Business Combination Prospectus (Form 425)

Filed by Leggett & Platt, Incorporated

Pursuant to Rule 425 under the Securities Act of 1933,

as amended, and deemed filed pursuant to 14a-12

under the Securities Exchange Act of 1934, as amended

Subject Company: Leggett & Platt, Incorporated

Commission File No.: 001-07845

On April 13, 2026, Karl G. Glassman, President and Chief Executive Officer of Leggett & Platt, Incorporated ("Leggett & Platt"), distributed the following letter to Leggett & Platt employees in connection with the announcement of Leggett & Platt's agreement to be acquired by Somnigroup International Inc. ("Somnigroup").

LEG - SGI Employee Letter

TO: All Leggett Employees

SUBJECT: An Update from Karl Glassman

Dear Fellow Employees,

Moments ago, we announced that we have entered into an agreement to be acquired by Somnigroup International Inc in an all-stock transaction. You can find the joint press release we issued on our website [INSERT LINK].

Since late last year, our Board of Directors and management team have been thoughtfully and carefully considering the best path forward for Leggett & Platt. After extensive consideration, our Board determined that a combination of Leggett and Somnigroup is the right next step. We believe the transaction will create a stronger combined company that supports our employees, reinforces the long-term health of our business, and delivers sustainable value creation for our shareholders. Together with Somnigroup, we see an opportunity to accelerate innovation, strengthen manufacturing capabilities, and continue to deliver high-quality products that create value for our customers across all our businesses.

We are excited about the opportunities this next chapter creates for our employees, as Somnigroup is a valued, long-standing customer and partner whose culture aligns well with Leggett. Somnigroup operates a decentralized business model, with Tempur-Sealy, Mattress Firm, and Dreams operating as independent business units within the company. After the transaction closes, Somnigroup expects to operate Leggett as an independent business unit within Somnigroup with its own strategy, leadership and operations. I also plan to remain as CEO following the completion of the transaction to assist with a seamless transition to a new CEO of the Leggett business unit within twelve months of the closing date.

This announcement represents one step in a longer process, and we understand you will likely have questions along the way. While we do not have all the answers today, we are committed to sharing information as it becomes available. We included a set of FAQs [INSERT LINK] to help address some of your initial questions. If you have other questions, we encourage you to reach out to your manager or HR leader. You will also receive an invitation to a Teams meeting later this week, where I will share more details about this announcement.

Until the transaction is completed, Leggett will continue to operate as an independent company, and it is business as usual for all of us. The transaction is currently expected to close by year end 2026, subject to the satisfaction of customary closing conditions, including approval by Leggett's shareholders later this year and receipt of applicable regulatory approvals. Our focus remains on serving our customers and supporting one another, and the work you do every day continues to be critical to our success.

Leggett may be in the news following the announcement of this combination. Consistent with company policy, if you receive any media inquiries, please forward them to [email protected].

Thank you for your continued dedication and the contributions you make to Leggett every day. We truly appreciate your commitment as we move through this next chapter.

Sincerely,

Karl Glassman

EMPLOYEE FAQ

Details of Announcement

Details for Employees

Next Steps and Path to Completing the Transaction

Forward-Looking Statements

This communication contains statements that may be characterized as "forward-looking" within the meaning of the federal securities laws. Such statements might include information concerning one or more of Somnigroup's and Leggett & Platt's plans, guidance, objectives, goals, strategies, and other information that is not historical information. When used in this communication, the words "will," "targets," "expects," "anticipates," "plans," "proposed," "intends," "outlook," and variations of such words or similar expressions are intended to identify forward-looking statements. These forward-looking statements include, without limitation, statements relating to Somnigroup's expectations regarding the impact of the proposed transaction on Somnigroup's brands, products, customer base, results of operations, or financial position, its share repurchases, adjusted EPS, net leverage, operating cash flow, net income, future performance, cost and run-rate synergies, funding sources, expected capital structure, the financial impact of Leggett & Platt's existing long-term debt, ability to deleverage after the proposed transaction, the expected timing and likelihood of completion of the proposed transaction, the integration of Leggett & Platt with Somnigroup's business and personnel and Somnigroup's and Leggett & Platt's post-acquisition financial reporting. Any forward-looking statements contained herein are based upon current expectations and beliefs and various assumptions. There can be no assurance that these expectations or beliefs will prove correct.

Numerous factors, many of which are beyond Somnigroup's and Leggett & Platt's control, could cause actual results to differ materially from any that may be expressed herein as forward-looking statements. These potential risks include risks associated with Leggett & Platt's ongoing operations; the ability to obtain the requisite Leggett & Platt shareholder approval; the risk that Somnigroup or Leggett & Platt may be unable to obtain governmental and regulatory approvals required for the proposed transaction (and the risk that such approvals may result in the imposition of conditions that could adversely affect the combined company or the expected benefits of the proposed transaction); the risk that an event, change or other circumstance could give rise to the termination of the proposed transaction; the risk of delays in completing the proposed transaction; the ability to successfully integrate Leggett & Platt into Somnigroup's operations and realize synergies from the proposed transaction and the expected run-rate of such synergies; the possibility that the expected benefits of the acquisition are not realized when expected or at all; the risk that any announcement relating to the proposed transaction could have adverse effects on the market price of Somnigroup's or Leggett & Platt's common stock; the risk of litigation related to the proposed transaction; the diversion of management time from ongoing business operations and opportunities as a result of the proposed transaction; the risk of adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the proposed transaction; general economic, financial and industry conditions, particularly conditions relating to the financial performance and related credit issues present in the retail sector, as well as consumer confidence and the availability of consumer financing; the impact of the macroeconomic environment in both the U.S. and internationally on Somnigroup and Leggett & Platt; uncertainties arising from national and global events; industry competition; the effects of consolidation of retailers on revenues and costs; consumer acceptance and changes in demand for Somnigroup's and Leggett & Platt's products; and other risks inherent in Somnigroup's and Leggett & Platt's businesses.

