$HE SEC Filings

Filing Filed On
S-3ASR 19 Sep 2024
S-3ASR 14 Nov 2022
S-3ASR 01 Mar 2019
S-3ASR 22 Dec 2014
S-3ASR 06 Oct 2014
S-3ASR 28 Mar 2012
S-3ASR 04 Nov 2011
FORM S-3ASR 06 May 2009
FORM S-3 AUTOMATIC SHELF REGISTRATION 05 Nov 2008
AUTOMATIC SHELF REGISTRATION ON FORM S-3 28 Mar 2007