CMCSA
−$29.2K
944 sh @ $31
CMCSA
COMCAST CORP
SEC CIK 1166691
$22.69
−27.2% · 90 days
90-day buys
$0
0 open-market
90-day sells
$0
0 open-market
Net insider flow
+$0
Net buying
Filings shown
48
Most recent
Revenue (FY2025)
$123.71B
+0.0% YoY
Net income (FY2025)
$20B
Reported
Total assets
$272.63B
Balance sheet
Source
SEC XBRL
From 10-K/10-Q
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At a glance
Insiders at CMCSA have made no open-market trades in the last 90 days — the activity below is grants, option exercises, and other routine filings.
Largest recent trade: Watson David N sold $9.56M of CMCSA, trimming their stake 22%.
Most active filer: Cavanagh Michael J, with 10 transactions among the recent filings shown.
Insider transaction history
Form 4 filings for CMCSA, newest firstCMCSA
−$31.3K
1,012 sh @ $31
CMCSA
+$0
93,142 sh
CMCSA
−$1.51M
48,665 sh @ $31
CMCSA
+$27.94M
984,320 sh @ $28
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CMCSA
−$29.68M
907,653 sh @ $33
CMCSA
+$8.36M
294,495 sh @ $28
CMCSA
−$9.62M
294,495 sh @ $33
CMCSA
+$12.54M
441,743 sh @ $28
CMCSA
−$1.89M
57,947 sh @ $33
CMCSA
−$12.54M
383,796 sh @ $33
CMCSA
+$0
7,869 sh
CMCSA
−$245.8K
8,275 sh @ $30
CMCSA
−$1.09M
25,537 sh @ $43
CMCSA
−$4.58M
107,622 sh @ $43
CMCSA
−$5.29M
114,749 sh @ $46
CMCSA
−$2.99M
65,410 sh @ $46
CMCSA
−$9.56M
181,281 sh @ $53
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About CMCSA insider activity
This page tracks every recent Form 4 filed for COMCAST CORP with the U.S. Securities and Exchange Commission. Form 4 is the disclosure that company insiders — officers, directors, and holders of more than 10% of the stock — must file within two business days of buying or selling shares.
The summary above nets open-market purchases against open-market sales over the trailing 90 days. Open-market trades (codes P and S) tend to carry the most signal because they reflect a deliberate choice to put money in or take it out, as opposed to routine grants, option exercises, or tax-withholding events. Use the badges on each row to tell them apart, and always confirm details against the original filing before drawing conclusions.
Frequently asked questions
How often is CMCSA insider data updated?
Continuously. We read from SEC EDGAR, so new Form 4 filings for COMCAST CORP usually appear here within minutes of being accepted by the SEC.
What does "net insider flow" mean?
It is the total dollar value of open-market insider purchases minus open-market sales over the last 90 days. A positive number (green) means insiders bought more than they sold; a negative number (red) means the reverse.
Why do some rows show grants or option exercises instead of buys?
Insiders receive stock through compensation as well as buying it outright. Form 4 captures all of these. We label each transaction by its SEC code so you can focus on open-market activity if you prefer.
Is this investment advice?
No. InsiderSource presents public filing data for informational purposes only. Insider activity is one of many factors to consider and is never a recommendation to buy or sell.