Comcast Corporation
MX ˙ BMV ˙ US20030N1019
SecurityMX:CMCSA / Comcast Corporation
InstitutionBlume Capital Management, Inc.
Latest Disclosed Ownership359,740 shares
Latest Disclosed Value $ 10,328,136
Blume Capital Management, Inc. reports 0.11% decrease in ownership of CMCSA / Comcast Corporation

On May 1, 2026 - Blume Capital Management, Inc. filed a 13F-HR form disclosing ownership of 359,740 shares of Comcast Corporation (MX:CMCSA) valued at $10,328,136 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 360,131 shares of Comcast Corporation. This represents a change in shares of -0.11% 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)
2026-05-01 2026-03-31 13F COMCAST CORP CL A 20030N101 359,740 -391 -0.11 10,328 -4.05 1.7562
2026-02-05 2025-12-31 13F COMCAST CORP CL A 20030N101 360,131 29,786 9.02 10,764 3.71 1.9583
2025-11-06 2025-09-30 13F COMCAST CORP CL A 20030N101 330,345 33,480 11.28 10,379 -2.04 1.9722
2025-07-30 2025-06-30 13F COMCAST CORP CL A 20030N101 296,865 31,268 11.77 10,595 8.11 2.1316
2025-05-06 2025-03-31 13F COMCAST CORP CL A 20030N101 265,597 28,278 11.92 9,801 10.04 2.1929
2025-02-10 2024-12-31 13F COMCAST CORP CL A 20030N101 237,319 3,025 1.29 8,907 -8.99 1.9951
2024-10-29 2024-09-30 13F COMCAST CORP CL A 20030N101 234,294 -275 -0.12 9,786 6.54 2.1884
2024-08-05 2024-06-30 13F COMCAST CORP CL A 20030N101 234,569 15,770 7.21 9,186 -3.15 2.2144
2024-05-02 2024-03-31 13F COMCAST CORP CL A 20030N101 218,799 3,470 1.61 9,485 0.44 2.2914
2024-05-02 2023-12-31 13F/A-1 COMCAST CORP CL A 20030N101 215,329 -1,955 -0.90 9,442 -1.99 2.4683
2024-02-07 2023-12-31 13F COMCAST CORP CL A 20030N101 215,329 -1,955 9,442 2.4683
2024-05-02 2023-09-30 13F/A-1 COMCAST CORP CL A 20030N101 217,284 -24,699 -10.21 9,634 -4.18 2.8511
2023-11-03 2023-09-30 13F COMCAST CORP CL A 20030N101 217,284 -24,699 9,634 2.8511
2024-05-02 2023-06-30 13F/A-1 COMCAST CORP CL A 20030N101 241,983 1,355 0.56 10,054 10.22 2.9430
2023-08-10 2023-06-30 13F COMCAST CORP CL A 20030N101 241,983 1,355 10,054 2.9430
2024-05-02 2023-03-31 13F/A-1 Comcast CL A 20030N101 240,628 55,828 30.21 9,122 41.16 2.8902
2023-05-08 2023-03-31 13F Comcast CL A 20030N101 240,628 55,828 9,122 2.8902
2023-02-08 2022-12-31 13F Comcast CL A 20030N101 184,800 -66,885 -26.57 6,462 -12.46 2.1825
2022-11-15 2022-09-30 13F COMCAST CORP CL A 20030N101 251,685 24,865 10.96 7,382 -17.06 2.7803
2022-08-11 2022-06-30 13F COMCAST CORP CL A 20030N101 226,820 6,701 3.04 8,900 -13.64 3.5153
2022-05-12 2022-03-31 13F Comcast CL A 20030N101 220,119 26,387 13.62 10,306 5.69 3.3988
2022-02-07 2021-12-31 13F Comcast CL A 20030N101 193,732 10,770 5.89 9,751 -4.71 3.2185
2021-11-12 2021-09-30 13F Comcast CL A 20030N101 182,962 -10,065 -5.21 10,233 -7.02 3.7431
2021-08-10 2021-06-30 13F Comcast CL A 20030N101 193,027 2,105 1.10 11,006 6.53 4.0256
2021-05-10 2021-03-31 13F Comcast CL A 20030N101 190,922 2,350 1.25 10,331 4.55 4.0672
2021-02-09 2020-12-31 13F Comcast CL A 20030N101 188,572 -112 -0.06 9,881 13.20 4.2272
2020-11-12 2020-09-30 13F Comcast CL A 20030N101 188,684 700 0.37 8,729 19.12 4.4270
2020-08-06 2020-06-30 13F Comcast CL A 20030N101 187,984 400 0.21 7,328 13.63 4.0605
