25 powerful companies that are hugely influential on social media

We recently released a list of the 50 most powerful companies in America.

To create this list, we factored in fiscal revenue, number of employees, press mentions, and social media influence, as ranked on a scale of 1 to 100 by Klout, a site that analyzes social-media influence of companies and individuals across all platforms.

We decided to re-rank the companies by Klout score to determine which companies command the most influence on social media. Read here for a detailed description of how Klout score is calculated.

Tech giants Amazon and Microsoft are both in the top spot with a near-perfect Klout score of 99 out of a possible 100. Walmart, the No. 1 most powerful company in America, drops to No. 18 when ranked only by social media influence.

Scroll through to find out which of America's most powerful companies stack up on social media.