It's possible there was no requirement for a WARN even with the reclassificaton
A 60-day advance notice is required if a "covered employer" (generally those with 100 or more full-time employees) plans a:
Plant Closing: A shutdown of a single site of employment that results in an employment loss for 50 or more full-time employees during any 30-day period.
Mass Layoff: A reduction in force that is not a plant closing but results in an employment loss at a single site during any 30-day period for At least 33% of the active workforce (if that 33% is at least 50 employees); OR At least 500 employees (regardless of the percentage of the workforce).
That 500 employees is not per instance its per rolling 365 day calender year.
So, it was not a plant closing
It was not 33% or more as that would be A LOT of people. There are 3500 people world wide that work at Jeppeson
If it was all in CO, that would be more than half the people working in that location.
As far as I know, there have been no layoffs in the past year, so there is no number to "add" to make 500.
It su-ks, I have been laid off twice, but it does not appear on the surface that Jeppeson or Thoma Bravo has done anything wrong.