?! I think you are conflating and misnaming several things.
The former PRR Octoraro line from Chadds Ford, PA to Nottingham, PA via Kennett Square, PA is still operating under the name *East* Penn Railroad
, which is owned by the holding company Regional Rail LLC
The various incarnations of East Penn never operated in Newark, DE, the southern end of the old Wilmington and Northern is in Elsmere, DE west of Wilmington, DE.
I'm no mod, but this post should probably go in a Pennsylvania board as the Octoraro line is entirely in PA and northern DE is not really Delmarva or DC.