The defenseman is asking for $5 million and the club is offering $1.95 million, Sportsnet's Elliotte Friedman reports.
De Haan has an arbitration hearing scheduled for Wednesday.
He was a key part of the Islanders' top four on the blue line this past season, ranking fourth in average ice time on the club among players with at least 50 games played and chipping in 25 points while appearing in all 82 games.
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