Smurfit Westrock Plc
Held by 3 superinvestors (SW).
Educational data only — not investment advice. 13F positions are self-reported and can lag up to 45 days.
Ownership · 13F consensus
Who's buying it
Institutional ownership aggregated across funds — consensus strength and this quarter's moves. Describes actions, not advice.
3 superinvestors hold it · $686.9M combined
Largest holder Sarah Ketterer
Held by 3 superinvestors of Smurfit Westrock Plc (SW); this quarter 1 opened, 1 added, 1 trimmed (as of 2026-03-31).
13F positions are self-reported and can lag up to 45 days. Informational only — not investment advice.
Superinvestors Holding This Security
- Value$620.3MWeight (prev→now)10.2% → 7.6% ▼
- Value$60.1MWeight (prev→now)New · 2.0%
- Value$6.4MWeight (prev→now)1.4% → 1.5% ▲
Ownership overview
Smurfit Westrock Plc (SW) is held by 3 of the superinvestors tracked on Compounder, with a combined $686.9M in reported 13F value. The largest position belongs to Sarah Ketterer, where it makes up 7.6% of the portfolio.
Other notable holders by value include Harry Burn (2.0% of its book) and Arnold Van Den Berg (1.5% of its book).
Over the latest quarter, 1 of the tracked filers opened a new position in SW, 1 added to existing ones, 1 trimmed, and 0 sold out entirely.
Holder counts and values reflect the most recent SEC Form 13F filings, through the quarter ended 2026-03-31. Source: SEC EDGAR. A 13F shows only long US-listed positions and can lag the real portfolio by up to 45 days, so this is disclosed long ownership, not a complete picture.
Holders over time
Superinvestors holding this security over the last 7 quarters: 4 → 3.
Early quarters may understate holder counts due to data backfill — read the slope with care.
Sources· SEC EDGAR 13F as of 2026-05-15
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