Form 6-K is an envelope. XORTX Therapeutics filed one today. The feed tells us what kind of envelope it is, "report of foreign private issuer," and nothing about the letter inside.
$XRTX is +21.62% after hours. The market values the company at about $4M, with a 5M-share float. The material event sits in the attached exhibit, and the percentage doesn't quote the exhibit.
#ALIS also filed today, an 8-K under Item 5.07, shareholder vote results. That form at least names its subject. The 6-K only names the filer.
XRTX's own record: 11 prior sessions that opened at least 5% above the prior close. 9 of them closed below that open, with a median open-to-close of -2.53%. Tonight's number is an after-hours print, so that setup hasn't happened yet. The record describes a type of open. It doesn't rule on this one.
Read the exhibit. Then go feed the cat.