컴캐스트 주식회사
MX ˙ BMV ˙ US20030N1019
SecurityMX:CMCSA / Comcast Corporation
InstitutionO'Brien Greene & Co. Inc
Latest Disclosed Ownership9,798 shares
Latest Disclosed Value $ 281,301
O'Brien Greene & Co. Inc reports 14.04% decrease in ownership of CMCSA / Comcast Corporation

On May 6, 2026 - O'Brien Greene & Co. Inc filed a 13F-HR form disclosing ownership of 9,798 shares of Comcast Corporation (MX:CMCSA) valued at $281,301 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 11,398 shares of Comcast Corporation. This represents a change in shares of -14.04% 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)
2026-05-06 2026-03-31 13F Comcast Corp New Cl A COM 20030N101 9,798 -1,600 -14.04 281 -17.35 0.0449
2026-02-05 2025-12-31 13F Comcast Corp New Cl A COM 20030N101 11,398 -400 -3.39 341 -8.11 0.1011
2025-11-10 2025-09-30 13F Comcast Corp New Cl A COM 20030N101 11,798 -1,548 -11.60 371 -22.27 0.1140
2025-08-06 2025-06-30 13F Comcast Corp New Cl A COM 20030N101 13,346 0 0.00 476 -3.25 0.1558
2025-05-12 2025-03-31 13F Comcast Corp New Cl A COM 20030N101 13,346 -100 -0.74 492 -2.38 0.1652
2025-02-03 2024-12-31 13F Comcast Corp New Cl A COM 20030N101 13,446 216 1.63 505 -8.70 0.1638
2024-11-15 2024-09-30 13F Comcast Corp New Cl A COM 20030N101 13,230 -283 -2.09 553 4.35 0.1721
2024-08-12 2024-06-30 13F Comcast Corp New Cl A COM 20030N101 13,513 283 2.14 529 -7.68 0.1676
2024-05-02 2024-03-31 13F Comcast Corp New Cl A COM 20030N101 13,230 0 0.00 574 -1.21 0.1886
2024-02-02 2023-12-31 13F Comcast Corp New Cl A COM 20030N101 13,230 0 0.00 580 -1.02 0.2040
2023-11-08 2023-09-30 13F COMCAST CORP NEW CL A COM 20030N101 13,230 0 0.00 587 0.2146
2023-08-15 2023-06-30 13F/A-1 COMCAST CORP NEW CL A COM 20030N101 13,230 -44 -0.33 1 0.1912
2023-07-20 2023-06-30 13F COMCAST CORP NEW CL A COM 20030N101 39,690 26,416 2 0.1923
2023-05-03 2023-03-31 13F COMCAST CORP NEW CL A COM 20030N101 13,274 0 0.00 1 0.1884
2023-02-02 2022-12-31 13F COMCAST CORP NEW CL A COM 20030N101 13,274 -27,658 -67.57 0 -100.00 0.1760
2022-11-09 2022-09-30 13F COMCAST CORP NEW CL A COM 20030N101 40,932 27,370 201.81 1,200 125.56 0.1590
2022-08-11 2022-06-30 13F COMCAST CORP NEW CL A COM 20030N101 13,562 65 0.48 532 -15.82 0.2009
2022-05-18 2022-03-31 13F COMCAST CORP NEW CL A COM 20030N101 13,497 0 0.00 632 -7.06 0.2087
2022-02-08 2021-12-31 13F COMCAST CORP NEW CL A COM 20030N101 13,497 267 2.02 680 -8.11 0.2234
2021-11-12 2021-09-30 13F COMCAST CORP NEW CL A COM 20030N101 13,230 0 0.00 740 -1.99 0.2699
2021-08-09 2021-06-30 13F COMCAST CORP NEW CL A COM 20030N101 13,230 0 0.00 755 5.45 0.2695
2021-05-12 2021-03-31 13F COMCAST CORP NEW CL A COM 20030N101 13,230 0 0.00 716 3.17 0.2837
2021-02-04 2020-12-31 13F COMCAST CORP NEW CL A COM 20030N101 13,230 0 0.00 694 13.40 0.2855
2020-11-09 2020-09-30 13F COMCAST CORP NEW CL A COM 20030N101 13,230 0 0.00 612 18.83 0.2909
2020-08-10 2020-06-30 13F COMCAST CORP NEW CL A COM 20030N101 13,230 -2,500 -15.89 515 -4.81 0.2726
2020-05-07 2020-03-31 13F COMCAST CORP NEW CL A COM 20030N101 15,730 0 0.00 541 -23.59 0.3601
2020-02-05 2019-12-31 13F COMCAST CORP NEW CL A COM 20030N101 15,730 0 0.00 708 -0.14 0.3595
2019-11-07 2019-09-30 13F COMCAST CORP NEW CL A COM 20030N101 15,730 0 0.00 709 6.62 0.3805
2019-08-21 2019-06-30 13F COMCAST CORP NEW CL A COM 20030N101 15,730 0 0.00 665 5.72 0.3486
2019-04-29 2019-03-31 13F COMCAST CORP NEW CL A COM 20030N101 15,730 0 0.00 629 17.35 0.3174
2019-02-27 2018-12-31 13F COMCAST CORP NEW CL A COM 20030N101 15,730 15,730 536 0.3194
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.