America's top companies are having a really good year.

Fortune, on Wednesday, released its annual list of the 500 largest U.S. companies, ranked by revenue. According to the website, the 63rd iteration features companies that generate a combined revenue of $12 trillion and a combined profit of $890 billion, representing two-thirds of the U.S.'s total economic output.

As these companies are seen as wildly successful, they tend to be good indicators of economic trends. So it's worth paying attention to it. What's more, 18 firms are still founder led.

Wal-Mart topped the list again, raking in a revenue of $485.87 billion and profits of $13.64 billion in the fiscal year ending on Jan. 31, 2017. Also unsurprisingly, tech companies are continuing to build steam, with Apple reprising its No. 3 spot, making 2017 its 23rd time on the list, and Amazon clocked in at No. 12, up from 18 in 2016. Netflix jumped 65 spots to take 314th, and Facebook scaled 59 spots to come in at 98.

For the first time ever, Tesla made the list at No. 383. Elon Musk's electric car company generated $7 billion in revenue, though it lost $674.9 million in its latest fiscal year. Other founder-led companies to make the list include Alphabet, coming in 27th place, and FedEx, at No. 58.

A record number of women-led companies broke on to the list this year, with 32 companies, or 6.4 percent of the total. The number is up from 21 in 2016 and 24 in 2014 and 2015. Leading the way was General Motors's Mary T. Barra at number eight. GM generated $166.38 billion in revenue and earned $9.43 billion in profits. Other woman-led companies include Ginni Rometty's IBM (32), Indra Nooyi's PepsiCo (44) and Meg Whitman's Hewlett Packard Enterprise (59). The technology company bested Dion Weisler's HP after the split in 2015, and marked its first year on the Fortune list.