what types of securities were offered at Walmarts and Targets last
offering when did the offering occur and how huch was offered

Any good stockbroker should be able to tell you this 
Or Email the two companys.  (Investor relations) Most annual reports
will have fairly current data.

The latest securities are likely to be small bond issues floated by
local communities to entice them to bulid a store or bonds for the
massive warehouses
they build regionally to split up shipping containers of goods into
indiviual store quanities.