请教皮大师和8大师 - Company Changed,do I need a new H1B?

Situation: Worked with Company A. Company A got acquired by Company B. Currently working for Company B. H1B and I 140 were filed and approved in name of Company A.

Questions: do I need to get an updated H1B in name of Company B if I want to go back to China for my vacation? Also, is a new H1b needed for my green card process? Thanks so much Master P and Master 8!