The U.S. aircraft register, updated daily
Who holds what · as the FAA records the name

Atk Mission Research

Named as the FAA publishes it on its approvals.

Holds 2 approved modifications, most of them for the Pilatus PC-12. FAA spelling: ATK Mission Research.

Approved modifications 2 · newest first

Pilatus PC-12 1Bombardier DHC-8 Dash 8 and Q400 1
2010-05-12ST00004MC · Installation of Special Mission Equipment including special surveillance equipment and radio communication equipment. · DHC-8-200 Series, DHC-8-300 Series
2005-11-21SA10376SC · Descriptive data pertaining to this design change are considered inadequate for duplication in other products. This... · PC-12/45

Source: FAA Dynamic Regulatory System (type certificate data sheets, supplemental type certificates, parts manufacturer approvals, technical standard order authorisations). An organisation's name is as the FAA spelled it on each record; related spellings are separate pages.