Signal dossier · Q4 2025

CMCSA

Comcast · Communication

HoldLens verdict · single −100..+100 scale

SELL

−2

on a signed −100 sell scale · WEAK SELL

0 tracked manager selling. MODERATE sell signal.

Unified ConvictionScore · −100..+100

Smart money + insider + track record + trend + concentration + contrarian − dissent − crowding

−2

Buy component

+-1

Dissent penalty

−1

Unanimity bonus

Quality differential

Info density

Buyers / Sellers

2 / 0

ConvictionScore v5 · 9-layer breakdown

13F superinvestor moves + Form 4 insider trades + 8-K material events. The SEC Signals trilogy.

−2

Smart money (13F)

Insider activity (Form 4)

Track record (CAGR)

-5

Trend streak

Concentration

Contrarian bonus

Event signal (8-K)

− Dissent penalty

−1

− Crowding penalty

−0

Owners: 1·Buyers: 8·Sellers: 2·Buyer-CAGR-weighted expected return: +9.4% ±0.6%·How this is computed

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Ownership breadth · 8 quarters

Breadth flat

+0 owners over 8Q

Q1 '24

Q2 '24

Q3 '24

Q4 '24

Q1 '25

Q2 '25

Q3 '25

Q4 '25

The number of superinvestors holding this name has been stable for 8 quarters. See the most-owned names across all tracked managers →

Smart money activity

Every tracked 13F move on CMCSA — grouped by quarter, ranked by manager quality.

Smart money activity

8 buys · 2 sells across tracked 13F filings

Net signal: STRONG BUY

Q4 2025(2 moves)

Portfolio manager	Activity	Share change	% portfolio
Joel GreenblattElite Gotham Asset Management	Add 50.00%	+3.59M	0.20%
Bill Nygren Oakmark Funds	Add 24.00%	+5.40M	1.00%

Q2 2025(1 move)

Portfolio manager	Activity	Share change	% portfolio
Joel GreenblattElite Gotham Asset Management	Reduce 50.00%	-7.37M	0.20%

Q1 2025(2 moves)

Portfolio manager	Activity	Share change	% portfolio
Joel GreenblattElite Gotham Asset Management	Add 19.00%	+2.35M	0.60%
Andreas HalvorsenElite Viking Global Investors	Sell (exit)	-19.82M	0.00%

Q4 2024(2 moves)

Portfolio manager	Activity	Share change	% portfolio
Andreas HalvorsenElite Viking Global Investors	Add 541%	+16.73M	2.40%
Joel GreenblattElite Gotham Asset Management	Add 26.00%	+2.59M	0.60%

Q3 2024(2 moves)

Portfolio manager	Activity	Share change	% portfolio
Andreas HalvorsenElite Viking Global Investors	Buy (new)	+3.09M	0.50%
Joel GreenblattElite Gotham Asset Management	Add 12.00%	+1.06M	0.60%

Q2 2024(1 move)

Portfolio manager	Activity	Share change	% portfolio
Joel GreenblattElite Gotham Asset Management	Add 92.00%	+4.18M	0.50%

Insider activity

What the company's own executives and directors are doing — buys are highly bullish.

Latest news

Recent headlines for CMCSA — context for the moves above.

Who’s betting biggest on CMCSA

Communication sector →

Each bar is one manager’s position size in CMCSA as a % of their portfolio. Longer bar = bigger conviction bet. T1 badge marks the highest-quality track records.

Bill Nygren

3.8%

“Cable + content, dividend payer.”

AI thesis

An AI-synthesised investment thesis for CMCSA, based on the 13F data above. Generated on demand — not stored or pre-computed.

AI thesis

Claude Haiku synthesis of SELL positioning from 1 institutional filers

Generate a 2-paragraph investment thesis synthesising 1 institutional holdings and the -2 conviction score.

Related smart-money signals

Derived from the same 13F filings

Same sector · Communication

Top conviction in this sector

All Communication names →

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The HoldLens signal dossier shows the unified −100..+100 ConvictionScore alongside live prices, multi-quarter trend detection, insider activity, and real-time news. Not investment advice. Methodology.