All such factors are difficult to predict, are beyond Somnigroup's and Leggett & Platt's control, and are subject to additional risks and uncertainties, including those detailed in Somnigroup's annual report on Form 10-K for the year ended December 31, 2025 and those detailed in Leggett & Platt's annual report on Form 10-K for the year ended December 31, 2025. These risks, as well as other risks related to the proposed transaction, will be included in the Form S-4 and proxy statement/prospectus (each as defined below) that Somnigroup and Leggett & Platt intend to file with the United States Securities and Exchange Commission (the "SEC") in connection with the proposed transaction. There may be other factors that may cause Somnigroup's and Leggett & Platt's actual results to differ materially from the forward-looking statements. Neither Somnigroup nor Leggett & Platt undertakes any obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law.

No Offer or Solicitation

This communication is not intended to be, and shall not constitute, an offer to sell, buy or exchange or the solicitation of an offer to sell, buy or exchange any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Additional Information and Where to Find It

In connection with the proposed transaction, Somnigroup intends to file with the SEC a registration statement on Form S-4 (the "Form S-4") that will include a proxy statement of Leggett & Platt and that will also constitute a prospectus of Somnigroup with respect to the shares of Somnigroup common stock to be issued in the proposed transaction (the "proxy statement/prospectus"). The definitive proxy statement/prospectus (if and when available) will be filed with the SEC by, and mailed to shareholders of, Leggett & Platt. Each of Somnigroup and Leggett & Platt may also file other relevant documents with the SEC regarding the proposed transaction.

This communication is not a substitute for the Form S-4, the proxy statement/prospectus or any other document that Somnigroup or Leggett & Platt may file with the SEC in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF SOMNIGROUP AND LEGGETT & PLATT ARE URGED TO READ THE FORM S-4, THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, CAREFULLY IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and security holders will be able to obtain copies of these documents (if and when available), as well as other filings containing information about Somnigroup and Leggett & Platt, free of charge on the SEC's website at www.sec.gov. Copies of the documents filed with, or furnished to, the SEC by Somnigroup will be available free of charge on Somnigroup's website at https://somnigroup.com/investor-resources/financials/sec-filings/default.aspx. Copies of the documents filed with, or furnished to, the SEC by Leggett & Platt will be available free of charge on Leggett & Platt's website at https://leggett.gcs-web.com/financials/sec-filings. The information included on, or accessible through, Somnigroup's or Leggett & Platt's website is not incorporated by reference into this communication.

Participants in Solicitation

Somnigroup, Leggett & Platt and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies with respect to the proposed transaction under the rules of the SEC. You can find information about Somnigroup's executive officers and directors in Somnigroup's definitive proxy statement filed with the SEC on March 31, 2026, under the section entitled "Proposal No. 1 - Election of Directors - Executive Officers," "Proposal No. 1 - Election of Directors - Nominees to Board of Directors," "Stock Ownership - Stock Ownership of Certain Beneficial Owners and Directors and Executive Officers," "Executive Compensation and Related Information - Compensation of Executive Officers" and "Director Compensation." You can find information about Leggett & Platt's executive officers and directors in Leggett & Platt's Annual Report on Form 10-K for the year ended December 31, 2025, under the section entitled "Supplemental Information: Information about our Executive Officers," and "Directors, Executive Officers and Corporate Governance," and in Leggett & Platt's definitive proxy statement filed with the SEC on April 7, 2026, under the sections entitled "Corporate Governance and Board Matters - Director Compensation," "Proposals to be Voted On at the Annual Meeting - Proposal One: Election of Directors," "Executive Compensation and Related Matters - Compensation Discussion & Analysis" and "Security Ownership - Security Ownership of Directors and Executive Officers." Additional information regarding the interests of the participants in the solicitation of proxies will be included in the Form S-4, the proxy statement/prospectus and other relevant materials to be filed with the SEC if and when they become available. You should read the Form S-4 and the proxy statement/prospectus carefully when available before making any voting or investment decisions. You may obtain free copies of these documents using the sources indicated above.

Leggett & Platt made available the following frequently asked questions document to its employees on April 13, 2026, in connection with the announcement of Leggett & Platt's agreement to be acquired by Somnigroup.

LEG - SGI Employee FAQ

Details of Announcement

Details for Employees

Next Steps and Path to Completing the Transaction

Forward-Looking Statements

This communication contains statements that may be characterized as "forward-looking" within the meaning of the federal securities laws. Such statements might include information concerning one or more of Somnigroup's and Leggett & Platt's plans, guidance, objectives, goals, strategies, and other information that is not historical information. When used in this communication, the words "will," "targets," "expects," "anticipates," "plans," "proposed," "intends," "outlook," and variations of such words or similar expressions are intended to identify forward-looking statements. These forward-looking statements include, without limitation, statements relating to Somnigroup's expectations regarding the impact of the proposed transaction on Somnigroup's brands, products, customer base, results of operations, or financial position, its share repurchases, adjusted EPS, net leverage, operating cash flow, net income, future performance, cost and run-rate synergies, funding sources, expected capital structure, the financial impact of Leggett & Platt's existing long-term debt, ability to deleverage after the proposed transaction, the expected timing and likelihood of completion of the proposed transaction, the integration of Leggett & Platt with Somnigroup's business and personnel and Somnigroup's and Leggett & Platt's post-acquisition financial reporting. Any forward-looking statements contained herein are based upon current expectations and beliefs and various assumptions. There can be no assurance that these expectations or beliefs will prove correct.

