Allogene Therapeutics Inc — Current Report (Form 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): April 14, 2026

Allogene Therapeutics, Inc.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (650) 457-2700

(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 (see General Instruction A.2. below):

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. ☐

On April 14, 2026, we entered into an underwriting agreement (the “Underwriting Agreement”) with Goldman Sachs & Co. LLC, Jefferies LLC and TD Securities (USA) LLC, as representatives of the several underwriters named therein (collectively, the “Underwriters”), relating to the issuance and sale in a public offering of 87,500,000 shares of our common stock, par value $0.001 per share. The price to the public in the offering is $2.00 per share. The gross proceeds to us from the offering are expected to be approximately $175.0 million, before deducting the underwriting discounts and commissions and estimated offering expenses payable by us. The closing of the offering is expected to occur on April 16, 2026, subject to the satisfaction of customary closing conditions. In addition, we granted the Underwriters a 30-day option to purchase up to 13,125,000 additional shares of our common stock at the public offering price, less the underwriting discounts and commissions.

We expect to use the net proceeds from this offering for general corporate purposes, which may include clinical trial expenses, research and development expenses, general and administrative expenses, and capital expenditures.

The Underwriting Agreement contains customary representations, warranties and agreements by us, customary conditions to closing, indemnification obligations of us and the Underwriters, including for liabilities under the Securities Act of 1933, as amended, other obligations of the parties and termination provisions. The representations, warranties and covenants contained in the Underwriting Agreement were made only for purposes of such agreement and as of specific dates, were solely for the benefit of the parties to such agreement, and may be subject to limitations agreed upon by such parties.

The offering is being made pursuant to our effective registration statement on Form S-3 and accompanying prospectus (Registration Statement No. 333-277951), previously filed with the Securities and Exchange Commission (“SEC”), and a prospectus supplement thereunder. A copy of the Underwriting Agreement is filed as Exhibit 1.1 to this report, and the foregoing description of the terms of the Underwriting Agreement does not purport to be complete and is qualified in its entirety by reference to such exhibit. A copy of the opinion of Cooley LLP relating to the legality of the issuance and sale of the shares in the offering is attached as Exhibit 5.1 hereto.

On April 13, 2026, we issued a press release announcing the commencement of the offering. On April 14, 2026, we issued a press release announcing that we had priced the offering. Copies of these press releases are attached as Exhibits 99.1 and 99.2 hereto, respectively.

Forward-Looking Statements

Certain statements in this report are forward-looking statements that involve a number of risks and uncertainties. These statements may be identified by introductory words such as “may,” “expects,” “goal,” “intend,” “will,” “would,” “subject to” or words of similar meaning, or by the fact that they do not relate strictly to historical or current facts. Such forward-looking statements include statements regarding our expectations with respect to the completion, timing and size of the public offering, and the use of proceeds from the offering. For such statements, we claim the protection of the Private Securities Litigation Reform Act of 1995. Actual events or results may differ materially from our expectations. Factors that could cause actual results to differ materially from the forward-looking statements include, but are not limited to, risks and uncertainties associated with market conditions and the satisfaction of customary closing conditions related to the offering, and those factors disclosed in our filings with the SEC, including our Annual Report on Form 10-K for the year ended December 31, 2025, filed with the SEC on March 12, 2026, and other filings that we may make from time to time with the SEC. These forward-looking statements represent our judgment as of the time of this release. We disclaim any intent or obligation to update these forward-looking statements, other than as may be required under applicable law.

(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 hereunto duly authorized.

Dated: April 15, 2026