$BKH SEC Filings

Filing Filed On
SC 13G/A 08 Feb 2018
SC 13G/A 08 Sep 2017
SC 13G/A 10 Feb 2017
SC 13G/A 12 Jan 2017
SC 13G/A 10 Feb 2016
SC 13G/A 08 Jan 2016
SC 13G/A 11 Feb 2015
SC 13G/A 09 Jan 2015
SC 13G/A 11 Feb 2014
SC 13G/A 10 Jan 2014
SC 13G/A 01 Feb 2013
SC 13G/A 11 Jan 2013
BLACK HILLS CORP 01-2012 09 Feb 2012
SC 13G/A 10 Jan 2012
BLACK HILLS CORP NOVEMBER 2011 AMMENDMENT 12 Dec 2011
BKH AS OF 12/31/10 10 Feb 2011
SC 13G/A 05 Nov 2010
BKH AS OF 12/31/2009 12 Feb 2010
SCHEDULE 13G AMENDMENT NO. 1 27 Jan 2010
SC 13G/A 13 Feb 2009