Numerous factors, many of which are beyond Somnigroup's and Leggett & Platt's control, could cause actual results to differ materially from any that may be expressed herein as forward-looking statements. These potential risks include risks associated with Leggett & Platt's ongoing operations; the ability to obtain the requisite Leggett & Platt shareholder approval; the risk that Somnigroup or Leggett & Platt may be unable to obtain governmental and regulatory approvals required for the proposed transaction (and the risk that such approvals may result in the imposition of conditions that could adversely affect the combined company or the expected benefits of the proposed transaction); the risk that an event, change or other circumstance could give rise to the termination of the proposed transaction; the risk of delays in completing the proposed transaction; the ability to successfully integrate Leggett & Platt into Somnigroup's operations and realize synergies from the proposed transaction and the expected run-rate of such synergies; the possibility that the expected benefits of the acquisition are not realized when expected or at all; the risk that any announcement relating to the proposed transaction could have adverse effects on the market price of Somnigroup's or Leggett & Platt's common stock; the risk of litigation related to the proposed transaction; the diversion of management time from ongoing business operations and opportunities as a result of the proposed transaction; the risk of adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the proposed transaction; general economic, financial and industry conditions, particularly conditions relating to the financial performance and related credit issues present in the retail sector, as well as consumer confidence and the availability of consumer financing; the impact of the macroeconomic environment in both the U.S. and internationally on Somnigroup and Leggett & Platt; uncertainties arising from national and global events; industry competition; the effects of consolidation of retailers on revenues and costs; consumer acceptance and changes in demand for Somnigroup's and Leggett & Platt's products; and other risks inherent in Somnigroup's and Leggett & Platt's businesses.

All such factors are difficult to predict, are beyond Somnigroup's and Leggett & Platt's control, and are subject to additional risks and uncertainties, including those detailed in Somnigroup's annual report on Form 10-K for the year ended December 31, 2025 and those detailed in Leggett & Platt's annual report on Form 10-K for the year ended December 31, 2025. These risks, as well as other risks related to the proposed transaction, will be included in the Form S-4 and proxy statement/prospectus (each as defined below) that Somnigroup and Leggett & Platt intend to file with the United States Securities and Exchange Commission (the "SEC") in connection with the proposed transaction. There may be other factors that may cause Somnigroup's and Leggett & Platt's actual results to differ materially from the forward-looking statements. Neither Somnigroup nor Leggett & Platt undertakes any obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law.

No Offer or Solicitation

This communication is not intended to be, and shall not constitute, an offer to sell, buy or exchange or the solicitation of an offer to sell, buy or exchange any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Additional Information and Where to Find It

In connection with the proposed transaction, Somnigroup intends to file with the SEC a registration statement on Form S-4 (the "Form S-4") that will include a proxy statement of Leggett & Platt and that will also constitute a prospectus of Somnigroup with respect to the shares of Somnigroup common stock to be issued in the proposed transaction (the "proxy statement/prospectus"). The definitive proxy statement/prospectus (if and when available) will be filed with the SEC by, and mailed to shareholders of, Leggett & Platt. Each of Somnigroup and Leggett & Platt may also file other relevant documents with the SEC regarding the proposed transaction.

This communication is not a substitute for the Form S-4, the proxy statement/prospectus or any other document that Somnigroup or Leggett & Platt may file with the SEC in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF SOMNIGROUP AND LEGGETT & PLATT ARE URGED TO READ THE FORM S-4, THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, CAREFULLY IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and security holders will be able to obtain copies of these documents (if and when available), as well as other filings containing information about Somnigroup and Leggett & Platt, free of charge on the SEC's website at www.sec.gov. Copies of the documents filed with, or furnished to, the SEC by Somnigroup will be available free of charge on Somnigroup's website at https://somnigroup.com/investor-resources/financials/sec-filings/default.aspx. Copies of the documents filed with, or furnished to, the SEC by Leggett & Platt will be available free of charge on Leggett & Platt's website at https://leggett.gcs-web.com/financials/sec-filings. The information included on, or accessible through, Somnigroup's or Leggett & Platt's website is not incorporated by reference into this communication.

Participants in Solicitation

Somnigroup, Leggett & Platt and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies with respect to the proposed transaction under the rules of the SEC. You can find information about Somnigroup's executive officers and directors in Somnigroup's definitive proxy statement filed with the SEC on March 31, 2026, under the section entitled "Proposal No. 1 - Election of Directors - Executive Officers," "Proposal No. 1 - Election of Directors - Nominees to Board of Directors," "Stock Ownership - Stock Ownership of Certain Beneficial Owners and Directors and Executive Officers," "Executive Compensation and Related Information - Compensation of Executive Officers" and "Director Compensation." You can find information about Leggett & Platt's executive officers and directors in Leggett & Platt's Annual Report on Form 10-K for the year ended December 31, 2025, under the section entitled "Supplemental Information: Information about our Executive Officers," and "Directors, Executive Officers and Corporate Governance," and in Leggett & Platt's definitive proxy statement filed with the SEC on April 7, 2026, under the sections entitled "Corporate Governance and Board Matters - Director Compensation," "Proposals to be Voted On at the Annual Meeting - Proposal One: Election of Directors," "Executive Compensation and Related Matters - Compensation Discussion & Analysis" and "Security Ownership - Security Ownership of Directors and Executive Officers." Additional information regarding the interests of the participants in the solicitation of proxies will be included in the Form S-4, the proxy statement/prospectus and other relevant materials to be filed with the SEC if and when they become available. You should read the Form S-4 and the proxy statement/prospectus carefully when available before making any voting or investment decisions. You may obtain free copies of these documents using the sources indicated above.

