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CMCSA SEC Filing News — Comcast Corporation

Latest SEC filings for Comcast Corporation (CMCSA) explained in plain English: insider buying and selling (Form 4), proposed insider sales (Form 144), material company events (8-K), and quarterly & annual reports (10-Q / 10-K). Sourced directly from SEC EDGAR.

What you’re looking at: Each item below is parsed from an actual SEC filing. Form 4 = confirmed insider transaction · Form 144 = proposed sale notice · 8-K = material event (earnings, M&A, leadership change, etc.) · 10-Q / 10-K = quarterly / annual report.
Form 8-K Material Company Update 2026-05-27

CMCSA filed 8-K — material company event

COMCAST CORP filed an 8-K with the SEC reporting a material event. Filing excerpt: XBRL Viewer

Filing: 8-K (Material Event)
Form 4 Tax / Compensation Filing 2026-05-20

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

ROBERTS BRIAN L (Director, Chairman of Board & Co-CEO) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: ROBERTS BRIAN L (Director, Chairman of Board & Co-CEO) Shares: 202,500
Form 4 Tax / Compensation Filing 2026-05-12

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

BREEN EDWARD D (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: BREEN EDWARD D (Director) Shares: 32,440
Form 10-Q Quarterly Report 2026-04-23

CMCSA filed Quarterly Report (10-Q)

COMCAST CORP filed its quarterly report with the SEC. This report includes unaudited financial statements and management discussion for the quarter.

Filing: 10-Q (Quarterly Report)
Form 8-K Material Company Update 2026-04-23

CMCSA filed 8-K — material company event

COMCAST CORP filed an 8-K with the SEC reporting a material event. Filing excerpt: XBRL Viewer

Filing: 8-K (Material Event)
Form 4 Tax / Compensation Filing 2026-04-03

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

Murdock Daniel C. (EVP & Chief Accounting Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Murdock Daniel C. (EVP & Chief Accounting Officer) Shares: 7,341
Form 4 Tax / Compensation Filing 2026-04-02

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

Smith Gordon (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Smith Gordon (Director) Shares: 1,176
Form 4 Tax / Compensation Filing 2026-04-02

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

Honickman Jeffrey A (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Honickman Jeffrey A (Director) Shares: 1,524
Form 4 Tax / Compensation Filing 2026-04-02

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

BREEN EDWARD D (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: BREEN EDWARD D (Director) Shares: 697
Form 4 Tax / Compensation Filing 2026-04-02

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

Brady Louise F. (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Brady Louise F. (Director) Shares: 1,176
Form 4 Tax / Compensation Filing 2026-04-02

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

Baltimore Thomas J Jr (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Baltimore Thomas J Jr (Director) Shares: 1,176
Form 4 Tax / Compensation Filing 2026-03-18

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

Khoury Jennifer (Chief Communications Officer) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: Khoury Jennifer (Chief Communications Officer) Shares: 21,381
Form 4 Tax / Compensation Filing 2026-03-18

CMCSA insider Form 4 filed for equity award, exercise, or tax withholding

BREEN EDWARD D (Director) filed a Form 4 covering compensation-related activity such as stock awards, option exercises, conversions, or tax withholding. These filings are usually neutral.

Filing: Form 4 (Insider Transaction) Insider: BREEN EDWARD D (Director) Shares: 30,000
Form 8-K Material Company Update 2026-03-16

CMCSA filed 8-K — material company event

COMCAST CORP filed an 8-K with the SEC reporting a material event. Filing excerpt: XBRL Viewer

Filing: 8-K (Material Event)
Form 4 Insider Selling 2026-03-06

CMCSA insider Armstrong Jason (CFO) sold 4,494 shares (~$142.6K)

Armstrong Jason, listed as CFO at COMCAST CORP, reported an open-market sale of 4,494 CMCSA shares in a Form 4 filing. This is a confirmed insider sale, not just a proposed sale notice.

Filing: Form 4 (Insider Transaction) Insider: Armstrong Jason (CFO) Shares: 4,494 Est. Value: $142.6K
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