On December 2, 2021 ImmunoGen Inc. (Nasdaq: IMGN), a leader in the expanding field of antibody-drug conjugates (ADCs) for the treatment of cancer, reported the pricing of an underwritten public offering of 11,636,364 shares of its common stock at a price of $6.60 per share, before underwriting discounts and commissions, and to certain investors in lieu of common stock, pre-funded warrants to purchase up to an aggregate of 27,363,636 shares of its common stock at a price of $6.59, which represents the per share public offering price for the common stock less the $0.01 per share exercise price for each such pre-funded warrant (Press release, ImmunoGen, DEC 2, 2021, View Source [SID1234596389]). The offering is expected to close on or about December 6, 2021, subject to satisfaction of customary closing conditions. ImmunoGen also granted the underwriters a 30-day option to purchase up to an additional 5,850,000 shares of its common stock at the public offering price, less underwriting discounts and commissions. All of the shares of common stock and pre-funded warrants in the offering are to be sold by ImmunoGen.

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ImmunoGen anticipates the total gross proceeds from the offering (before deducting the underwriting discounts and estimated offering expenses) will be $257.1 million, excluding any exercise of the underwriters’ option to purchase additional shares.

ImmunoGen intends to use the net proceeds of the offering to fund its operations, including, but not limited to, commercialization activities, clinical trial activities, supply of drug product, business development activities, capital expenditures, and working capital.

Jefferies, Cowen, and Guggenheim Securities are acting as joint book-running managers for the proposed offering. Canaccord Genuity is acting as lead manager for the proposed offering.

The securities described above are being offered by ImmunoGen pursuant to a shelf registration statement that was previously filed with the Securities and Exchange Commission (SEC) and became effective upon filing. This press release does not constitute an offer to sell or a solicitation of an offer to buy the securities in this offering, nor shall there be any sale of these securities in any state or other jurisdiction in which such offer, solicitation, or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or other jurisdiction. A preliminary prospectus supplement and accompanying prospectus relating to the offering was filed with the SEC and is available on the SEC’s website at www.sec.gov. Copies of the final prospectus supplement and the accompanying prospectus relating to this offering may be obtained by contacting Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, 2nd Floor, New York, NY 10022, by e-mail at [email protected] or by telephone at (877) 821-7388; Cowen and Company, LLC c/o Broadridge Financial Solutions, Attention: Prospectus Department, 1155 Long Island Avenue, Edgewood, NY,11717, by email at [email protected] or by telephone at (833) 297-2926; or Guggenheim Securities, LLC, Attention: Equity Syndicate Department, 330 Madison Avenue, 8th Floor, New York, NY 10017, or by email at [email protected] or by telephone at (212) 518-9544.