← United States · Coverage record
US · SEC FORM 4
COMCAST CORP
CMCSA · Nasdaq; NYSE · CIK 0001166691 · Communication Services · Telecom Services
INSIDER SIGNAL
0 qualifying P purchase groups
in the current 180-day scoring window
15 Form 4 transaction lines observed in the same window
0 sales · 15 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
—
Purchase breadth, concentration & cluster buying
These modules activate when qualifying purchases enter the 180-day research window.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot.—
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 69,389,724
- Previous report
- 79,928,949
- Avg daily volume
- 36,502,902
- Days to cover
- 1.9
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
No qualifying code P equity purchase is present in the local Form 4 history.
Form 4 evidence
83 transaction lines in the latest 365-day window; 789 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | Smith Gordon | Award / grant (A) | Class A Common Stock | 1,552 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Honickman Jeffrey A | Award / grant (A) | Class A Common Stock | 2,011 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Brady Louise F. | Award / grant (A) | Class A Common Stock | 1,552 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | Smith Gordon | Award / grant (A) | Class A Common Stock | 1,552 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Honickman Jeffrey A | Award / grant (A) | Class A Common Stock | 2,011 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Brady Louise F. | Award / grant (A) | Class A Common Stock | 1,552 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Baltimore Thomas J Jr | Award / grant (A) | Class A Common Stock | 1,552 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | BREEN EDWARD D | Award / grant (A) | Class A Common Stock | 920 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-02 | ROBERTS BRIAN L | Gift (G) | Class A Common Stock | 101,900 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-17 | BREEN EDWARD D | Gift (G) | Class A Common Stock | 62,440 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-08-05 | ROBERTS BRIAN L | Gift (G) | Class A Common Stock | 204,100 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | Smith Gordon | Award / grant (A) | Class A Common Stock | 1,375 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | Honickman Jeffrey A | Award / grant (A) | Class A Common Stock | 1,783 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | Brady Louise F. | Award / grant (A) | Class A Common Stock | 1,375 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | Baltimore Thomas J Jr | Award / grant (A) | Class A Common Stock | 1,375 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | BREEN EDWARD D | Award / grant (A) | Class A Common Stock | 815 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-19 | ROBERTS BRIAN L | Gift (G) | Class A Common Stock | 202,500 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-11 | BREEN EDWARD D | Gift (G) | Class A Common Stock | 32,440 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-03 | Murdock Daniel C. | Option exercise / conversion (M) | Class A Common Stock | 5,268 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-04-03 | Murdock Daniel C. | Tax withholding (F) | Class A Common Stock | 2,073 | USD 27.93 | USD 57,899 | SEC filing ↗ |
| 2026-03-17 | Khoury Jennifer | Option exercise / conversion (M) | Class A Common Stock | 10,867 | USD 28.38 | USD 308,405 | SEC filing ↗ |
| 2026-03-17 | Khoury Jennifer | Tax withholding (F) | Class A Common Stock | 10,514 | USD 30.08 | USD 316,261 | SEC filing ↗ |
| 2026-03-17 | BREEN EDWARD D | Gift (G) | Class A Common Stock | 30,000 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-05 | Armstrong Jason | Sale (S) | Class A Common Stock | 4,494 | USD 31.74 | USD 142,640 | SEC filing ↗ |
| 2026-03-05 | Armstrong Jason | Option exercise / conversion (M) | Class A Common Stock | 73,497 | USD 28.38 | USD 2,085,845 | SEC filing ↗ |
| 2026-03-05 | Armstrong Jason | Tax withholding (F) | Class A Common Stock | 69,003 | USD 31.75 | USD 2,190,845 | SEC filing ↗ |
| 2026-03-01 | Reid Thomas J. | Option exercise / conversion (M) | Class A Common Stock | 93,142 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-01 | Reid Thomas J. | Tax withholding (F) | Class A Common Stock | 48,665 | USD 30.96 | USD 1,506,668 | SEC filing ↗ |
| 2026-03-01 | ROBERTS BRIAN L | Option exercise / conversion (M) | Class A Common Stock | 45,578 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-01 | ROBERTS BRIAN L | Tax withholding (F) | Class A Common Stock | 45,578 | USD 30.96 | USD 1,411,095 | SEC filing ↗ |
| 2026-03-01 | Murdock Daniel C. | Option exercise / conversion (M) | Class A Common Stock | 13,368 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-01 | Murdock Daniel C. | Tax withholding (F) | Class A Common Stock | 3,280 | USD 30.96 | USD 101,549 | SEC filing ↗ |
| 2026-03-01 | Khoury Jennifer | Option exercise / conversion (M) | Class A Common Stock | 9,851 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | CMCSA |
| CIK | 0001166691 |
| Sector | Communication Services |
| Industry | Telecom Services Yahoo Finance |
| SEC SIC | 4841 Cable & Other Pay Television Services |
| Exchange | Nasdaq; NYSE |
Data coverage
| Local Form 4 history | 789 transaction lines from 2020-01-15 to 2026-09-30 0 P purchase lines · 39 S sale lines · 750 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.