Comcast Corporation
US ˙ NasdaqGS ˙ US20030N1019

SecurityCMCSA / Comcast Corporation
InstitutionCoastline Trust Co
Latest Disclosed Ownership16,848 shares
Latest Disclosed Value $ 483,706
Coastline Trust Co reports 16.19% decrease in ownership of CMCSA / Comcast Corporation

On April 3, 2026 - Coastline Trust Co filed a 13F-HR form disclosing ownership of 16,848 shares of Comcast Corporation (US:CMCSA) valued at $483,706 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 5, 2026 disclosing 20,102 shares of Comcast Corporation. This represents a change in shares of -16.19% during the quarter. The current value of the position is $396,265 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)
2026-04-03 2026-03-31 13F COMCAST CORP CL A 20030N101 16,848 -3,254 -16.19 484 -19.50 0.0480
2026-01-05 2025-12-31 13F COMCAST CORP CL A 20030N101 20,102 -35 -0.17 601 -5.06 0.0565
2025-10-21 2025-09-30 13F COMCAST CORP CL A 20030N101 20,137 -2,570 -11.32 633 -21.98 0.0679
2025-07-17 2025-06-30 13F COMCAST CORP CL A 20030N101 22,707 -507 -2.18 810 -5.37 0.0928
2025-04-28 2025-03-31 13F COMCAST CORP CL A 20030N101 23,214 -9,573 -29.20 857 -30.41 0.1065
2025-02-13 2024-12-31 13F Comcast CL A 20030N101 32,787 -27,518 -45.63 1,230 -51.15 0.1441
2024-11-06 2024-09-30 13F Comcast CL A 20030N101 60,305 1,250 2.12 2,519 8.91 0.2960
2024-07-15 2024-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 59,055 -1,500 -2.48 2,313 -11.92 0.2708
2024-04-26 2024-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 60,555 -8,035 -11.71 2,625 -12.70 0.3172
2024-01-23 2023-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 68,590 1,365 2.03 3,008 0.91 0.3999
2023-10-18 2023-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 67,225 -29,430 -30.45 2,981 -25.80 0.4395
2023-08-07 2023-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 96,655 177 0.18 4,016 9.82 0.5624
2023-05-31 2023-03-31 13F/A-1 COMCAST CORP-CL A COMMON STOCK 20030N101 96,478 -280 -0.29 3,657 8.10 0.5417
2023-04-12 2023-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 96,758 0 3,384 0.2765
2023-02-09 2022-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 96,758 11,920 14.05 3,384 35.97 0.5041
2022-11-03 2022-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 84,838 432 0.51 2,488 -24.88 0.3980
2022-07-22 2022-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 84,406 -2,544 -2.93 3,312 -18.64 0.4899
2022-05-04 2022-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 86,950 -4,260 -4.67 4,071 -11.33 0.4945
2022-02-10 2021-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 91,210 1,530 1.71 4,591 -8.47 0.5237
2021-11-09 2021-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 89,680 -3,401 -3.65 5,016 -5.48 0.6240
2021-08-10 2021-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 93,081 105 0.11 5,307 5.49 0.6568
2021-05-10 2021-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 92,976 -21,657 -18.89 5,031 -16.25 0.6486
2021-02-12 2020-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 114,633 -1,610 -1.39 6,007 11.70 0.8005
2020-10-15 2020-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 116,243 -15,345 -11.66 5,378 4.85 0.8084
2020-08-07 2020-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 131,588 -10,500 -7.39 5,129 4.99 0.8097
2020-06-10 2020-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 142,088 -9,200 -6.08 4,885 -28.19 0.8821
2020-01-15 2019-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 151,288 -9,366 -5.83 6,803 -6.07 0.9429
2019-10-18 2019-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 160,654 -26,259 -14.05 7,243 -8.35 1.0659
2019-07-18 2019-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 186,913 -9,214 -4.70 7,903 0.79 1.1488
2019-04-25 2019-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 196,127 -2,613 -1.31 7,841 15.87 1.1710
2019-01-15 2018-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 198,740 -4,062 -2.00 6,767 -5.77 1.1667
2018-10-17 2018-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 202,802 -13,451 -6.22 7,181 1.21 1.0292
2018-07-27 2018-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 216,253 -735 -0.34 7,095 -4.30 1.0698
2018-04-16 2018-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 216,988 -27,900 -11.39 7,414 -24.41 1.1391
2018-01-17 2017-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 244,888 19,232 8.52 9,808 12.94 1.4755
2017-11-17 2017-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 225,656 2,900 1.30 8,684 0.16 1.5143
2017-08-10 2017-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 222,756 -12,090 -5.15 8,670 -1.79 1.5715
2017-04-19 2017-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 234,846 113,843 94.08 8,828 5.66 1.6481
2017-01-17 2016-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 121,003 -1,335 -1.09 8,355 2.94 1.6413
2016-10-20 2016-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 122,338 -5,921 -4.62 8,116 -2.93 1.5878
2016-07-18 2016-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 128,259 -1,405 -1.08 8,361 5.57 1.6889
2016-04-15 2016-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 129,664 -920 -0.70 7,920 7.48 1.6896
2016-01-15 2015-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 130,584 -1,814 -1.37 7,369 -2.14 1.6178
2015-10-30 2015-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 132,398 -4,900 -3.57 7,530 -8.80 1.7143
2015-07-22 2015-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 137,298 -25 -0.02 8,257 6.49 1.7272
2015-04-17 2015-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 137,323 -12,365 -8.26 7,754 -10.71 1.5914
2015-01-21 2014-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 149,688 73,921 97.56 8,684 113.16 1.8136
2014-10-20 2014-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 75,767 -2,259 -2.90 4,074 -2.75 1.0677
2014-07-23 2014-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 78,026 -4,114 -5.01 4,189 1.92 1.0870
2014-05-09 2014-03-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 82,140 -4,343 -5.02 4,110 -8.54 1.0927
2014-02-14 2013-12-31 13F COMCAST CORP-CL A COMMON STOCK 20030N101 86,483 -15,659 -15.33 4,494 -2.47 1.2205
2013-11-12 2013-09-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 102,142 -6,860 -6.29 4,608 1.25 1.3548
2013-08-06 2013-06-30 13F COMCAST CORP-CL A COMMON STOCK 20030N101 109,002 109,002 4,551 1.4031
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.