Comcast Corporation
MX ˙ BMV ˙ US20030N1019
SecurityMX:CMCSA / Comcast Corporation
InstitutionGladstone Institutional Advisory LLC
Latest Disclosed Ownership30,816 shares
Latest Disclosed Value $ 884,734
Gladstone Institutional Advisory LLC reports 5.72% decrease in ownership of CMCSA / Comcast Corporation

On May 14, 2026 - Gladstone Institutional Advisory LLC filed a 13F-HR form disclosing ownership of 30,816 shares of Comcast Corporation (MX:CMCSA) valued at $884,734 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 32,684 shares of Comcast Corporation. This represents a change in shares of -5.72% during the quarter.

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)
2026-05-14 2026-03-31 13F COMCAST CORP CL A 20030N101 30,816 -1,868 -5.72 885 -9.43 0.0328
2026-02-17 2025-12-31 13F COMCAST CORP CL A 20030N101 32,684 -39,096 -54.47 977 -56.72 0.0369
2025-10-22 2025-09-30 13F COMCAST CORP CL A 20030N101 71,780 -14,349 -16.66 2,255 -26.62 0.0869
2025-08-12 2025-06-30 13F COMCAST CORP CL A 20030N101 86,129 -8,212 -8.70 3,074 -11.72 0.1270
2025-05-15 2025-03-31 13F COMCAST CORP CL A 20030N101 94,341 3,660 4.04 3,481 2.29 0.1623
2025-01-29 2024-12-31 13F COMCAST CORP CL A 20030N101 90,681 -10,018 -9.95 3,403 -19.09 0.1579
2024-10-28 2024-09-30 13F COMCAST CORP CL A 20030N101 100,699 -52,028 -34.07 4,206 -29.67 0.2054
2024-08-02 2024-06-30 13F COMCAST CORP CL A 20030N101 152,727 1,756 1.16 5,981 -8.62 0.3115
2024-05-14 2024-03-31 13F COMCAST CORP CL A 20030N101 150,971 -67,589 -30.92 6,545 -31.71 0.3591
2024-02-09 2023-12-31 13F COMCAST CORP CL A 20030N101 218,560 11,664 5.64 9,584 4.47 0.5375
2023-11-13 2023-09-30 13F COMCAST CORP CL A 20030N101 206,896 10,271 5.22 9,174 12.29 0.5940
2023-08-10 2023-06-30 13F COMCAST CORP CL A 20030N101 196,625 16,289 9.03 8,170 19.50 0.4980
2023-05-12 2023-03-31 13F COMCAST CORP CL A 20030N101 180,336 43,922 32.20 6,837 43.31 0.4427
2023-02-01 2022-12-31 13F COMCAST CORP CL A 20030N101 136,414 17,637 14.85 4,770 36.91 0.3367
2023-01-30 2022-09-30 13F/A-1 COMCAST CORP CL A 20030N101 118,777 12,722 12.00 3,484 -16.29 0.2723
2022-10-20 2022-09-30 13F COMCAST CORP CL A 20030N101 118,777 12,722 3,484 0.2723
2023-01-30 2022-06-30 13F/A-1 COMCAST CORP CL A 20030N101 106,055 1,795 1.72 4,162 -14.73 0.3292
2022-08-15 2022-06-30 13F COMCAST CORP CL A 20030N101 106,055 1,795 4,162 0.3292
2023-01-30 2022-03-31 13F/A-1 COMCAST CORP CL A 20030N101 104,260 11,088 11.90 4,881 4.09 0.3300
2022-05-04 2022-03-31 13F COMCAST CORP CL A 20030N101 104,260 11,088 4,881 0.3300
2023-01-30 2021-12-31 13F/A-1 COMCAST CORP CL A 20030N101 93,172 21,197 29.45 4,689 16.47 0.3633
2022-02-11 2021-12-31 13F COMCAST CORP CL A 20030N101 93,172 21,197 4,689 0.3633
2023-01-30 2021-09-30 13F/A-1 COMCAST CORP CL A 20030N101 71,975 39,525 121.80 4,026 117.62 0.3932
2021-11-15 2021-09-30 13F COMCAST CORP CL A 20030N101 71,975 39,525 4,026 0.3932
2023-01-30 2021-06-30 13F/A-1 COMCAST CORP CL A 20030N101 32,450 17,909 123.16 1,850 135.07 0.2198
2021-08-13 2021-06-30 13F COMCAST CORP CL A 20030N101 32,450 17,909 1,850 0.2198
2023-01-30 2021-03-31 13F/A-1 COMCAST CORP CL A 20030N101 14,541 6,471 80.19 787 86.05 0.1223
2021-05-17 2021-03-31 13F COMCAST CORP CL A 20030N101 14,541 6,471 787 0.1223
2023-01-30 2020-12-31 13F/A-1 COMCAST CORP CL A 20030N101 8,070 1,712 26.93 423 43.88 0.0843
2021-02-16 2020-12-31 13F COMCAST CORP CL A 20030N101 8,070 1,712 423 0.0843
2023-01-30 2020-09-30 13F/A-1 COMCAST CORP CL A 20030N101 6,358 6,358 294 0.0702
2020-11-16 2020-09-30 13F COMCAST CORP CL A 20030N101 6,358 6,358 294 0.0702
2020-08-17 2020-06-30 13F COMCAST CORP CL A 20030N101 0 -11,933 -100.00 0 -100.00
2020-05-14 2020-03-31 13F COMCAST CORP CL A 20030N101 11,933 66 0.56 410 -23.22 0.1058
2020-02-12 2019-12-31 13F COMCAST CORP CL A 20030N101 11,867 -439 -3.57 534 -3.61 0.1309
2019-11-13 2019-09-30 13F COMCAST CORP CL A 20030N101 12,306 1,771 16.81 554 24.49 0.1409
2019-08-14 2019-06-30 13F COMCAST CORP CL A 20030N101 10,535 10,535 445 0.1356
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.