Comcast Corp
CCZ- Exchange
- NYSE
- Industry
- Cable & Other Pay Television Services
- SEC CIK
- 0001166691
No open-market purchases or sales by Comcast Corp insiders were filed in the last 90 days; 1 institution reported holding it in 13F filings for Q2 2026, worth $17.7M in total; no superinvestor holds it.
Other share classesCMCSA
Four kinds of short-selling data, each measuring something different:
- Short interest: shares sold short and not yet bought back, as of a settlement date. FINRA publishes it twice a month, about eight business days after the settlement date.
- Daily short volume: shares sold short each day in off-exchange trades reported to FINRA. It counts trades, not open positions, and is published the next day.
- Fails-to-deliver: shares not delivered by the settlement date. The SEC publishes them twice a month, about two weeks late.
- ATS (dark pool) volume: weekly volume on alternative trading systems and other off-exchange venues. FINRA publishes it two to four weeks after the week.
More in the glossary.
Short interest
Shares sold short and not yet bought back, from FINRA, on every settlement date in the last two years.
- Short interest
- 268
- Shares, settlement Oct 30, 2026
- Change
- +24
- +9.8% vs. Oct 15, 2026
- Days to cover
- 1.00
- Short interest ÷ average daily volume
- Average daily volume
- 480
- Shares, as reported by FINRA
| Settlement date | Short interest | Change | Change % | Avg. daily volume | Days to cover |
|---|---|---|---|---|---|
| Oct 30, 2026 | 268 | +24 | +9.8% | 480 | 1.00 |
| Oct 15, 2026 | 244 | +11 | +4.7% | 159 | 1.53 |
| Sep 30, 2026 | 233 | +15 | +6.9% | 40 | 5.83 |
| Sep 15, 2026 | 218 | +112 | +105.7% | 15 | 14.53 |
| Aug 31, 2026 | 106 | −40 | −27.4% | 60 | 1.77 |
| Aug 14, 2026 | 146 | −6 | −4.0% | 207 | 1.00 |
| Jul 31, 2026 | 152 | −74 | −32.7% | 489 | 1.00 |
| Jul 15, 2026 | 226 | −30 | −11.7% | 28 | 8.07 |
| Jun 30, 2026 | 256 | +256 | +100.0% | 235 | 1.09 |
| Jan 30, 2026 | 2 | −69 | −97.2% | 30 | 1.00 |
| Jan 15, 2026 | 71 | +38 | +115.2% | 64 | 1.11 |
| Dec 31, 2025 | 33 | −87 | −72.5% | 93 | 1.00 |
| Dec 15, 2025 | 120 | +57 | +90.5% | 50 | 2.40 |
| Nov 28, 2025 | 63 | +19 | +43.2% | 20 | 3.15 |
| Nov 14, 2025 | 44 | −38 | −46.3% | 114 | 1.00 |
| Oct 31, 2025 | 82 | +52 | +173.3% | 65 | 1.26 |
| Oct 15, 2025 | 30 | +15 | +100.0% | 15 | 2.00 |
| Sep 30, 2025 | 15 | −19 | −55.9% | 10 | 1.50 |
| Sep 15, 2025 | 34 | 0 | 0.0% | 16 | 2.13 |
| Aug 29, 2025 | 34 | −35 | −50.7% | 7 | 4.86 |
| Aug 15, 2025 | 69 | +40 | +137.9% | 78 | 1.00 |
| Jul 31, 2025 | 29 | −21 | −42.0% | 19 | 1.53 |
| Jul 15, 2025 | 50 | +4 | +8.7% | 31 | 1.61 |
| Jun 30, 2025 | 46 | +27 | +142.1% | 11 | 4.18 |
| Jun 13, 2025 | 19 | −56 | −74.7% | 18 | 1.06 |
| May 30, 2025 | 75 | +75 | +100.0% | 19 | 3.95 |
| Apr 30, 2025 | 10 | +10 | +100.0% | 733 | 1.00 |
| Mar 14, 2025 | 6 | 0 | 0.0% | 1 | 6.00 |
| Feb 28, 2025 | 6 | −25 | −80.7% | 30 | 1.00 |
| Feb 14, 2025 | 31 | −77 | −71.3% | 11 | 2.82 |
| Jan 31, 2025 | 108 | −372 | −77.5% | 47 | 2.30 |
| Jan 15, 2025 | 480 | +98 | +25.7% | 75 | 6.40 |
| Dec 31, 2024 | 382 | −43 | −10.1% | 73 | 5.23 |
| Dec 13, 2024 | 425 | +321 | +308.7% | 2.75K | 1.00 |
| Nov 29, 2024 | 104 | −443 | −81.0% | 4.21K | 1.00 |
| Nov 15, 2024 | 547 | −1.49K | −73.1% | 8.31K | 1.00 |
| Oct 31, 2024 | 2.03K | −2.08K | −50.5% | 20.1K | 1.00 |
Fails-to-deliver
Shares that weren't delivered by the settlement date, from the SEC, for the last 30 dates with fails. The price is the previous day's closing price published by the SEC.
