SSD

SEC source: 0000920371-25-000039 · wk-form4_1740015687.xml · nonDerivative · entry 2

Burton Phillip · CIK 0001959680 · EVP, North America

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,488

F3 · shares: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's restricted stock units that vested on February 18, 2025.

F4 · balance_after: Includes 2,635 restricted stock units that have not yet vested and 774 shares of common stock deferred under the Plan which will settle pursuant to the applicable terms of the Reporting Person's deferral election.

SEC source: 0000920371-25-000039 · wk-form4_1740015687.xml · nonDerivative · entry 1

Burton Phillip · CIK 0001959680 · EVP, North America

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,762

F1 · shares: At the election of the Reporting Person, the shares of common stock acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will settle on a future date selected by the Reporting Person at the time of his or her deferral election.

F2 · shares: Represents performance stock units granted in January 2022, for which the performance and vesting periods ended December 31, 2024, and for which the settlement date was February 18, 2025.

SEC source: 0000920371-25-000038 · wk-form4_1740015677.xml · nonDerivative · entry 1

Andersen Michael · CIK 0001959617 · EVP, Europe

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,810

F1 · shares: Represents performance stock units granted in January 2022, for which the performance and vesting periods ended December 31, 2024, and for which the settlement date was February 18, 2025.

F2 · balance_after: Includes 2,108 restricted stock units that have not yet vested.

SEC source: 0000920371-25-000037 · wk-form4_1740015667.xml · nonDerivative · entry 2

Olosky Michael · CIK 0001833593 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,858

F3 · shares: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's restricted stock units that vested on February 18, 2025.

F4 · balance_after: Includes 15,990 restricted stock units that have not yet vested and 12,664 shares of common stock deferred under the Plan which will settle pursuant to the applicable terms of the Reporting Person's deferral election.

SEC source: 0000920371-25-000037 · wk-form4_1740015667.xml · nonDerivative · entry 1

Olosky Michael · CIK 0001833593 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,697

F1 · shares: At the election of the Reporting Person, the shares of common stock acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will settle on a future date selected by the Reporting Person at the time of his or her deferral election.

F2 · shares: Represents performance stock units granted in January 2022, for which the performance and vesting periods ended December 31, 2024, and for which the settlement date was February 18, 2025.

SEC source: 0000920371-25-000025 · wk-form4_1738622146.xml · nonDerivative · entry 1

Payton Cassandra · CIK 0002003832 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,350

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2026.

F2 · balance_after: Includes 3,073 Restricted Stock Units that have not yet vested.

SEC source: 0000920371-25-000024 · wk-form4_1738622135.xml · nonDerivative · entry 1

Mehta Udit · CIK 0002022638 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,726

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2026.

F2 · balance_after: Includes 4,726 Restricted Stock Units that have not yet vested.

SEC source: 0000920371-25-000023 · wk-form4_1738622124.xml · nonDerivative · entry 1

Lutz Jennifer · CIK 0001959616 · EVP, Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,953

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2026.

F2 · balance_after: Includes 2,129 restricted stock units that have not yet vested.

SEC source: 0000920371-25-000022 · wk-form4_1738622114.xml · nonDerivative · entry 1

Gilstrap Jeremy · CIK 0001959672 · EVP, Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 10,022

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2026.

F2 · balance_after: Includes 2,790 restricted stock units that have not yet vested.

SEC source: 0000920371-25-000021 · wk-form4_1738622104.xml · nonDerivative · entry 1

Dunn Matt · CIK 0002025742 · SVP - Finance

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,262

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2026.

F2 · balance_after: Includes 2,262 Restricted Stock Units that have not yet vested.

SEC source: 0000920371-25-000020 · wk-form4_1738622095.xml · nonDerivative · entry 1

Burton Phillip · CIK 0001959680 · EVP, North America

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,299

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2026.

F2 · balance_after: Includes 3,755 restricted stock units that have not yet vested.

SEC source: 0000920371-25-000018 · wk-form4_1738622074.xml · nonDerivative · entry 1

Olosky Michael · CIK 0001833593 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,389

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2026.

F2 · balance_after: Includes 22,575 Restricted Stock Units that have not yet vested.

