Sec Form 4 Filing - Lynch Casey @ Longboard Pharmaceuticals, Inc. - 2024-12-02

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 Lynch Casey 2. Issuer Name and Ticker or Trading Symbol Longboard Pharmaceuticals, Inc. [ LBPH] 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) C/O LONGBOARD PHARMACEUTICALS, INC., 4275 EXECUTIVE SQUARE, SUITE 950 3. Date of Earliest Transaction (MM/DD/YY) 12/02/2024 (Street) LA JOLLA, CA92037 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

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 Employee Stock Option (right to buy) $ 16 12/02/2024( 1 ) D 12,367 ( 2 ) 03/10/2031 Common Stock 12,367 ( 2 ) 0 D Employee Stock Option (right to buy) $ 16 12/02/2024( 1 ) D 14,428 ( 2 ) 03/10/2031 Common Stock 14,428 ( 2 ) 0 D Employee Stock Option (right to buy) $ 4.4 12/02/2024( 1 ) D 12,367 ( 2 ) 05/23/2032 Common Stock 12,367 ( 2 ) 0 D Employee Stock Option (right to buy) $ 7.06 12/02/2024( 1 ) D 12,500 ( 2 ) 05/24/2033 Common Stock 12,500 ( 2 ) 0 D Employee Stock Option (right to buy) $ 18.94 12/02/2024( 1 ) D 22,500 ( 2 ) 05/22/2034 Common Stock 22,500 ( 2 ) 0 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Lynch Casey C/O LONGBOARD PHARMACEUTICALS, INC. 4275 EXECUTIVE SQUARE, SUITE 950 LA JOLLA, CA92037 X Signatures /s/ Andrew J. Cronauer, Attorney-in-Fact 12/02/2024 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Pursuant to the Agreement and Plan of Merger (the "Merger Agreement"), dated as of 10/14/2024, by and among Longboard Pharmaceuticals, Inc. (the "Issuer"), H. Lundbeck A/S ("Parent"), Lundbeck LLC ("Payor"), and Langkawi Corporation ("Purchaser"), on 12/02/2024, Purchaser completed a tender offer for shares of common stock of the Issuer (each, a "Share") and thereafter merged with and into the Issuer, with the Issuer continuing as the surviving corporation and an indirect wholly owned subsidiary of Parent (the "Merger"). ( 2 )On such date and at such time as the certificate of merger in respect of the Merger was duly filed with the Secretary of State of the State of Delaware in accordance with the DGCL (the "Effective Time"), pursuant to the Merger Agreement, each outstanding option, to the extent unvested, was accelerated and became fully vested and exercisable. Each outstanding and unexercised vested option (after giving effect to the acceleration treatment set forth in the preceding sentence) at the Effective Time was cancelled and automatically converted into the right to receive cash, without interest, in an amount equal to the product of (i) the total number of Shares subject to such option as of immediately prior to the Effective Time multiplied by (ii) the excess of (x) $60.00 per Share over (y) the exercise price payable per Share under such option, which amount will be subject to any withholding taxes.

Remarks: The foregoing descriptions in the footnotes to this Form 4 are qualified in their entirety by reference to the terms of the Merger Agreement. In the event of any conflict between the descriptions above and the terms set forth in the Merger Agreement, the terms set forth in the Merger Agreement shall control.

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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