 MOUNTAIN VIEW, Calif., Dec. 11, 2020 GLOBE NEWSWIRE -- IGM Biosciences, Inc. NASDAQ: IGMS IGM today announced the closing of its upsized underwritten public offering of 1,221,224 shares of its common stock, which includes the exercise of the underwriters option to purchase additional shares in full, and pre-funded warrants to purchase 1,334,332 shares of its common stock. The public offering price of common stock was 90.00 per share and the public offering price of each pre-funded warrant was 89.99, with each pre-funded warrant having an exercise price of 0.01. The aggregate gross proceeds to IGM from the offering were approximately 230 million, before deducting the underwriting discounts and commissions and other offering expenses payable by IGM. 