To the best of my knowledge Speilberg's jet was taken back to Gulfstream and has not left since.
BTW the image is not the jet. I posted it because I saw Rabbit Run in the ownership history. Lemme pull the flight history on Speilberg. BRB.
So Speilberg's Jet (N900KS) was flown from GulfStream Long Beach to Gulfstream Van Nuys on June 6th and it has not moved since. On April 20th it was flown from Van Nuys to Long Beach. The last time it made any travel flight was March 14th.