In Settings/Details/Legal Notice, there is an explanation of how search results are (or are not) shared with specific third parties. There is a link to a page that lists those third parties:
https://www.ubuntu.com/privacy-policy/third-parties
However the link is broken. Is there a valid link somewhere?
The link has been moved a bit. For starters, check https://www.ubuntu.com/privacy-policy/:
Searching in the dash
When you enter a search term into the dash Ubuntu will search your Ubuntu computer and will record the search terms locally. Depending on whether you have opted in or out (see the “Online Search” section below), we may also send your keystrokes as a search term to productsearch.ubuntu.com and selected third parties so that we may complement your search results with online search results from such third parties including: Facebook, Twitter, BBC and Amazon. Canonical and these selected third parties will collect your search terms and use them to provide you with search results while using Ubuntu.
By searching in the dash you consent to:
the collection and use of your search terms and IP address in this way; and the storage of your search terms and IP address by Canonical and such selected third parties (if applicable).
...
For a current list of our selected third parties, please see the third party privacy policies.
That last sentence is a link to the updated list. The software just hasn't been updated in accordance (which would probably require a complicated SRU).
For completeness, the link lists, at the moment:
3sat Mediathek Foursquare Sonsgterr
7Digital GitHub SoundCloud
ABC iView Google docs (Google) Stack Exchange
Amazon Google News TED Talks
Ask Ubuntu Headweb TMDb
BBC iPlayer IMDb Twitter
Bing Video is.gd Vimeo
Clear Sky Chart JSTOR VODO
COLOURlovers Launchpad Weather Underground
Dailymotion Open Clip Art Library Wikipedia
deviantArt Picasa (Google) Wordnik
Dribbble PubMed Yahoo! Finance
eBay Recipe Puppy Yelp
Encuentro reddit YouTube Education
Etsy RTVE YouTube Movies
Europeana SCI-FI-LONDON YouTube Shows
Facebook ScienceDirect
Flickr Songkick
