SEC Form 8-K filed by Monte Rosa Therapeutics Inc.

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): January 8, 2026

MONTE ROSA THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

321 Harrison Avenue, Suite 900

Boston, MA 02118

(Address of principal executive offices, including zip code)

(617) 949-2643

(Registrant’s telephone number, including area code)

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:

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 January 8, 2026, Monte Rosa Therapeutics, Inc. (the “Company”) entered into an Underwriting Agreement (the “Underwriting Agreement”) with Jefferies LLC, TD Securities (USA) LLC and Piper Sandler & Co., as representatives of the several underwriters listed on Schedule 1 thereto (collectively, the “Underwriters”), related to an underwritten public offering (the “Offering”) of 11,125,000 shares (the “Underwritten Shares”) of the Company’s common stock, par value $0.0001 per share (“Common Stock”), at a public offering price of $24.00 per share, and, in lieu of Common Stock to certain investors, pre-funded warrants (the “Pre-Funded Warrants”) to purchase 1,375,000 shares of Common Stock at a public offering price of $23.9999 per Pre-Funded Warrant, which represents the price per share at which shares of Common Stock are being sold to the public in this offering, minus $0.0001, which is the exercise price of each Pre-Funded Warrant. In addition, the Company has granted the Underwriters an option, exercisable in whole or in part at any time for a period of 30 days from the date of the Underwriting Agreement, to purchase, at the public offering price, less the underwriting discounts and commissions, up to an additional 1,875,000 shares of Common Stock (such shares, together with the Underwritten Shares, the “Shares”).

The Company estimates that the net proceeds from the Offering, after deducting the underwriting discounts and commissions and estimated offering expenses payable by the Company, will be approximately $281.6 million, excluding any proceeds from exercise of the underwriters’ option to purchase additional shares. The Company may receive nominal proceeds, if any, from the exercise of the Pre-Funded Warrants. The Company intends to use the net proceeds from the Offering, together with its existing cash, cash equivalents, and marketable securities, to fund advancement of MRT-8102 in chronic inflammatory diseases including atherosclerotic cardiovascular disease and for continued development of its QuEEN^TM platform and its utilization to identify and develop additional molecular glue degraders against therapeutic targets including immunology and inflammation and oncology targets, and for working capital and other general corporate purposes. The Offering is expected to close on or about January 12, 2026, subject to the satisfaction of customary closing conditions.

The exercise price and the number of shares of Common Stock, or any other class or series of common stock then in effect, including, but not limited to, non-voting common stock, issuable upon exercise of each Pre-Funded Warrant are subject to appropriate adjustments in the event of certain stock dividends and distributions, stock splits, stock combinations, reclassifications or similar events affecting the Common Stock or such other class or series. The Pre-Funded Warrants are exercisable from the date of issuance and do not expire. Each Pre-Funded Warrant is exercisable, in the holder’s discretion, by delivery to the Company of an exercise notice along with (i) payment in full in immediately available funds for the number of shares of Common Stock purchased upon exercise, or (ii) a cashless exercise, in which case the holder would receive upon such exercise the net number of shares of Common Stock determined according to the formula set forth in the Pre-Funded Warrant. Under the Pre-Funded Warrants, the Company may not effect the exercise of any Pre-Funded Warrants, and a holder will not be entitled to exercise any portion of any Pre-Funded Warrant that, upon giving effect to such exercise, would result in: (i) the aggregate number of shares of Common Stock beneficially owned by such holder (together with its affiliates) to exceed 4.99% (or, at the election of the holder, up to 19.99%) of the number of shares of Common Stock outstanding immediately after giving effect to the exercise, or (ii) the combined voting power of the Company’s securities beneficially owned by such holder (together with its affiliates) to exceed 4.99% (or, at the election of the holder, up to 19.99%) of the combined voting power of all of the Company’s securities then outstanding immediately after giving effect to the exercise, as such percentage ownership is determined in accordance with the terms of the pre-funded warrants, which percentage may be changed at the holder’s election to a higher or lower percentage not in excess of 19.99% upon at least 61 days’ notice to the Company.

In the event of a Fundamental Transaction (as defined in the Pre-Funded Warrants), a holder of Pre-Funded Warrants will be entitled to receive, upon exercise of the Pre-Funded Warrants, the kind and amount of securities, cash or other property that such holder would have received had they exercised the Pre-Funded Warrants immediately prior to such Fundamental Transaction without regard to any limitations on exercise contained in the Pre-Funded Warrants.

The Company made certain customary representations, warranties and covenants concerning the Company and the registration statement in the Underwriting Agreement and also agreed to indemnify the Underwriters against certain liabilities, including liabilities under the Securities Act of 1933, as amended (the “Securities Act”). The Offering is being made pursuant to the Company’s shelf registration statement on Form S-3 (File No. 333-285942), filed with the U.S. Securities and Exchange Commission (the “SEC”) on March 20, 2025 and declared effective by the SEC on March 31, 2025. This Current Report on Form 8-K does not constitute an offer to sell or a solicitation of an offer to buy any of the shares of Common Stock or the Pre-Funded Warrants.

The foregoing description of certain terms of the Underwriting Agreement and the transactions contemplated thereby does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Underwriting Agreement, which is filed as Exhibit 1.1 to this Current Report on Form 8-K and is incorporated by reference herein.

The foregoing description of certain terms of the form of Pre-Funded Warrant does not purport to be a complete statement of the rights and obligations of the parties thereto and the transactions contemplated thereby, and is qualified in its entirety by reference to the form of Pre-Funded Warrant, which is filed as Exhibit 4.1 to this Current Report on Form 8-K and is incorporated by reference herein.

A copy of the legal opinion of Goodwin Procter LLP, relating to the legality of the issuance and sale of shares of Common Stock and the Pre-Funded Warrants in the Offering, is filed as Exhibit 5.1 to this Current Report on Form 8-K and is incorporated by reference herein.

On January 8, 2026, the Company issued a press release announcing that it had priced the Offering. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated by reference herein.

As a result of the Offering, the Company expects its cash and cash equivalents to be sufficient to fund planned operations and capital expenditures into 2029.

Cautionary Note Regarding Forward Looking Statements

This Current Report on Form 8-K contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, as amended, including, without limitation, statements about the Company’s expectations regarding the timing and closing of the Offering. The words “may,” “might,” “will,” “could,” “would,” “should,” “expect,” “plan,” “anticipate,” “intend,” “believe,” “expect,” “estimate,” “seek,” “predict,” “future,” “project,” “potential,” “continue,” “target” and similar words or expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Any forward-looking statements contained in this Current Report on Form 8-K, such as those related to the anticipated closing of the Offering and the potential exercise of the Pre-Funded Warrants, are based on management’s current expectations and beliefs and are subject to a number of risks, uncertainties and important factors that may cause actual events or results to differ materially from those expressed or implied by any forward-looking statements contained in this Current Report on Form 8-K, including, without limitation, uncertainties related to market conditions and the satisfaction of customary closing conditions related to the Offering. These and other risks and uncertainties are described in greater detail in the section entitled “Risk Factors” in the Company’s most recent Annual Report on Form 10-K for the year ended December 31, 2024, as well as the most recent Quarterly Reports on Form 10-Q and any subsequent filings with the SEC. In addition, any forward-looking statements represent the Company’s views only as of today and should not be relied upon as representing its views as of any subsequent date. The Company explicitly disclaims any obligation to update any forward-looking statements. No representations or warranties (expressed or implied) are made about the accuracy of any such forward-looking statements.

(d) Exhibits

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.