Andrew Jennings recently created a free tool to generate email alerts for SEC EDGAR filings.  It's available here.  It's a nifty website that doesn't require any login or registration.  You just set up an alert and it'll send you an email to confirm and manage the alert.  You can even let other people subscribe to your alert if you're working with a team.

This is pretty useful if you're tracking a sector and want to get filings sent to you or if you want to monitor all filings of a particular type–say cybersecurity incident 8-Ks.  The alert tool is probably highly useful for in-house counsel to keep tabs on other companies in their sector.