Letter to Stockholders

To Our Fellow Stockholders:

Thank you for your continued investment in Simpson Manufacturing Co., Inc. (the "Company", "Simpson", "we" or "us"). We cordially invite you to attend Simpson's 2024 Annual Meeting of Stockholders (the "Annual Meeting"), to be held virtually, via live webcast at www.virtualshareholdermeeting.com/SSD2024, at 10:00 a.m., Pacific Daylight Time, on Wednesday, May 1, 2024. Stockholders attending the virtual meeting will be afforded the same rights and opportunities to participate as they would at an in-person meeting. Further information on attending, voting, and submitting questions at the Annual Meeting are included in the accompanying Notice of Annual Meeting and Proxy Statement.

Despite a challenging combination of high housing prices, rising interest rates, and lowered housing starts compared to the prior year, our industry position and growth strategies continued to deliver above-market growth and strong profitability in 2023 and we remain committed to positioning Simpson to continue this growth over the long-term. To this end, in 2023 we achieved consolidated full-year net sales of approximately $2.2 billion, and produced strong earnings of $8.26 per diluted share. In addition, we delivered on nearly every target we had set as part of our 2023 initiatives, strengthened our position in the end markets of residential, component manufacturers, national retail, and Europe with the ongoing integration of ETANCO.

Our Proxy Statement is an opportunity to reflect on the Company's performance, highlight the strengths and efforts of our Board and provide transparency into our corporate governance, sustainability and executive compensation practices. Our Board has a long-standing history of being overseen by independent directors with a diverse set of skills and experiences. We are very proud that 7 out of 8 directors will be independent and 37.5% of our directors will be female if all of the Board nominees are elected at the Annual Meeting.

The accompanying Proxy Statement further highlights key activities and accomplishments in 2023 and contains information on the matters that we are seeking your vote at the Annual Meeting. On behalf of the Board, our executive management team, and the entire Simpson organization, thank you for your continued interest and support.

Sincerely yours,

Mike Olosky

James Andrasick

President and Chief Executive Officer

Independent Chair of the Board

March 19, 2024

Your vote is important.

Whether or not you plan to attend the meeting, please take a few minutes now to vote your shares.

Simpson Manufacturing Co., Inc. - 2024 Proxy Statement

i

Notice of 2024 Annual Meeting of Stockholders

Date

Wednesday, May 1, 2024

Record Date and Voting

You are entitled to vote at the Simpson Manufacturing Co., Inc. (the "Company," "Simpson," "we" or "us") 2024 Annual Meeting of Stockholders, and any adjournment or postponement thereof (the "Annual Meeting") if you were a stockholder of record at the close of business on March 4, 2024 (the "Record Date"). Each share of common stock is entitled to one vote for each director nominee and one vote for each of the other proposals to be voted on at the Annual Meeting. There were 42,441,160 shares of our common stock outstanding on the Record Date.

Time

Items of Business

10:00 a.m.,

Pacific Daylight

1

To elect eight members to our Board of Directors, for terms expiring in 2025.

Time

2

To approve, on an advisory basis, named executive officer compensation.

Place

www.virtualshare holdermeeting

.com/SSD2024

Record Date

March 4, 2024

  • To approve an amendment to the Company's Certificate of Incorporation to adopt provisions limiting the liability of certain officers as permitted by Delaware law.
  • To ratify our Audit and Finance Committee's appointment of Grant Thornton LLP as our independent registered public accounting firm for the year ending December 31, 2024.
  • To transact such other business that properly comes before the meeting or any adjournment thereof.

Notice and Access

Instead of mailing a printed copy of our proxy materials, including our Annual Report to Stockholders and Annual Report on Form 10-K, to each stockholder of record, we are providing access to these materials via the Internet. This reduces the amount of paper necessary to produce these materials, as well as the costs associated with mailing these materials to all stockholders. Accordingly, on March 19, 2024, we will begin mailing a Notice of Internet Availability of Proxy Materials (the "Notice") to all stockholders of record as of the Record Date, and post our proxy materials on the website referenced in the Notice (www.proxyvote.com). As more fully described in the Notice, all stockholders may choose to access our proxy materials on the website referred to in the Notice and/or may request a printed set of our proxy materials. In addition, the Notice and website provide information regarding how you may request to receive proxy materials in printed form by mail or electronically by email on an ongoing basis.

Attending the Annual Meeting

Attend the Annual Meeting virtually and follow the instructions on the website. See page 75"Questions and Answers About the Annual Meeting of Stockholders and Voting" for details.

ii

Simpson Manufacturing Co., Inc. - 2024 Proxy Statement

Notice of 2024 Annual Meeting of Stockholders

Proxy Voting

Whether or not you plan to attend the meeting, it is important that your shares are represented and voted. We encourage you to vote before the meeting by returning your proxy card or voting via the internet or by telephone.

By Internet

By Telephone

By Mail

www.proxyvote.com

Toll-free1-800-690-6903

Follow instructions

on your proxy card

The Proxy Statement, Annual Report to Stockholders and Annual Report on Form 10-K are available on the Internet at www.proxyvote.com.

