Apple is one of 60 companies filing a statement to the US Supreme Court in support of gay marriage, according to a Bloomberg report.
The group, including FaceBook, Nike and Intel, will present its case in March to the Californian court against Proposition 8 – which banned same-sex unions in 2008 after it was legalised for five months.
“No matter how welcoming the corporate culture, it cannot overcome the societal stigma institutionalized by Proposition 8 and similar laws,” the companies said in a brief supplied to Bloomberg by the law firm representing the group, Orrick Herrington Sutcliffe LLP.
Out of the 50 states in the US, 41 outlaw same-sex marriage – bans which harm workplace morale and hinder recruiting, according to the group.
US President Barack Obama has until Thursday to decide which side – if any – he will take on the proposition.