TSA started limiting non-enrolled pax in the pre-check line last year. If I remember correctly, a company doc or ALPA bulletin was issued in conjunction.

Get Global Entry or Clear. If you travel much it is well worth it.

Travelling on the same listing as someone with GE or Clear will usually get you an automatic listing as well.

Here's a news article link:

https://www.cnbc.com/2017/01/31/this...-for-some.html