 MOUNTAIN VIEW, Calif., Dec. 08, 2020 GLOBE NEWSWIRE -- IGM Biosciences, Inc. NASDAQ: IGMS IGM today announced the pricing of its upsized underwritten public offering of shares of its common stock at a price to the public of 90.00 per share and, to certain investors in lieu of common stock, pre-funded warrants to purchase shares of its common stock at a purchase price of 89.99 per each pre-funded warrant, which represents the per share public offering price of common stock less the 0.01 per share exercise price for each such pre-funded warrant. IGM expects to receive total gross proceeds of approximately 200 million from this offering, before deducting the underwriting discounts and commissions and estimated offering expenses payable by IGM. In addition, IGM has granted the underwriters a 30-day option to purchase up to an additional 30.0 million of 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 will be sold by IGM. The offering is expected to close on or about December 11, 2020, subject to satisfaction of customary closing conditions. 