Probably the USA government itself as Trump did say they would use futures etc to bring down the POO - if they make a profit on the oil trading then it pays for military maneuvers
Incidentally Ed gets a mention on this web site which also has other interesting reads -
I found an email well after market close re share offering , went to look into making application only to find offer closed same day at 7.30 pm, well thanks a lot for the dilution
Good article from Simon Watkins, I felt at the outset there was a lot more in the background to this than meets the eye of the short sighted general public