0001179110-12-006557.txt : 20120405 0001179110-12-006557.hdr.sgml : 20120405 20120405174605 ACCESSION NUMBER: 0001179110-12-006557 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20120404 FILED AS OF DATE: 20120405 DATE AS OF CHANGE: 20120405 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MARKWEST ENERGY PARTNERS L P CENTRAL INDEX KEY: 0001166036 STANDARD INDUSTRIAL CLASSIFICATION: CRUDE PETROLEUM & NATURAL GAS [1311] IRS NUMBER: 270005456 FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 1, SUITE 1600 CITY: DENVER STATE: CO ZIP: 80202 BUSINESS PHONE: 303-925-9200 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE STREET STREET 2: TOWER 1, SUITE 1600 CITY: DENVER STATE: CO ZIP: 80202 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: NICKERSON RANDY S CENTRAL INDEX KEY: 0001235080 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-31239 FILM NUMBER: 12746666 MAIL ADDRESS: STREET 1: 1515 ARAPAHOE ST. STREET 2: TOWER 2, SUITE 700 CITY: DENVER STATE: CO ZIP: 80202 4 1 edgar.xml FORM 4 - X0305 4 2012-04-04 0 0001166036 MARKWEST ENERGY PARTNERS L P MWE 0001235080 NICKERSON RANDY S C/O MARKWEST ENERGY PARTNERS, L.P. 1515 ARAPAHOE ST. TWR 1, STE 1600 DENVER CO 80202 0 1 0 0 SVP, Chief Commercial Officer Common Units 2012-04-04 4 S 0 4100 58.5677 D 250570 D Sales were effected pursuant to instructions given by the reporting person on March 9, 2012, pursuant to a Rule 10b5-1 trading plan. The price reported in Column 4 is a weighted average price. These units were purchased in multiple transactions at prices ranging from $58.18 to $59.0401, inclusive. The reporting person undertakes to provide to MarkWest Energy Partners, L.P., any security holder of MarkWest Energy Partners, L.P., or the staff of the Securities & Exchange Commission, upon request full information regarding the number of units sold at each separate price. Amount of securities beneficially owned following the reported transaction(s) includes Common Units owned and Restricted Units subject to varying vesting terms. /s/ Sean M. McKendry as POA for Randy Nickerson 2012-04-05