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SW · Smurfit Westrock plc

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Market Cap
$24.26B
Shares
524.52M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Holders: 642
Total Value: $23,366,473,984
Total Shares: 505,111,857
Showing 1–100 of 657 holdings by value · page 1 of 7

Institutional Ownership Trend

8 quarters

Holder Concentration

Across 642 13F filers · Δ vs Mar 31, 2026
Top Holder
9.0%
Sep 2024 → Jun 2026 · range 9.0% – 19.0%
−0.4 pts
Top 5
34.7%
Sep 2024 → Jun 2026 · range 34.7% – 44.8%
−0.4 pts
Top 10
51.1%
Sep 2024 → Jun 2026 · range 51.1% – 58.8%
−1.0 pts
HHI
352
Sep 2024 → Jun 2026 · range 352 – 617
Broadly held−17

Quarterly Activity

vs Mar 31, 2026
New
105
Increased
271
Decreased
192
Sold Out
82
Unchanged
74
Holder count: +23
Institutional value: +22.9%
Shares held: +5.9%

Top Buyers

vs Mar 31, 2026
Institution Added Now Holds Open

Top Sellers

vs Mar 31, 2026
Institution Sold Now Holds Open

Top New Positions

vs Mar 31, 2026
Institution Acquired Value (USD) Open

Top Sold-Out Positions

vs Mar 31, 2026
Institution Previously Held Last Value (USD) Open
Showing 100 of 657
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 2005951 CUSIP G8267P108 13F (30d) 405 filings 401 filers Visit website Investor relations