The following information applicable to the Annual Meeting may be found in the Proxy Statement and accompanying proxy card:

  • The date, time and location of the Annual Meeting;
  • A list of the matters intended to be acted on and our board's recommendations regarding those matters;
  • Any control/identification numbers that you need to access your proxy card; and
  • Information about attending and voting at the Annual Meeting.

By Order of the Board of Directors,

Cari Fisher

Corporate Secretary

March 19, 2024

Important Notice Regarding the Availability of Proxy Materials for the Annual Meeting of Stockholders to Be Held on May 1, 2024.

Simpson Manufacturing Co., Inc. - 2024 Proxy Statement

iii

Table of Contents

Notice of 2024 Annual Meeting of Stockholders

ii

Proxy Summary

1

Directors Skills and Experience

3

Corporate Governance Highlights

4

Corporate Social Responsibility Highlights

4

Recent Leadership Changes

5

2023 Executive Compensation Highlights

5

Corporate Governance

8

Item 1: Election of Directors

9

Election Process

9

2024 Nominees

9

Director Qualifications

14

Director Independence

15

Director Nominations

15

The Board's Role and Responsibilities

16

The Board's Role in Risk Management and ESG Oversight

16

Board and Committees Risk Oversight Responsibilities

17

Director Orientation and Education

18

Board and Committee Evaluations

18

Sustainability and Environmental and Social Responsibility

18

Communications with the Board

22

Political Activities and Contributions

22

Board Leadership Structure

22

Executive Sessions

22

Board of Directors and Its Committees

22

Restrictions on Hedging and Pledging Arrangements for All Employees and Directors

23

Board Committees

23

Compensation Committee Interlocks and Insider Participation

27

Compensation Consultant

27

Involvement in Certain Legal Proceedings

27

Related-Party Transactions

28

Compensation of Directors

29

2023 Director Compensation Table

29

iv

Simpson Manufacturing Co., Inc. - 2024 Proxy Statement

Item 2: Advisory Vote To Approve Named Executive Officer Compensation

Executive Officer Profiles

Compensation Discussion & Analysis

Executive Summary

NEO Compensation Program Design

Executive Compensation Analysis

Comparative Market Information in the Executive Compensation-Setting Process Compensation Committee Report

Executive Compensation Tables

2023 Summary Compensation Table

2023 Grants of Plan-Based Awards

Outstanding Equity Awards at 2023 Fiscal Year End

2023 Option Exercises and Stock Vested

Pension Benefits

2023 Non-Qualified Deferred Compensation Plans Potential Payments Upon Termination or Change in Control CEO Pay Ratio

Pay Versus Performance

31

31

34

34

38

42

50

54

55

55

57

59

60

60

61

62

64

65

Item 3: Approval of an Amendment to the Company's Certificate of Incorporation to Adopt

Provisions Limiting the Liability of Certain Officers as Permitted by Delaware Law

68

Proposed Charter Amendment

68

Item 4: Ratification of Appointment of Independent Registered Public Accounting Firm for Year Ending December 31, 2024

Audit and Finance Committee Evaluation

Report of the Audit and Finance Committee

Principal Accounting Fees and Services

69

69

70

71

Stock Ownership Information

72

Security Ownership of Directors and Executive Officers

72

Security Ownership of Certain Beneficial Owners

73

Delinquent Section 16(a) Reports

74

Equity Compensation Plan Information

74

Other Information

75

Questions and Answers About the Annual Meeting of Stockholders and Voting

75

Stockholders' Proposals

80

Appendix A - Amendment to Certificate of Incorporation

82

Simpson Manufacturing Co., Inc. - 2024 Proxy Statement

v

Table of Contents

Date

Wednesday,

May 1, 2024

Time

10:00 a.m., Pacific Daylight Time

Place

www.virtualshare holdermeeting

.com/SSD2024

Record Date

March 4, 2024

Proxy Summary

This summary does not contain all of the information that you should consider, and you should read the entire Proxy Statement carefully. As used in this Proxy Statement, unless the context otherwise indicates or requires, references to "Simpson," the "Company," "we," "us," and "our" mean Simpson Manufacturing Co., Inc. and its consolidated subsidiaries. We will first send and/or make available this Proxy Statement and the form of proxy for our 2024 Annual Meeting of Stockholders (the "Annual Meeting") to our stockholders on or about March 19, 2024.

How to Vote

By Internet

By Telephone

By Mail

www.proxyvote.com

Toll-free1-800-690-6903

Follow instructions

on your proxy card

Matters to be Voted On

Voting

Page

Recommendation

Reference

1

the election of each director nominee

"FOR"

9

2

the advisory vote to approve named executive officer

"FOR"

31

compensation

3

the approval of an amendment to the Company's

Certificate of Incorporation to adopt provisions limiting the

"FOR"

68

liability of certain officers as permitted by Delaware law.

