The money was promised to the peer for a successful handover of his role to new chief executive David Levin, and the company has explained that it is contractually obliged to make the payment.
The payment has been opposed by UBM shareholder organisations including the Association of British Insurers and the National Association of Pension Funds.
It is believed that today's resolution to pass the company's remuneration report will be blocked, judging by the weighting of proxy votes already received. However, votes may be changed at the meeting itself, so the resolution could yet be approved.
The resolution is only advisory and would not prevent Lord Hollick from taking the bonus.
The meeting will see Lord Hollick, who was held leadership positions in UBM predecessor companies for 31 years, step down from the UBM board.
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .