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

SecuritySSD / Simpson Manufacturing Co., Inc.
InstitutionAmalgamated Bank
Latest Disclosed Ownership18,879 shares
Latest Disclosed Value $ 3,240
Amalgamated Bank reports 1.30% increase in ownership of SSD / Simpson Manufacturing Co., Inc.

On May 8, 2026 - Amalgamated Bank filed a 13F-HR form disclosing ownership of 18,879 shares of Simpson Manufacturing Co., Inc. (US:SSD) valued at $3,240,014 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 5, 2026 disclosing 18,636 shares of Simpson Manufacturing Co., Inc.. This represents a change in shares of 1.30% during the quarter. The current value of the position is $3,500,355 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)
2026-05-08 2026-03-31 13F SIMPSON MANUFACTURING COM 829073105 18,879 243 1.30 3 0.00 0.0248
2026-02-05 2025-12-31 13F SIMPSON MANUFACTURING COM 829073105 18,636 -575 -2.99 3 0.00 0.0217
2025-10-29 2025-09-30 13F SIMPSON MANUFACTURING COM 829073105 19,211 -114 -0.59 3 0.00 0.0230
2025-08-04 2025-06-30 13F SIMPSON MANUFACTURING COM 829073105 19,325 -73 -0.38 3 0.00 0.0232
2025-04-25 2025-03-31 13F SIMPSON MANUFACTURING COM 829073105 19,398 -754 -3.74 3 0.00 0.0261
2025-02-04 2024-12-31 13F SIMPSON MANUFACTURING COM 829073105 20,152 -784 -3.74 3 -25.00 0.0274
2024-10-30 2024-09-30 13F SIMPSON MANUFACTURING COM 829073105 20,936 -3,315 -13.67 4 0.00 0.0330
2024-08-12 2024-06-30 13F SIMPSON MANUFACTURING COM 829073105 24,251 1,870 8.36 4 0.00 0.0348
2024-04-23 2024-03-31 13F SIMPSON MANUFACTURING COM 829073105 22,381 -4,469 -16.64 5 -20.00 0.0393
2024-02-06 2023-12-31 13F SIMPSON MANUFACTURING COM 829073105 26,850 -432 -1.58 5 25.00 0.0424
2023-11-08 2023-09-30 13F SIMPSON MANUFACTURING COM 829073105 27,282 -658 -2.36 4 33.33 0.0348
2023-08-11 2023-06-30 13F SIMPSON MANUFACTURING COM 829073105 27,940 -591 -2.07 4 0.00 0.0313
2023-05-02 2023-03-31 13F SIMPSON MANUFACTURING COM 829073105 28,531 -1,614 -5.35 3 50.00 0.0267
2023-02-10 2022-12-31 13F SIMPSON MANUFACTURING COM 829073105 30,145 80 0.27 3 -99.92 0.0238
2022-11-09 2022-09-30 13F SIMPSON MANUFACTURING COM 829073105 30,065 735 2.51 2,357 -20.13 0.0228
2022-08-15 2022-06-30 13F SIMPSON MANUFACTURING COM 829073105 29,330 -218 -0.74 2,951 -8.41 0.0275
2022-08-25 2022-03-31 13F/A-1 SIMPSON MANUFACTURING COM 829073105 29,548 -1,418 -4.58 3,222 -25.17 0.0250
2022-06-30 2022-03-31 13F SIMPSON MANUFACTURING COM 829073105 29,548 -1,418 3,222 0.0256
2022-02-15 2021-12-31 13F/A-1 SIMPSON MANUFACTURING COM 829073105 30,966 116 0.38 4,306 30.48 0.0318
2022-02-15 2021-12-31 13F SIMPSON MANUFACTURING COM 829073105 30,966 116 4,306 0.0318
2021-10-29 2021-09-30 13F SIMPSON MANUFACTURING COM 829073105 30,850 -3,259 -9.55 3,300 -12.40 0.0279
2021-08-16 2021-06-30 13F SIMPSON MANUFACTURING COM 829073105 34,109 27,530 418.45 3,767 452.35 0.0302
2021-05-13 2021-03-31 13F SIMPSON MANUFACTURING COM 829073105 6,579 -612 -8.51 682 1.49 0.0256
2021-02-12 2020-12-31 13F SIMPSON MANUFACTURING COM 829073105 7,191 67 0.94 672 -2.89 0.0255
2020-10-30 2020-09-30 13F SIMPSON MANUFACTURING COM 829073105 7,124 -207 -2.82 692 11.97 0.0301
2020-08-10 2020-06-30 13F SIMPSON MANUFACTURING COM 829073105 7,331 -1,072 -12.76 618 18.62 0.0286
2020-05-13 2020-03-31 13F SIMPSON MANUFACTURING COM 829073105 8,403 -320 -3.67 521 -25.57 0.0127
2020-02-13 2019-12-31 13F SIMPSON MANUFACTURING COM 829073105 8,723 452 5.46 700 21.95 0.0129
2019-11-13 2019-09-30 13F SIMPSON MANUFACTURING COM 829073105 8,271 -142 -1.69 574 2.68 0.0121
2019-08-14 2019-06-30 13F SIMPSON MANUFACTURING COM 829073105 8,413 1,746 26.19 559 41.52 0.0130
2019-05-15 2019-03-31 13F SIMPSON MANUFACTURING COM 829073105 6,667 152 2.33 395 11.90 0.0096
2019-02-15 2018-12-31 13F SIMPSON MANUFACTURING COM 829073105 6,515 3,649 127.32 353 69.71 0.0100
2018-11-14 2018-09-30 13F SIMPSON MANUFACTURING COM 829073105 2,866 -3,910 -57.70 208 -50.59 0.0051
2018-07-18 2018-06-30 13F SIMPSON MANUFACTURING COM 829073105 6,776 900 15.32 421 24.56 0.0103
2018-05-22 2018-03-31 13F SIMPSON MANUFACTURING COM 829073105 5,876 -96 -1.61 338 -1.46 0.0090
2018-02-13 2017-12-31 13F SIMPSON MANUFACTURING COM 829073105 5,972 406 7.29 343 25.64 0.0093
2017-11-09 2017-09-30 13F SIMPSON MANUFACTURING COM 829073105 5,566 -25 -0.45 273 11.89 0.0085
2017-08-10 2017-06-30 13F SIMPSON MANUFACTURING COM 829073105 5,591 112 2.04 244 3.39 0.0080
2017-05-12 2017-03-31 13F SIMPSON MANUFACTURING COM 829073105 5,479 -6 -0.11 236 -1.67 0.0117
2017-02-14 2016-12-31 13F SIMPSON MANUFACTURING COM 829073105 5,485 696 14.53 240 14.29 0.0108
2016-11-15 2016-09-30 13F/A-1 SIMPSON MANUFACTURING COM 829073105 4,789 0 0.00 210 4.48 0.0122
2016-08-16 2016-06-30 13F SIMPSON MANUFACTURING COM 829073105 4,789 4,789 201 0.0116
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.