Joe Lauzon is widely reported to be tied with Demain Maia, Terry Etim, and Nate Diaz for most Submission of the Night performance bonus wins, at four each.
JLau SOTYs: Joe Lauzon vs. Melvin Guillard, UFC 136, October 8, 2011 Joe Lauzon vs. Chris Warburton, UFC on Versus 4/UFC Live: Kongo vs. Barry, June 26, 2011 Joe Lauzon vs. Gabriel Ruediger, UFC 118, August 28, 2010 Joe Lauzon vs. Jeremy Stephens, UFC Fight Night 17/UFC Fight Night: Lauzon vs. Stephens, February 7, 2009
In addition, Lauzon has won three Fight of the Night bonuses:
Joe Lauzon vs. George Sotiropoulos, UFC 123, November 20, 2010 Joe Lauzon vs. Sam Stout, UFC 10, January 2, 2010 Joe Lauzon vs. Kenny Florian, UFC Fight Night: Florian vs. Lauzon, April 2, 2008
However, Lauzon reportedly won a Submission of the Night bonus for choking out Brandon Melendez at the TUF 5 Finale, and a Knockout of the Night bonus for his 48-second KO of Jens Pulver at UFC 63. but these bonuses were never officially announced by the UFC.
The UFC's own website refers to him as having won Submission of the Night four times (Warburton, Melendez, Stephens, Ruediger), and currently omits his latest Submission of the Night, over Melvin Guillard.
Thus, it appears that Joe Lauzon is the all-time Submission of the Night leader in the UFC.
For an example of the excitement, even levitation, that Lauzon generates check out:
“This is the official website of the Mixed Martial Arts llc. Commercial
reproduction, distribution or transmission of any part or parts of this website
or any information contained therein by any means whatsoever without the prior
written permission is not permitted.”