El Paso Corp
El Paso said the meeting would be held Friday, instead of Tuesday.
While shareholders can still change their votes before the meeting, the company said on Monday that about 70 percent of its outstanding shares had already been voted as of March 2. More than 98.5 percent of those shares were voted in favor of the deal, El Paso said.
The company needs a majority of the votes cast in order to receive shareholder approval of the sale.
Delaware Chancery Court Judge Leo Strine refused to block the sale last week, but said some of the behavior that led to the deal was disturbing. A shareholder group had sued to stop the deal, arguing that El Paso adviser Goldman Sachs Group Inc
Strine's opinion swayed at least one investment adviser who said he plans to vote against the deal.
When we went through (the opinion), we went 'Holy Christ, you can't vote in favor of something like this', said Greg Kinczewski, the general counsel for Marco Consulting Group.
His firm manages proxy votes for clients such as union pension funds that collectively hold 2.2 million El Paso shares. There are about 770 million El Paso shares outstanding, according to Reuters data.
Adam Pritchard, a professor at the University of Michigan Law School, said postponing the shareholder meeting will help El Paso undercut potential claims that the shareholder vote was tainted because investors did not know about the Delaware court's criticisms.
El Paso did not immediately return a call for a comment on the postponement undercutting potential claims.
El Paso shares were down 2 cents to $28.33 in early afternoon trading on the New York Stock Exchange.
(Reporting By Michael Erman and Tom Hals; Editing by Gerald E. McCormick and Mark Porter)