0001593968-21-000726.txt : 20210302 0001593968-21-000726.hdr.sgml : 20210302 20210302190318 ACCESSION NUMBER: 0001593968-21-000726 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210226 FILED AS OF DATE: 20210302 DATE AS OF CHANGE: 20210302 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: MILLS STEVEN RICHARD CENTRAL INDEX KEY: 0001230727 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-31303 FILM NUMBER: 21706075 MAIL ADDRESS: STREET 1: C/O ARCHER DANIELS MIDLAND CO STREET 2: 4666 FARIES PARKWAY CITY: DECATUR STATE: IL ZIP: 62526 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: BLACK HILLS CORP /SD/ CENTRAL INDEX KEY: 0001130464 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRIC SERVICES [4911] IRS NUMBER: 460458824 STATE OF INCORPORATION: SD FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 7001 MT RUSHMORE RD STREET 2: PO BOX 1400 CITY: RAPID CITY STATE: SD ZIP: 57709 BUSINESS PHONE: 6057212343 MAIL ADDRESS: STREET 1: 7001 MT RUSHMORE RD STREET 2: PO BOX 1400 CITY: RAPID STATE: SD ZIP: 57709 FORMER COMPANY: FORMER CONFORMED NAME: BLACK HILLS HOLDING CORP DATE OF NAME CHANGE: 20001222 4 1 primary_01.xml PRIMARY DOCUMENT X0306 4 2021-02-26 0001130464 BLACK HILLS CORP /SD/ BKH 0001230727 MILLS STEVEN RICHARD PO BOX 1400 RAPID CITY SD 57709 true false false false Common Stock 18127.3182 D Phantom Stock Unit 2021-02-26 4 A false 443.7120 59.16 A Common Stock 443.7120 16778.9113 I By Trust Phantom Stock Unit 2021-03-01 4 A false 156.2511 60.6721 A Common Stock 156.2511 16935.1624 I By Trust 1 for 1 conversion ratio Derivative security is exercisable upon retirement under terms of the agreement. Derivative security expires upon retirement under terms of the agreement. /s/Lorna J. Gunderman 2021-03-02