The conciliatory gesture from Spain's representative in Catalonia, which accounts for a fifth of the national economy, came just as the region's secessionist leader appeared to inch away from a plan to declare independence as early as Monday.
Catalonia has been a part of Spain since the 1497 marriage of Queen Isabel of Castille and King Ferdinand of neighbouring Aragon.
GERMAN EU Commissioner Gunter Oettinger has warned that Spain could descend into a civil war over the Cataluña crisis unless calm can be restored and the political deadlock broken.
There is a board meeting scheduled for 1500 GMT Thursday and a possible shift of domicile "is one of the subjects that will be discussed and will be decided today", a Sabadell spokesman who asked not to be named told AFP.
CaixaBank, Gas Natural Fenosa, an energy supplier, and Dogi International Fabrics said they were moving their legal bases from Catalonia's capital, Barcelona.
A member of Catalonia's pro-independence Popular Unity Candidacy party, a member of the region's governing coalition, said on Wednesday Catalonia would move in the regional parliament on Monday to declare independence.
The Socialists, who had been open to the Article 155 option before the referendum, appeared to shift position this week after police used batons and rubber bullets to stop Catalans from voting - scenes that drew worldwide condemnation.
Dialogue is a third option - which European Union officials have urged - but both sides seem to want their trains to crash head-on first and see who comes out worse. It doesn't, however, send a message of confidence in the government of Catalan regional President Carles Puigdemont.
Spain has defended police actions, saying there were firm and proportionate, but videos on Sunday saw police yanking people by their hair and kicking and hitting them.
With its own language and cultural traditions, claims for independence in Catalonia date back centuries but have surged during recent years of economic crisis. "We were planning to hide the ballot boxes down by the river", the man who organized the vote in the village south of Barcelona said.
Yesterday, the Ibex stock index fell below 10000 points for the first time since March 2015 as bank stocks tumbled.
Pro-independence parties who control the regional government staged the referendum in defiance of a Constitutional Court ruling that the vote violated Spain's 1978 constitution, which states the country is indivisible.
Such a move would continue to be opposed strongly by the Madrid authorities, and Spain's King Felipe VI has also voiced his opposition to it. A statement from Prime Minister, Mariano Rajoy's office said negotiation in democracy only has one way, the way of the law.