ProSomnus SPAC Presentation Deck

I Why are Patients More Adherent With ProSomnus Devices? T I T Smaller & More Comfortable ProSomnus devices allow for significantly more room for the tongue, rather than pushing the tongue back like Legacy OAT¹ Comparison of Tongue Space in Mouth with Device² !Tongue Space Remaining I After ProSomnus Device I Insertion (10.3mm) I I 1. 2. 3. 4. PROSOMNUS SLEEP TECHNOLOGIES O Maximum Spacing within Mouth (~12mm) ~30% smaller overall profile than Legacy OAT ~4.5x larger area for tongue space ~3mm lateral freedom of movement Legacy OAT Tongue Space Remaining After Legacy OAT Device Insertion (1.7mm) Maximum Spacing within Mouth (~12mm) X X 1 I Bulky material Limited lateral freedom of movement I || I I I I I 1 1 X Airway space clogged by design I and manufacturing limitation II I I I I I I I I 1 I Less porosity equals less bio-gunk for ProSomnus³ More Hygienic Color-Difference Test Results: 10-Day Mustard Staining 3.2 PROSOMNUS SLEEP TECHNOLOGIES 7.5 CPAP Mask 27.3 Legacy OAT No clinically or statistically significant tooth movement or bite changes for ProSomnus4 Comparison of Dental Side Effects from OAT4 (in millimeters) 0.0 Fewer Side Effects 0.8 Change in Lower Incisors 0.0 PROSOMNUS SLEEP TECHNOLOGIES 0.5 Change in Upper Incisors PROSOMNUS SLEEP TECHNOLOGIES Murphy, M. Abstract presented at 2021 AADSM meeting Hu, J. et al. Abstract presented at 2021 AADSM meeting and Company data; mm denotes millimeters Gelb, M. Say No to Bio-Gunk. Dental Sleep Insider. 2018 Vranjes N, Santucci G, Schulze K, Kuhns D, Khai A. Assessment of potential tooth movement and bite changes with a hard- acrylic sleep appliance: A 2-year clinical study. J Dent Sleep Med. 2019 0.0 1.6 Change in Overjet 0.0 0.7 Change in Overbite Legacy OAT 31 I I I STRICTLY CONFIDENTIAL

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