In 1990, Nyköpings BIS was merged with Nyköpings Hockeylag (Nyköpings HL), created the club as it exists today, though at the time it was given the name Nyköping Hockey 90, or NH90. The newly founded club won their group in that season of Division 2, and—after playoffs and a promotion qualifier—was promoted to Division 1. During their division 1 seasons they used to end up in the middle or bottom of the league, having to play qualification rounds to remain in the league at some point, but when the new second-level league "Allsvenskan Norra/Södra" (north/south) was inaugurated in the 1999/2000 season, Nyköping became a top team.