RE: Patients21 Jan 2026 09:53
No one outside of trials knows for certain.
A listed biotech or pharma company must issue an RNS only if the event is “material” to the company under UK Market Abuse Regulation (MAR).
Material.
A patient death can be material if:
- It is unexpected and suggests a safety signal.
- It leads to a clinical hold, trial suspension, or protocol change.
- It threatens the viability of the drug, trial, or company.
- Regulators intervene in a way that affects timelines or outcomes.
In these cases, companies typically issue an RNS because failing to do so could be considered withholding price‑sensitive information.
This aligns with UK transparency expectations for clinical trials and regulatory oversight.
A death does not automatically trigger an RNS if:
- The death is expected within the disease population (e.g., oncology, late‑stage conditions).
- The event is assessed as unrelated to the investigational drug.
- The trial continues without regulatory action.
- The event does not materially affect the company’s prospects.
In these cases, the death is still reported to regulators and ethics bodies under clinical trial rules, but not to the stock market.