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

SecuritySSD / Simpson Manufacturing Co., Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership2,446 shares
Latest Disclosed Value $ 420,039
Advisor Group Holdings, Inc. reports 30.11% increase in ownership of SSD / Simpson Manufacturing Co., Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 2,446 shares of Simpson Manufacturing Co., Inc. (US:SSD) valued at $419,783 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 1,880 shares of Simpson Manufacturing Co., Inc.. This represents a change in shares of 30.11% during the quarter. The current value of the position is $453,513 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.

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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 2,446 566 30.11 420 38.61 0.0004
2026-02-17 2025-12-31 13F SIMPSON MFG COM 829073105 1,880 -5,497 -74.52 304 -78.28 0.0004
2025-11-14 2025-09-30 13F SIMPSON MFG COM 829073105 7,377 -1,489 -16.79 1,396 1.23 0.0020
2025-09-04 2025-06-30 13F/A-1 IMPSON MFG COM 829073105 8,866 1,102 14.19 1,378 13.04 0.0025
2025-08-13 2025-06-30 13F IMPSON MFG COM 829073105 7,171 -593 1,179 0.0014
2025-05-12 2025-03-31 13F SIMPSON MFG COM 829073105 7,764 976 14.38 1,220 8.26 0.0027
2025-06-06 2024-12-31 13F/A-1 SIMPSON MFG COM 829073105 6,788 3,335 96.58 1,126 70.61 0.0025
2025-02-07 2024-12-31 13F SIMPSON MFG COM 829073105 3,302 -151 615 0.0016
2024-11-13 2024-09-30 13F SIMPSON MFG COM 829073105 3,453 -605 -14.91 661 -3.51 0.0015
2024-08-13 2024-06-30 13F SIMPSON MFG COM 829073105 4,058 -6,759 -62.48 684 -69.18 0.0016
2024-05-10 2024-03-31 13F SIMPSON MFG COM 829073105 10,817 -3,375 -23.78 2,219 -21.00 0.0050
2024-02-12 2023-12-31 13F SIMPSON MFG COM 829073105 14,192 -1,487 -9.48 2,810 19.63 0.0049
2023-11-13 2023-09-30 13F SIMPSON MFG COM 829073105 15,679 6,365 68.34 2,349 82.16 0.0035
2023-08-21 2023-06-30 13F/A-1 SIMPSON MFG COM 829073105 9,314 -351 -3.63 1,289 21.83 0.0023
2023-08-10 2023-06-30 13F SIMPSON MFG COM 829073105 9,314 -351 1,289 0.0003
2023-05-12 2023-03-31 13F SIMPSON MFG COM 829073105 9,665 -947 -8.92 1,059 12.55 0.0020
2023-02-10 2022-12-31 13F SIMPSON MFG COM 829073105 10,612 1,535 16.91 940 32.21 0.0019
2022-11-14 2022-09-30 13F SIMPSON MFG COM 829073105 9,077 -107 -1.17 711 -23.22 0.0016
2022-08-10 2022-06-30 13F SIMPSON MFG COM 829073105 9,184 1,797 24.33 926 20.10 0.0020
2022-05-04 2022-03-31 13F SIMPSON MFG COM 829073105 7,387 148 2.04 771 -23.36 0.0015
2022-02-03 2021-12-31 13F SIMPSON MFG COM 829073105 7,239 3,208 79.58 1,006 133.41 0.0019
2021-11-05 2021-09-30 13F SIMPSON MFG COM 829073105 4,031 307 8.24 431 4.61 0.0009
2021-08-02 2021-06-30 13F SIMPSON MFG COM 829073105 3,724 9 0.24 412 7.01 0.0009
2021-05-13 2021-03-31 13F SIMPSON MFG COM 829073105 3,715 1,788 92.79 385 113.89 0.0009
2021-02-10 2020-12-31 13F SIMPSON MANUFACTURING COM 829073105 1,927 366 23.45 180 20.00 0.0005
2020-11-12 2020-09-30 13F SIMPSON MANUFACTURING COM 829073105 1,561 -1,186 -43.17 150 -34.78 0.0004
2020-08-14 2020-06-30 13F SIMPSON MANUFACTURING COM 829073105 2,747 -81,406 -96.74 230 111.01 0.0008
2020-05-18 2020-03-31 13F SIMPSON MANUFACTURING COM 829073105 84,153 84,153 109 0.0004
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.