0001562180-18-003577.txt : 20180814 0001562180-18-003577.hdr.sgml : 20180814 20180814141807 ACCESSION NUMBER: 0001562180-18-003577 CONFORMED SUBMISSION TYPE: 5 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20180630 FILED AS OF DATE: 20180814 DATE AS OF CHANGE: 20180814 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: OBRIEN WILLIAM K CENTRAL INDEX KEY: 0001187425 FILING VALUES: FORM TYPE: 5 SEC ACT: 1934 Act SEC FILE NUMBER: 000-23599 FILM NUMBER: 181016318 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: MERCURY SYSTEMS INC CENTRAL INDEX KEY: 0001049521 STANDARD INDUSTRIAL CLASSIFICATION: ELECTRONIC COMPONENTS & ACCESSORIES [3670] IRS NUMBER: 042741391 STATE OF INCORPORATION: MA FISCAL YEAR END: 0630 BUSINESS ADDRESS: STREET 1: 50 MINUTEMAN ROAD CITY: ANDOVER STATE: MA ZIP: 01810 BUSINESS PHONE: 9782561300 MAIL ADDRESS: STREET 1: 50 MINUTEMAN ROAD CITY: ANDOVER STATE: MA ZIP: 01810 FORMER COMPANY: FORMER CONFORMED NAME: MERCURY COMPUTER SYSTEMS INC DATE OF NAME CHANGE: 19971112 5 1 primarydocument.xml PRIMARY DOCUMENT X0306 5 2018-06-30 false 0 0 0001049521 MERCURY SYSTEMS INC MRCY 0001187425 OBRIEN WILLIAM K 50 MINUTEMAN ROAD ANDOVER MA 01810 true false false false Common Stock 2016-12-12 5 S false L 19910.00 31.63 D 70660.00 I Power of Attorney Common Stock 2016-12-13 5 S false L 11700.00 31.63 D 58960.00 I Power of Attorney Common Stock 2017-11-28 5 G false 1937.00 52.61 D 57023.00 D The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $31.45 to $31.86, inclusive. Although Mr. O'Brien is neither a trustee nor a beneficiary of the family trust that held these shares, he holds a power of attorney to dispose of the shares and accordingly these shares are reported as being indirectly beneficially owned by Mr. O'Brien. /s/ Michelle McCarthy, Attorney-in-Fact for OBRIEN WILLIAM K 2018-08-14