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SEC EDGAR · Forms 3/4/5Updated through Oct 30, 2026•70 filings

CMCSA

COMCAST CORP

No net buying or selling imbalance over the last 3 months

No net buyers or sellers account for the net balance. There is no cluster of three distinct buyers within 30 days. We found no CEO/CFO purchases over 12 months.

How to read this signal

Only open-market P purchases and S sales count toward the signal. Vesting, options, taxes and gifts remain in the source data but do not trigger alerts. Rule 10b5-1 trades are shown as informational.

JSON example

3-month balance

$0.00

0 buyers · 0 sellers

12-month purchases

$0.00

0 distinct insiders

12-month sales

$2,280,934

3 distinct insiders

Highlighted alerts

3

0 Rule 10b5-1 trades treated as informational

Buying cluster · 30 days

Fewer than three distinct buyers

CEO/CFO purchases · 12 months

No executive purchases found

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Form 4 raw → Raspberry

The value is in what we do not call a signal.

The SEC XML stores every transaction. Raspberry keeps that evidence, reads the footnotes and separates voluntary open-market activity from vesting, option exercises, gifts, tax withholding, stock purchase and dividend reinvestment plans and pre-programmed 10b5-1 trades.

100
Raw transactions
Everything returned by the filing
3
Voluntary view
P/S trades after deterministic checks
93
Administrative noise
Stored, never alerted
0
10b5-1
Shown as informational
SEC ownership XML facts
Code
A
Shares
1,552
Price
$0.00
Footnotes
—

No filing footnote was attached to this row.

Raspberry interpretation
Informational — no alert

Reason: administrative_code.

Verify in SEC EDGAR

Recent transactions

Voluntary purchases and sales; administrative noise stays hidden.

3 transactions

Armstrong Jason

CFO

SaleAlert
Shares
4,494
Price
$31.74
Value
$142,617
Open SEC filing

Cavanagh Michael J

Co-CEO

SaleAlert
Shares
57,947
Price
$32.66
Value
$1,892,549
Open SEC filing

NAKAHARA ASUKA

Director

SaleAlert
Shares
8,275
Price
$29.70
Value
$245,768
Open SEC filing

“Alert” means a voluntary, unscheduled transaction according to the filing; it is not an investment recommendation. Official source: SEC EDGAR.