And looks like the same 137,399 CRGS shares offered
by Citadel at end of day on Friday, April 13 is now offered by G1 (which is owned by Susquehanna) instead. The other market maker showing size is NITE (which is Virtu, the acquirer of Knight Securities), but not the best offer.
Now 99.46% of the 64,754 CRGS shares traded on Friday were filled short, which makes me believe that it wasn't in fact a real seller long shares. Otherwise, the short fill would've been much lower. It'll be interesting to see if there's a large volume day today, and if so, how much of the volume is filled short.