Maybe they don't want people to find them.
The copyright notice for the web site of Hutchison Whampoa Limited states,
Copyright Hutchison Whampoa Limited. 2003. All rights reserved.
No person, whether an individual or a body corporate, shall create or establish a hyperlink to the HWL Corporate Website by hypertext reference or imaging without the written permission of Hutchison.
I can't create a hyperlink so you'll have to find it yourself.
This isn't an issue of deep linking; they are banning even links to their home page.