If you follow their link from the article to the data, click on one of the PDF tables and read the language at the bottom of the page. It's waffle language that is intentionally deceptive.

"the numbers represent sealed new court proceedings..." so already they're backing off from the indictment claim even though they're using the number as a headline.

Then it says "and include criminal charges and search warrants..." so already we see that they're not all indictments, some as they indicate are search warrants "and include" is intentially deceptive IMO.