Comcast Corporation
AT ˙ WBAG ˙ US20030N1019
20,38 € ↓ -0,02 (-0,10%)
2026-06-04
DEL PRIS
SecurityAT:CMCS / Comcast Corporation
InstitutionAdvisory Research Inc
Latest Disclosed Ownership363,428 shares
Latest Disclosed Value $ 10,434,018
Advisory Research Inc ownership in CMCS / Comcast Corporation

On May 14, 2026 - Advisory Research Inc filed a 13F-HR form disclosing ownership of 363,428 shares of Comcast Corporation (AT:CMCS) valued at $9,189,277 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2024 disclosing 0 shares of Comcast Corporation. The current value of the position is $7,406,663 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)
2026-05-14 2026-03-31 13F COMCAST CORP CL A 20030N101 363,428 363,428 10,434 1.0892
2024-02-13 2023-12-31 13F Comcast COM 20030N101 0 -11,586 -100.00 0 -100.00
2023-11-13 2023-09-30 13F Comcast COM 20030N101 11,586 2,299 24.76 514 33.25 0.0713
2023-08-14 2023-06-30 13F Comcast COM 20030N101 9,287 9,287 386 0.0495
2020-08-13 2020-06-30 13F Comcast Corporation New Class COM 20030N101 0 -530,496 -100.00 0 -100.00
2020-05-12 2020-03-31 13F Comcast Corporation New Class COM 20030N101 530,496 7,387 1.41 18,238 -22.47 1.2642
2020-02-11 2019-12-31 13F Comcast Corporation New Class COM 20030N101 523,109 174,749 50.16 23,524 49.80 1.0811
2019-11-12 2019-09-30 13F Comcast Corporation New Class COM 20030N101 348,360 -12,993 -3.60 15,704 2.79 0.7561
2019-08-14 2019-06-30 13F Comcast Corporation New Class COM 20030N101 361,353 -2,120 -0.58 15,278 5.13 0.3004
2019-05-15 2019-03-31 13F Comcast Corporation New Class COM 20030N101 363,473 363,473 14,532 0.2807
2018-11-13 2018-09-30 13F Comcast Corporation New Class COM 20030N101 0 -68,909 -100.00 0 -100.00
2018-08-14 2018-06-30 13F Comcast Corporation New Class COM 20030N101 68,909 6,896 11.12 2,261 6.70 0.0362
2018-05-15 2018-03-31 13F Comcast Corporation New Class COM 20030N101 62,013 -2,147 -3.35 2,119 -17.55 0.0381
2018-02-08 2017-12-31 13F Comcast Corporation New Class CL A 20030N101 64,160 255 0.40 2,570 4.51 0.0425
2017-11-14 2017-09-30 13F Comcast Corporation New Class COM 20030N101 63,905 -5,497 -7.92 2,459 -8.96 0.0391
2017-08-22 2017-06-30 13F/A-1 Comcast Corporation New Class COM 20030N101 69,402 -6,931 -9.08 2,701 -5.86 0.0426
2017-08-14 2017-06-30 13F COMCAST CORPORATION NEW CLASS COM 20030N101 76,333 0 2,869
2017-05-15 2017-03-31 13F COMCAST CORPORATION NEW CLASS COM 20030N101 76,333 26,119 52.02 2,869 -17.25 0.0423
2017-02-13 2016-12-31 13F COMCAST CORPORATION NEW CLASS COM 20030N101 50,214 -6,391 -11.29 3,467 -7.67 0.0515
2016-11-14 2016-09-30 13F/A-1 COMCAST CORPORATION NEW CLASS COM 20030N101 56,605 -2,021 -3.45 3,755 -1.75 0.0611
2016-11-14 2016-09-30 13F COMCAST CORPORATION NEW CLASS COM 20030N101 56,605 3,755
2016-08-15 2016-06-30 13F Comcast Corporation New Class COM 20030N101 58,626 -51,913 -46.96 3,822 -43.39 0.0658
2016-05-16 2016-03-31 13F Comcast Corporation New Class COM 20030N101 110,539 -146,713 -57.03 6,752 -53.49 0.1277
2016-02-16 2015-12-31 13F Comcast Corporation New Class COM 20030N101 257,252 -10,112 -3.78 14,517 -4.54 0.2201
2015-11-13 2015-09-30 13F Comcast Corp - COM 20030N101 267,364 41,635 18.44 15,208 12.03 0.2164
2015-08-17 2015-06-30 13F/A-1 Comcast Corp - COM 20030N101 225,729 -3 -0.00 13,575 6.50 0.1541
2015-08-14 2015-06-30 13F Coherent COM 20030N101 11,068 703
2015-05-15 2015-03-31 13F Comcast Corp - COM 20030N101 225,732 -45,273 -16.71 12,747 -18.92 0.1394
2015-02-13 2014-12-31 13F Comcast Corp - COM 20030N101 271,005 -14,244 -4.99 15,721 2.48 0.1636
2014-11-06 2014-09-30 13F Comcast Corp - COM 20030N101 285,249 -6,491 -2.22 15,341 -2.04 0.1485
2014-08-14 2014-06-30 13F Comcast Corp - COM 20030N101 291,740 -6,130 -2.06 15,661 5.07 0.1453
2014-05-15 2014-03-31 13F COMCAST CORP - CLA 20030N101 297,870 -9,527 -3.10 14,905 -6.69 0.1539
2014-02-14 2013-12-31 13F COMCAST CORP CL A CLA 20030N101 307,397 -37,093 -10.77 15,974 2.78 0.1643
2013-11-14 2013-09-30 13F COMCAST CORP CL A CLA 20030N101 344,490 1,477 0.43 15,542 8.53 0.1673
2013-08-08 2013-06-30 13F COMCAST CORP CL A CLA 20030N101 343,013 343,013 14,321 0.1620
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.