SEC source: 0000920371-25-000019 · wk-form4_1738622084.xml · nonDerivative · entry 1

Andersen Michael · CIK 0001959617 · EVP, Europe

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,347

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2026.

F2 · balance_after: Includes 3,115 restricted stock units that have not yet vested.

SEC source: 0000920371-25-000009 · wk-form4_1735941183.xml · nonDerivative · entry 1

Drake Angela C · CIK 0001807854 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 230

F1 · shares: Represents 230 restricted stock units acquired pursuant to the Company's non-employee director compensation policy.

SEC source: 0000920371-24-000192 · wk-form4_1734051497.xml · nonDerivative · entry 1

Dankel Roger · CIK 0001601647 · EVP, NA Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,192

F1 · kind: Reflects the gift of common stock to a charitable donor advised fund.

F2 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000189 · wk-form4_1733437479.xml · nonDerivative · entry 1

Dankel Roger · CIK 0001601647 · EVP, NA Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,814

F1 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000188 · wk-form4_1733437469.xml · nonDerivative · entry 1

Lutz Jennifer · CIK 0001959616 · EVP, Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,333

F1 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000174 · wk-form4_1724963543.xml · nonDerivative · entry 1

ANDRASICK JAMES S · CIK 0001206906 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 866

SEC source: 0000920371-24-000172 · wk-form4_1724794405.xml · nonDerivative · entry 1

Andersen Michael · CIK 0001959617 · EVP, Europe

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,438

F1 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000171 · wk-form4_1724794271.xml · nonDerivative · entry 2

Olosky Michael · CIK 0001833593 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,534

F2 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000171 · wk-form4_1724794271.xml · nonDerivative · entry 1

Olosky Michael · CIK 0001833593 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 20,443

F1 · balance_after: Includes Restricted Stock Units that have not yet vested. Also includes an additional 9.4633 shares not previously reported due to an administrative error.

SEC source: 0000920371-24-000165 · wk-form4_1723581030.xml · nonDerivative · entry 1

Lutz Jennifer · CIK 0001959616 · EVP, Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,033

F1 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000160 · wk-form4_1722889812.xml · nonDerivative · entry 1

Dankel Roger · CIK 0001601647 · EVP, NA Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 24,064

F1 · price: The price reported is a weighted average sales price. The shares were sold in multiple transactions at prices ranging from $190.43 to $190.75, inclusive. The reporting person undertakes to provide to the Company, any security holder of the Company or the staff of the Securities Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote.

F2 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000143 · wk-form4_1717618114.xml · nonDerivative · entry 1

Dunn Matt · CIK 0002025742 · SVP - Finance

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 568

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2025.

F2 · balance_after: Includes 568 Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000134 · wk-form4_1716326042.xml · nonDerivative · entry 1

Lutz Jennifer · CIK 0001959616 · EVP, Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,033

F1 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000132 · wk-form4_1715805184.xml · nonDerivative · entry 1

Dankel Roger · CIK 0001601647 · EVP, NA Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,764

F1 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000127 · wk-form4_1715724897.xml · nonDerivative · entry 2

Mehta Udit · CIK 0002022638 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,921

F2 · shares: Represents a sign-on award of Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2025.

F3 · balance_after: Includes 3,921 Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000127 · wk-form4_1715724897.xml · nonDerivative · entry 1

Mehta Udit · CIK 0002022638 · Chief Technology Officer

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 999

F1 · shares: Represents Restricted Stock Units (RSUs). Each RSU represents a right to receive, subject to the terms and conditions of the 2011 Equity Incentive Plan and an RSU Award Agreement, one share of the Company's common stock subject to vesting in three equal annual installments, beginning in February 2025.

SEC source: 0000920371-24-000110 · wk-form4_1714689538.xml · nonDerivative · entry 1

Knight Kenneth D. · CIK 0001817388 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,314

F1 · shares: At the election of the Reporting Person, the restricted stock units acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will be settled in shares of common stock on a future date selected by the Reporting Person at the time of his or her deferral election.

F2 · shares: Represents 642 restricted stock units acquired pursuant to the Company's non-employee director compensation policy.

