X0202 SCHEDULE 13G 0002142559 XXXXXXXX LIVE Common stock, par value $0.0001 per share 06/05/2026 0001850351 Liftoff Mobile, Inc. 53229X101 900 Middlefield Road Redwood City CA 94063 Rule 13d-1(d) Robertson Harry James X1 9663735 0 9663735 0 9663735 5.7 IN The percent of class reported in row 9 is based on an aggregate of 169,330,527 shares of common stock reported by the Company to be outstanding as reflected in the Company's prospectus filed under Rule 424(b)(4) filed with the U.S. Securities and Exchange Commission (the "SEC") on June 4, 2026, after giving effect to the IPO (including the exercise in full of the underwriters' over-allotment option as announced by the Company on June 5, 2026). Liftoff Mobile, Inc. 900 Middlefield Road, Redwood City, CA 94063 Harry James Robertson c/o Liftoff Mobile, Inc. 900 Middlefield Road Redwood, City, California, 94063 United States Y 9,663,735 5.7 9,663,735 0 9,663,735 0 Y Y Y Y Y Y Robertson Harry James /s/ Harry James Robertson 07/15/2026