Comcast Corporation
US ˙ NasdaqGS ˙ US20030N1019

SecurityCMCSA / Comcast Corporation
InstitutionShell Asset Management Co
Latest Disclosed Ownership7,415 shares
Latest Disclosed Value $ 233
Shell Asset Management Co reports 69.71% decrease in ownership of CMCSA / Comcast Corporation

On November 7, 2025 - Shell Asset Management Co filed a 13F-HR form disclosing ownership of 7,415 shares of Comcast Corporation (US:CMCSA) valued at $232,979 USD as of September 30, 2025. The entity filed a previous 13F-HR on July 23, 2025 disclosing 24,479 shares of Comcast Corporation. The current value of the position is $172,992 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2025-11-07 2025-09-30 13F COMCAST CORP CL A 20030N101 7,415 -17,064 -69.71 0 0.0234
2025-07-23 2025-06-30 13F COMCAST CORP CL A 20030N101 24,479 242 1.00 1 0.0302
2025-05-14 2025-03-31 13F COMCAST CORP CL A 20030N101 24,237 -1,267 -4.97 1 0.0424
2025-02-14 2024-12-31 13F COMCAST CORP CL A 20030N101 25,504 -4,690 -15.53 1 -100.00 0.0418
2024-11-07 2024-09-30 13F COMCAST CORP CL A 20030N101 30,194 -11,589 -27.74 1 0.00 0.0555
2024-07-25 2024-03-31 13F COMCAST CORP CL A 20030N101 41,783 -24,030 -36.51 2 -50.00 0.0745
2024-02-14 2023-12-31 13F COMCAST CORP CL A 20030N101 65,813 -56,106 -46.02 3 -60.00 0.1333
2023-11-08 2023-09-30 13F COMCAST CORP CL A 20030N101 121,919 -1,703 -1.38 5 0.00 0.2234
2023-07-28 2023-06-30 13F COMCAST CORP CL A 20030N101 123,622 -35,894 -22.50 5 -16.67 0.2026
2023-05-15 2023-03-31 13F COMCAST CORP CL A 20030N101 159,516 -331 -0.21 6 20.00 0.2510
2023-02-07 2022-12-31 13F COMCAST CORP CL A 20030N101 159,847 -29,770 -15.70 6 -99.91 0.2449
2022-11-14 2022-09-30 13F COMCAST CORP CL A 20030N101 189,617 -48,813 -20.47 5,561 -40.56 0.2167
2022-08-09 2022-06-30 13F COMCAST CORP CL A 20030N101 238,430 -9,172 -3.70 9,356 -19.30 0.2768
2022-05-04 2022-03-31 13F COMCAST CORP CL A 20030N101 247,602 -10,085 -3.91 11,593 -10.61 0.2736
2022-02-09 2021-12-31 13F COMCAST CORP CL A 20030N101 257,687 7,637 3.05 12,969 -7.26 0.2661
2021-11-04 2021-09-30 13F COMCAST CORP CL A 20030N101 250,050 -28,479 -10.22 13,985 -11.94 0.3140
2021-08-12 2021-06-30 13F COMCAST CORP CL A 20030N101 278,529 -28,736 -9.35 15,882 -4.47 0.3079
2021-05-10 2021-03-31 13F COMCAST CORP CL A 20030N101 307,265 -214,339 -41.09 16,626 -39.17 0.3327
2021-02-16 2020-12-31 13F COMCAST CORP CL A 20030N101 521,604 -208 -0.04 27,332 13.23 0.5644
2020-11-13 2020-09-30 13F COMCAST CORP CL A 20030N101 521,812 -40,540 -7.21 24,139 10.12 0.5612
2020-08-10 2020-06-30 13F COMCAST CORP CL A 20030N101 562,352 -133,649 -19.20 21,920 -8.40 0.5472
2020-05-11 2020-03-31 13F COMCAST CORP CL A 20030N101 696,001 -27,316 -3.78 23,929 -26.44 0.6667
2020-02-13 2019-12-31 13F COMCAST CORP CL A 20030N101 723,317 -53,172 -6.85 32,528 -7.07 0.7008
2019-11-12 2019-09-30 13F COMCAST CORP CL A 20030N101 776,489 -85,786 -9.95 35,004 -3.99 0.7994
2019-08-12 2019-06-30 13F COMCAST CORP CL A 20030N101 862,275 -21,765 -2.46 36,457 3.15 0.8067
2019-05-09 2019-03-31 13F COMCAST CORP CL A 20030N101 884,040 20,916 2.42 35,344 20.26 0.7793
2019-02-13 2018-12-31 13F COMCAST CORP CL A 20030N101 863,124 218,462 33.89 29,389 28.75 0.7325
