This year’s list of the Fortune 500 companies is out, and two organizations with PR holdings remain on the list.

Omnicom Group—which includes PR firms Fleishman-Hillard, Ketchum, and Porter Novelli—is No. 195 on the list, up three spots from last year’s rank of No. 198.

Also climbing three spots from last year is Interpublic Group, which ranks No. 355 on this year’s Fortune 500. In 2010, it reached No. 358. PR firms under Interpublic’s umbrella include Weber Shandwick and GolinHarris.

Overall, Walmart ranked No. 1, edging out Exxon Mobile. Here are the top 10:

1. Walmart Stores
2. Exxon Mobil
3. Chevron
4. ConocoPhillips
5. Fannie Mae
6. General Electric
7. Berkshire Hathaway
8. General Motors
9. Bank of America Corp.
10. Ford Motor Co.

Read the full list here.

The Fortune 500 comprises U.S. closely held and public corporations as ranked by their gross revenue, after certain adjustments made by Fortune.