A stacked bar chart showing market share as measured by coverage of registered voters. Shows the combined share of the Big Three firms growing from 52 percent in 2014 to 81 percent in 2020.
Premier Election Solutions and Sequoia Voting Systems are two vendors whose IP was ultimately acquired by Dominion, but are shown as separate from Dominion. Much of the P/S market share has been serviced by the Big Three (versus other contractors), although the exact total remains ambiguous. Moreover, non-Dominion companies would have to contract with Dominion to service legacy P/S systems.