From the passage provided, extract the freight train companies using the corridor.  Place them in a bullet list.

The corridor is used by many Amtrak trains, including the high-speed Acela, intercity trains and several long-distance trains. Most of the corridor also has frequent commuter rail service, operated by the MBTA, Shore Line East, Hartford Line, Metro-North Railroad, Long Island Rail Road, New Jersey Transit, SEPTA and MARC. While large through freights have not run on the NEC since the early 1980s, several companies continue to run smaller local freights over some select few sections of the NEC including CSX, Norfolk Southern, CSAO, Providence and Worcester, New York and Atlantic and Canadian Pacific, with the first two considered to have part-ownership over those routes.

- CSX
- Norfolk Southern
- CSAO
- Providence and Worcester
- New York and Atlantic
- Canadian Pacific