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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

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Smurfit Westrock plc

Paperboard Containers & Boxes · SIC 2650CIK 2005951Held by 13 tracked managersEDGAR filings ↗10-K/10-Q ↗

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13 of 13 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

Bridgewater Associates

Q2 2026Position history →

New+471,953—0.09%$0.02B

Capital Research Global Investors

Q2 2026Position history →

Add+3,662,577+9.4%0.28%$1.97B

Capital World Investors

Q2 2026Position history →

Add+3,000,000+24.1%0.08%$0.72B

Sound Shore Management

Q2 2026Position history →

Add+326,681+21.6%2.6%$0.08B

Lakewood Capital Management

Q2 2026Position history →

Add+52,000+7.7%1.7%$0.03B

Fuller & Thaler Asset Management

Q2 2026Position history →

Add+1,223+0.5%0.03%$0.01B

Causeway Capital Management

Q2 2026Position history →

Trim(526,987)(3.4%)7.5%$0.70B

Orbis Investment Management

Q2 2026Position history →

Trim(7,893,567)(57.3%)0.94%$0.27B

Soros Fund Management

Q2 2026Position history →

Trim(1,007,438)(40.0%)0.92%$0.07B

Q2 2026Position history →

Trim(11,511)(1.7%)0.14%$0.03B

Lansdowne Partners (UK)

Q2 2026Position history →

Trim(1,522,424)(81.4%)0.66%$0.02B

Century Management

Q2 2026Position history →

Trim(4,074)(2.5%)1.5%$0.01B

Adage Capital Management

Q2 2026Position history →

Trim(23,700)(16.8%)0.01%$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.