2020-05-07 2020-03-31 13F Comcast CL A 20030N101 187,584 12,650 7.23 6,449 -18.01 4.1302
2020-02-05 2019-12-31 13F Comcast CL A 20030N101 174,934 -15,723 -8.25 7,866 -8.47 3.8488
2019-11-12 2019-09-30 13F Comcast CL A 20030N101 190,657 -8,487 -4.26 8,594 2.07 4.2921
2019-07-29 2019-06-30 13F Comcast CL A 20030N101 199,144 -9,725 -4.66 8,420 0.83 4.2631
2019-05-06 2019-03-31 13F Comcast CL A 20030N101 208,869 -7,529 -3.48 8,351 13.34 4.3841
2019-02-05 2018-12-31 13F Comcast CL A 20030N101 216,398 -2,630 -1.20 7,368 -5.00 4.2071
2018-11-02 2018-09-30 13F Comcast CL A 20030N101 219,028 -1,700 -0.77 7,756 7.10 4.0522
2018-08-02 2018-06-30 13F Comcast CL A 20030N101 220,728 17,605 8.67 7,242 4.35 3.9504
2018-05-04 2018-03-31 13F Comcast CL A 20030N101 203,123 30,436 17.62 6,940 0.35 3.8599
2018-02-09 2017-12-31 13F Comcast CL A 20030N101 172,687 5,825 3.49 6,916 7.71 3.5403
2018-02-14 2017-09-30 13F/A-1 Comcast CL A 20030N101 166,862 4,800 2.96 6,421 1.81 3.3960
2017-11-13 2017-09-30 13F Comcast CL A 20030N101 166,862 4,800 6,421
2017-08-08 2017-06-30 13F Comcast CL A 20030N101 162,062 -1,600 -0.98 6,307 2.52 3.5814
2017-05-12 2017-03-31 13F Comcast CL A 20030N101 163,662 80,306 96.34 6,152 6.88 3.5606
2017-01-30 2016-12-31 13F Comcast CL A 20030N101 83,356 5,525 7.10 5,756 11.49 3.4591
2016-11-07 2016-09-30 13F Comcast CL A 20030N101 77,831 -7,200 -8.47 5,163 -6.86 3.1629
2016-08-11 2016-06-30 13F/A-1 Comcast CL A 20030N101 85,031 575 0.68 5,543 7.44 3.6566
2016-08-04 2016-06-30 13F Comcast CL A 20030N101 54,734 5,543
2016-05-12 2016-03-31 13F Comcast CL A 20030N101 84,456 3,100 3.81 5,159 12.37 3.5628
2016-05-26 2015-12-31 13F/A-1 Comcast CL A 20030N101 81,356 80,756 13,459.33 4,591 13,402.94 3.2461
2016-02-08 2015-12-31 13F COMCAST CORP CL A 20030N101 81,856 4,619
2015-11-05 2015-09-30 13F COMCAST CORP CL A SPL 20030N200 600 0 0.00 34 -5.56 0.0276
2015-11-05 2015-09-30 13F COMCAST CORP CL A 20030N101 82,182 10,710 4,675 3.7921
2015-08-11 2015-06-30 13F COMCAST CORP CL A SPL 20030N200 600 0 0.00 36 5.88 0.0272
2015-08-11 2015-06-30 13F COMCAST CORP CL A 20030N101 71,472 900 4,298 3.2516
2015-05-05 2015-03-31 13F COMCAST CORP CL A SPL 20030N200 600 0 0.00 34 -2.86 0.0236
2015-05-05 2015-03-31 13F COMCAST CORP CL A 20030N101 70,572 -978 3,985 2.7632
2015-02-10 2014-12-31 13F COMCAST CORP CL A SPL 20030N200 600 0 0.00 35 9.38 0.0247
2015-02-10 2014-12-31 13F COMCAST CORP CL A 20030N101 71,550 1,465 4,151 2.9260
2014-11-12 2014-09-30 13F COMCAST CORP CL A SPL 20030N200 600 0 0.00 32 0.00 0.0249
2014-11-12 2014-09-30 13F COMCAST CORP CL A 20030N101 70,085 -225 3,769 2.9329
2014-07-29 2014-06-30 13F COMCAST CORP CL A SPL 20030N200 600 0 0.00 32 10.34 0.0251
2014-07-29 2014-06-30 13F COMCAST CORP CL A 20030N101 70,310 501 3,774 2.9627
2014-05-13 2014-03-31 13F COMCAST CORP CL A SPL 20030N200 600 0 0.00 29 -3.33 0.0230
2014-05-13 2014-03-31 13F COMCAST CORP CL A 20030N101 69,809 -5,050 3,493 2.7731
2014-02-14 2013-12-31 13F COMCAST CORP CL A SPL 20030N200 600 600 30 0.0248
2014-02-14 2013-12-31 13F COMCAST CORP CL A 20030N101 74,859 74,259 3,890 3.2175
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.