FYI - the seller in that level 2 data shown is bmo nesbitt burns which is their wealth management arm that only has high net worth client portfolios.  It's different than bmo capital markets who was hired to help bring in new money.  I think it's a bad assumption to think that they are using these clients portfolios to "hold down the price" as you mentioned.  these are either angry clients calling their advisors and telling them to sell, or the advisors themselves who have been given permission to trade individual equities for the clients getting out of the stock.  Not saying price manipulation doesn't happen, just don't think you are right in this particular case.