Simpson Manufacturing Co., Inc.
DE ˙ DB ˙ US8290731053
161,20 € ↓ −1,70 (−1,04%)
2026-06-04
DELAT PRIS
SecurityDE:TWL / Simpson Manufacturing Co., Inc.
InstitutionState Street Corp
Latest Disclosed Ownership1,271,188 shares
Latest Disclosed Value $ 218,161,285
State Street Corp reports 2.16% increase in ownership of TWL / Simpson Manufacturing Co., Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 1,271,188 shares of Simpson Manufacturing Co., Inc. (DE:TWL) valued at $187,627,349 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 1,244,366 shares of Simpson Manufacturing Co., Inc.. This represents a change in shares of 2.16% during the quarter. The current value of the position is $204,915,506 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 1,271,188 26,822 2.16 218,161 8.58 0.0075
2026-02-13 2025-12-31 13F SIMPSON MFG COM 829073105 1,244,366 -6,638 -0.53 200,928 -4.09 0.0067
2025-11-14 2025-09-30 13F SIMPSON MFG COM 829073105 1,251,004 1,593 0.13 209,493 7.96 0.0073
2025-08-14 2025-06-30 13F SIMPSON MFG COM 829073105 1,249,411 -75,221 -5.68 194,046 -6.74 0.0073
2025-05-15 2025-03-31 13F SIMPSON MFG COM 829073105 1,324,632 10,753 0.82 208,073 -4.50 0.0086
2025-02-14 2024-12-31 13F SIMPSON MFG COM 829073105 1,313,879 57,059 4.54 217,881 -9.36 0.0086
2024-11-14 2024-09-30 13F SIMPSON MFG COM 829073105 1,256,820 20,404 1.65 240,392 15.37 0.0098
2024-08-14 2024-06-30 13F SIMPSON MFG COM 829073105 1,236,416 -278,402 -18.38 208,373 -32.96 0.0091
2024-05-15 2024-03-31 13F SIMPSON MFG COM 829073105 1,514,818 47,301 3.22 310,810 6.98 0.0139
2024-02-14 2023-12-31 13F SIMPSON MFG COM 829073105 1,467,517 42,947 3.01 290,539 36.14 0.0141
2023-11-14 2023-09-30 13F SIMPSON MFG COM 829073105 1,424,570 15,448 1.10 213,415 9.35 0.0118
2023-08-14 2023-06-30 13F SIMPSON MFG COM 829073105 1,409,122 11,773 0.84 195,163 27.39 0.0102
2023-05-15 2023-03-31 13F SIMPSON MFG COM 829073105 1,397,349 40,293 2.97 153,205 27.34 0.0086
2023-05-15 2022-12-31 13F/A-99 SIMPSON MFG COM 829073105 1,357,056 10,117 0.75 120,317 13.94 0.0071
2023-05-15 2022-12-31 13F SIMPSON MFG COM 829073105 1,357,056 10,117 120,317 0.0071
2022-11-15 2022-09-30 13F SIMPSON MFG COM 829073105 1,346,939 7,675 0.57 105,600 -21.63 0.0067
2022-08-15 2022-06-30 13F SIMPSON MFG COM 829073105 1,339,264 -8,328 -0.62 134,743 -8.30 0.0081
2022-05-16 2022-03-31 13F SIMPSON MFG COM 829073105 1,347,592 22,435 1.69 146,941 -20.27 0.0073
2022-02-14 2021-12-31 13F SIMPSON MFG COM 829073105 1,325,157 21,364 1.64 184,290 32.14 0.0087
2021-11-15 2021-09-30 13F SIMPSON MFG COM 829073105 1,303,793 -4,682 -0.36 139,467 -3.70 0.0074
2021-08-16 2021-06-30 13F SIMPSON MFG COM 829073105 1,308,475 -3,463 -0.26 144,833 6.19 0.0076
2021-07-09 2021-03-31 13F/A-1 SIMPSON MFG COM 829073105 1,311,938 -15,227 -1.15 136,386 9.97 0.0078
2021-05-17 2021-03-31 13F SIMPSON MFG COM 829073105 1,311,938 -15,227 136,386 0.0078
2021-02-16 2020-12-31 13F SIMPSON MANUFACTURING COM 829073105 1,327,165 30,883 2.38 124,024 -1.76 0.0076
2020-11-10 2020-09-30 13F SIMPSON MANUFACTURING COM 829073105 1,296,282 -12,380 -0.95 126,244 14.35 0.0086
2020-08-14 2020-06-30 13F SIMPSON MANUFACTURING COM 829073105 1,308,662 -2,191 -0.17 110,399 35.88 0.0080
2020-06-19 2020-03-31 13F/A-1 SIMPSON MANUFACTURING COM 829073105 1,310,853 60,661 4.85 81,247 -19.23 0.0071
2020-05-11 2020-03-31 13F SIMPSON MANUFACTURING COM 829073105 1,310,853 60,661 81,247 7,135.1225
2020-02-06 2019-12-31 13F SIMPSON MANUFACTURING COM 829073105 1,250,192 -13,988 -1.11 100,592 14.71 0.0069
