Since Publix is a privately owned company and stocks can only be
purchased by employees... I do not think that information can be
displayed on a public site like this one.
Please refer to the Publix website for that information.
It stock is re-evaluated 4 times a year, not every 3 months though. Its quarters are a bit skewed re-evaluating on May 1st, Aug 1st, Nov 1st then not until Mar 1st when it also issues its annual data.