Transactions
15
Insider / COMCAST CORP
Cavanagh Michael J
Co-CEO at COMCAST CORP
- Company
- COMCAST CORP
- Ticker
- CMCSA
- First filing on record
- January 6, 2026
- Latest trade on record
- September 1, 2026
- SEC filings
- EDGAR ↗
Cavanagh Michael J, Co-CEO at COMCAST CORP, has disclosed 15 transactions in CMCSA since January 6, 2026: 0 purchases (0 open-market buys) and 4 sales, worth about $95.0M at the reported prices. The latest was filed September 3, 2026, 2 days after the trade.
Open-market buys
0
Sales
4
Avg. disclosure lag
2.1d
Trading in charts
Trade timeline
When does this person trade, how big, and in which direction? Every trade in the last 12 months.
Bought (above the line)Sold (below the line)Other transaction
In the last 12 months Cavanagh Michael J made no purchases and 4 sales worth $25M, plus 11 other transactions. Dot size is the dollar amount.
Portfolio mix
Which stocks does this person trade most? Tile size is dollars traded, all time on record.
Cavanagh Michael J has traded 1 stock on record; the largest by dollars is CMCSA.
Reporting lag
Does this person report on time? One bar per filing against the Form 4 deadline.
On timeLate
0 of 6 filings on record were reported after the Form 4 deadline (two business days, counted here as 4 calendar days).
What kind of transactions
Most Form 4 rows are pay arriving or tax being withheld, not a decision to buy or sell. Only code P is an open-market purchase and code S an open-market sale. What each code means: Form 4 transaction codes.
| Code | Meaning | Rows | Shares | Value |
|---|---|---|---|---|
| M | Option exercise or conversion | 6 | 1,542,436 | $41.8M |
| I | Discretionary transaction | 4 | 1,057,170 | $28.1M |
| F | Shares withheld for tax | 3 | 713,271 | $23.2M |
| A | Grant or award | 1 | 325,987 | — |
| S | Open-market sale | 1 | 57,947 | $1.9M |
| Year | Rows | Bought | Sold |
|---|---|---|---|
| 2026 | 15 | 0 | 4 · $25.1M |
Transactions
| Security | Side | Trade date | Disclosed | Lag | Shares | Price | Value | Flags | Source | Share |
|---|---|---|---|---|---|---|---|---|---|---|
| CMCSA | Other I | September 1, 2026 | September 3, 2026 | 2d | 565,642 | $26 | $14.9M | derivative | Form 4 ↗ | |
| CMCSA | Other I | September 1, 2026 | September 3, 2026 | 2d | 392,769 | $26 | $10.3M | derivative | Form 4 ↗ | |
| CMCSA | Option / conversion M | March 1, 2026 | March 3, 2026 | 2d | 34,980 | — | — | derivative | Form 4 ↗ | |
| CMCSA | Sell F | March 1, 2026 | March 3, 2026 | 2d | 34,980 | $31 | $1.1M | Form 4 ↗ | ||
| CMCSA | Option / conversion M | March 1, 2026 | March 3, 2026 | 2d | 34,980 | — | — | Form 4 ↗ | ||
| CMCSA | Other A | February 24, 2026 | February 26, 2026 | 2d | 325,987 | — | — | derivative | Form 4 ↗ | |
| CMCSA | Option / conversion M | February 11, 2026 | February 13, 2026 | 2d | 441,743 | $28 | $12.5M | indirectderivative | Form 4 ↗ | |
| CMCSA | Option / conversion M | February 11, 2026 | February 13, 2026 | 2d | 294,495 | $28 | $8.4M | derivative | Form 4 ↗ | |
| CMCSA | Sell F | February 11, 2026 | February 13, 2026 | 2d | 383,796 | $33 | $12.5M | indirect | Form 4 ↗ | |
| CMCSA | Sell S | February 11, 2026 | February 13, 2026 | 2d | 57,947 | $33 | $1.9M | indirect | Form 4 ↗ | |
| CMCSA | Option / conversion M | February 11, 2026 | February 13, 2026 | 2d | 441,743 | $28 | $12.5M | indirect | Form 4 ↗ | |
| CMCSA | Sell F | February 11, 2026 | February 13, 2026 | 2d | 294,495 | $33 | $9.6M | Form 4 ↗ | ||
| CMCSA | Option / conversion M | February 11, 2026 | February 13, 2026 | 2d | 294,495 | $28 | $8.4M | Form 4 ↗ | ||
| CMCSA | Other I | February 2, 2026 | February 3, 2026 | 1d | 50,320 | $30 | $1.5M | derivative | Form 4 ↗ | |
| CMCSA | Other I | January 2, 2026 | January 6, 2026 | 4d | 48,439 | $30 | $1.4M | derivative | Form 4 ↗ |
Filings
| Filed | Form | Accession | Rows | Status | Source |
|---|---|---|---|---|---|
| September 3, 2026 | Form 4 | 0001225208-26-007616 | 2 | published | EDGAR ↗ |
| March 3, 2026 | Form 4 | 0001225208-26-002963 | 3 | published | EDGAR ↗ |
| February 26, 2026 | Form 4 | 0001225208-26-002692 | 1 | published | EDGAR ↗ |
| February 13, 2026 | Form 4 | 0001225208-26-001888 | 7 | published | EDGAR ↗ |
| February 3, 2026 | Form 4 | 0001225208-26-001165 | 1 | published | EDGAR ↗ |
| January 6, 2026 | Form 4 | 0001225208-26-000361 | 1 | published | EDGAR ↗ |
Other insiders at COMCAST CORP
- Murdock Daniel C. EVP & Chief Accounting Officer 19 rows
- BREEN EDWARD D Executive Chair 18 rows
- Armstrong Jason CFO 17 rows
- ROBERTS BRIAN L Chairman of Board & CEO 16 rows
- Khoury Jennifer Chief Communications Officer 13 rows
- Baltimore Thomas J Jr Director 12 rows
- Reid Thomas J. Chief Legal Officer, Secretary 9 rows
- Smith Gordon Director 9 rows
- Brady Louise F. Director 6 rows
- Honickman Jeffrey A Director 6 rows
Everyone on file, with contracts and lobbying under the company's name: COMCAST CORP.
Guides for this page
- What is SEC Form 4? Who files: officers, directors and owners of more than 10% of a class of the company's shares.
- Form 4 transaction codes P = purchase. S = sale. These are the two market trades.
- Insider buying vs insider selling Selling outweighs buying by a wide margin in normal times.
- Options and derivatives on Form 4 Table I = shares. Table II = options and other derivatives.
- What disclosure data cannot tell you Filings are late by design: up to 45 days for Congress, two business days for insiders.
Sources and method
| Source | Filings | Rows | First filed | Newest filed | Read the originals |
|---|---|---|---|---|---|
| SEC EDGAR, Form 4 | 6 | 15 | January 6, 2026 | September 3, 2026 | Form 4 list on EDGAR |
Site built October 27, 2026. Every row in the tables above links to its own filing. To quote a figure, use the Cite button at the top of the page; see how to cite and reuse.
Every row comes from the reporting owner's Form 4 as filed with the SEC (EDGAR ownership XML), read daily. "Value" is shares × the reported price; code P is an open-market purchase, S a sale, M an option exercise, A a grant. The lag is the filing date minus the trade date; Form 4 is due within two business days. Amendments (4/A) are not merged. Details on the methodology page; report an error on corrections.
Not investment advice. Figures are public disclosures shown as filed; they may lag the trade and may be amended later. No recommendation is made or implied.