holly bush dying brown leaves
Brown leaves at different spots.
Certified GKH Gardening Expert
I believe your holly may have suffered some winter damage.
I would remove any dead material.
Do you know the type of holly you have planted? Holly varieties have different pruning requirements, so you may want to verify before bringing out the shears.
Covering your holly before winter strikes again this year will help it withstand the long winter months.
Here are a couple links that may be helpful.