SCHEDULE 13G 0001997166 XXXXXXXX LIVE common stock 09/30/2025 0000793524 RESEARCH FRONTIERS INC 760911107 240 CROSSWAYS PARK DR WOODBURY NY 11797-2033 Rule 13d-1(c) Morgan Stephen L. WI 2328690.00 0.00 2328690.00 0.00 2328690.00 6.9 IN RESEARCH FRONTIERS INC 240 CROSSWAYS PARK DR, WOODBURY, NEW YORK, 11797-2033 John F. Nelson 3610 Deerpath Road Middleton, WI 53562 United States Y 2,328,690 6.920692 2,328,690(1,224,403 owned in personal account and 1,104,287 owned in self-directed IRA account) 0 2,328,690 0 Y N Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Morgan Stephen L. Stephen L. Morgan 10/17/2025