How is it possible that a company would go from a stock value of $514 million to just $3?

The stock went through 2 reverse splits just this year:

• May 12, 2025: 1:16 stock split
• July 7, 2025: 1:15 stock split

There were more:

• December 18, 2023: 1:15 split
• April 20, 2020: 1:20 split
• My 31, 2016: 1:12 split
• August 7, 2012: 1:7 split
• May 26, 2006: 1:10 split

(source)

Let's do the math:

1071220151516 = 1:60,480,000 split from the original 2004 price. That means that the nominal price per share at the time was about $7.97. There were just waaaaaaaaaaay more shares. Price tracking sites usually track valuation, not nominal prices, so when splits happen they adjust historical prices accordingly. That's why the appearance of a humongous number even though in reality there was never a single share valued at such a price in real time.

Yahoo's article explaining reverse splits here (about another company, but the principle is the same).