SER ▼ -6.8% - Serina Therapeutics, Inc. $SER - Registration Is Now Open For Tribe Public’s CEO Presentation and Q&A Webinar Event "A New Approach to Advanced Parkinson’s Disease: Serina Discusses SER-252’s Clinical Progress" Serina Therapeutics shares fell 6.8% today despite the company announcing registration for a webinar presentation on SER-252, its experimental Parkinson's disease treatment. The decline suggests investors may have viewed the announcement as a routine communication event rather than substantive clinical news or data that would meaningfully advance the company's pipeline. 23-SEP-2026 04:18 PM ET