It was announced on 18 March 2011 that Reginussen was loaned out to Tromsø, returning to the club for the first time since 2009. He made his second Tromsø’s debut, starting the whole game, and kept a clean sheet, in a 2–0 win against IK Start on 10 April 2011. In a follow–up match against Sogndal, Reginussen helped the side kept another clean sheet, in a 0–0 draw. Since re-joining the club, he quickly became a first team regular, playing in either the defence and midfield positions. After his transfer move to Odense will take effect on 1 July 2011, Reginussen then scored his first Tromsø for the first time since 2009, in a 3–3 draw against Stabæk, in his last appearance for the club. By the time he departed the club once again, Reginiussen made ten appearances and scoring once for the side.