Builders FirstSource, Inc.

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

(Amendment No. )

Filed by the Registrant ☒

Filed by a Party other than the Registrant ☐

Check the appropriate box:

Builders FirstSource, Inc.

(Name of registrant as specified in its charter)

(Name of person(s) filing proxy statement, if other than the registrant)

Payment of Filing Fee (Check all boxes that apply):

2025 Results Demonstrated Our Continued Resilience

Despite a soft housing environment, our resilient performance in 2025 demonstrated disciplined execution as we sustained healthy profitability and free cash flow, underscoring our operational excellence and the effectiveness of our strategic investments. Over the past few years, we have transformed Builders FirstSource into a materially stronger company, powered by our industry-leading value-added offerings and digital solutions, a relentless focus on operational excellence, and superior capital deployment. We invested more than $110 million on new, expanded, or upgraded value-added operations across our footprint, delivering significant value to builders by replacing skilled labor on the job site and allowing us to capture attractive margins. We continue to differentiate by digitally enabling our team members, customer relationships, and value-added product development to drive long-term growth through technology-driven platforms and services. Investments in automation, artificial intelligence, and digital integrations highlight our commitment to creating seamless customer experiences that streamline their operations. Operational excellence remains central to how we run our business as we develop talent, improve agility, and embed technology throughout our operations. We also generated $48 million in productivity savings in 2025 primarily through targeted supply chain initiatives.

Focused on Shareholder Returns

Our Board of Directors and management team are focused on maximizing shareholder returns. Our business generates consistently strong free cash flow through the cycle, which we deploy under our balanced capital allocation strategy. This disciplined capital deployment framework remains in place: maintaining a fortress balance sheet, investing in organic growth, making value-enhancing acquisitions, and returning capital to shareholders through share repurchases. We continue to invest in our business to grow, focusing on manufacturing automation, capacity expansion, and digital improvements. In 2025, we deployed nearly $2 billion toward return-enhancing opportunities aligned with our priorities. We completed eight acquisitions last year, including Pleasant Valley Homes in November. This acquisition expands our prefabricated component strategy and helps address key challenges in the homebuilding industry, such as affordability and labor shortages, by providing a cost‑competitive, factory‑built option that reduces builder cycle times. Since the merger with BMC in 2021, we have completed 40 acquisitions representing over $2.3 billion in annual sales that have expanded our footprint in high-growth geographies and enhanced our value-added offerings, demonstrating our ability to identify, execute and seamlessly integrate strategic opportunities.

59%

3-year TSR

152%

5-year TSR

829%

10-year TSR

We are returning capital to shareholders through opportunistic share buybacks, repurchasing approximately $400 million of shares in 2025 and approximately 48% of our outstanding shares since August 2021. Amid a challenging operating environment, we have produced impressive historical shareholder returns through our efforts to compound value.

TSR calculations as of December 31, 2025.

Committed to Our Team Members and Corporate Social Responsibility

Our people-first culture is a key contributor to our leading position as we attract, train, and retain the best talent in the industry and possess a field leadership team with more than 30 years of average experience. Safety is a top priority, and we have maintained our best-in-class safety performance and continued our relentless drive toward zero incidents.

Our annual team member engagement survey showed a 77% favorability rating in line with the prior survey. We are committed to maintaining engagement with our team members and enhancing their experience at Builders FirstSource. As part of our ongoing efforts to enhance the team member experience, we are pleased to present for your approval a new Employee Stock Purchase Plan, which is designed to give our employees the opportunity to share more directly in the Company’s long‑term success and further align their interests with those of our stockholders.

We are also making meaningful progress on our corporate social responsibility journey. In 2025, we introduced emissions reduction targets that demonstrate our commitment to enhanced reporting, supported by robust data capture and analysis of our emissions drivers and potential mitigation strategies. We continue to enhance our corporate social responsibility initiatives in a purposeful manner to benefit our customers, team members, and stakeholders.

Board Refreshment Milestones

In March 2025, we appointed Cheryl Ainoa and Maria Renz to our Board of Directors. Mses. Ainoa and Renz bring extensive expertise in e-commerce, technology, and digital innovation, helping us further strengthen our digital leadership and reinforcing our commitment to delivering best-in-class solutions to our customers. Our Board also recently formed a Technology Committee in an effort to further strengthen board oversight of our digital and technology strategy and systems.

Additionally, our stockholders approved a proposal to declassify our Board of Directors at the 2025 annual meeting of stockholders. Beginning this year, director nominees will be nominated to one‑year terms, resulting in all directors standing for annual election beginning with the 2028 annual meeting of stockholders.

We invite you to attend the annual meeting of stockholders of Builders FirstSource, Inc., which will take place at 6031 Connection Drive, Irving, Texas 75039, on Thursday, May 14, 2026, at 9:00 a.m. local time. Details of the business to be conducted at the annual meeting follow. Your vote is important to us. Even if you intend to join us in person, we encourage you to vote in advance, so we will know we have a quorum of stockholders for the meeting. When you vote in advance, please also indicate your intention to personally attend the annual meeting. See the Question and Answer section on page 94 of the Proxy Statement for instructions should you plan to attend in person.

A MESSAGE TO OUR STOCKHOLDERS

A MESSAGE TO OUR STOCKHOLDERS

On behalf of the Board of Directors and the executive management team, we would like to express our appreciation for your continued interest in the affairs of Builders FirstSource and ask for your support of management at this year’s annual meeting.

Place:

6031 Connection Drive

Irving, Texas 75039

Time:

9:00 a.m. local time

Record Date:

March 16, 2026

Date:

Thursday,

May 14, 2026