Comcast Corporation
MX ˙ BMV ˙ US20030N1019
SecurityMX:CMCSA / Comcast Corporation
InstitutionRhumbline Advisers
Latest Disclosed Ownership6,649,988 shares
Latest Disclosed Value $ 190,921,037
Rhumbline Advisers reports 3.60% decrease in ownership of CMCSA / Comcast Corporation

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 6,649,988 shares of Comcast Corporation (MX:CMCSA) valued at $190,921,037 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 6,898,198 shares of Comcast Corporation. This represents a change in shares of -3.60% 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)
2026-05-12 2026-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 6,649,988 -248,210 -3.60 190,921 -7.40 0.1633
2026-02-13 2025-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 6,898,198 -210,108 -2.96 206,187 -7.68 0.1667
2025-11-06 2025-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 7,108,306 58,490 0.83 223,343 -11.23 0.1794
2025-08-12 2025-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 7,049,816 -155,412 -2.16 251,608 -5.37 0.2155
2025-05-29 2025-03-31 13F/A-1 COMCAST CORP NEW-CL A COM 20030N101 7,205,228 -235,299 -3.16 265,873 -4.79 0.2487
2025-04-08 2025-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 7,205,228 -235,299 265,873 0.2487
2025-05-29 2024-12-31 13F/A-1 COMCAST CORP NEW-CL A COM 20030N101 7,440,527 -110,679 -1.47 279,243 -11.47 0.2498
2025-01-30 2024-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 7,440,527 -110,679 279,243 0.2498
2024-11-12 2024-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 7,551,206 -323,328 -4.11 315,414 2.29 0.2845
2024-08-01 2024-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 7,874,534 -133,936 -1.67 308,367 -11.18 0.2898
2024-05-09 2024-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,008,470 -27,668 -0.34 347,167 -1.48 0.3334
2024-02-08 2023-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,036,138 -199,624 -2.42 352,385 -3.50 0.3693
2023-11-09 2023-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,235,762 -98,983 -1.19 365,174 5.45 0.4239
2023-08-08 2023-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,334,745 -174,672 -2.05 346,309 107,449.07 0.3879
2023-05-11 2023-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,509,417 -44,672 -0.52 323 -99.89 0.3980
2023-02-14 2022-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,554,089 181,829 2.17 299,136 21.82 0.4021
2022-11-10 2022-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,372,260 196,500 2.40 245,558 -23.46 0.3658
2022-08-11 2022-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,175,760 243,885 3.07 320,817 -13.61 0.4682
2022-05-12 2022-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 7,931,875 109,962 1.41 371,370 -5.67 0.4780
2022-02-10 2021-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 7,821,913 23,037 0.30 393,677 -9.75 0.4825
2021-11-12 2021-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 7,798,876 -596,904 -7.11 436,191 -8.89 0.5903
2021-08-05 2021-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,395,780 -352,022 -4.02 478,727 1.14 0.6282
2021-05-06 2021-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,747,802 -322,506 -3.56 473,344 -0.41 0.6431
2021-02-10 2020-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 9,070,308 11,206 0.12 475,284 13.41 0.6560
2020-11-12 2020-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 9,059,102 24,860 0.28 419,074 19.00 0.6567
2020-08-13 2020-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 9,034,242 425,771 4.95 352,155 18.99 0.5881
