[{"project":244,"scanner":"powershell","version":2},{"project":244,"scanner":"powershell","version":3},{"project":244,"scanner":"powershell","version":4},{"project":244,"scanner":"powershell","version":4}]

db.collection.aggregate([{"$group":{"_id":"null","maxV":{"$max":"$version"},data:{$push:"$$ROOT"}}},{$project:{"output":{$filter:{input:"$data",as:"d",cond:{$eq:["$$d.version","$maxV"]}}},"_id":0}}])