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 eventreported): March 27, 2020

ACTINIUMPHARMACEUTICALS, INC.

(Exact name of registrant as specifiedin its charter)

275 Madison Avenue, 7^th^Floor, New York, NY 10016

(Address of Principal Executive Offices)

Registrant’s telephone number:(646) 677-3870

(Former name or former address, if changedsince 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. ☐

Actinium Pharmaceuticals, Inc. (the “Company”) will be relying on the Securities and Exchange Commission’s Order under Section 36 of the Securities Exchange Act of 1934 Granting Exemptions From Specified Provisions of the Exchange Act and Certain Rules Thereunder dated March 4, 2020 (Release No. 34-88318) (the “Order”) to delay the filing of its Annual Report on Form 10-K for the year ended December 31, 2019 (the “Report”) due to the circumstances related to COVID-19. In particular, COVID-19 has caused severe disruptions in transportation and limited access to the Company’s facility, resulting in limited support from its staff and professional advisors. This has, in turn, delayed the Company’s ability to complete its audit and prepare the Report. Notwithstanding the foregoing, the Company expects to file the Report no later than May 14, 2020 (which is 45 days from the Report’s original filing deadline of March 30, 2020) and in compliance with the exemptions granted under the Order.

In light of the current COVID-19 pandemic, the Company will be including the following Risk Factor into its Report:

An occurrence of an uncontrollable event such as the COVID-19pandemic is likely to negatively affect our operations.

The occurrence of an uncontrollable event such as the COVID-19 pandemic is likely to negatively affect our operations. A pandemic typically results in social distancing, travel bans and quarantine, and this would result in limited access to our facility, management, support staff and professional advisors. These, in turn, will not only impact our operations and financial condition, but our overall ability to react timely to mitigate the impact of this event. Also, it will substantially hamper our efforts to provide our investors with timely information and comply with our filing obligations with the Securities and Exchange Commission.

1

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.

2