Sec Form 4 Filing - STREETER KENT L @ DELTIC TIMBER CORP - 2018-02-20

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 STREETER KENT L 2. Issuer Name and Ticker or Trading Symbol DELTIC TIMBER CORP [ DEL] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) Vice President Wood Products (Last) (First) (Middle) 210 E. ELM STREET 3. Date of Earliest Transaction (MM/DD/YY) 02/20/2018 (Street) EL DORADO, AR71730 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 02/20/2018( 1 ) D 22,358 ( 2 ) D $ 0 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 Common Stock $ 71.35 02/20/2018 D 607 ( 3 ) 02/20/2023 Common Stock 607 $ 0 0 D Common Stock $ 71.35 02/20/2018 D 606 ( 3 ) 02/20/2023 Common Stock 606 $ 0 0 D Common Stock $ 71.35 02/20/2018 D 606 ( 3 ) 02/20/2023 Common Stock 606 $ 0 0 D Common Stock $ 71.35 02/20/2018 D 606 ( 3 ) 02/20/2023 Common Stock 606 $ 0 0 D Common Stock $ 63.21 02/20/2018 D 655 ( 3 ) 02/19/2024 Common Stock 655 $ 0 0 D Common Stock $ 65.89 02/20/2018 D 485 ( 3 ) 02/18/2025 Common Stock 485 $ 0 0 D Common Stock $ 55.94 02/20/2018 D 482 ( 3 ) 02/17/2026 Common Stock 482 $ 0 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other STREETER KENT L 210 E. ELM STREET EL DORADO, AR71730 Vice President Wood Products Signatures Jim F. Andrews, Jr., Attorney-in-Fact for Kent L. Streeter 02/20/2018 Signature of Reporting Person Date

Explanation of Responses:

( 1 )On February 20, 2018, Deltic Timber Corporation ("Deltic"), Potlatch Corporation ("Potlatch"), and Portland Merger LLC completed the merger ("Merger") contemplated by the Agreement and Plan of Merger among such parties dated as of October 22, 2017 (the "Merger Agreement"). ( 2 )Disposed of pursuant to the Merger Agreement in which each share of Deltic common stock issued and outstanding immediately prior to the consummation of the Merger was converted into 1.8 shares of Potlatch common stock with cash paid in lieu of fractional shares. ( 3 )This option, which was vested in full as of February 20, 2018, was cancelled in exchange for an option to acquire shares of Potlatch common stock in a number of shares of Potlatch common stock equal to the product (rounded down to the nearest whole number) of (1) the number of shares of Deltic common stock subject to the Deltic Option immediately prior to the effective time of the Merger and (2) 1.80, at an exercise price per share (rounded up to the nearest whole cent) equal to (a) the exercise price per share of Deltic common stock of such Deltic Option immediately prior to the effective time of the merger divided by (b) 1.80.

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).

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