Miami International Holdings Inc. (MIAX) saw its stock price plummet 5.25% during intraday trading on Monday, following news of significant share issuance that raised concerns about dilution among investors.

The decline came after the company disclosed it had issued over 1.03 million shares of common stock through the cashless exercise of pre-funded warrants and warrants held by two holders between February 18 and February 25, 2026. This substantial increase in shares outstanding typically dilutes existing shareholders' ownership and can put downward pressure on stock prices.

The issuance included 842,531 shares in exchange for the surrender of 44 shares and 190,635 shares in exchange for the surrender of 29,360 shares tied to warrants with a $5.50 exercise price. The company stated the shares were issued in reliance on the Section 4(a)(2) private offering exemption, which allows for unregistered sales in private transactions.