The Giants received pick 20 from St Kilda in a trade earlier on Thursday.
The League's 18th club has already secured Gold Coast's mid-first round Gary Ablett compensation pick (traded by Geelong last year) earlier in the week and is set to receive Adelaide's end of round one Phil Davis compensation pick.
Both of these selections will have come the Giants' way via the bidding system tied to the 17-year-old mini-draft.
GWS is set to dominate the 2011 NAB AFL draft, holding 10 of the first 14 picks, including the top five.
But the Giants are now well positioned to snare more elite young talent beyond 2012, when their list building concessions are finished.
The Davis and Palmer compensation selections may be used at any draft between 2011 and 2015, and the Ablett pick can be activated between now and 2014.
The Giants' tactic is similar to that used by the Suns in last year's trade period, when they acquired compensation picks from Geelong (this year on-traded to GWS for Jaeger O'Meara), the Brisbane Lions and Port Adelaide.
Fremantle is expected to use pick 20, along with its pick 16, to try to convince the Lions to grant Mitch Clark his wish of a return to Western Australia.
No trades are official until paperwork has been accepted by the AFL and formally recognised after 2pm on Monday, October 17.
Follow our complete coverage of the 2011 AFL exchange period from October 10-17. Join the AFL trade conversation on Twitter: use #tradeweek in your tweets