4

the ratification of our Audit and Finance Committee's

"FOR"

69

appointment of Grant Thornton LLP as our independent

registered public accounting firm for the year ending

December 31, 2024.

Performance Highlights

Net Sales Growth

Operating Margins

ROIC

34.5%

23.4%

21.7%

24.6%

24.1%

4.6%

21.5%

21.1%

17.2%

2021

2022

2023

2021

2022

2023

2021

2022

2023

Simpson Manufacturing Co., Inc. - 2024 Proxy Statement

1

Proxy Summary

Table of Contents

Item 1:

Election of Directors

The Board of Directors (the "Board") has nominated eight nominees, for one year terms expiring in 2025, and recommends that stockholders vote for each nominee based on their specific background, experience, qualifications, attributes and skills.

The Board recommends a vote FOR each director nominee. Page 9

Director Nominees

Age

Director

Committees

Other Current Public

Since

Company Boards

James S. Andrasick

79

2012

Audit and Finance

None

Independent

Compensation and

Non-Executive Chair of the Board,

Leadership Development

Former Chief Executive Officer of

Corporate Strategy and

Matson Navigation Company, Inc.

Acquisitions

Nominating and ESG

Chau Banks

54

2023

Audit and Finance

None

Independent

Compensation and

Chief Information and Data Officer of

Leadership Development

The Clorox Company

Felica Coney

53

2023

Audit and Finance

None

Independent

Corporate Strategy and

Vice President, Global Server

Acquisitions

Operations of Google, Inc.

Gary M. Cusumano

80

2007

Compensation and

None

Independent

Leadership Development

Retired Chairman, Chief Executive

Chair

Officer and President of The Newhall

Corporate Strategy and

Land and Farming Company

Acquisitions

Philip E. Donaldson

62

2018

Audit and Finance Chair

None

Independent

Corporate Strategy and

Executive Vice President & Chief

Acquisitions

Financial Officer of Andersen

Corporation

Celeste Volz Ford

67

2014

Audit and Finance

None

Independent

Corporate Strategy and

Board Chair and Founder of Stellar

Acquisitions Chair

Solutions

Kenneth D. Knight

63

2021

Audit and Finance

Invitae Corporation

Independent

Nominating and ESG

President and Chief Executive Officer

of Invitae Corporation

Michael Olosky

55

2023

Corporate Strategy and

None

President and Chief Executive Officer,

Acquisitions

Simpson Manufacturing Co., Inc.

We believe our Board is appropriately refreshed, and our directors bring a balance of experience and fresh perspectives.

2

Simpson Manufacturing Co., Inc. - 2024 Proxy Statement

Table of Contents

Proxy Summary

Average Age

65

Average Tenure

7.1 Years

Independence

88%

Directors Skills and Expertise

The Board is comprised of directors with strong professional reputations, skills and experience in established companies and other organizations of comparable status and size to us and/or in areas or industries relevant to our business, strategy and operations. Core skills, experiences, and statistics for each of our director nominees are included in the summary graphics below. The current composition of the Board and its director nominees reflect director-selection criteria developed by the Nominating and ESG Committee to address our needs and priorities.

This past year, the Nominating and ESG Committee engaged with Heidrick & Struggles to refresh its method of reviewing and evaluating Board skills in an effort to (i) develop a more robust skills matrix that reflects each individual's strengths and expertise and (ii) better communicate to stockholders the key qualifications that each director nominee brings to the Board. Further discussion on the qualifications and experience of director nominees is included in the "2024 Nominees" section of this Proxy Statement.

Gender Diversity

Racial Diversity

Board Tenure

Board Skills

Olosky

Andrasick

Banks

Coney

Cusumano

Donaldson

Ford

Knight

Financial Expertise

n

n

Public Company CEO Experience

n

n

n

n

Innovation and Business

n

n

n

n

n

n

Transformation

Building Industry

n

n

n

Public Company Executive

Leadership and/or Corporate

n

n

n

n

n

n

n

n

Governance

Manufacturing

n

n

n

n

n

M&A/Strategic Transactions

n

n

n

n

n

Technology Expertise

n

n

n

n

n

International Perspective

n

n

n

n

Customer Experience and

n

n

n

n

Brand Management

Supply Chain/Logistics

n

n

n

n

n

Human Capital/Talent Mgmt.

n

n

Enterprise Risk Mgmt.

n

n

n

n

Sustainability and Environmental

n

n

  • Directors with experience in each category
  • Experience that qualifies but falls outside of the defined temporal range

* Statistics above are for director nominees, and do not include Ms. Chatman or Ms. MacGillivray.

** Average Age and Average Tenure are for nonemployee director nominees, and do not include Ms. Chatman, Ms. MacGillivray or Mr. Olosky.

Simpson Manufacturing Co., Inc. - 2024 Proxy Statement

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Disclaimer

Simpson Manufacturing Co. Inc. published this content on 01 May 2024 and is solely responsible for the information contained therein. Distributed by Public, unedited and unaltered, on 02 May 2024 10:43:16 UTC.