UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): April 15, 2024

Longboard Pharmaceuticals, Inc.

(Exact name of Registrant as Specified in Its Charter)

Registrant’s Telephone Number, Including Area Code: (858) 789-9283

N/A

(Former Name or Former Address, if Changed Since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 7.01 Regulation FD Disclosure.

Included as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference is a poster titled “Efficacy and Safety of Bexicaserin (LP352) in Adolescent and Adult Participants with Developmental and Epileptic Encephalopathies: Results of the Phase 1b/2a PACIFIC Study” (the “Poster”). Longboard Pharmaceuticals, Inc. (the “Company”) is scheduled to present the Poster at the 76th Annual Meeting of the American Academy of Neurology on April 15, 2024. The Company also expects to use the contents of the Poster in various meetings and presentations with securities analysts, investors and others beginning on April 15, 2024.

The Company also plans to make the Poster available on its website (http://www.longboardpharma.com), on the page titled “Our Approach,” under the heading “Publications.”

Information contained in, or that can be accessed through, the Company’s website is not incorporated by reference into this Current Report on Form 8-K. The information contained in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that Section, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Securities Exchange Act of 1934, as amended, except as shall be expressly stated by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits. (d) Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.