ProSomnus SPAC Presentation Deck

We Believe That ProSomnus is the Only Therapy That Meets AASM Gold Standard for Adherence ProSomnus devices are biomechanically designed to address CPAP's limitations on adherence, leading to a 61% better mean nightly use in clinical studies4 ADHERENCE - HOURS WORN PROSOMNUS SLEEP TECHNOLOGIES CPAP Upper Airway Stimulation 5. 6. Legacy OAT 1 2 3 4 4.5 Hours AASM "Gold Standard" 7 hours5 N/A There is no objective data utilizing FDA cleared sensors to support adherence rates for Legacy OAT Experimental data suggests 6.4 hours 61% 5.7 Hours 7.2 Hours 1. Stern, J. Efficacy and Effectiveness. Annual Meeting of the AADSM, 2018 Jun 2. Dieltjens M, Vanderveken O. Oral Appliances in Obstructive Sleep Apnea. Healthcare (Basel). 2019 Nov 8. Cites 56% compliance for CPAP users. Estimated hours worn based on assumed 8-hour night. 3. Thaler et al. Results of the ADHERE UAS Registry. Laryngoscope (130) 2020 4. Dieltjens M, et al. Objectively Measured vs. Self-Reported Compliance 2013 Nov Gold Standard defined as usage of the device for a minimum of 7 hours per night, based on AASM's recommendation of 7 or more hours of sleep per night for adults ProSomnus EVO IRB survey. AASM Scientific Abstract Presentation 2021. PROSOMNUS SLEEP TECHNOLOGIES 100% Patient Satisfaction/Preference Leads to Strong Adherence 12 STRICTLY CONFIDENTIAL

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