F3 · balance_after: Includes 1,367 restricted stock units deferred under the Plan which will settle in shares of common stock pursuant to the applicable terms of the Reporting Person's deferral election.

SEC source: 0000920371-24-000109 · wk-form4_1714689524.xml · nonDerivative · entry 1

FORD CELESTE VOLZ · CIK 0001397729 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,651

F1 · shares: Represents 642 shares acquired pursuant to the Company's non-employee director compensation policy.

SEC source: 0000920371-24-000108 · wk-form4_1714689505.xml · nonDerivative · entry 1

Donaldson Philip E · CIK 0001737667 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,389

F1 · shares: Represents 840 shares acquired pursuant to the Company's non-employee director compensation policy.

SEC source: 0000920371-24-000107 · wk-form4_1714689493.xml · nonDerivative · entry 1

CUSUMANO GARY M · CIK 0001022676 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,714

F1 · shares: Represents 642 shares acquired pursuant to the Company's non-employee director compensation policy.

SEC source: 0000920371-24-000106 · wk-form4_1714689479.xml · nonDerivative · entry 1

Coney Felica · CIK 0001979605 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,558

F1 · shares: Represents 642 restricted stock units acquired pursuant to the Company's non-employee director compensation policy.

SEC source: 0000920371-24-000105 · wk-form4_1714689467.xml · nonDerivative · entry 1

Banks Chau · CIK 0001816462 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,558

F1 · shares: At the election of the Reporting Person, the restricted stock units acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will be settled in shares of common stock on a future date selected by the Reporting Person at the time of his or her deferral election.

F2 · shares: Represents 642 shares acquired pursuant to the Company's non-employee director compensation policy.

F3 · balance_after: Includes 642 restricted stock units deferred under the Plan which will settle in shares of common stock pursuant to the applicable terms of the Reporting Person's deferral election.

SEC source: 0000920371-24-000104 · wk-form4_1714689454.xml · nonDerivative · entry 1

ANDRASICK JAMES S · CIK 0001206906 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,366

F1 · shares: Represents 642 shares acquired pursuant to the Company's non-employee director compensation policy.

SEC source: 0000920371-24-000086 · wk-form4_1711139922.xml · nonDerivative · entry 1

Dankel Roger · CIK 0001601647 · EVP, NA Sales

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 28,764

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000070 · wk-form4_1709851835.xml · nonDerivative · entry 1

Burton Phillip · CIK 0001959680 · EVP, North America

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,044

F1 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000069 · wk-form4_1709851823.xml · nonDerivative · entry 1

ANDRASICK JAMES S · CIK 0001206906 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · By Trust

Disclosed balance after: 5,645

F1 · ownership.nature: These shares are held by The James S Andrasick Revocable Living Trust. The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.

SEC source: 0000920371-24-000057 · wk-form4_1708551541.xml · nonDerivative · entry 1

Dankel Roger · CIK 0001601647 · EVP, NA Sales

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 29,614

F1 · kind: This transaction was made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.

F2 · balance_after: Includes Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000055 · wk-form4_1708468775.xml · nonDerivative · entry 2

Swartzendruber Kevin Lee · CIK 0001732479 · Senior VP of Finance

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 7,192

F3 · shares: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's performance stock units that settled on February 15, 2024, and restricted stock units that vested on February 15, 2024.

F4 · balance_after: Includes 942 restricted stock units that have not yet vested and 982 shares of common stock deferred under the Plan which will settle pursuant to the applicable terms of the Reporting Person's deferral election.

SEC source: 0000920371-24-000055 · wk-form4_1708468775.xml · nonDerivative · entry 1

Swartzendruber Kevin Lee · CIK 0001732479 · Senior VP of Finance

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,038

F1 · shares: Represents performance stock units granted in January 2021, for which the performance and vesting periods ended December 31, 2023, and for which the settlement date was February 15, 2024.

F2 · shares: At the election of the Reporting Person, a portion of the shares of common stock acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will settle on a future date selected by the Reporting Person at the time of his or her deferral election.

