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Comcast Corporation (CMCSA) SEC Filing (8-K) 2021

Browse all Comcast Corporation SEC filings, including Annual reports (10-K), Quarterly reports (10-Q), 8-K, proxy statements (DEF 14A), and insider filings (Form 4). Access official documents by filing date, reporting period, and form type. ...more

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Last updated: March 17, 2026, 5:32 AM ET

SEC Filings

Date

2021

8-K

Material company events (earnings, M&A, or leadership changes)

Aug 19, 2021 05:04 PM

2026

424B3

Updated prospectus reflecting new or changed information

Aug 7, 2026 04:16 PM

EFFECT

Notice that a registration statement has become effective

Aug 10, 2026 12:15 AM

4

Insider ownership (buying, selling) activity

Aug 6, 2026 05:12 PM

S-4

Share registration related to mergers or acquisitions

Jul 30, 2026 04:05 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Jul 23, 2026 06:06 AM

10-Q

Quarterly financial results and management updates

Jul 23, 2026 03:11 PM

4

Insider ownership (buying, selling) activity

Jul 2, 2026 04:12 PM

4

Insider ownership (buying, selling) activity

Jul 2, 2026 04:10 PM

4

Insider ownership (buying, selling) activity

Jul 2, 2026 04:12 PM

4

Insider ownership (buying, selling) activity

Jul 2, 2026 04:12 PM

4

Insider ownership (buying, selling) activity

Jul 2, 2026 04:15 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Jun 29, 2026 09:03 AM

8-K

Material company events (earnings, M&A, or leadership changes)

Jun 12, 2026 04:11 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Jun 3, 2026 08:40 AM

8-K

Material company events (earnings, M&A, or leadership changes)

Jun 2, 2026 04:23 PM

8-K

Material company events (earnings, M&A, or leadership changes)

May 27, 2026 08:55 AM

SD

Specialized disclosure report (e.g., conflict minerals)

May 22, 2026 10:05 AM

4

Insider ownership (buying, selling) activity

May 20, 2026 04:19 PM

SC 13G

Passive large shareholder ownership disclosure

May 14, 2026 01:55 PM

4

Insider ownership (buying, selling) activity

May 12, 2026 04:03 PM

SC 13G

Passive large shareholder ownership disclosure

Apr 29, 2026 05:52 PM

DEF 14A

Final shareholder voting details (board elections and executive pay)

Apr 24, 2026 04:05 PM

DEFA14A

Additional or supplemental proxy disclosures

Apr 24, 2026 04:10 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Apr 23, 2026 07:08 AM

10-Q

Quarterly financial results and management updates

Apr 23, 2026 03:10 PM

4

Insider ownership (buying, selling) activity

Apr 3, 2026 01:33 PM

4

Insider ownership (buying, selling) activity

Apr 2, 2026 04:27 PM

4

Insider ownership (buying, selling) activity

Apr 2, 2026 04:26 PM

4

Insider ownership (buying, selling) activity

Apr 2, 2026 04:25 PM

4

Insider ownership (buying, selling) activity

Apr 2, 2026 04:24 PM

4

Insider ownership (buying, selling) activity

Apr 2, 2026 04:23 PM

SC 13G/A

Updated passive ownership disclosure

Mar 26, 2026 05:40 PM

4

Insider ownership (buying, selling) activity

Mar 18, 2026 04:23 PM

4

Insider ownership (buying, selling) activity

Mar 18, 2026 04:24 PM

8-K

Material company events (earnings, M&A, or leadership changes)

Mar 16, 2026 09:36 AM

4

Insider ownership (buying, selling) activity

Mar 6, 2026 04:03 PM

4

Insider ownership (buying, selling) activity

Mar 3, 2026 04:13 PM

4

Insider ownership (buying, selling) activity

Mar 3, 2026 04:14 PM

4

Insider ownership (buying, selling) activity

Mar 3, 2026 04:15 PM

4

Insider ownership (buying, selling) activity

Mar 3, 2026 04:17 PM

Comcast Corporation (Form 8-K) 2021

Current Events / Material company events (earnings, M&A, or leadership changes)

Aug 19, 2021 05:04 PM

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