Apparently that's voluntary for IPO S-1s [0]: > Financial statements in XBRL also are required as exhibits to Securities Act registration statements that conta

Apparently that's voluntary for IPO S-1s [0]: > Financial statements in XBRL also are required as exhibits to Securities Act registration statements that contain financial statements, such as Form S-1 (except registration statements filed in connection with an initial public offering). And by the looks of the search result pages for Apple [1] and Palantir [2], it looks like they haven't filed it that way (the "Interactive Data" label is missing): [0]: https://www.sec.gov/rules/final/2018/33-10514.pdf https://www.sec.gov/rules/final/2018/33-10514.pdf [1]: https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0000320193&owner=exclude&count=40&hidefilings=0 https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&C... [2]: https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0001321655&owner=exclude&count=40&hidefilings=0 https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&C...