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 2, 2020

Progenics Pharmaceuticals, Inc.

(Exact Name of Registrant as Specified in Charter)

Delaware	000-23143	13-3379479
(State or other jurisdiction of incorporation)	(Commission File Number)	(IRS Employer Identification No.)

One World Trade Center, 47th Floor, New York, New York 10007
(Address of Principal Executive Offices)	(Zip Code)

Registrant’s telephone number, including area code: (646) 975-2500

Not Applicable

(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, par value $0.0013	PGNX	The Nasdaq Stock Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2).

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 2, 2020, Progenics Pharmaceuticals, Inc. (“Progenics”) and Lantheus Holdings, Inc. (“Lantheus”) announced that they have decided to reschedule their respective special meetings of stockholders to vote on the matters related to the proposed merger of Progenics and Lantheus from April 28, 2020 to June 16, 2020. The rescheduled special meetings will allow both companies the time necessary to respond to the COVID-19 pandemic and its effect on each company’s business and on the combined entity.

A copy of the press release is attached as Exhibit 99.1 and incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits.

Exhibit No.	Document
99.1	Press release dated April 2, 2020

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.

PROGENICS PHARMACEUTICALS, INC.
By:	/s/ David W. Mims
	David W. Mims
	Interim Chief Executive Officer and Interim Chief Financial Officer

Date: April 2, 2020