Cessation Therapeutics
San Jose, US · Founded 2022 · Delaware corporation
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Cessation Therapeutics develops immunotherapies, including monoclonal antibodies and vaccines, to treat substance use disorders and counter the effects of opioids such as fentanyl and heroin. The company works on medications aimed at preventing opioid overdose deaths.
Founders & leadership
Cessation Therapeutics was founded in 2022 by John D. Harkey, Jr..

Reported raises · per SEC filings
Form D private placements$6.8M disclosed across 2 rounds · 2022–2024
▶$1MraisedApr 2024 · 2 investors · BiotechnologyRule 506(b)
- Andrew BarrettExecutive Officer
- Sharon TetlowDirector
- John HarkeyDirector
- Daniel FineDirector
- Jay ShepardDirector
- Mark PearsonDirector
- Offering amount
- $1M
- Amount sold
- $1M
- First sale
- Mar 2024
- Incorporated
- Corporation, Delaware, 2022
- Federal exemptions
- 06b
▶$5.8MraisedMay 2022 · 31 investors · BiotechnologyRule 506(c)
- Jay ShepardDirector
- Mark PearsonExecutive Officer, Director
- John HarkeyExecutive Officer, Director
- David GenecovDirector
- Eric RasmussenExecutive Officer
- Offering amount
- $10M
- Amount sold
- $5.8M
- First sale
- May 2022
- Incorporated
- Corporation, Delaware, 2022
- Federal exemptions
- 06c
Source: SEC EDGAR Form D. Amounts as filed; amended filings shown once at their latest values.
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Frequently asked questions
- What does Cessation Therapeutics do?
- Cessation Therapeutics develops immunotherapies, including monoclonal antibodies and vaccines, to treat substance use disorders and counter the effects of opioids such as fentanyl and heroin. The company works on medications aimed at preventing opioid overdose deaths.
- Who founded Cessation Therapeutics?
- Cessation Therapeutics was founded by John D. Harkey, Jr. in 2022.
- How much funding has Cessation Therapeutics raised?
- Cessation Therapeutics has disclosed $6.8M raised across 2 rounds.
- Where is Cessation Therapeutics headquartered?
- Cessation Therapeutics is headquartered in San Jose, US.
