Sec Form 4 Filing - Grissett Russell K @ SEALED AIR CORP/DE - 2026-04-09

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Grissett Russell K 2. Issuer Name and Ticker or Trading Symbol SEALED AIR CORP/DE [ SEE] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) President, Food (Last) (First) (Middle) C/O SEALED AIR CORPORATION, 2415 CASCADE POINTE BOULEVARD 3. Date of Earliest Transaction (MM/DD/YY) 04/09/2026 (Street) CHARLOTTE, NC28208 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 04/09/2026 D 40,228 D 0 D Common Stock 04/09/2026 D 502 ( 3 ) D 0 I 401k & Profit Sharing Plan

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Grissett Russell K C/O SEALED AIR CORPORATION 2415 CASCADE POINTE BOULEVARD CHARLOTTE, NC28208 President, Food Signatures /s/ Kristina Johnson, attorney-in-fact 04/09/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )In connection with the terms of an Agreement and Plan of Merger, dated November 16, 2025 (the "Merger Agreement"), by and among the Issuer, Sword Purchaser, LLC ("Sword") and Sword Merger Sub, Inc., a wholly owned subsidiary of Sword ("Merger Sub"), Merger Sub merged with and into the Issuer, with the Issuer surviving (the "Surviving Corporation") as a wholly owned subsidiary of Sword (the "Effective Time"). At the Effective Time, each outstanding share of Common Stock was cancelled and extinguished and automatically converted into the right to receive $42.15 (the "Merger Consideration"), without interest, except as set forth in the Merger Agreement. ( 2 )At the Effective Time, each restricted stock unit ("RSU") outstanding immediately prior to the Effective Time was automatically cancelled and terminated and converted into a contingent right to receive from the Surviving Corporation an amount in cash (without interest) equal to (i) the product of (A) the aggregate number of shares of Common Stock underlying such RSU and (B) the Merger Consideration, plus (ii) any accrued and unpaid dividends or dividend equivalent rights owed with respect to such RSU, with such cash-based award subject to the terms and conditions applicable to the corresponding RSU (including time-based vesting conditions and terms related to the treatment upon termination of employment). ( 3 )Total number of shares of Common Stock held in the name of the reporting person under the Sealed Air Corporation 401(k) and Profit-Sharing Plan as of the Effective Time.

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).

** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).

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