they don't shot gun after plebe summer. 1st and 2nd companies make alpha company over plebe summer, 3rd and 4th make bravo, and so forth. they skip juliett. each number company is a platoon during plebe summer and then tehy join their entire company during the academic year.
for those parents who don't know, your company is your family at the academy. you eat, sleep and train with them and if you do intramurals you play sports with them. they are your lifeline while you are there, your best friends.