The Collaborative International Dictionary of English v.0.48:

Ld \Ld.\ n.
   The abbreviation for limited, term appended to the name of
   a company that is organized to give its owners limited
   liability; also abbreviated Ltd. It corresponds to Inc.
   in the United States. [Chiefly British] [abbr.]

   Syn: limited company, Ltd.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

Ld.
    n 1: a company that is organized to give its owners limited
         liability [syn: limited company, Ltd., Ld.]

V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

LD
       LAN Destination (ATM)