I think you mean the roughly 14,000 users:
"with at least the equivalent of $20,000 in any one transaction type (buy, sell, send, or receive) in any one year during the 2013-2015 period.
do[es] not include users: (a) who only bought and held bitcoin during the 2013-15 period; or (b) for which Coinbase filed Forms 1099-K during the 2013-15 period"


I believe this was posted earlier, but if not, here is a copy of the Narrowed Summons to Coinbase
https://www.scribd.com/document/365893210/US-v-Coinbase-order?irgwc=1&content=10079&campaign=Skimbit%2C%20Ltd.&ad_group=66960X1514734Xfb366f45a06c38b3049ba2d8889f39ea&keyword=ft750noi&source=impactradius&medium=affiliate#from_embed


_{Edit:URL and grammar}