The following communication was sent by Leggett & Platt to certain of its customers on April 13, 2026.

LEG - SGI Customer Letter

TO: INSERT

SUBJECT: An Update from Leggett & Platt

Dear [Valued Customer / INSERT],

Earlier today, we announced that we have entered into an agreement to be acquired by Somnigroup International Inc. in an all-stock transaction. You can find the joint press release we issued on our website [INSERT LINK].

Since late last year, our Board of Directors and management team have been thoughtfully and carefully considering the best path forward for Leggett & Platt. After extensive consideration, our Board determined that a combination of Leggett and Somnigroup is the right next step. We believe the transaction will create a stronger combined company with enhanced capabilities to continue delivering high-quality products and reliable service to our customers. Together with Somnigroup, we see an opportunity to accelerate innovation, strengthen manufacturing capabilities, and continue to deliver high-quality products that create value for our customers.

After the transaction closes, Somnigroup expects to operate Leggett as an independent business unit within Somnigroup, with its own strategy, leadership and operations. Your existing contracts remain in place, and your points of contact and operational teams are not expected to change, even after the transaction closes.

Until the transaction is completed, Leggett will continue to operate as an independent company, and it remains business as usual for us. The transaction is expected to close by year end 2026, subject to Leggett shareholder approval, regulatory approval, and other customary closing conditions.

All of us at Leggett remain focused on serving you as a trusted partner, with an unwavering commitment to excellent customer service, product quality, and innovation. You can continue to rely on us to deliver the high standards you have come to expect.

If you have any questions, please don't hesitate to reach out to your usual Leggett contact. Should there be any updates to share as this process continues, you can expect to hear directly from us.

Thank you for your partnership and continued support.

Sincerely,

NAME

Forward-Looking Statements

This communication contains statements that may be characterized as "forward-looking" within the meaning of the federal securities laws. Such statements might include information concerning one or more of Somnigroup's and Leggett & Platt's plans, guidance, objectives, goals, strategies, and other information that is not historical information. When used in this communication, the words "will," "targets," "expects," "anticipates," "plans," "proposed," "intends," "outlook," and variations of such

words or similar expressions are intended to identify forward-looking statements. These forward-looking statements include, without limitation, statements relating to Somnigroup's expectations regarding the impact of the proposed transaction on Somnigroup's brands, products, customer base, results of operations, or financial position, its share repurchases, adjusted EPS, net leverage, operating cash flow, net income, future performance, cost and run-rate synergies, funding sources, expected capital structure, the financial impact of Leggett & Platt's existing long-term debt, ability to deleverage after the proposed transaction, the expected timing and likelihood of completion of the proposed transaction, the integration of Leggett & Platt with Somnigroup's business and personnel and Somnigroup's and Leggett & Platt's post-acquisition financial reporting. Any forward-looking statements contained herein are based upon current expectations and beliefs and various assumptions. There can be no assurance that these expectations or beliefs will prove correct.

Numerous factors, many of which are beyond Somnigroup's and Leggett & Platt's control, could cause actual results to differ materially from any that may be expressed herein as forward-looking statements. These potential risks include risks associated with Leggett & Platt's ongoing operations; the ability to obtain the requisite Leggett & Platt shareholder approval; the risk that Somnigroup or Leggett & Platt may be unable to obtain governmental and regulatory approvals required for the proposed transaction (and the risk that such approvals may result in the imposition of conditions that could adversely affect the combined company or the expected benefits of the proposed transaction); the risk that an event, change or other circumstance could give rise to the termination of the proposed transaction; the risk of delays in completing the proposed transaction; the ability to successfully integrate Leggett & Platt into Somnigroup's operations and realize synergies from the proposed transaction and the expected run-rate of such synergies; the possibility that the expected benefits of the acquisition are not realized when expected or at all; the risk that any announcement relating to the proposed transaction could have adverse effects on the market price of Somnigroup's or Leggett & Platt's common stock; the risk of litigation related to the proposed transaction; the diversion of management time from ongoing business operations and opportunities as a result of the proposed transaction; the risk of adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the proposed transaction; general economic, financial and industry conditions, particularly conditions relating to the financial performance and related credit issues present in the retail sector, as well as consumer confidence and the availability of consumer financing; the impact of the macroeconomic environment in both the U.S. and internationally on Somnigroup and Leggett & Platt; uncertainties arising from national and global events; industry competition; the effects of consolidation of retailers on revenues and costs; consumer acceptance and changes in demand for Somnigroup's and Leggett & Platt's products; and other risks inherent in Somnigroup's and Leggett & Platt's businesses.

