8-K

MERRIMACK PHARMACEUTICALS, INC.

Date: November 3, 2022

/s/ Gary L. Crocker

Gary L. Crocker

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): November 3, 2022

Merrimack Pharmaceuticals, Inc.

(Exact Name of Registrant as Specified in its Charter)

Delaware

001-35409

04-3210530

(State or Other Jurisdiction

of Incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

One Broadway, 14th Floor

Cambridge, MA 02142

(Address of Principal Executive Offices)

Registrant’s telephone number, including area code: (617) 720-8606

(Former Name or Former Address, if Changed Since Last Report)

Securities registered under Section 12(b) of the Exchange Act:

Title of Class

Trading

Symbol

Name of Exchange

on Which Registered

Class A common stock,

$0.01 par value per share

MACK

The Nasdaq Stock Market LLC

(NASDAQ Global Market)

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):

☐

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:

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 7.01

REGULATION FD DISCLOSURE

On November 3, 2022, Merrimack Pharmaceuticals, Inc. (the “Company”) issued a press release announcing its financial results for the third quarter of 2022, as well as certain updates on programs underlying potential milestone payments to the Company. The full text of the press release is attached to this Current Report on Form 8-K as Exhibit 99.1. The press release was also simultaneously filed on the Company’s website. The information in this Item 7.01 of this Current Report on Form 8-K and Exhibit 99.1 shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, or incorporated by reference in any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except as shall be expressly set forth by specific reference in such filing.

ITEM 9.01

FINANCIAL STATEMENTS AND EXHIBITS.

(d)	Exhibits. The Exhibit Index set forth below is incorporated herein by reference.

EXHIBIT INDEX


Exhibit Number		Exhibit Title

99.1		Press Release issued by Merrimack Pharmaceuticals, Inc. on November 3, 2022.

104		Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

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.

Merrimack Pharmaceuticals Inc. filed SEC Form 8-K: Regulation FD Disclosure, Financial Statements and Exhibits