8-K

INOVIO PHARMACEUTICALS, INC.

Date: April 2, 2026

/s/ Peter Kies

Peter Kies

Chief Financial Officer

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 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 1, 2026

Inovio Pharmaceuticals, Inc.

(Exact name of registrant as specified in its charter)

Delaware

001-14888

33-0969592

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

660 W. Germantown Pike Suite 110

Plymouth Meeting, PA 19462

(Address of principal executive offices, including zip code)

(267) 440-4200

(Registrant’s telephone number, including area code)

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:

☐	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

INO

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 8.01.

Other Events.

On April 1, 2026 Inovio Pharmaceuticals, Inc. (the “Company”) notified Oppenheimer & Co. Inc. (the “Sales Agent”) that it was suspending and terminating the prospectus, dated August 13, 2024 (the “ATM Prospectus”), related to the sales agreement (the “Sales Agreement”) that the Company entered into with the Sales Agent on August 13, 2024 and pursuant to which the Company may offer and sell, from time to time at its sole discretion, shares of its common stock, par value $0.001 per share (the “Common Stock”), through the Sales Agent. The Company will not make any sales of its Common Stock pursuant to the Sales Agreement unless and until a new prospectus is filed. The Sales Agreement remains in full force and effect. As of April 1, 2026, the Company had issued and sold an aggregate of 1,319,644 shares of its Common Stock under its “at-the-market” offering program with the Sales Agent for aggregate gross sale proceeds of $3.2 million, before deducting sales commissions and offering expenses.

A copy of the Sales Agreement was filed as Exhibit 1.1 to the Company’s Current Report on Form 8-K (001-14888), which was originally filed with the Securities and Exchange Commission on August 13, 2024.