Tonix Pharmaceuticals CMO Dr. Gregory Sullivan to retire effective Aug 20, 2026

Tonix Pharmaceuticals Holding Corp.

Dr. Gregory M. Sullivan informed Tonix of his retirement as Chief Medical Officer.
Retirement effective August 20, 2026.
No successor has been named as of the filing date.
Departure is a planned retirement, not a termination.

item 5.02

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Departed

Dr. Gregory M. Sullivan

Chief Medical Officer

TNXP · Tonix Pharmaceuticals Holding Corp.

Effective: 2026-08-20
Filed: July 21, 2026, 4:05 PM ET

On July 20, 2026, Dr. Gregory M. Sullivan informed Tonix Pharmaceuticals Holding Corp. (the “Company”) that he will retire from his role as Chief Medical Officer of the Company, effective August 20, 2026.

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Executive change SEC 8-K Item 5.02 confidence 0.95

Dr. Gregory M. Sullivan departed as Chief Medical Officer at Tonix Pharmaceuticals Holding Corp..

Action: retire
Role: Chief Medical Officer

Exact text from the filing

On July 20, 2026, Dr. Gregory M. Sullivan informed Tonix Pharmaceuticals Holding Corp. (the “Company”) that he will retire from his role as Chief Medical Officer of the Company, effective August 20, 2026.

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Tonix Pharmaceuticals Holding Corp. filing history →

Source: SEC EDGAR

accession 0001493152-26-034079

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