1. UBL is the parent shed as said by one member - /blog/post/2252581 - most of the original cab EMDs they have - both WDP4s and WDG4s.
2. GOC got EMDs much later /blog/post/2387853 /blog/post/2387853
3. Other Original cab EMDs -- some are with SGUJ, few with SBI. Some with KJM. Few with LKO.
4. All other WDG4s are modified cab...
more... ones - GY, BGKT, GOC, KZJ, PUNE etc...
5. WDP4s are with only UBL, KJM, SGUJ, BGKT.