| Year | Detail |
| 1880 |
Imerys was founded when the Rothschild family combined their metals and mining interests into a company called Peñarroya. |
| 1974 |
Peñarroya branched out, acquiring a French clay roof tile manufacturer and an American steel and metals processor, and established a holding company called Imetal to manage the businesses. |
| 2005 |
Imerys acquired Lafarge Réfractaires Monolithiques, which enabled Imerys to expand its portfolio in monolithic refractories. |
| 2015 |
Imerys acquired S&B, a company specialised in bentonite, continuous casting fluxes for steel, wollastonite, and perlite-based solutions. |
| 2025 |
Imerys partnered with ENGIE and signed a 10-year Corporate Power Purchase Agreement (CPPA) for the annual generation of 200 GWh of renewable electricity in Spain. |