Atara Biotherapeutics Inc. filed SEC Form 8-K: Costs Associated with Exit or Disposal Activities

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

Atara Biotherapeutics, Inc.

(Exact name of Registrant as Specified in Its Charter)

(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 2.05 Costs Associated with Exit or Disposal Activities.

On May 12, 2025, Atara Biotherapeutics, Inc. (the “Company”) announced a reduction in its workforce that will impact approximately 30% of its current employees, retaining approximately 23 employees essential to executing on the Company’s strategic priorities. The Company expects to complete the workforce reduction by August 2025. The Company expects to recognize approximately $1.4 million for severance and related benefits for employees laid off under the reduction in force. These charges are primarily one-time termination benefits and are primarily cash charges. The Company may also incur other charges or cash expenditures not currently contemplated due to events that may occur as a result of, or associated with, the workforce reduction. Additional details will be provided in the Company’s Quarterly Report on Form 10-Q for the period ending June 30, 2025.

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.