CONFIRMEDDate confidence: CONFIRMEDStated as firmHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all CONFIRMED pins86% CONFIDENCEOverall confidence: 86%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins at 75% confidence or better4 days agoSanofi's[1] press release is datelined "Paris and Tarrytown, NY, October 1, 2026" and the same release was furnished to the SEC[3].
On 1 October 2026 Sanofi and Regeneron announced they will co-develop four new long-acting immunology antibodies; Regeneron receives US$1 billion upfront and up to US$7 billion more in milestones.
$1B