2018-11-13 2018-09-30 13F COMCAST CORP CL A 20030N101 644,662 -1,601 -0.25 22,827 7.65 0.4505
2018-08-10 2018-06-30 13F COMCAST CORP CL A 20030N101 646,263 58,293 9.91 21,204 5.54 0.4347
2018-05-14 2018-03-31 13F COMCAST CORP CL A 20030N101 587,970 7,330 1.26 20,091 -13.61 0.4000
2018-02-09 2017-12-31 13F COMCAST CORP CL A 20030N101 580,640 9,476 1.66 23,255 5.81 0.4616
2017-10-20 2017-09-30 13F/A-1 COMCAST CORP CL A 20030N101 571,164 -229,467 -28.66 21,978 -29.47 0.4887
2017-10-18 2017-09-30 13F COMCAST CORP CL A 20030N101 326,797 -473,834 17,575
2017-07-26 2017-06-30 13F COMCAST CORP CL A 20030N101 800,631 12,003 1.52 31,161 5.11 0.7733
2017-04-26 2017-03-31 13F COMCAST CORP CL A 20030N101 788,628 395,634 100.67 29,645 9.25 0.7567
2017-01-10 2016-12-31 13F COMCAST CORP CL A 20030N101 392,994 -64,584 -14.11 27,136 -10.61 0.7337
2016-10-28 2016-09-30 13F COMCAST CORP CL A 20030N101 457,578 -27,315 -5.63 30,356 -3.97 0.7266
2016-07-25 2016-06-30 13F COMCAST CORP CL A 20030N101 484,893 158,995 48.79 31,610 58.80 0.7333
2016-05-11 2016-03-31 13F COMCAST CORP CL A 20030N101 325,898 1,900 0.59 19,906 8.88 0.4767
2016-02-05 2015-12-31 13F COMCAST CORP CL A 20030N101 323,998 187,558 137.47 18,283 150.45 0.4317
2015-10-13 2015-09-30 13F COMCAST CORP CL A SPL 20030N200 136,440 50,193 58.20 7,300 41.20 0.1157
2015-10-13 2015-09-30 13F COMCAST CORP CL A 20030N101 326,797 60,122 17,575 0.2785
2015-07-30 2015-06-30 13F COMCAST CORP CL A SPL 20030N200 86,247 -12,579 -12.73 5,170 -6.70 0.1034
2015-07-30 2015-06-30 13F COMCAST CORP CL A 20030N101 266,675 -27,830 16,038 0.3209
2015-05-07 2015-03-31 13F COMCAST CORP CL A SPL 20030N200 98,826 98,826 5,541 0.0965
2015-05-07 2015-03-31 13F COMCAST CORP CL A 20030N101 294,505 294,505 16,631 0.2896
2015-02-04 2014-12-31 13F COMCAST CORP CL A SPL 20030N200 0 -136,440 -100.00 0 -100.00
2014-10-24 2014-09-30 13F COMCAST CORP CL A SPL 20030N200 136,440 -243 -0.18 7,300 0.15 0.1133
2014-10-24 2014-09-30 13F COMCAST CORP CL A 20030N101 326,797 -5,043 17,575 0.2729
2014-08-08 2014-06-30 13F COMCAST CORP CL A SPL 20030N200 136,683 10,404 8.24 7,289 18.35 0.1123
2014-08-08 2014-06-30 13F COMCAST CORP CL A 20030N101 331,840 -35,586 17,813 0.2745
2014-05-07 2014-03-31 13F COMCAST CORP CL A SPL 20030N200 126,279 -394 -0.31 6,159 -2.52 0.1023
2014-05-07 2014-03-31 13F COMCAST CORP CL A 20030N101 367,426 5,102 18,386 0.3055
2014-02-03 2013-12-31 13F/A-1 COMCAST CORP CL A SPL 20030N200 126,673 3,783 3.08 6,318 18.60 0.1075
2014-02-03 2013-12-31 13F/A-1 COMCAST CORP CL A 20030N101 362,324 -176,000 18,828 0.3204
2014-01-27 2013-12-31 13F COMCAST CORP CL A SPL 20030N200 126,673 6,318
2014-01-27 2013-12-31 13F COMCAST CORP CL A 20030N101 362,324 18,828
2013-10-28 2013-09-30 13F COMCAST CORP CL A SPL 20030N200 122,890 -7,471 -5.73 5,327 3.02 0.0979
2013-10-28 2013-09-30 13F COMCAST CORP CL A 20030N101 538,324 -747 24,286 0.4461
2013-08-01 2013-06-30 13F COMCAST CORP CL A SPL 20030N200 130,361 130,361 5,171 0.0984
2013-08-01 2013-06-30 13F COMCAST CORP CL A 20030N101 539,071 408,710 22,506 0.4285
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.