April 2015 — Emails and text messages revealed that in April 2015, Monsanto started communicating with high-level officials from numerous government agencies about one month after the IARC decision that negatively impacted its Roundup product by officially classifying glyphosate as a probable human carcinogen based on its review of published data.
Reference: Moncivais, Katy. “Roundup Cancer Lawsuit: 2020 Updates & Settlements.” Consumer Safety, 8 Jan. 2021, https://www.consumersafety.org/product-lawsuits/roundup/