Comcast Corporation
Comcast Corporation (CMCSA) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CMCSA · as of Sep 30, 2025
Ownership Breakdown
2,235
Institutional Holders
▼ 143 vs Q2
$93.38B
Total Inst. Value
▼ $17.89B vs Q2
3.57B
Shares Outstanding
freeFloat 98.95%
2.97B
13F Shares Held
▼ 145.88M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CMCSA largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC cable & other pay television services | 367.15M | 9.78% | 9.78% | $11.54T | Nov 7, 2025 | ▼ 2.29M |
BLACKROCK, INC. cable & other pay television services | 321.62M | 8.56% | 8.56% | $10.11T | Nov 12, 2025 | ▲ 19.58M |
STATE STREET CORP cable & other pay television services | 180.69M | 4.81% | 4.81% | $5.68T | Nov 14, 2025 | ▲ 7.92M |
CAPITAL WORLD INVESTORS cable & other pay television services | 116.18M | 3.09% | 3.09% | $3.65T | Nov 13, 2025 | ▼ 12.64M |
DODGE & COX cable & other pay television services | 112.57M | 3.00% | 3.00% | $3.54T | Nov 13, 2025 | ▲ 1.30M |
FMR LLC cable & other pay television services | 96.38M | 2.57% | 2.57% | $3.03T | Nov 13, 2025 | ▼ 9.31M |
GEODE CAPITAL MANAGEMENT, LLC cable & other pay television services | 88.45M | 2.35% | 2.35% | $2.77T | Nov 12, 2025 | ▲ 1.48M |
JPMORGAN CHASE & CO cable & other pay television services | 84.34M | 2.25% | 2.25% | $2.65T | Nov 26, 2025 | ▼ 20.84M |
MORGAN STANLEY cable & other pay television services | 45.46M | 1.21% | 1.21% | $1.43T | May 27, 2026 | ▼ 2.51M |
EAGLE CAPITAL MANAGEMENT LLC cable & other pay television services | 42.54M | 1.13% | 1.13% | $1.34T | Nov 14, 2025 | ▼ 2.2K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
22
Increased
+74.35M shares0
New Positions
first time holders28
Decreased
−102.39M shares0
Sold Out
fully exitedNet shares change (top 50)
28.04M
+74.35M / −102.39M
Net new holders
-6
0 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CMCSA insider trading · insider activity
Source: SEC Form 4
Insiders have been primarily selling shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
2
Buy transactions
3
Sell transactions
0.67
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
ROBERTS BRIAN L Chairman of Board & Co-CEO | May 19, 2026 | Gift | 202,500 | — | — | 5.70M | Form 4 ↗ |
BREEN EDWARD D director | May 11, 2026 | Gift | 32,440 | — | — | 89.0K | Form 4 ↗ |
Murdock Daniel C. EVP & Chief Accounting Officer | Apr 3, 2026 | Tax Withhold | 2,073 | $27.93 | $57.9K | 62.4K | Form 4 ↗ |
Smith Gordon director | Mar 31, 2026 | Award | 1,176 | — | — | 9.0K | Form 4 ↗ |
Honickman Jeffrey A director | Mar 31, 2026 | Award | 1,524 | — | — | 262.6K | Form 4 ↗ |
BREEN EDWARD D director | Mar 31, 2026 | Award | 697 | — | — | 56.5K | Form 4 ↗ |
Brady Louise F. director | Mar 31, 2026 | Award | 1,176 | — | — | 32.7K | Form 4 ↗ |
Baltimore Thomas J Jr director | Mar 31, 2026 | Award | 1,176 | — | — | 39.0K | Form 4 ↗ |
Khoury Jennifer Chief Communications Officer | Mar 17, 2026 | Tax Withhold | 10,514 | $30.08 | $316.3K | 60.5K | Form 4 ↗ |
BREEN EDWARD D director | Mar 17, 2026 | Gift | 30,000 | — | — | 55.8K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Comcast Corporation (CMCSA) is primarily owned by institutional investors, who hold approximately 83.2% of total shares outstanding. Company insiders own approximately 1.05%, while retail and public investors account for the remaining 15.73%.
The largest institutional shareholder of Comcast Corporation is VANGUARD GROUP INC, holding approximately 367.15 million shares — equal to 9.78% of outstanding shares — as of September 30, 2025.
A total of 2,235 institutional investors currently hold CMCSA stock, with a combined institutional value of approximately $93.38 billion as of the most recent 13F filing period.
Frequently asked questions
CMCSA ownershipComcast Corporation (CMCSA) is primarily owned by institutional investors, who hold approximately 83.2% of shares. The largest shareholder is VANGUARD GROUP INC with a 9.78% stake. Company insiders hold 1.05%. Data sourced from SEC Form 13F as of September 30, 2025.