D’Agostino’s executive steps down in grocery chain shake up

It’s the end of an era for D’Agostino’s. 

Nicholas D’Agostino III — whose family founded their namesake grocery chain in 1932 — has quietly stepped down as president and chief operating officer of D’Agostino’s and its sister chain Gristedes, The Post has learned.  Billionaire John Catsimatidis — who engineered the merger of the two iconic Big Apple chains in 2016 when D’Agostino’s was struggling to pay its bills, putting D’Agostino at the helm — disclosed the changes to employees a few weeks ago in a memo obtained by The Post.