03-05 | Armstrong Jason CFO | FTax | −69.0K | $31.75 | $2.19M | No | Form 4 ↗ |
| 2026-03-06 | 2026-03-05 | Armstrong Jason, CFO | SSale | −4.49K | $31.74 | $143K | No | Form 4 ↗ |
| 2026-03-06 | 2026-03-05 | Armstrong Jason, CFO | MExercise | +73.5K | $28.38 | $2.09M | No | Form 4 ↗ |
| 2026-02-13 | 2026-02-11 | ROBERTS BRIAN L Chairman of Board & Co-CEO | FTax | −908K | $32.70 | $29.7M | No | Form 4 ↗ |
| 2026-02-13 | 2026-02-11 | ROBERTS BRIAN L, Chairman of Board & Co-CEO | MExercise | +984K | $28.38 | $27.9M | No | Form 4 ↗ |
| 2026-02-13 | 2026-02-11 | Cavanagh Michael J Co-CEO | FTax | −384K | $32.67 | $12.5M | No | Form 4 ↗ |
| 2026-02-13 | 2026-02-11 | Cavanagh Michael J, Co-CEO | SSale | −57.9K | $32.66 | $1.89M | No | Form 4 ↗ |
| 2026-02-13 | 2026-02-11 | Cavanagh Michael J, Co-CEO | MExercise | +442K | $28.38 | $12.5M | No | Form 4 ↗ |
| 2026-02-13 | 2026-02-11 | Cavanagh Michael J, Co-CEO | FTax | −294K | $32.66 | $9.62M | No | Form 4 ↗ |
| 2026-02-13 | 2026-02-11 | Cavanagh Michael J, Co-CEO | MExercise | +294K | $28.38 | $8.36M | No | Form 4 ↗ |
| 2026-02-05 | 2026-02-04 | Smith Gordon Director | AAward | +7.87K | $0.00 | $0.00 | No | Form 4 ↗ |
| 2026-02-04 | 2026-02-03 | NAKAHARA ASUKA Director | SSale | −8.28K | $29.70 | $246K | No | Form 4 ↗ |
Insiders — a company’s officers, directors and holders of more than 10% of its stock — must report any trade in that stock to the SEC on a Form 4 within two business days. Each row here is one transaction from those filings.
The transaction code tells you what happened: Purchase (P) and Sale (S) are open-market trades — the ones markets watch most; Award (A) is a granted stock or unit, Option exercise (M) converts options into shares, and Gift (G) is a transfer for no consideration. Awards, exercises and gifts are largely compensation or administrative, not a directional bet.
One caveat on sales: many are made under a Rule 10b5-1 plan scheduled months in advance, so a sale is not automatically a bearish signal. Insider activity is a noisy input — read it alongside the filings, not on its own.
See also CMCSA’s full analysis or the market-wide insider trading feed. The tabs above jump to CMCSA’s other SEC data.
Source: SEC Form 4 filings for CMCSA, parsed from EDGAR. Transaction prices are as reported in the filing — SEC public-domain data, not market quotes. Values are shares × reported price where both are disclosed; grants and gifts often carry no price. A delayed record of what insiders reported, not a live position or a recommendation.
Research and education only — not financial advice. TENKis not a registered investment adviser or broker-dealer and gives no personalized advice. Every call is impersonal — identical for all users, generated on a schedule from SEC filings plus a delayed/third-party price feed — may be wrong or out of date, and is not a recommendation to buy or sell any security. The operator and an affiliated trading operation may hold or trade the securities TENK rates; see Disclosures. Past performance does not guarantee future results. Do your own research.