Here is the link to the ending credits: https://youtu.be/6Sn8J_fBECE?t=602
The credits themselves do not acknowledge any English voice actors whatsoever. Watch them from start to end and see for yourselves.
Even Yggdra Union's Behind The Voice Actors page does not disclose any English voice actors, shown below.
Listed below are additional sources:
With the exception of Keith Silverstein as Royal Soldier-Fencer/Various, all of these credits are incorrect. Karen Strassman's role(s) should say "Additional Voices", while Tara Platt's should say "Aegina Eine Artwaltz/Luciana Rune Artwaltz".