$CMCSA

$21.94 -$0.12 (0.52%) Live

$CMCSA Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 3.55B shares outstanding

Who owns CMCSA?

By type of holder

Institutions 88.2% Insiders 0.0% Everyone else 11.8%

Concentration Top 10 holders own 42.4%

BlackRock, Inc. 8.8% · Vanguard Capital Management LLC 6.6%

Institutional ownership

88.2%

-0.3 pts vs last qtr

Institutional holders

1,878

-165 vs last qtr

Net shares bought

−12.0M

by institutions in Q2 2026

New / sold out

154 / 319

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Norges Bank NEW +76.5M
Arrowstreet Capital, Limited Partnership +39.9M

Biggest sellers in Q2 2026

Capital World Investors −77.5M
Eagle Capital Management LLC −37.3M

Who is planning to sell?

Notices of proposed sale, last 12 months

$2.28M

3 notices from 3 people

Shares covered

70.7K

0.00% of the company

Arranged in advance

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Cavanagh Michael J Member of immediate family of any of the foregoing $1.89M
Nakahara Asuka Director $246K

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−23.9%

−2.99% a year

Each share's claim on the business

+31.4%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$62.7B vs $10.9B

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years88% 3–5 years2% 1–3 years3% Under 1 year6%

Quarterly turnover

11.2%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting CMCSA on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	313.2M	8.81%	−1.8M (−0.6%)	≤2021	0.1%
Shares held by quarter Peak holding321.6M (Q3'25) Change over 8 quarters+10.6M Share of the company8.810% BlackRock, Inc.'s full portfolio →
VC Vanguard Capital Management LLC	232.6M	6.55%	−508.9K (−0.2%)	≤2021	0.1%
Shares held by quarter Peak holding233.2M (Q1'26) Change over 8 quarters+232.6M Share of the company6.550% Vanguard Capital Management LLC's full portfolio →

BlackRock, Inc.

313.2M

% of company

8.81%

Change vs last qtr

−1.8M (−0.6%)

Held since

≤2021

Vanguard Capital Management LLC

232.6M

% of company

6.55%

Change vs last qtr

−508.9K (−0.2%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding Comcast Corporation, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting CMCSA on Form N-PORT; together they hold 40.9% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$2.78B	113.1M	3.18%	0.12%	June 30, 2026
V5 Vanguard 500 Index Fund Vanguard Index Funds	$2.27B	92.3M	2.60%	0.14%	June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$2.78B

% of company

3.18%

% of the fund

0.12%

As of

June 30, 2026

Vanguard 500 Index Fund

Vanguard Index Funds

Position value

$2.27B

% of company

2.60%

% of the fund

0.14%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding Comcast Corporation and how much of the fund the position is.

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