Caterpillar Inc. is the world's largest construction equipment manufacturer with headquarters in Peoria, Illinois. In addition to construction machinery, Caterpillar also manufactures diesel engines, gas engines and industrial gas turbines.
A Failure to deliver also known as fails-to-deliver or FTD occurs when a buyer or seller is unable to meet his trading obligations. FTDs for US listed companies are reported to the SEC and published twice a month. Therefore there is a certain delay between the reporting and the publishing of the data.
Number of shares, 3 months chart