$ATOM 3500 Call contracts traded today versus 370 Puts. Options action was 4.5 times as active as the previous day's action. As my previous posts shows, there appears to be NEAR-term betting taking place as well. Up until about 1:00 p.m., blocks of 1K shares were being bought in a fairly consistent and constant manner. After 1:00, that buying stopped and the shorts again began the tell-tale 1-2-3-5 share trades- (algos hunting for shares).
It's clear in my mind that this stock is being accumulated by someone(s) as evidenced by volume, price action, and options action. Whether it's "real" investors, or players remains to be seen.