Insider trading

Period: 120 months Stock: CMCSA Minimum amount: $100K × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

92 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

92 decisions over 120 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

92 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

92 decisions over 120 months Remove this filter
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
92 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
92 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

92 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
5 Mar 2026
Sold at will
$142.62K 4,494 at 31.74
2.6%
Not planned
11 Feb 2026
Cavanagh Michael J Co-CEO · indirect
Sold at will
$1.89M 57,947 at 32.66
8.5%
Not planned
3 Feb 2026
NAKAHARA ASUKA Director
Sold at will
$245.77K 8,275 at 29.70
12.5%
Not planned
27 Nov 2024
ROBERTS BRIAN L Chairman of Board & CEO
Sold at will
$10.06M 235,051 at 42.80
3.5%
Not planned
26 Nov 2024
ROBERTS BRIAN L Chairman of Board & CEO
Sold at will
$10.00M 234,464 at 42.66
3.4%
Not planned
26 Nov 2024
Cavanagh Michael J President · indirect
Sold at will
$4.58M 107,622 at 42.53
19.2%
Not planned
26 Nov 2024
Cavanagh Michael J President
Sold at will
$1.09M 25,537 at 42.59
4.6%
Not planned
22 Nov 2024
BACON KENNETH J Director
Sold at will
$625.09K 14,408 at 43.39
30.6%
Not planned
6 Nov 2024
Sold at will 2×
$1.04M 23,248 at 44.84
22.5%
Not planned
29 Jan 2024
Cavanagh Michael J President
Sold at will
$5.29M 114,749 at 46.10
100%
Sold half or more
20 Nov 2023
Sold at will 2×
$1.78M 41,663 at 42.63
74.2%
Sold half or more
14 Nov 2023
ROBERTS BRIAN L Chairman of Board & CEO · indirect
Sold at will
$25.83M 616,143 at 41.92
3.5%
Not planned
27 May 2022
Murdock Daniel C. EVP & Chief Accounting Officer
Sold, plan not stated
$397.34K 8,929 at 44.50
83.1%
Sold half or more
11 Mar 2022
WATSON DAVID N CEO - Comcast Cable
Sold, plan not stated
$2.99M 65,410 at 45.69
9.9%
4 Jun 2021
BACON KENNETH J Director
Sold, plan not stated
$229.33K 4,031 at 56.89
12.0%
10 May 2021
BACON KENNETH J Director
Sold, plan not stated
$233.33K 3,966 at 58.83
10.6%
3 May 2021
Murdock Daniel C. EVP & Chief Accounting Officer
Sold, plan not stated
$557.46K 9,800 at 56.89
99.7%
Sold half or more
30 Apr 2021
ROBERTS BRIAN L Chairman of Board, Pres. & CEO · indirect
Sold, plan not stated
$39.17M 709,673 at 55.20
8.7%
4 Mar 2021
Sold, plan not stated
$1.81M 32,891 at 54.89
47.8%
4 Mar 2021
Sold, plan not stated
$325.41K 6,000 at 54.24
49.2%
11 Feb 2021
WATSON DAVID N Sr. EVP
Sold, plan not stated
$9.56M 181,281 at 52.75
22.0%
2 Dec 2020
SHELL JEFF CEO - NBCUniversal
Sold, plan not stated
$285.94K 5,582 at 51.23
1.6%
3 Aug 2020
SHELL JEFF CEO - NBCUniversal
Sold, plan not stated
$4.27M 99,484 at 42.91
15.9%
15 Jun 2020
Murdock Daniel C. SVP & Chief Accounting Officer
Sold, plan not stated
$175.09K 4,536 at 38.60
58.6%
Sold half or more
8 May 2020
Sold, plan not stated
$571.12K 15,660 at 36.47
39.4%
16 Mar 2020
WATSON DAVID N Sr. EVP
Sold, plan not stated 2×
$7.51M 202,782 at 37.05
22.5%
6 Feb 2020
ROBERTS BRIAN L Chairman of Board, Pres. & CEO
Sold, plan not stated
$22.93M 513,706 at 44.64
12.4%
16 Dec 2019
COHEN DAVID L Sr. EVP
Sold, plan not stated
$16.33M 373,508 at 43.71
35.3%
16 Dec 2019
COHEN DAVID L Sr. EVP · indirect
Sold, plan not stated
$11.41M 260,195 at 43.83
24.6%
16 Dec 2019
WATSON DAVID N Sr. EVP
Sold, plan not stated
$3.41M 78,100 at 43.67
13.2%
29 Oct 2019
BONOVITZ SHELDON M Director · indirect
Sold, plan not stated
$254.64K 5,600 at 45.47
5.4%
28 Oct 2019
ROBERTS BRIAN L Chairman of Board, Pres. & CEO
Sold, plan not stated
$22.86M 508,248 at 44.98
12.4%
4 Sep 2019
BACON KENNETH J Director
Sold, plan not stated
$180.14K 4,000 at 45.03
11.9%
26 Apr 2019
BURKE STEPHEN B Sr. EVP
Sold, plan not stated 3×
$19.84M 457,633 at 43.35
39.9%
23 Apr 2019
COHEN DAVID L Sr. EVP
Sold, plan not stated
$187.08K 4,467 at 41.88
1.7%
17 Apr 2019
COHEN DAVID L Sr. EVP
Sold, plan not stated
$187.66K 4,468 at 42.00
1.7%
29 Mar 2019
COHEN DAVID L Sr. EVP · indirect
Sold, plan not stated
$4.78M 120,000 at 39.86
13.1%
28 Mar 2019
COHEN DAVID L Sr. EVP
Sold, plan not stated 4×
$998.46K 24,771 at 40.31
9.0%
26 Mar 2019
BLOCK ARTHUR R EVP, GC and Secretary
Sold, plan not stated
$246.54K 6,260 at 39.38
8.6%
25 Mar 2019
BLOCK ARTHUR R EVP, GC and Secretary
Sold, plan not stated 2×
$296.18K 7,505 at 39.46
9.5%
22 Mar 2019
COHEN DAVID L Sr. EVP
Sold, plan not stated 2×
$1.09M 27,542 at 39.74
9.1%
22 Mar 2019
BLOCK ARTHUR R EVP, GC and Secretary
Sold, plan not stated 2×
$347.65K 8,719 at 39.87
13.0%
21 Mar 2019
COHEN DAVID L Sr. EVP
Sold, plan not stated 3×
$519.77K 13,141 at 39.55
3.9%
21 Mar 2019
BLOCK ARTHUR R EVP, GC and Secretary
Sold, plan not stated 2×
$309.04K 7,857 at 39.33
8.4%
19 Mar 2019
ROBERTS BRIAN L Chairman of Board, Pres. & CEO
Sold, plan not stated
$8.13M 203,933 at 39.89
4.3%
21 Feb 2019
WATSON DAVID N Sr. EVP
Sold, plan not stated
$7.70M 201,007 at 38.31
24.6%
19 Feb 2019
COHEN DAVID L Sr. EVP
Sold, plan not stated
$6.22M 164,288 at 37.85
25.2%
19 Feb 2019
COHEN DAVID L Sr. EVP · indirect
Sold, plan not stated 2×
$3.06M 81,080 at 37.68
8.1%
12 Feb 2019
COHEN DAVID L Sr. EVP
Sold, plan not stated
$6.07M 163,581 at 37.12
25.1%
12 Feb 2019
COHEN DAVID L Sr. EVP · indirect
Sold, plan not stated 2×
$3.55M 95,356 at 37.20
8.7%
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