Wading into the highly emotional but quickly shifting national debate over gay marriage, 278 companies filed an amicus brief Wednesday in support of Edith Windsor, the New York woman whose challenge of the Defense of Marriage Act (DOMA) has been taken up by the United States Supreme Court.

Among the companies filing the brief are behemoths Microsoft, Google, Amazon, and Starbucks, corporate entities associated with America’s youth culture. But others include pharmaceutical giant Pfizer, insurance mainstay Aetna, and Citigroup.

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