Board-approved transferable rights offering grants one right per share held as of 5:00 p.m. ET on March 27, 2026; five rights purchase one new share (basic subscription). Subscription price set at $59.00 per share, approximately a 12% discount to the five-day VWAP ending on and including the Record Date. Up to 713,362 new common shares are issuable; an aggregate of 3,566,812 rights are being registered (one per share outstanding on the Record Date). Maximum gross proceeds, if fully subscribed, are approximately $42.09 million (713,362 shares × $59.00). Rights are transferable and trade on NYSE American under symbol MPTI RT, expected to begin March 31, 2026 and cease at market close April 14, 2026. Oversubscription privilege allows fully participating Record Date stockholders to request additional shares, subject to proration. Rights offering expires at 5:00 p.m. ET on April 15, 2026, unless extended; no fractional rights or shares will be issued (rounded down). Company may terminate the offering at any time prior to expiration; there is no assurance stockholders will exercise rights. Computershare is Subscription Agent; Georgeson LLC is Information Agent (toll-free: 866-539-6575).