In the Defense of Marriage Act case, United States vs. Windsor
Majority opinion: Justice Anthony Kennedy, joined by Justices Ruth Bader Ginsburg, Stephen Breyer, Sonia Sotomayor and Elena Kagan.
Dissenting: Chief Justice John Roberts; Justice Antonin Scalia, joined by Justice Clarence Thomas and, in part, by Roberts; and Justice Samuel Alito, joined in part by Thomas.
In the California same-sex marriage case, Hollingsworth vs. Perry
Majority opinion: Roberts, joined by Scalia, Ginsburg, Breyer and Kagan.
Dissenting: Kennedy, joined by Thomas, Alito and Sotomayor.