There were two trades. A buy for 1874 and a sell for 1379. Both around 4.5 mil give or take a few. Wondering if this was a short and cover since roughly the same amount of shares, but still doesn't explain how something went off at roughly when nothing traded near there all day. Hopefully someone far better versed in this stuff can offer some rationale. Below is the iHub link showing the trade.
Regardless, a beautiful day for dear MJTK. Very strange, trading very differently than what I have seen recently. But nice end all the same.