Byron Koster

+61 2 8274 9550
+61 4 07 211 077


Byron is a corporate lawyer specialising in public M&A transactions including takeover bids and schemes of arrangement.

He has extensive experience takeovers, schemes of arrangement, the sale and purchase of businesses, ASX listings, foreign investment, joint ventures, share buy backs and Corporations Act compliance. Byron also advises on securities law, funds management and corporate governance. Recent major transactions include acting for Vocation Limited in its IPO, acting for Challenger Infrastructure Fund in its sale of assets and winding-up, and acting for Vodafone in its $8 billion merger with Hutchison.

Byron is a member of the Takeovers Panel and is recognised as a leading individual in Corporate/M&A by Chambers Asia-Pacific 2014.

  • Centennial Coal: acting in relation to its $411 million takeover bid for Austral Coal (which involved 5 applications to the Takeovers Panel).
  • Challenger Infrastructure Fund: acting on its sale of assets and winding up.
  • FEX: acting on its takeover bid for NSX.
  • Goldman Sachs JB Were: acting in relation to a $400 million equity derivative issued to Healthscope during the Primary bid for Symbion.
  • Vocation Ltd: acted on its IPO.
  • Vodafone Group: acting in its $8 billion joint venture with Hutchison Telecommunications Australia.
  • Wesfarmers: acting in its $700 million takeover bid for OAMPS.


  • Ranked as a leading lawyer in Corporate/M&A – Chambers Asia-Pacific, 2014
  • The "excellent" Byron Koster is "technically strong" with "good commercial skills.” – Asia Pacific Legal 500, 2014
  • Listed as a leading lawyer in Corporate/Governance Practice and Mergers and Acquisitions Law – Best Lawyers Australia, 2018


  • Bachelor of Laws, University of Sydney
  • Master of Laws, University of NSW
  • Master of Arts, University of Sydney


  • Member, Takeovers Panel
  • Law Council of Australia
  • UNSW, Centre for Continuing Legal Education, Foreign Investment in Australia conference, “3 strikes – are there common themes in the 3 big FIRB rejections?”, October 2013
  • NSW Young Lawyers, Business Law one-day CLE seminar, “What is current market practice in share and asset sales?” March 2012.