TD didn't say. I should have asked but I thought I'd find something on it, but I don't see anything at all. All I know is shares have appeared under the SIGL symbol that were previously under something else -- I didn't even know they were in my account, and my balance increased by 1500. The other possibility is that someone at TD messed up either now or previously.
I haven't been following the stock - has it been trading under SIGL in recent weeks, months? Have you or anyone else see anything unusual?