Sec Form 4 Filing - LELAND D MARK @ POTLATCHDELTIC CORP - 2026-01-30

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 LELAND D MARK 2. Issuer Name and Ticker or Trading Symbol POTLATCHDELTIC CORP [ PCH] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X __ Director _____ 10% Owner _____ Officer (give title below) _____ Other (specify below) (Last) (First) (Middle) 601 W. FIRST AVENUE, SUITE 1600 3. Date of Earliest Transaction (MM/DD/YY) 01/30/2026 (Street) SPOKANE, WA99201 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 01/30/2026 D 31,114.117 D 0 D

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 LELAND D MARK 601 W. FIRST AVENUE SUITE 1600 SPOKANE, WA99201 X Signatures /s/ Michele L. Tyler, Attorney-in-Fact 02/02/2026 Signature of Reporting Person Date

Explanation of Responses:

( 1 )In connection with the terms of an Agreement and Plan of Merger, dated October 13, 2025 (as it may be amended from time to time, the "Merger Agreement"), by and among the Issuer, Rayonier Inc. ("Rayonier"), and Redwood Merger Sub, LLC, a direct, wholly owned subsidiary of Rayonier ("Merger Sub"), the Issuer merged with and into Merger Sub, with Merger Sub surviving as a direct, wholly owned subsidiary of Rayonier (the "Effective Time"). At the Effective Time, each outstanding share of Common Stock was automatically converted into the right to receive (i) 1.8185 Rayonier common shares and (ii) $0.61 in cash, without interest, plus any fractional share consideration. ( 2 )At the Effective Time, each outstanding restricted stock unit converted into a Rayonier restricted stock unit award (each, a "Rayonier RSU award"), taking into account any dividend equivalents, based on the equity award exchange ratio, as defined in the Merger Agreement, rounded to the nearest whole number of shares. Each such Rayonier RSU award will be subject to the terms of any applicable Issuer equity plan and Issuer restricted stock unit agreement in effect immediately prior to the Effective Time (including any double-trigger vesting acceleration entitlements).

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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