How did the Supreme Court vote in Citizens United v. Federal Election Commission?

In the 2010 case Citizens United v. Federal Election Commission, the U.S. Supreme Court ruled 5–4 that laws prohibiting corporations and unions from using general treasury funds for independent political advertising violated the First Amendment guarantee of freedom of speech.1

The majority opinion, written by Justice Anthony Kennedy and joined by Chief Justice John G. Roberts, Jr. and Justices Antonin Scalia, Samuel A. Alito, and Clarence Thomas, held that the government could not limit political speech based on a speaker's corporate identity.2

Justice John Paul Stevens authored a dissenting opinion, joined by Justices Stephen Breyer, Ruth Bader Ginsburg, and Sonia Sotomayor, arguing that the ruling threatened the integrity of elected institutions. While the court was divided 5–4 on the core issue of corporate spending, it voted 8–1 to uphold the Bipartisan Campaign Reform Act's disclosure-and-identification requirements.32