The listed part

Korolev Condensed Heavy  Suggérée par donshottype 
Gothic Thirteen  Suggérée par donshottype 

Custom for UL?
Several fonts could be used to approximate it, including Korolev Condensed Heavy

The UL website provides downloads of the UL logos in eps form.
http://www.ul.com/marks/ul-listing-and-classification-marks/downloadable-ul-marks/
Here is a rendering of the eps letters with enough detail to compare to possible substitutes:

Gothic Thirteen would also work to approximate LISTED
Weight is closer than Korolev Condensed Heavy, but rhs of _D_ is slightly curved rather than parallel as in LISTED

Thank you so much for your help!!