RKWD

ROCKWOOD RESEARCH · A CORPORATE FILINGS WEBSITE|STRAIGHT FROM THE SOURCE · SEC EDGAR|SPONSOREDYour message on this tape — bid on the Rockwood Ad Exchange · Rockwood Ad Exchange|

Rockwood Research

CMCSA

COMCAST CORP

Cable & Other Pay Television Services · SIC 4841CIK 1166691Held by 23 tracked managersEDGAR filings ↗10-K/10-Q ↗

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25 of 25 reported changes in each tracked manager’s latest 13F vs its prior quarter (Q2 2026). Every change is listed — no cap.

ManagerActionShare change% chgEnding % of 13F bookPosition size

Greenlight Capital (DME)

Q2 2026Position history →

New+1,345,780—0.85%$0.03B

Summit Street Capital Management

Q2 2026Position history →

New+895,459—3.1%$0.02B

Capital Research Global Investors

Q2 2026Position history →

Add+26,539,350+29.6%0.40%$2.85B

Q2 2026Position history →

Add+2,794,881+2.5%1.5%$2.85B

First Eagle Investment Management

Q2 2026Position history →

Add+392,348+1.0%1.5%$0.94B

First Pacific Advisors

Q2 2026Position history →

Add+84,101+1.0%2.6%$0.21B

Q2 2026Position history →

Add+252,932+16.8%0.20%$0.04B

Yacktman Asset Management

Q2 2026Position history →

Add+3,000+0.3%0.36%$0.03B

Matrix Asset Advisors

Q2 2026Position history →

Add+87,242+9.7%2.0%$0.02B

SRS Investment Management

Q2 2026Position history →

Add+11,272+1.2%0.23%$0.02B

Q2 2026Position history →

Add+308,305+55.5%2.9%$0.02B

Hillman Capital Management

Q2 2026Position history →

Add+5,615+5.9%1.8%$<0.01B

Capital World Investors

Q2 2026Position history →

Trim(77,512,480)(42.6%)0.30%$2.57B

Oakmark Funds (Harris Associates)

Q2 2026Position history →

Trim(19,274,599)(72.9%)0.23%$0.18B

Adage Capital Management

Q2 2026Position history →

Trim(139,300)(4.8%)0.10%$0.07B

Gardner Russo & Quinn

Q2 2026Position history →

Trim(59,446)(2.6%)0.60%$0.05B

Bridgewater Associates

Q2 2026Position history →

Trim(272,263)(22.8%)0.09%$0.02B

Q2 2026Position history →

Trim(159,806)(16.6%)0.15%$0.02B

Lakewood Capital Management

Q2 2026Position history →

Trim(80,000)(16.0%)0.54%$0.01B

Eagle Capital Management

Q2 2026Position history →

Trim(37,306,965)(99.3%)0.02%$0.01B

Q2 2026Position history →

Trim(166)(0.5%)0.06%$<0.01B

Holocene Advisors

Q2 2026Position history →

Exit(1,047,065)(100.0%)exited$0.03B

Renaissance Technologies

Q2 2026Position history →

Exit(788,376)(100.0%)exited$0.02B

Soros Fund Management

Q2 2026Position history →

Exit(14,389)(100.0%)exited$<0.01B

Kahn Brothers Group

Q2 2026Position history →

Exit(7,169)(100.0%)exited$<0.01B

Changes compare each manager’s latest 13F with its prior quarter for the same CUSIP. “First observation” rows have no earlier stored filing to compare and are never counted as buys; “Split?” rows moved by a near-whole factor at an unchanged value and are treated as stock splits, not trades. Ending weight is the position after the change, not the size of the change.