All such factors are difficult to predict, are beyond Somnigroup's and Leggett & Platt's control, and are subject to additional risks and uncertainties, including those detailed in Somnigroup's annual report on Form 10-K for the year ended December 31, 2025 and those detailed in Leggett & Platt's annual report on Form 10-K for the year ended December 31, 2025. These risks, as well as other risks related to the proposed transaction, will be included in the Form S-4 and proxy statement/prospectus (each as defined below) that Somnigroup and Leggett & Platt intend to file with the United States Securities and Exchange Commission (the "SEC") in connection with the proposed transaction. There may be other factors that may cause Somnigroup's and Leggett & Platt's actual results to differ materially from the forward-looking statements. Neither Somnigroup nor Leggett & Platt undertakes any obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law.

No Offer or Solicitation

This communication is not intended to be, and shall not constitute, an offer to sell, buy or exchange or the solicitation of an offer to sell, buy or exchange any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Additional Information and Where to Find It

In connection with the proposed transaction, Somnigroup intends to file with the SEC a registration statement on Form S-4 (the "Form S-4") that will include a proxy statement of Leggett & Platt and that will also constitute a prospectus of Somnigroup with respect to the shares of Somnigroup common stock to be issued in the proposed transaction (the "proxy statement/prospectus"). The definitive proxy statement/prospectus (if and when available) will be filed with the SEC by, and mailed to shareholders of, Leggett & Platt. Each of Somnigroup and Leggett & Platt may also file other relevant documents with the SEC regarding the proposed transaction.

This communication is not a substitute for the Form S-4, the proxy statement/prospectus or any other document that Somnigroup or Leggett & Platt may file with the SEC in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF SOMNIGROUP AND LEGGETT & PLATT ARE URGED TO READ THE FORM S-4, THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, CAREFULLY IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and security holders will be able to obtain copies of these documents (if and when available), as well as other filings containing information about Somnigroup and Leggett & Platt, free of charge on the SEC's website at www.sec.gov. Copies of the documents filed with, or furnished to, the SEC by Somnigroup will be available free of charge on Somnigroup's website at https://somnigroup.com/investor-resources/financials/sec-filings/default.aspx. Copies of the documents filed with, or furnished to, the SEC by Leggett & Platt will be available free of charge on Leggett & Platt's website at https://leggett.gcs-web.com/financials/sec-filings. The information included on, or accessible through, Somnigroup's or Leggett & Platt's website is not incorporated by reference into this communication.

Participants in Solicitation

Somnigroup, Leggett & Platt and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies with respect to the proposed transaction under the rules of the SEC. You can find information about Somnigroup's executive officers and directors in Somnigroup's definitive proxy statement filed with the SEC on March 31, 2026, under the section entitled "Proposal No. 1 - Election of Directors - Executive Officers," "Proposal No. 1 - Election of Directors - Nominees to Board of Directors," "Stock Ownership - Stock Ownership of Certain Beneficial Owners and Directors and Executive Officers," "Executive Compensation and Related Information - Compensation of Executive Officers" and "Director Compensation." You can find information about Leggett & Platt's executive officers and directors in Leggett & Platt's Annual Report on Form 10-K for the year ended December 31, 2025, under the section entitled "Supplemental Information: Information about our Executive Officers," and "Directors, Executive Officers and Corporate Governance," and in Leggett & Platt's definitive proxy statement filed with the SEC on April 7, 2026, under the sections entitled "Corporate Governance and Board Matters - Director Compensation," "Proposals to be Voted On at the Annual Meeting - Proposal One: Election of Directors," "Executive Compensation and Related Matters - Compensation Discussion & Analysis" and "Security Ownership - Security Ownership of Directors and Executive Officers." Additional information regarding the interests of the participants in the solicitation of proxies will be included in the Form S-4, the proxy statement/prospectus and other relevant materials to be filed with the SEC if and when they become available. You should read the Form S-4 and the proxy statement/prospectus carefully when available before making any voting or investment decisions. You may obtain free copies of these documents using the sources indicated above.

The following communication was sent by Leggett & Platt to certain of its business partners on April 13, 2026.

LEG - SGI Business Partner Letter

TO: Leggett Business Partners

SUBJECT: An Update from Leggett

[NAME / Insert Customary Greeting],

Earlier today, we announced that we have entered into an agreement to be acquired by Somnigroup International Inc. in an all-stock transaction. You can find the joint press release we issued here [INSERT LINK].

Since late last year, our Board of Directors and management team have been thoughtfully and carefully considering the best path forward for Leggett & Platt. After extensive consideration, our Board determined that a combination of Leggett and Somnigroup is the right next step. We believe the transaction will create a stronger combined company with enhanced capabilities to continue delivering high-quality products and reliable service to our customers. Together, with Somnigroup, we see an opportunity to accelerate innovation, strengthen manufacturing capabilities, and continue to deliver high-quality products that create value for our customers across all of our businesses and strengthen how we partner with you. We are excited about the opportunities this combination creates.

After the transaction closes, Somnigroup expects to operate Leggett as an independent business unit within Somnigroup, with its own strategy, leadership, and operations. Your existing contracts remain in place, and there are no changes to current programs, orders, or ways of working. You can continue to operate as you do today, including fulfilling existing commitments and invoicing through your normal processes.

Until the transaction is completed, Leggett will continue to operate as an independent company, and it remains business as usual for all of us. The transaction is expected to close by year end 2026, subject to Leggett shareholder approval, regulatory approval, and other customary closing conditions.

