8-K

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): January 30, 2024

Arcellx, Inc.

(Exact name of Registrant as Specified in Its Charter)

Delaware	001-41259	47-2855917
(State or Other Jurisdiction of Incorporation)	(Commission File Number)	(IRS Employer Identification No.)

800 Bridge Parkway

Redwood City, CA 94065

(Address of principal executive offices, including zip code)

(240) 327-0603

(Registrant’s telephone number, including area code)

25 West Watkins Mill Road, Suite A

Gaithersburg, MD 20878

(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:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

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

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common Stock, $0.001 par value per share	ACLX	The Nasdaq Stock Market LLC

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 1.02 Termination of a Material Definitive Agreement.

On January 30, 2024, Arcellx, Inc. (the “Company”) entered into an Assignment of Lease (the “Assignment”) with a third party sublessee, pursuant to which the Company agreed to transfer and assign to a sublessee all of its rights, title, and interest under that certain Lease Agreement, dated October 5, 2018, between TFG West Watkins Property, LLC and the Company, as amended (the “Lease”). The Lease relates to the premises located at 25 West Watkins Mill Road, Gaithersburg, MD, which is Company’s current headquarters.

In connection with the Assignment, the Company’s board of directors approved the relocation of the Company’s headquarters to its already occupied office space located at 800 Bridge Parkway, Redwood City, CA 94065, effective as of January 30, 2024.

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 hereunto duly authorized.

		ARCELLX, INC.
Date: January 31, 2024	By:	/s/ Rami Elghandour
		Rami Elghandour Chief Executive Officer

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Document and Entity Information	Jan. 30, 2024
Document And Entity Information [Line Items]
Document Type	8-K
Document Period End Date	Jan. 30, 2024
Entity Registrant Name	Arcellx, Inc.
Entity Incorporation State Country Code	DE
Entity File Number	001-41259
Entity Tax Identification Number	47-2855917
Entity Address Address Line 1	800 Bridge Parkway
Entity Address City Or Town	Redwood City
Entity Address State Or Province	CA
Entity Address Postal Zip Code	94065
City Area Code	240
Local Phone Number	327-0603
Written Communications	false
Soliciting Material	false
Pre Commencement Tender Offer	false
Pre Commencement Issuer Tender Offer	false
Security 12b Title	Common Stock, $0.001 par value per share
Trading Symbol	ACLX
Security Exchange Name	NASDAQ
Entity Emerging Growth Company	false
Entity Central Index Key	0001786205
Amendment Flag	false
Former Address [Member]
Document And Entity Information [Line Items]
Entity Address Address Line 1	25 West Watkins Mill Road
Entity Address Address Line 2	Suite A
Entity Address City Or Town	Gaithersburg
Entity Address State Or Province	MD
Entity Address Postal Zip Code	20878