CMCSA

Comcast Corp

Company with tickers: CMCSA, CCZ

CIK

1166691

CUSIP

20030N101

Shares Outstanding

3,562,784,182

13F Activity (30d)

905 filings 854 filers

Weekly off-exchange (dark pool / OTC) trading volume reported to FINRA under its OTC/ATS Transparency data. ATS volume is executed on alternating trading systems (dark pools); non-ATS OTC is other over-the-counter dealer volume. The off-exchange share is total off-exchange volume as a percentage of consolidated weekly trading volume for the same Monday–Friday week.

1M 3M 6M 1Y 5Y All

Off-Exchange Volume History

Week Start	ATS Volume	Non-ATS OTC Volume	Total Off-Exchange	% of FINRA Weekly Volume
2026-05-18	40,336,345	25,441,116	65,777,461	48.2%
2026-05-11	36,430,282	37,466,309	73,896,591	63.6%
2026-05-04	33,950,868	31,608,085	65,558,953	47.6%
2026-04-27	35,400,654	32,831,183	68,231,837	52.3%
2026-04-20	44,175,647	33,999,295	78,174,942	61.9%
2026-04-13	21,798,306	22,312,280	44,110,586	40.4%
2026-04-06	27,255,191	28,923,099	56,178,290	49.8%
2026-03-30	21,410,580	33,408,128	54,818,708	48.3%
2026-03-23	21,359,855	30,616,683	51,976,538	41.9%
2026-03-16	31,399,327	131,020,829	162,420,156	44.8%

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