Oak Hill Bio and Research Alliance Corporation III Announce Business Combination Agreement to Create Publicly Listed Rare Disease Biotechnology Company to Advance Antisense Oligonucleotide Therapy Rugonersen for Angelman Syndrome

* Transaction to provide Oak Hill Bio with approximately $175 million in gross proceeds, including $75 million of cash in Research Alliance Corporation III’s (Nasdaq: RACC) (“RACC”) trust account that is fully backstopped by RA Capital Management and a $100 million committed private financing.

* Together with Oak Hill Bio’s recent $32.5 million Series A financing, the transaction is expected to provide cash runway for development of rugonersen, a potential best-in-class antisense oligonucleotide (ASO) for the treatment of Angelman syndrome, through Phase 3 readout and potential new drug application (NDA) submission in 2H2029.