More than 278 companies also signed a brief in support of DOMA's repeal.
"I take it to mean they are sensitively attuned to what is going on," said Bob Witeck, CEO of Witeck Communications, a firm that serves the LGBT market. "They are faster than politicians to take clues and metrics and read them properly. Their imperative is to watch trends and align with trends. ...Most important, perhaps, is that business leaders see doing the right thing is also the smart thing."
"We are an eyewitness to change," said Witeck. "The argument is more about civil rights. It's an affirmed fairness argument and young people are the drivers."
Amanda Hopping-Winn and her partner Jennifer of Berkeley missed an opportunity to marry during the narrow window when same-sex marriage was legal in California.
The couple had a civil ceremony in 2010 in Amanda's home state of New Jersey officiated by her childhood rabbi. "We already had the big reception and the extensive guest list and public display," she said.
Since then, she has given birth to a son, Owen, who is now 2, and the couple is attempting to have a second child. With same-sex marriage now fully recognized in the state, Hopping-Winn, 30, said "we'll jump all over the chance."
She said the road to this Supreme Court decision has been an "absolute emotional roller coaster."
The night President Obama was elected, she said there had been "so much joy," then Prop 8 was enacted by referendum. U.S. District Court Judge Vaughn Walker overturned the law, then there was a stay. "It's been up and down and up and down," said Hopping-Winn.
Now the court has ruled in favor of same-sex couples in California.
"It's a victory and we will take it," said Hopping-Winn, an associate director of a substance abuse resource center. "We are on the right side of history. It's a waiting game [for the whole country to recognize same-sex marriage], but we'll take it as a win."
Joseph and Kevin Covey, in entertainment management and wedding planning in Orange County, were married before same-sex marriage was derailed in California. The couple, 39 and 37, respectively, has been together 14 years.
Their adoptive 9-year-old twin sons filed depositions in the Supreme Court case.
Wrote Austin: "When people are in love there should be nothing holding them back. People should not stop others from loving the one person they choose to spend the rest of their life with. Marriage is about family and my dads take the best care of me and my brother."
He said his family was no different from others: "We go to the movies, they take me to my sports practice, play games and make the holidays, especially Christmas, awesome."
Joseph Covey said he is "disappointed" that the Supreme Court did not go further in their ruling and outlaw marriage discrimination in all 50 states.
"This is about human rights and recognizing a loving couple who want to share their commitment with one another," he said. "If I decide to move from California to Nebraska, where they don't recognize my marriage, that's a problem."
"I didn't like the campaign of Prop 8, pitting family against family," he said.
"They say they are trying to protect marriage, but in the community I live in, I am like any other parent with kids and teach them the same values -- not to lie, not to cheat, to be forthright. What are they protecting marriage from?"
As for the Starling-Littlefields, the Supreme Court ruling on Prop 8 also resonates with them, one of the 18,000 other couples who have been in "legal limbo" since 2008.
"We can now tell our kids that it's OK that their daddies are married," said Starling. "I think it will help stabilize our family, as well."