The US tank company was a very standardised unit, with the only real variation coming from the variety of types of M4 Sherman that were actually fielded. For simplicity's sake, I have chosen to display each platoon of Shermans as one type (75s, 76s, etc) rather than showing all possible combinations of mix dependent on when the force is being fielded.

The Armored Rifle Platoon shown is a bit infantry-heavy, and the pictures don't actually show the 60mm mortar team. The anti-tank gun lurking at the back of the HQ squad is the 37mm AT gun fielded in 1943, and would be discarded for later forces. 

 
 

Core Troops

Company HQ (2 x M4 Sherman)

Company HQ (2 x M4 Sherman)

Platoon One: 5 x M4 Sherman (75mm gun)

Platoon Two:5 x M4 Sherman (76mm gun)

Platoon Three: 5 x M4 Sherman

Platoon Three: 5 x M4 Sherman

Battalion Support

Light Tank Platoon (5 x M5A1 Stuart)

Assault Gun Platoon Option One: 1943-44 (3 x M8 HMC)

ASSAULT GUN PLATOON OPTION Two: 1944-45 (3 X M4 105mm Sherman)

ASSAULT GUN PLATOON OPTION Two: 1944-45 (3 X M4 105mm Sherman)

Armored Mortar Platoon (3 x M4 81mm MMC Half-Tracks)

Divisional Support

(Understrength) Armored Artillery Battery (3/6 M7 Priest 105mm SP Guns)

Cavalry Reconnaissance Platoon (3 x M8 Armored Car; 3 x Jeep)

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Combat Engineers (also from Division)

COMBAT ENGINEER HQ ELEMENT

COMBAT ENGINEER INFANTRY (3 X eNGINEER SQUAD)

COMBAT ENGINEER VEHICLES

dOZER!

Armored Rifle Platoon

Platoon HQ (Big Man; 60mm Mortar; Optional 37mm Anti-Tank Gun, 1943 only)

Infantry Squad

Infantry Squad

LMG Squad