"We have now cleared a significant milestone, and we are one step closer to creating the world's leading action sports company."
Boardriders is majority-owned by US investment firm Oaktree Capital, which already held a 19.3 per cent stake in Billabong.
The offer was backed by the Billabong board and by founder Gordon Merchant, as well as major shareholders Ryder Capital and Adam Smith Asset Management.
After announcing a A$18.4 million ($19.5m) half-year loss in February, Billabong warned that rejection of offer would force more equity raising or asset sales to cut A$138.6m of debt before its loans matured.
Boardriders' chief executive David Tanner said there would be "blood on the hands" of anyone that blocked the proposal.
The company will now present the results of the vote to the Federal Court on April 6, so it can proceed with the takeover.