Karl G. Glassman - 26 Aug 2026 Form 4 Insider Report for SOMNIGROUP INTERNATIONAL INC. (SGI)

Reporting relationship: CEO - Leggett & Platt
Issuer ticker: SGI
Reported as of: 26 Aug 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 28 Aug 2026, 16:03:04 UTC
Prior SEC filing: 25 Aug 2026
Source filing: View source filing
Reporting owner signature: /s/ Bhaskar Rao Attorney-in-Fact

Key filing fact

Karl G. Glassman filed Form 4 for SOMNIGROUP INTERNATIONAL INC. (SGI) on 28 Aug 2026.

Key facts

This page summarizes Karl G. Glassman's Form 4 filing for SOMNIGROUP INTERNATIONAL INC. (SGI).
14 reported transactions and 11 derivative rows are listed below.
Accepted by SEC: 28 Aug 2026, 16:03.

Change

Previous filing in this sequence was filed on 25 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001166334 Primary reporting owner

GLASSMAN KARL G

Relationship: CEO - Leggett & Platt
Address: 100 CRESCENT CT. SUITE 700, DALLAS
Signature: /s/ Bhaskar Rao Attorney-in-Fact
Signature date: 28 Aug 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

SGI transaction

Common Stock

Award

Transaction value
Shares: +39,105
Change %
Price
Shares after: 39,105
Date: 26 Aug 2026
Ownership: Direct
Footnotes: F1

SGI transaction

Common Stock

Award

Transaction value
Shares: +74,835
Change %
Price
Shares after: 74,835
Date: 26 Aug 2026
Ownership: By Glassman Living Trust
Footnotes: F2

SGI transaction

Common Stock

Award

Transaction value
Shares: +4,239
Change %
Price
Shares after: 4,239
Date: 26 Aug 2026
Ownership: By 401(k) plan
Footnotes: F3

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

SGI transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +48,369
Change %
Price
Shares after: 48,369
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 48,369
Exercise price: $0.000000
Footnotes: F4

SGI transaction Derivative

Cash Settled Restricted Stock Units

Award

Transaction value
Shares: +48,369
Change %
Price
Shares after: 48,369
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 48,369
Exercise price: $0.000000
Footnotes: F5

SGI transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +10,749
Change %
Price
Shares after: 10,749
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 10,749
Exercise price: $0.000000
Footnotes: F6

SGI transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +65,556
Change %
Price
Shares after: 65,556
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 65,556
Exercise price: $0.000000
Footnotes: F7

SGI transaction Derivative

Cash Settled Restricted Stock Units

Award

Transaction value
Shares: +65,556
Change %
Price
Shares after: 65,556
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 65,556
Exercise price: $0.000000
Footnotes: F8

SGI transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +29,136
Change %
Price
Shares after: 29,136
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 29,136
Exercise price: $0.000000
Footnotes: F9

SGI transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +55,923
Change %
Price
Shares after: 55,923
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 55,923
Exercise price: $0.000000
Footnotes: F10

SGI transaction Derivative

Cash Settled Restricted Stock Units

Award

Transaction value
Shares: +55,923
Change %
Price
Shares after: 55,923
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 55,923
Exercise price: $0.000000
Footnotes: F11

SGI transaction Derivative

Restricted Stock Units

Award

Transaction value
Shares: +37,282
Change %
Price
Shares after: 37,282
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 37,282
Exercise price: $0.000000
Footnotes: F12

SGI transaction Derivative

Stock Option (right to buy)

Award

Transaction value
Shares: +8,009
Change %
Price
Shares after: 8,009
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 8,009
Exercise price: $249.69
Footnotes: F13

SGI transaction Derivative

Stock Option (right to buy)

Award

Transaction value
Shares: +5,953
Change %
Price
Shares after: 5,953
Date: 26 Aug 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 5,953
Exercise price: $335.95
Footnotes: F14

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 14 footnotes

Footnote F1

Leggett & Platt, Incorporated ("Leggett"), Issuer and Sparrow Unity Corporation, a direct, wholly owned subsidiary of Issuer ("Merger Sub") entered into an Agreement and Plan of Merger, dated April 13, 2026 (the "Merger Agreement") pursuant to which Merger Sub merged into Leggett (the "Merger"). Pursuant to the terms of the Merger Agreement, at the effective time of the Merger, each share of Leggett common stock was cancelled and converted into the right to receive 0.1455 shares of Issuer common stock. At the effective time of the Merger, the reporting person received the shares of Issuer common stock reflected above in exchange for 268,764 shares of Leggett common stock.

Footnote F2

Received shares of Issuer common stock in exchange for 514,335 shares of Leggett common stock in connection with the Merger.

Footnote F3

Received shares of Issuer common stock in exchange for 29,140 shares of Leggett common stock in connection with the Merger.

Footnote F4

Received in the Merger in exchange for employee performance stock units to acquire 166,216 shares of Leggett common stock at target. Pursuant to the terms of the Merger Agreement and as of the effective time of the Merger, the Leggett performance stock units were assumed by the Issuer and converted into the right to receive 0.1455 of Issuer restricted stock units on the same terms as initially awarded except the performance vesting conditions were deemed achieved at 200% of target (the "2024 Assumed PSU Awards"). The total in column 5 reflects the 2024 Assumed PSU Awards which were converted to time-based restricted stock units of Issuer and will be settled solely in shares of Issuer common stock.