SEC source: 0000920371-24-000054 · wk-form4_1708468733.xml · nonDerivative · entry 1

Payton Cassandra · CIK 0002003832 · EVP, General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,133

F1 · shares: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's restricted stock units that vested on February 15, 2024.

F2 · balance_after: Includes 1,856 Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000052 · wk-form4_1708468665.xml · nonDerivative · entry 2

Dankel Roger · CIK 0001601647 · EVP, NA Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,464

F2 · shares: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's performance stock units that settled on February 15, 2024 and restricted stock units that vested on February 15, 2024.

F3 · ownership.direct: Includes 2,740 Restricted Stock Units that have not yet vested.

SEC source: 0000920371-24-000052 · wk-form4_1708468665.xml · nonDerivative · entry 1

Dankel Roger · CIK 0001601647 · EVP, NA Sales

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,617

F1 · shares: Represents performance stock units granted in January 2021, for which the performance and vesting periods ended December 31, 2023, and for which the settlement date was February 15, 2024.

SEC source: 0000920371-24-000053 · wk-form4_1708468694.xml · nonDerivative · entry 2

Lutz Jennifer · CIK 0001959616 · EVP, Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,783

F3 · shares: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's performance stock units that settled on February 15, 2024, and restricted stock units that vested on February 15, 2024.

F4 · balance_after: Includes 1,509 restricted stock units that have not yet vested and 667 shares of common stock deferred under the Plan which will settle pursuant to the applicable terms of the Reporting Person's deferral election.

SEC source: 0000920371-24-000053 · wk-form4_1708468694.xml · nonDerivative · entry 1

Lutz Jennifer · CIK 0001959616 · EVP, Human Resources

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,274

F1 · shares: Represents performance stock units granted in January 2021, for which the performance and vesting periods ended December 31, 2023, and for which the settlement date was February 15, 2024.

F2 · shares: At the election of the Reporting Person, a portion of the shares of common stock acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will settle on a future date selected by the Reporting Person at the time of his or her deferral election.

SEC source: 0000920371-24-000051 · wk-form4_1708468636.xml · nonDerivative · entry 2

Gilstrap Jeremy · CIK 0001959672 · EVP, Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,132

F3 · shares: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's performance stock units that settled on February 15, 2024, and restricted stock units that vested on February 15, 2024.

F4 · balance_after: Includes 1,900 restricted stock units that have not yet vested and 441 shares of common stock deferred under the Plan which will settle pursuant to the applicable terms of the Reporting Person's deferral election.

SEC source: 0000920371-24-000051 · wk-form4_1708468636.xml · nonDerivative · entry 1

Gilstrap Jeremy · CIK 0001959672 · EVP, Innovation

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 9,546

F1 · shares: Represents performance stock units granted in January 2021, for which the performance and vesting periods ended December 31, 2023, and for which the settlement date was February 15, 2024.

F2 · shares: At the election of the Reporting Person, a portion of the shares of common stock acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will settle on a future date selected by the Reporting Person at the time of his or her deferral election.

SEC source: 0000920371-24-000050 · wk-form4_1708468581.xml · nonDerivative · entry 2

Burton Phillip · CIK 0001959680 · EVP, North America

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,044

F3 · shares: Represents shares of common stock withheld by the Company to satisfy the tax withholding obligation for the reporting person's performance stock units that settled on February 15, 2024, and restricted stock units that vested on February 15, 2024.

F4 · balance_after: Includes 2,500 restricted stock units that have not yet vested and 311 shares of common stock deferred under the Plan which will settle pursuant to the applicable terms of the Reporting Person's deferral election.

SEC source: 0000920371-24-000050 · wk-form4_1708468581.xml · nonDerivative · entry 1

Burton Phillip · CIK 0001959680 · EVP, North America

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,525

F1 · shares: Represents performance stock units granted in January 2021, for which the performance and vesting periods ended December 31, 2023, and for which the settlement date was February 15, 2024.

F2 · shares: At the election of the Reporting Person, a portion of the shares of common stock acquired pursuant to this filing have been deferred under the Simpson Manufacturing Co., Inc. Nonqualified Plan (the "Plan") and will settle on a future date selected by the Reporting Person at the time of his or her deferral election.