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SSD · Simpson Manufacturing Co., Inc.

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Market Cap
$7.30B
Shares
40.98M

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: 488
Total Value: $8,600,128,058
Total Shares: 41,114,617
Showing 1–100 of 496 holdings by value · page 1 of 5

Institutional Ownership Trend

26 quarters

Holder Concentration

Across 488 13F filers · Δ vs Mar 31, 2026
Top Holder
10.0%
Sep 2023 → Jun 2026 · range 9.6% – 13.2%
+0.2 pts
Top 5
36.8%
Sep 2023 → Jun 2026 · range 35.0% – 44.7%
+1.8 pts
Top 10
49.4%
Sep 2023 → Jun 2026 · range 49.1% – 59.2%
+0.4 pts
HHI
373
Sep 2023 → Jun 2026 · range 356 – 543
Broadly held+17

Quarterly Activity

vs Mar 31, 2026
New
76
Increased
150
Decreased
183
Sold Out
50
Unchanged
79
Holder count: +26
Institutional value: +22.3%
Shares held: +0.4%

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 496
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 920371 CUSIP 829073105 13F (30d) 310 filings 303 filers Visit website Investor relations