Hewlett is joined in his opposition by other family members of HP's late co-founders. The proxy fight is being led by Hewlett, the William R. Hewlett Revocable Trust, and Edwin E. van Bronkhorst, former chief financial officer of HP and a trustee of several Hewlett and Packard family trusts and foundations. Also intending to vote no on the merger are the William and Flora Hewlett Foundation and the David and Lucile Packard Foundation. The HP heirs and their foundations collectively control around 18 per cent of HP's outstanding shares.