All of us at Leggett remain focused on working with you as a trusted partner and maintaining strong, consistent engagement across our supply chain, with unwavering commitment to reliability, product quality, and innovation. This announcement does not change our expectations of our partners or our ongoing business relationships. You can continue to rely on us to be a strong and dependable partner, and to deliver the high standards you've come to expect.

If you have any questions, please don't hesitate to reach out to your usual Leggett contact. Should there be any updates to share as this process continues, you can expect to hear from us directly.

Thank you for your partnership and continued support.

Sincerely,

NAME

Forward-Looking Statements

This communication contains statements that may be characterized as "forward-looking" within the meaning of the federal securities laws. Such statements might include information concerning one or more of Somnigroup's and Leggett & Platt's plans, guidance, objectives, goals, strategies, and other information that is not historical information. When used in this communication, the words "will," "targets," "expects," "anticipates," "plans," "proposed," "intends," "outlook," and variations of such words or similar expressions are intended to identify forward-looking statements. These forward-looking statements include, without limitation, statements relating to Somnigroup's expectations regarding the impact of the proposed transaction on Somnigroup's brands, products, customer base, results of operations, or financial position, its share repurchases, adjusted EPS, net leverage, operating cash flow, net income, future performance, cost and run-rate synergies, funding sources, expected capital structure, the financial impact of Leggett & Platt's existing long-term debt, ability to deleverage after the proposed transaction, the expected timing and likelihood of completion of the proposed transaction, the integration of Leggett & Platt with Somnigroup's business and personnel and Somnigroup's and Leggett & Platt's post-acquisition financial reporting. Any forward-looking statements contained herein are based upon current expectations and beliefs and various assumptions. There can be no assurance that these expectations or beliefs will prove correct.

Numerous factors, many of which are beyond Somnigroup's and Leggett & Platt's control, could cause actual results to differ materially from any that may be expressed herein as forward-looking statements. These potential risks include risks associated with Leggett & Platt's ongoing operations; the ability to obtain the requisite Leggett & Platt shareholder approval; the risk that Somnigroup or Leggett & Platt may be unable to obtain governmental and regulatory approvals required for the proposed transaction (and the risk that such approvals may result in the imposition of conditions that could adversely affect the combined company or the expected benefits of the proposed transaction); the risk that an event, change or other circumstance could give rise to the termination of the proposed transaction; the risk of delays in completing the proposed transaction; the ability to successfully integrate Leggett & Platt into Somnigroup's operations and realize synergies from the proposed transaction and the expected run-rate of such synergies; the possibility that the expected benefits of the acquisition are not realized when expected or at all; the risk that any announcement relating to the proposed transaction could have adverse effects on the market price of Somnigroup's or Leggett & Platt's common stock; the risk of litigation related to the proposed transaction; the diversion of management time from ongoing business operations and opportunities as a result of the proposed transaction; the risk of adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the proposed transaction; general economic, financial and industry conditions, particularly conditions relating to the financial performance and related credit issues present in the retail sector, as well as consumer confidence and the availability of consumer financing; the impact of the macroeconomic environment in both the U.S. and internationally on Somnigroup and Leggett & Platt; uncertainties arising from national and global events; industry competition; the effects of consolidation of retailers on revenues and costs; consumer acceptance and changes in demand for Somnigroup's and Leggett & Platt's products; and other risks inherent in Somnigroup's and Leggett & Platt's businesses.

All such factors are difficult to predict, are beyond Somnigroup's and Leggett & Platt's control, and are subject to additional risks and uncertainties, including those detailed in Somnigroup's annual report on Form 10-K for the year ended December 31, 2025 and those detailed in Leggett & Platt's annual report on Form 10-K for the year ended December 31, 2025. These risks, as well as other risks related to the proposed transaction, will be included in the Form S-4 and proxy statement/prospectus (each as defined below) that Somnigroup and Leggett & Platt intend to file with the United States Securities and Exchange Commission (the "SEC") in connection with the proposed transaction. There may be other factors that may cause Somnigroup's and Leggett & Platt's actual results to differ materially from the forward-looking statements. Neither Somnigroup nor Leggett & Platt undertakes any obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law.

No Offer or Solicitation

This communication is not intended to be, and shall not constitute, an offer to sell, buy or exchange or the solicitation of an offer to sell, buy or exchange any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Additional Information and Where to Find It

In connection with the proposed transaction, Somnigroup intends to file with the SEC a registration statement on Form S-4 (the "Form S-4") that will include a proxy statement of Leggett & Platt and that will also constitute a prospectus of Somnigroup with respect to the shares of Somnigroup common stock to be issued in the proposed transaction (the "proxy statement/prospectus"). The definitive proxy statement/prospectus (if and when available) will be filed with the SEC by, and mailed to shareholders of, Leggett & Platt. Each of Somnigroup and Leggett & Platt may also file other relevant documents with the SEC regarding the proposed transaction.

This communication is not a substitute for the Form S-4, the proxy statement/prospectus or any other document that Somnigroup or Leggett & Platt may file with the SEC in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF SOMNIGROUP AND LEGGETT & PLATT ARE URGED TO READ THE FORM S-4, THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, CAREFULLY IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and security holders will be able to obtain copies of these documents (if and when available), as well as other filings containing information about Somnigroup and Leggett & Platt, free of charge on the SEC's website at www.sec.gov. Copies of the documents filed with, or furnished to, the SEC by Somnigroup will be available free of charge on Somnigroup's website at https://somnigroup.com/investor-resources/financials/sec-filings/default.aspx. Copies of the documents filed with, or furnished to, the SEC by Leggett & Platt will be available free of charge on Leggett & Platt's website at https://leggett.gcs-web.com/financials/sec-filings. The information included on, or accessible through, Somnigroup's or Leggett & Platt's website is not incorporated by reference into this communication.

