Simpson Manufacturing Co., Inc.
US ˙ NYSE ˙ US8290731053

SecuritySSD / Simpson Manufacturing Co., Inc.
InstitutionAmundi
Latest Disclosed Ownership3,679 shares
Latest Disclosed Value $ 631,390
Amundi reports 124.06% increase in ownership of SSD / Simpson Manufacturing Co., Inc.

On May 15, 2026 - Amundi filed a 13F-HR form disclosing ownership of 3,679 shares of Simpson Manufacturing Co., Inc. (US:SSD) valued at $631,390 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,642 shares of Simpson Manufacturing Co., Inc.. This represents a change in shares of 124.06% during the quarter. The current value of the position is $692,388 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

Upgrade to unlock premium data and export to Excel .

Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date
Effective
Date
Form Security Class ID Avg Price
Paid (Est)
Reported
Shares
ΔShares ΔShares
(%)
Reported
Value
(x1000)
ΔValue
(%)
Alloc
(%)
ΔAlloc ΔAlloc (%) Cost Basis
(x1000)
Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F SIMPSON MFG COM 829073105 3,679 2,037 124.06 631 138.11 0.0001
2026-02-17 2025-12-31 13F SIMPSON MFG COM 829073105 1,642 1,642 265 0.0001
2025-08-13 2025-06-30 13F SIMPSON MANUFACTURING COM 829073105 0 -52,845 -100.00 0 -100.00
2025-05-15 2025-03-31 13F SIMPSON MANUFACTURING COM 829073105 52,845 -6,800 -11.40 7,669 -19.17 0.0028
2025-02-07 2024-12-31 13F SIMPSON MANUFACTURING COM 829073105 59,645 -467 -0.78 9,488 -18.49 0.0033
2024-11-13 2024-09-30 13F SIMPSON MANUFACTURING COM 829073105 60,112 60,112 11,641 0.0043
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.