Shield
Per bend Gules (Brick Red) and Buff a winged key bendwise counterchanged between in chief four fleurs-de-lis fesswise Or and in base a torteaux fimbriated of the third charged with a six-pointed mullet of the like.
Crest
From a wreath Or and Gules (Brick Red), on a mount Vert, a lion passant of the first langued and armed of the second (Scarlet) charged on the neck with a broad arrow of the last and sustaining an escutcheon bendwise, namely: Per pale Gules and Azure, a bordure Argent.
Motto
TO THE TASK.
Shield
The shield is divided into two parts to represent the dual function of the former unit, supply and transport. The key is a symbol of supply and is winged to indicate the speed of service provided by the unit. The torteaux simulates a wheel and alludes to the distribution of supplies and control of that distribution and service. The four fleurs-de-lis refer to the four battle honors, and the six-pointed mullet refers to the six decorations awarded a predecessor of the unit for service as an airborne Quartermaster company in Europe, World War II. The colors of the shield are those of the unit's predecessors, buff being used for Quartermaster and brick red for Transportation organizations.
Crest
The lion and broad arrow are for the assault landing on Normandy. The red and blue vertically divided shield is suggested by the coat of arms of Bastogne. It has been surrounded by a white border in allusion to the towns being surrounded by the enemy. White also simulates snow, the action having taken place during winter.
The coat of arms was originally approved for the 426th Supply and Transport Battalion on 20 August 1964. It was redesignated for the 426th Supply and Service Battalion and amended to add a crest and update the symbolism on 10 March 1969. It was redesignated for the 426th Supply and Transport Battalion and amended to update the symbolism on 16 September 1986. The insignia was redesignated for the 426th Support Battalion with the blazon and symbolism revised effective 16 April 1994.