Participants in Solicitation

Somnigroup, Leggett & Platt and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies with respect to the proposed transaction under the rules of the SEC. You can find information about Somnigroup's executive officers and directors in Somnigroup's definitive proxy statement filed with the SEC on March 31, 2026, under the section entitled "Proposal No. 1 - Election of Directors - Executive Officers," "Proposal No. 1 - Election of Directors - Nominees to Board of Directors," "Stock Ownership - Stock Ownership of Certain Beneficial Owners and Directors and Executive Officers," "Executive Compensation and Related Information - Compensation of Executive Officers" and "Director Compensation." You can find information about Leggett & Platt's executive officers and directors in Leggett & Platt's Annual Report on Form 10-K for the year ended December 31, 2025, under the section entitled "Supplemental Information: Information about our Executive Officers," and "Directors, Executive Officers and Corporate Governance," and in Leggett & Platt's definitive proxy statement filed with the SEC on April 7, 2026, under the sections entitled "Corporate Governance and Board Matters - Director Compensation," "Proposals to be Voted On

at the Annual Meeting - Proposal One: Election of Directors," "Executive Compensation and Related Matters - Compensation Discussion & Analysis" and "Security Ownership - Security Ownership of Directors and Executive Officers." Additional information regarding the interests of the participants in the solicitation of proxies will be included in the Form S-4, the proxy statement/prospectus and other relevant materials to be filed with the SEC if and when they become available. You should read the Form S-4 and the proxy statement/prospectus carefully when available before making any voting or investment decisions. You may obtain free copies of these documents using the sources indicated above.

The following communication was sent by Leggett & Platt to certain investors and analysts on April 13, 2026.

LEG - SGI Investor-Analyst Note

TO: Leggett Investors/Analysts

SUBJECT: Leggett to be Acquired by Somnigroup in All-Stock Transaction

[NAME],

I am reaching out to share that we announced that Leggett & Platt has entered into an agreement to be acquired by Somnigroup International Inc. in an all-stock transaction valued at approximately $2.5 billion based on Somnigroup's closing share price on April 10, 2026. The joint press release we issued is linked here [INSERT LINK TO RELEASE], and a supplementary investor presentation is available at the following link: https://leggett.gcs-web.com/recent-documents.

Under the terms of the agreement, Leggett shareholders will receive 0.1455 shares of Somnigroup common stock in exchange for each share of Leggett common stock they own. Upon the completion of the transaction, which we expect to occur by year end 2026, Leggett shareholders will own approximately 9% of the combined company on a fully diluted basis.

The transaction, which has been unanimously approved by the Leggett Board of Directors, will create a stronger combined company that supports our employees and customers while reinforcing the long-term health of our business. Importantly, given the all-stock consideration, Leggett shareholders will be able to participate in the compelling future upside potential of the combined company, which is expected to benefit from:

[The Leggett and Somnigroup teams are available for a joint follow up call to discuss the announcement. Please reach out to Somnigroup's Investor Relations team if you would like to schedule time.][If you would like to schedule further time with our team to discuss the announcement, please let us know. We welcome your perspectives on the transaction.]

Thank you for your [investment and] support.

Sincerely,

Karl Glassman

Forward-Looking Statements

This communication contains statements that may be characterized as "forward-looking" within the meaning of the federal securities laws. Such statements might include information concerning one or more of Somnigroup's and Leggett & Platt's plans, guidance, objectives, goals, strategies, and other information that is not historical information. When used in this communication, the words "will," "targets," "expects," "anticipates," "plans," "proposed," "intends," "outlook," and variations of such words or similar expressions are intended to identify forward-looking statements. These forward-looking statements include, without limitation, statements relating to Somnigroup's expectations regarding the impact of the proposed transaction on Somnigroup's brands, products, customer base, results of operations, or financial position, its share repurchases, adjusted EPS, net leverage, operating cash flow, net income, future performance, cost and run-rate synergies, funding sources, expected capital structure, the financial impact of Leggett & Platt's existing long-term debt, ability to deleverage after the proposed transaction, the expected timing and likelihood of completion of the proposed transaction, the integration of Leggett & Platt with Somnigroup's business and personnel and Somnigroup's and Leggett & Platt's post-acquisition financial reporting. Any forward-looking statements contained herein are based upon current expectations and beliefs and various assumptions. There can be no assurance that these expectations or beliefs will prove correct.

Numerous factors, many of which are beyond Somnigroup's and Leggett & Platt's control, could cause actual results to differ materially from any that may be expressed herein as forward-looking statements. These potential risks include risks associated with Leggett & Platt's ongoing operations; the ability to obtain the requisite Leggett & Platt shareholder approval; the risk that Somnigroup or Leggett & Platt may be unable to obtain governmental and regulatory approvals required for the proposed transaction (and the risk that such approvals may result in the imposition of conditions that could adversely affect the combined company or the expected benefits of the proposed transaction); the risk that an event, change or other circumstance could give rise to the termination of the proposed transaction; the risk of delays in completing the proposed transaction; the ability to successfully integrate Leggett & Platt into Somnigroup's operations and realize synergies from the proposed transaction and the expected run-rate of such synergies; the possibility that the expected benefits of the acquisition are not realized when expected or at all; the risk that any announcement relating to the proposed transaction could have adverse effects on the market price of Somnigroup's or Leggett & Platt's common stock; the risk of litigation related to the proposed transaction; the diversion of management time from ongoing business operations and opportunities as a result of the proposed transaction; the risk of adverse reactions or changes to business or employee relationships, including those resulting from the announcement or completion of the proposed transaction; general economic, financial and industry conditions, particularly conditions relating to the financial performance and related credit issues present in the retail sector, as well as consumer confidence and the availability of consumer financing; the impact of the macroeconomic environment in both the U.S. and internationally on Somnigroup and Leggett & Platt; uncertainties arising from national and global events; industry competition; the effects of consolidation of retailers on revenues and costs; consumer acceptance and changes in demand for Somnigroup's and Leggett & Platt's products; and other risks inherent in Somnigroup's and Leggett & Platt's businesses.