2019-11-14 2019-09-30 13F SIMPSON MANUFACTURING COM 829073105 1,264,180 25,786 2.08 87,696 6.55 0.0065
2019-08-14 2019-06-30 13F SIMPSON MANUFACTURING COM 829073105 1,238,394 72,091 6.18 82,304 19.06 0.0061
2019-05-15 2019-03-31 13F SIMPSON MANUFACTURING COM 829073105 1,166,303 31,870 2.81 69,127 12.57 0.0054
2019-02-12 2018-12-31 13F SIMPSON MANUFACTURING COM 829073105 1,134,433 -165,437 -12.73 61,407 -34.80 0.0056
2018-11-09 2018-09-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,299,870 55,204 4.44 94,186 21.68 0.0072
2018-08-14 2018-06-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,244,666 164,851 15.27 77,405 24.47 0.0065
2018-05-15 2018-03-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,079,815 10,561 0.99 62,186 1.31 0.0053
2018-02-14 2017-12-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,069,254 29,441 2.83 61,384 20.38 0.0049
2017-11-14 2017-09-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,039,813 -3,172 -0.30 50,990 11.85 0.0044
2017-08-14 2017-06-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,042,985 49,092 4.94 45,589 6.44 0.0040
2017-05-15 2017-03-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 993,893 68,546 7.41 42,829 5.78 0.0038
2017-02-09 2016-12-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 925,347 62,136 7.20 40,487 6.71 0.0038
2017-01-13 2016-09-30 13F/A-1 SIMPSON MANUFACTURING Common equity shares 829073105 863,211 38,781 4.70 37,940 15.14 0.0038
2016-11-14 2016-09-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 863,211 37,940
2016-08-12 2016-06-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 824,430 13,383 1.65 32,951 6.43 0.0035
2016-05-20 2016-03-31 13F/A-1 SIMPSON MANUFACTURING Common equity shares 829073105 811,047 8,742 1.09 30,960 12.99 0.0033
2016-05-12 2016-03-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 811,047 30,960
2016-02-16 2015-12-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 802,305 16,118 2.05 27,401 4.08 0.0030
2015-11-16 2015-09-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 786,187 -5,196 -0.66 26,328 -2.15 0.0031
2015-08-13 2015-06-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 791,383 -732,887 -48.08 26,906 -52.77 0.0029
2015-05-15 2015-03-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,524,270 342,365 28.97 56,962 39.30 0.0058
2015-02-11 2014-12-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,181,905 -152,841 -11.45 40,892 5.09 0.0041
2014-11-12 2014-09-30 13F/A-1 SIMPSON MANUFACTURING Common equity shares 829073105 1,334,746 -166,450 -11.09 38,912 -28.71 0.0042
2014-11-10 2014-09-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,334,746 38,912
2014-08-12 2014-06-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,501,196 -149,166 -9.04 54,583 -6.39 0.0059
2014-05-15 2014-03-31 13F/A-1 SIMPSON MANUFACTURING Common equity shares 829073105 1,650,362 131,980 8.69 58,307 4.54 0.0066
2014-05-13 2014-03-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,650,806 58,323
2014-02-06 2013-12-31 13F/A-1 SIMPSON MANUFACTURING Common equity shares 829073105 1,518,382 -9,127 -0.60 55,773 12.11 0.0062
2014-02-06 2013-12-31 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,596,120 52,338
2013-11-12 2013-09-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 1,527,509 -575,467 -27.36 49,747 -19.60 0.0061
2013-08-08 2013-06-30 13F SIMPSON MANUFACTURING Common equity shares 829073105 2,102,976 2,102,976 61,872 0.0081
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.