Bunk.
PTOI didn't "halt(ed) operations due to below freezing temperatures", they were forced to stop operating due to equipment failure. They didn't....or rather, they COULDN'T....hit the START button when the weather warmed and in the context of what was purportedly an ongoing operation that is absolutely a material event. It obviously should have been reported to shareholders and, equally importantly, made known to the public inasmuch as it included potential shareholders.
If there was ever a "do we or don't we" no-brainer filing decision this was it and he opted not to comply. He should be held liable for any damages caused by his decision by any shareholders who purchased shares during the period in which he chose not to make the inoperable condition of the plant public.