The deadline for the submission of new sites for the November release of the TOP500 List is October 25th (23:59 PST). All system reported have to be installed by November 1st. The last date for submitting Linpack updates is also November 1st (Systems must have been submitted by the deadline above).
Submission deadline for the June release of the TOP500 List is May 16th (23:59 PST). All system reported have to be installed and submitted by May 23rd. The last date for submitting Linpack updates is May 23rd. (Systems must have been submitted by the deadline above).
The interface for submitting new systems is http://top500.org/submit