| Settlement date | Shares | Price | Value |
|---|---|---|---|
| Oct 13, 2026 | 19 | $65.00 | $1.24K |
| Aug 6, 2026 | 37 | $64.30 | $2.38K |
| Jun 16, 2026 | 43 | $64.00 | $2.75K |
| Jun 5, 2026 | 14 | $65.15 | $912.1 |
| Jun 4, 2026 | 104 | $64.94 | $6.75K |
| Jun 3, 2026 | 4 | $62.55 | $250.2 |
| May 11, 2026 | 14 | $64.70 | $905.8 |
| May 7, 2026 | 6 | $65.85 | $395.1 |
| May 4, 2026 | 103 | $64.90 | $6.68K |
| May 1, 2026 | 78 | $64.54 | $5.03K |
| Mar 30, 2026 | 88 | $63.04 | $5.55K |
| Mar 27, 2026 | 88 | $63.04 | $5.55K |
| Mar 26, 2026 | 120 | $63.04 | $7.56K |
| Mar 25, 2026 | 21 | $62.27 | $1.31K |
| Mar 24, 2026 | 21 | $62.27 | $1.31K |
| Dec 22, 2025 | 92 | $62.40 | $5.74K |
| Dec 19, 2025 | 92 | $63.00 | $5.80K |
| Dec 18, 2025 | 92 | $63.00 | $5.80K |
| Dec 16, 2025 | 20 | $61.37 | $1.23K |
| Dec 15, 2025 | 20 | $62.50 | $1.25K |
| Dec 12, 2025 | 59 | $62.50 | $3.69K |
| Dec 8, 2025 | 52 | $62.75 | $3.26K |
| Dec 5, 2025 | 51 | $62.75 | $3.20K |
| Dec 4, 2025 | 51 | $62.75 | $3.20K |
| Aug 12, 2025 | 99 | $60.85 | $6.02K |
| Aug 11, 2025 | 99 | $60.85 | $6.02K |
| Aug 7, 2025 | 35 | $59.00 | $2.06K |
| Aug 6, 2025 | 29 | $59.00 | $1.71K |
| Aug 5, 2025 | 29 | $59.00 | $1.71K |
| Aug 4, 2025 | 27 | $59.00 | $1.59K |
Daily short volume
Off-exchange short-sale volume, not short interest: shares sold short each day in trades reported to FINRA, for the last 30 trading days.
The short volume ratio isn't a sentiment gauge: market makers sell short to fill buy orders and to hedge, so short sales are usually about half of off-exchange volume.
| Trade date | Short volume | Short exempt | Off-exchange volume | Short volume ratio |
|---|---|---|---|---|
| Nov 13, 2026 | 10 | 0 | 11 | 90.9% |
| Nov 6, 2026 | 1 | 0 | 1 | 100.0% |
| Nov 3, 2026 | 12 | 0 | 12 | 100.0% |
| Nov 2, 2026 | 100 | 0 | 100 | 100.0% |
| Oct 30, 2026 | 49 | 49 | 49 | 100.0% |
| Oct 23, 2026 | 3 | 3 | 3 | 100.0% |
| Oct 21, 2026 | 4 | 0 | 51 | 7.8% |
| Oct 20, 2026 | 76 | 0 | 76 | 100.0% |
| Oct 12, 2026 | 29 | 0 | 33 | 87.9% |
| Oct 9, 2026 | 10 | 0 | 10 | 100.0% |
| Oct 8, 2026 | 27 | 0 | 28 | 96.4% |
| Oct 6, 2026 | 49 | 0 | 50 | 98.0% |
| Oct 2, 2026 | 1 | 0 | 2 | 50.0% |
| Sep 22, 2026 | 76 | 0 | 87 | 87.4% |
| Sep 15, 2026 | 14 | 0 | 15 | 93.3% |
| Sep 10, 2026 | 1 | 0 | 6 | 16.7% |
| Sep 9, 2026 | 2 | 0 | 4 | 50.0% |
| Aug 25, 2026 | 4 | 0 | 5 | 80.0% |
| Aug 24, 2026 | 5 | 0 | 6 | 83.3% |
| Aug 19, 2026 | 156 | 0 | 170 | 91.8% |
| Aug 18, 2026 | 3 | 0 | 4 | 75.0% |
| Aug 12, 2026 | 8 | 0 | 9 | 88.9% |
| Aug 11, 2026 | 1 | 1 | 5 | 20.0% |
| Aug 5, 2026 | 401 | 0 | 607 | 66.1% |
| Jul 23, 2026 | 2 | 0 | 3 | 66.7% |
| Jul 21, 2026 | 1,370 | 0 | 3,559 | 38.5% |
| Jul 20, 2026 | 23 | 0 | 24 | 95.8% |
| Jul 17, 2026 | 2 | 0 | 13 | 15.4% |
| Jun 29, 2026 | 37 | 0 | 38 | 97.4% |
| Jun 23, 2026 | 37 | 0 | 39 | 94.9% |
ATS (dark pool) volume
Weekly volume on alternative trading systems (ATS) and other off-exchange (OTC) venues, from FINRA, for the last 12 weeks. ATS share is ATS volume ÷ (ATS + OTC volume), not a share of all trading.
| Week of | Tier | ATS shares | ATS trades | Other OTC shares | Other OTC trades | ATS share |
|---|---|---|---|---|---|---|
| Oct 5, 2026 | T2 | – | – | 94 | 18 | – |
| Sep 28, 2026 | T2 | – | – | 44 | 15 | – |
| Sep 21, 2026 | T2 | 1 | 1 | 95 | 19 | 1.0% |
| Sep 14, 2026 | T2 | – | – | 24 | 15 | – |
| Sep 7, 2026 | T2 | – | – | 15 | 13 | – |
| Aug 31, 2026 | T2 | – | – | 6 | 9 | – |
| Aug 24, 2026 | T2 | – | – | 19 | 19 | – |
| Aug 17, 2026 | T2 | – | – | 220 | 26 | – |
| Aug 10, 2026 | T2 | 1 | 1 | 21 | 19 | 4.5% |
| Aug 3, 2026 | T2 | 2 | 2 | 718 | 26 | 0.3% |
| Jul 27, 2026 | T2 | – | – | 35 | 24 | – |
| Jul 20, 2026 | T2 | – | – | 4,093 | 63 | – |