All such factors are difficult to predict, are beyond Somnigroup's and Leggett & Platt's control, and are subject to additional risks and uncertainties, including those detailed in Somnigroup's annual report on Form 10-K for the year ended December 31, 2025 and those detailed in Leggett & Platt's annual report on Form 10-K for the year ended December 31, 2025. These risks, as well as other risks related to the proposed transaction, will be included in the Form S-4 and proxy statement/prospectus (each as defined below) that Somnigroup and Leggett & Platt intend to file with the United States Securities and Exchange Commission (the "SEC") in connection with the proposed transaction. There may be other factors that may cause Somnigroup's and Leggett & Platt's actual results to differ materially from the forward-looking statements. Neither Somnigroup nor Leggett & Platt undertakes any obligation to publicly update any forward-looking statement, whether as a result of new information, future events or otherwise, except as required by law.

No Offer or Solicitation

This communication is not intended to be, and shall not constitute, an offer to sell, buy or exchange or the solicitation of an offer to sell, buy or exchange any securities, or a solicitation of any vote or approval, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offering of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Additional Information and Where to Find It

In connection with the proposed transaction, Somnigroup intends to file with the SEC a registration statement on Form S-4 (the "Form S-4") that will include a proxy statement of Leggett & Platt and that will also constitute a prospectus of Somnigroup with respect to the shares of Somnigroup common stock to be issued in the proposed transaction (the "proxy statement/prospectus"). The definitive proxy statement/prospectus (if and when available) will be filed with the SEC by, and mailed to shareholders of, Leggett & Platt. Each of Somnigroup and Leggett & Platt may also file other relevant documents with the SEC regarding the proposed transaction.

This communication is not a substitute for the Form S-4, the proxy statement/prospectus or any other document that Somnigroup or Leggett & Platt may file with the SEC in connection with the proposed transaction. INVESTORS AND SECURITY HOLDERS OF SOMNIGROUP AND LEGGETT & PLATT ARE URGED TO READ THE FORM S-4, THE PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS FILED WITH THE SEC, AS WELL AS ANY AMENDMENTS OR SUPPLEMENTS TO THOSE DOCUMENTS, CAREFULLY IN THEIR ENTIRETY IF AND WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT THE PROPOSED TRANSACTION. Investors and security holders will be able to obtain copies of these documents (if and when available), as well as other filings containing information about Somnigroup and Leggett & Platt, free of charge on the SEC's website at www.sec.gov. Copies of the documents filed with, or furnished to, the SEC by Somnigroup will be available free of charge on Somnigroup's website at https://somnigroup.com/investor-resources/financials/sec-filings/default.aspx. Copies of the documents filed with, or furnished to, the SEC by Leggett & Platt will be available free of charge on Leggett & Platt's website at https://leggett.gcs-web.com/financials/sec-filings. The information included on, or accessible through, Somnigroup's or Leggett & Platt's website is not incorporated by reference into this communication.

Participants in Solicitation

Somnigroup, Leggett & Platt and certain of their respective directors and executive officers may be deemed to be participants in the solicitation of proxies with respect to the proposed transaction under the rules of the SEC. You can find information about Somnigroup's executive officers and directors in Somnigroup's definitive proxy statement filed with the SEC on March 31, 2026, under the section entitled "Proposal No. 1 - Election of Directors - Executive Officers," "Proposal No. 1 - Election of Directors - Nominees to Board of Directors," "Stock Ownership - Stock Ownership of Certain Beneficial Owners and Directors and Executive Officers," "Executive Compensation and Related Information - Compensation of Executive Officers" and "Director Compensation." You can find information about Leggett & Platt's executive officers and directors in Leggett & Platt's Annual Report on Form 10-K for the year ended December 31, 2025, under the section entitled "Supplemental Information: Information about our Executive Officers," and "Directors, Executive Officers and Corporate Governance," and in

Leggett & Platt's definitive proxy statement filed with the SEC on April 7, 2026, under the sections entitled "Corporate Governance and Board Matters - Director Compensation," "Proposals to be Voted On at the Annual Meeting - Proposal One: Election of Directors," "Executive Compensation and Related Matters - Compensation Discussion & Analysis" and "Security Ownership - Security Ownership of Directors and Executive Officers." Additional information regarding the interests of the participants in the solicitation of proxies will be included in the Form S-4, the proxy statement/prospectus and other relevant materials to be filed with the SEC if and when they become available. You should read the Form S-4 and the proxy statement/prospectus carefully when available before making any voting or investment decisions. You may obtain free copies of these documents using the sources indicated above.

The following announcement was made by Leggett & Platt via its LinkedIn account on April 13, 2026.

LEG - SGI LinkedIn Post