2020-05-06 2020-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,608,471 199,115 2.37 295,959 -21.74 0.6202
2020-02-05 2019-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,409,356 4,542 0.05 378,169 -0.19 0.6325
2019-10-23 2019-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,404,814 169,013 2.05 378,889 8.81 0.6924
2019-08-14 2019-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,235,801 94,288 1.16 348,210 6.98 0.6537
2019-05-01 2019-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,141,513 -94,363 -1.15 325,498 16.07 0.6303
2019-01-31 2018-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,235,876 -4,819 -0.06 280,432 -3.90 0.6102
2018-11-07 2018-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,240,695 -113,166 -1.35 291,803 6.46 0.5636
2018-08-06 2018-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,353,861 263,895 3.26 274,090 -0.85 0.5528
2018-05-02 2018-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,089,966 -192,880 -2.33 276,434 -16.67 0.5774
2018-02-09 2017-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,282,846 130,904 1.61 331,728 5.75 0.6738
2017-11-06 2017-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,151,942 67,848 0.84 313,687 -0.30 0.6820
2017-08-02 2017-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 8,084,094 5,176 0.06 314,633 3.60 0.7182
2017-05-02 2017-03-31 13F COMCAST CORP NEW-CL A COM 20030N101 8,078,918 4,025,552 99.31 303,687 8.50 0.7094
2017-01-27 2016-12-31 13F COMCAST CORP NEW-CL A COM 20030N101 4,053,366 95,884 2.42 279,885 6.61 0.7093
2016-11-08 2016-09-30 13F COMCAST CORP NEW-CL A COM 20030N101 3,957,482 182,777 4.84 262,539 6.69 0.7234
2016-08-11 2016-06-30 13F COMCAST CORP NEW-CL A COM 20030N101 3,774,705 118,493 3.24 246,073 10.19 0.7291
2016-05-02 2016-03-31 13F COMCAST CORP COMMON ST COM 20030N101 3,656,212 113,567 3.21 223,321 11.71 0.6929
2016-02-03 2015-12-31 13F COMCAST CORP COMMON ST COM 20030N101 3,542,645 422,321 13.53 199,911 12.64 0.6433
2015-11-04 2015-09-30 13F COMCAST CORP COMMON ST COM 20030N101 3,120,324 -213,331 -6.40 177,484 -11.47 0.6038
2015-11-04 2015-09-30 13F COMCAST CORP CL A SPL COM 20030N200 450,740 253,685 25,800 0.0878
2015-08-04 2015-06-30 13F COMCAST CORP COMMON ST COM 20030N101 3,333,655 -895,723 -21.18 200,486 -16.06 0.6390
2015-08-04 2015-06-30 13F COMCAST CORP CL A SPL COM 20030N200 197,055 -4,032,323 11,811 0.0376
2015-05-12 2015-03-31 13F COMCAST CORP COMMON ST COM 20030N101 4,229,378 -72,892 -1.69 238,833 -4.30 0.6890
2015-02-06 2014-12-31 13F COMCAST CORP COMMON ST COM 20030N101 4,302,270 -108,791 -2.47 249,575 5.21 0.7250
2014-11-12 2014-09-30 13F COMCAST CORP COMMON ST COM 20030N101 4,411,061 -115,515 -2.55 237,227 -2.37 0.7126
2014-08-06 2014-06-30 13F COMCAST CORP COMMON ST COM 20030N101 4,526,576 -130,952 -2.81 242,987 4.30 0.7131
2014-05-06 2014-03-31 13F COMCAST CORP COMMON ST COM 20030N101 4,657,528 -72,105 -1.52 232,970 -5.21 0.6910
2014-05-06 2014-03-31 13F COMCAST CORP CL A SPL COM 20030N200 13,300 0 649 0.0019
2014-02-03 2013-12-31 13F COMCAST CORP COMMON ST COM 20030N101 4,729,633 -201,899 -4.09 245,775 10.38 0.7250
2014-02-03 2013-12-31 13F COMCAST CORP CL A SPL COM 20030N200 13,300 0 663 0.0020
2013-11-05 2013-09-30 13F COMCAST CORP COMMON ST COM 20030N101 4,931,532 -89,525 -1.78 222,659 5.89 0.6899
2013-11-05 2013-09-30 13F COMCAST CORP CL A SPL COM 20030N200 13,300 0 577 0.0018
2013-08-07 2013-06-30 13F COMCAST CORP COMMON ST COM 20030N101 5,021,057 5,021,057 210,282 0.6757
2013-08-07 2013-06-30 13F COMCAST CORP CL A SPL COM 20030N200 13,300 -5,007,757 528 0.0017
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.