Research Frontiers Incorporated said it has entered into subscription agreements with a group of private accredited investors for a private placement of 1.1 million shares of common stock at $1.00 per share, raising $1.1 million in gross proceeds. Each share was issued with a warrant to buy an additional share through Feb. 28, 2031, with the exercise price stepping up from $1.10 to $1.50 over time. The shares and any shares issued upon warrant exercise are unregistered and subject to at least a six-month holding period.

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