| Year | Detail |
| 1904 |
Demant Group was established. |
| 1973 |
Demant Group expanded its production facilities by developing factories in Denmark and Scotland. |
| 1978 |
Demant Group launched its first hearing aid, Oticon E.24V |
| 1983 |
Oticon Holding was established. |
| 1996 |
Oticon launched DigiFocus, a fully digital hearing device. |
| 2000 |
Demant Group acquired Interacoustics, an audiometer manufacturer. |
| 2003 |
Sennheiser Communications A/S was founded as a joint venture between William Demant Holding A/S and German Sennheiser Electronic GmbH & Co. KG. |
| 2018 |
Demant A/S partnered with Philips to bring Philips hearing solutions into the market. |
| 2019 |
William Demant Holding A/S changed its name to Demant A/S. |
| 2020 |
The company launched EPOS, one of the high-end audio solutions providers for organizations and gamers. |
| 2022 |
The company acquired a Chinese retail chain, ShengWang. |