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 Mar 31, 2025
Ownership Breakdown
2,448
Institutional Holders
▼ 92 vs Q4
$116.71B
Total Inst. Value
▼ $3.44B vs Q4
3.57B
Shares Outstanding
freeFloat 98.95%
3.16B
13F Shares Held
▼ 39.12M vs Q4
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
Q1 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
VANGUARD GROUP INC cable & other pay television services | 368.18M | 9.83% | 9.83% | $13.59T | May 9, 2025 | ▼ 1.35M |
BLACKROCK, INC. cable & other pay television services | 309.90M | 8.28% | 8.28% | $11.44T | May 2, 2025 | ▲ 8.37M |
STATE STREET CORP cable & other pay television services | 168.54M | 4.50% | 4.50% | $6.22T | May 15, 2025 | ▲ 805.9K |
CAPITAL WORLD INVESTORS cable & other pay television services | 147.86M | 3.95% | 3.95% | $5.46T | May 12, 2025 | ▲ 6.18M |
FMR LLC cable & other pay television services | 115.59M | 3.09% | 3.09% | $4.27T | May 12, 2025 | ▼ 1.36M |
NORGES BANK cable & other pay television services | 110.00M | 2.94% | 2.94% | $4.06T | May 11, 2026 | ▲ 7.81M |
JPMORGAN CHASE & CO cable & other pay television services | 94.26M | 2.52% | 2.52% | $3.48T | May 12, 2025 | ▲ 12.37M |
DODGE & COX cable & other pay television services | 94.22M | 2.52% | 2.52% | $3.48T | May 14, 2025 | ▲ 15.12M |
GEODE CAPITAL MANAGEMENT, LLC cable & other pay television services | 87.27M | 2.33% | 2.33% | $3.21T | May 13, 2025 | ▲ 1.45M |
MORGAN STANLEY cable & other pay television services | 48.99M | 1.31% | 1.31% | $1.81T | May 15, 2025 | ▼ 6.39M |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q1 2025 vs prior quarter
Q1 2025
29
Increased
+97.54M shares1
New Positions
first time holders20
Decreased
−112.78M shares0
Sold Out
fully exitedNet shares change (top 50)
15.23M
+97.54M / −112.78M
Net new holders
+10
1 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 88.6% of total shares outstanding. Company insiders own approximately 1.05%, while retail and public investors account for the remaining 10.35%.
The largest institutional shareholder of Comcast Corporation is VANGUARD GROUP INC, holding approximately 368.18 million shares — equal to 9.83% of outstanding shares — as of March 31, 2025.
A total of 2,448 institutional investors currently hold CMCSA stock, with a combined institutional value of approximately $116.71 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 88.6% of shares. The largest shareholder is VANGUARD GROUP INC with a 9.83% stake. Company insiders hold 1.05%. Data sourced from SEC Form 13F as of March 31, 2025.