0000950142-24-001424.txt : 20240524 0000950142-24-001424.hdr.sgml : 20240524 20240524164757 ACCESSION NUMBER: 0000950142-24-001424 CONFORMED SUBMISSION TYPE: 3 PUBLIC DOCUMENT COUNT: 2 CONFORMED PERIOD OF REPORT: 20240524 FILED AS OF DATE: 20240524 DATE AS OF CHANGE: 20240524 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Lappe Mark CENTRAL INDEX KEY: 0001366074 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 3 SEC ACT: 1934 Act SEC FILE NUMBER: 001-42031 FILM NUMBER: 24985201 MAIL ADDRESS: STREET 1: 11622 EL CAMINO REAL STREET 2: SUITE 100 CITY: SAN DIEGO STATE: CA ZIP: 92130 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Inhibrx Biosciences, Inc. CENTRAL INDEX KEY: 0002007919 STANDARD INDUSTRIAL CLASSIFICATION: BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES) [2836] ORGANIZATION NAME: 03 Life Sciences IRS NUMBER: 990613523 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 11025 N. TORREY PINES ROAD, SUITE 140 CITY: LA JOLLA STATE: CA ZIP: 92037 BUSINESS PHONE: (858) 795-4220 MAIL ADDRESS: STREET 1: 11025 N. TORREY PINES ROAD, SUITE 140 CITY: LA JOLLA STATE: CA ZIP: 92037 FORMER COMPANY: FORMER CONFORMED NAME: Ibex SpinCo, Inc. DATE OF NAME CHANGE: 20240111 3 1 es240464228_3-lappe.xml OWNERSHIP DOCUMENT X0206 3 2024-05-24 1 0002007919 Inhibrx Biosciences, Inc. INXB 0001366074 Lappe Mark C/O INHIBRX BIOSCIENCES, INC. 11025 NORTH TORREY PINES ROAD, SUITE 140 LA JOLLA CA 92037 1 1 0 0 Chief Executive Officer Exhibit 24.1 - Power of Attorney /s/ Kelly D. Deck, Chief Financial Officer of Inhibrx Biosciences, Inc., as attorney-in-fact 2024-05-24 EX-24.1 2 es240464228_ex2401.htm EXHIBIT 24.1

EXHIBIT 24.1

POWER OF ATTORNEY

Know all by these presents, that the undersigned hereby constitutes and appoints each of the Chief Financial Officer of Inhibrx Biosciences, Inc. (the "Company"), the General Counsel of the Company and Jeremy D. Glaser, Melanie R. Levy, Nadia Do Canto and Jessica Zhang of Mintz, Levin, Cohn, Ferris, Glovsky and Popeo, P.C., signing singly, with full power of substitution, the undersigned's true and lawful attorney-in-fact to:

(1) execute for and on behalf of the undersigned, in the undersigned's capacity as a director or executive officer of the Company, as applicable, forms and authentication documents for EDGAR Filing Access;

(2) do and perform any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such forms and authentication documents;

(3) execute for and on behalf of the undersigned, in the undersigned's capacity as a director or executive officer of the Company, Forms 3, 4 and 5 in accordance with Section 16(a) of the Securities Exchange Act of 1934, as amended, and the rules thereunder;

(4) do and perform any and all acts for and on behalf of the undersigned that may be necessary or desirable to complete and execute any such Form 3, 4 or 5 and timely file such form with the United States Securities and Exchange Commission and any stock exchange or similar authority; and

(5) take any other action of any type whatsoever in connection with the foregoing that, in the opinion of such attorney-in-fact, may be of benefit to, in the best interests of, or legally required by the undersigned, it being understood that the documents executed by such attorney-in-fact on behalf of the undersigned pursuant to this Power of Attorney shall be in such form and shall contain such terms and conditions as such attorney-in-fact may approve in such attorney-in-fact's discretion.

The undersigned hereby grants to each such attorney-in-fact full power and authority to do and perform any and every act and thing whatsoever requisite, necessary, or proper to be done in the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as the undersigned might or could do if personally present, with full power of substitution or revocation, hereby ratifying and confirming all that such attorney-in-fact, or such attorney-in-fact's substitute or substitutes, shall lawfully do or cause to be done by virtue of this power of attorney and the rights and powers herein granted. The undersigned acknowledges that the foregoing attorneys-in-fact, in serving in such capacity at the request of the undersigned, are not assuming, nor is the Company assuming, any of the undersigned's responsibilities to comply with Section 16 of the Securities Exchange Act of 1934, as amended.

This Power of Attorney is effective as of the date executed, revokes all prior Powers of Attorney relating to reporting under Section 16 of the Securities Exchange Act of 1934 of the Company’s securities and the matters outlined above and shall remain in full force and effect until the undersigned is no longer required to file Forms 3, 4 and 5 with respect to the undersigned's holdings of and transactions in securities issued by the Company, unless earlier revoked by the undersigned in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to be executed this 24th day of May, 2024.

/s/ Mark P. Lappe
Signature

Name: Mark P. Lappe