I can take credit for one of those ... the week before last I put in a bid for 15K, then after a few days got overtaken by the fomo jitters and took a few hundred shares off my bid to make the buy. Of course a day later the SP dropped to below my original bid, but that's how it goes! I can't account for the rest of the bids in 2500-lot multiples, being one small guppy in the CytoDyn Ocean not big enough to make waves, but you can scratch one of those mystery bids off the list!