Research Alliance Corporation III filed its first S-4 on August 24. The live book is OHB Pediatrics / Oak Hill Bio. The business combination agreement was dated July 26. PIPE, SAFE, and backstop language already sat in the 10-Q. This print opens the SEC clock.
How to sit with a new book
Do not treat “S-4 filed” as “close is near.” Treat it as: amendment velocity starts here. Pulse jumped 30 → 55 off the listed baseline. Watch the first S-4/A, then whether those gaps shrink, then a form of proxy.
Pulse Impact
- Previous Pulse: 30
- New Pulse: 55
- Change: +25
- Driver: The first registration statement opens the book and lifts Pulse off the listed baseline.
First S-4 dated August 24. Not investment advice.