Footnote F5

The total in columns 5 and 7 represents the portion of the 2024 Assumed PSU Awards held by the reporting person that, by their original terms, were to be settled in cash. At the effective time of the Merger, the 2024 Assumed PSU Awards were assumed by the Issuer and converted into an Issuer restricted stock unit that represents a conditional right to receive a cash payment equal to the closing price of Issuer common stock on the vesting date of December 31, 2026. The cash payment for the 2024 Assumed PSU Awards will be delivered to the reporting person no later than March 15, 2027.

Footnote F6

Received in the Merger in exchange for employee restricted stock units to acquire 73,874 shares of Leggett common stock. Pursuant to the terms of the Merger Agreement and at the effective time of the Merger, the Leggett restricted stock units were assumed by the Issuer and converted into the right to receive 0.1455 of Issuer restricted stock units on the same terms as initially awarded (the "2024 Assumed RSU Awards"). The total in column 5 reflects the 2024 Assumed RSU Awards which were converted to time-based restricted stock units of Issuer and will be settled solely in shares of Issuer common stock. These 2024 Assumed RSU Awards will vest on 5/20/2027.

Footnote F7

Received in the Merger in exchange for employee performance stock units to acquire 225,280 shares of Leggett common stock at target. Pursuant to the terms of the Merger Agreement and as of the effective time of the Merger, the Leggett performance stock units were assumed by the Issuer and converted into the right to receive 0.1455 of Issuer restricted stock units on the same terms as initially awarded except the performance vesting conditions were deemed achieved at 200% of target (the "2025 Assumed PSU Awards"). The total in column 5 reflects the 2025 Assumed PSU Awards which were converted to time-based restricted stock units of Issuer and will be settled solely in shares of Issuer common stock.

Footnote F8

The total in columns 5 and 7 represents the portion of the 2025 Assumed PSU Awards held by the reporting person that, by their original terms, were to be settled in cash. At the effective time of the Merger, the 2025 Assumed PSU Awards were assumed by the Issuer and converted into an Issuer restricted stock unit that represents a conditional right to receive a cash payment equal to the closing price of Issuer common stock on the vesting date of December 31, 2027. The cash payment for the 2025 Assumed PSU Awards will be delivered to the reporting person no later than March 15, 2028.

Footnote F9

Received in the Merger in exchange for employee restricted stock units to acquire 200,248 shares of Leggett common stock. Pursuant to the terms of the Merger Agreement and at the effective time of the Merger, the Leggett restricted stock units were assumed by the Issuer and converted into the right to receive 0.1455 of Issuer restricted stock units on the same terms as initially awarded (the "2025 Assumed RSU Awards"). The total in column 5 reflects the 2025 Assumed RSU Awards which were converted to time-based restricted stock units of Issuer and will be settled solely in shares of Issuer common stock. These 2025 Assumed RSU Awards will vest in approximately two equal installments on 2/28/2027 and 2/28/2028.

Footnote F10

Received in the Merger in exchange for employee performance stock units to acquire 192,176 shares of Leggett common stock at target. Pursuant to the terms of the Merger Agreement and as of the effective time of the Merger, the Leggett performance stock units were assumed by the Issuer and converted into the right to receive 0.1455 of Issuer restricted stock units on the same terms as initially awarded except the performance vesting conditions were deemed achieved at 200% of target (the "2026 Assumed PSU Awards"). The total in column 5 reflects the 2026 Assumed PSU Awards which were converted to time-based restricted stock units of Issuer and will be settled solely in shares of Issuer common stock.

Footnote F11

The total in columns 5 and 7 represents the portion of the 2026 Assumed PSU Awards held by the reporting person that, by their original terms, were to be settled in cash. At the effective time of the Merger, the 2026 Assumed PSU Awards were assumed by the Issuer and converted into an Issuer restricted stock unit that represents a conditional right to receive a cash payment equal to the closing price of Issuer common stock on the vesting date of December 31, 2028. The cash payment for the 2026 Assumed PSU Awards will be delivered to the reporting person no later than March 15, 2029.

Footnote F12

Received in the Merger in exchange for employee restricted stock units to acquire 256,235 shares of Leggett common stock. Pursuant to the terms of the Merger Agreement and at the effective time of the Merger, the Leggett restricted stock units were assumed by the Issuer and converted into the right to receive 0.1455 of Issuer restricted stock units on the same terms as initially awarded (the "2026 Assumed RSU Awards"). The total in column 5 reflects the 2026 Assumed RSU Awards which were converted to time-based restricted stock units of Issuer and will be settled solely in shares of Issuer common stock. These 2026 Assumed RSU Awards will vest in approximately three equal installments on 2/26/2027, 2/26/2028 and 2/26/2029.

Footnote F13

Received in the Merger in exchange for an employee stock option to acquire 55,051 shares of Leggett common stock, with a previous exercise price of $36.33 per share.

Footnote F14

Received in the Merger in exchange for an employee stock option to acquire 40,917 shares of Leggett common stock, with a previous exercise price of $48.88 per share.