Koscielny scored his second goal of the season against Burnley.
Gazidis earned £2.648m for the year ending June 2016.
The German suffered a severe knee injury in July.
Wenger has suggested he may be interested in the vacant position.
Bellerin, 21, has three years left on his contract at the Emirates Stadium.
Arsenal have won five games in succession in the league.
Laurent Koscielny joined Arsenal in 2010 from Ligue 1 side Lorient.
Arsene Wenger has won three league titles and six FA Cups.
Wilshere has not played the full 90 minutes in the Premier League since September 2014.
Harry Redknapp's lawyers claim he did not know about the betting incident until after the game.
Spaniard's current deal is yet to expire in the summer.
Olivier Giroud has played just 51 minutes of Premier League football this season.
Arsenal boss remains focused on club role, but is out of contract in the summer of 2017.
The Arsenal boss said mid-week the French midfielder could be sidelined for three weeks.
Iwobi has been a regular in Arsene Wenger's team this season.
The German has two years left on his current contract at the Emirates Stadium.
Wenger was linked to the job prior to Sam Allardyce's appointment.
Theo Walcott's double earned the Gunners a comfortable Champions League victory at the Emirates.
Arsene Wenger is celebrating his 20th anniversary in charge of Arsenal.
Forward had already scored in two previous Premier League wins over Chelsea and Hull.
The 20-year-old was blocked by the Gunners from representing his country.
IBTimes UK assesses the FA's options as they face a second managerial search in just two months.