Sorrell, one of Britain’s highest-paid executives, has previously faced criticism from shareholders over his compensation.
Reuters reported earlier in March that Sorrell is set to receive shares worth 36 million pounds ($55.05 million) this year as a part of an arrangement that depends on the company’s performance.
Sorrell received 22.7 million pounds ($34.71 million) worth of shares last year as part of an overall remuneration package of 29.8 million pounds ($45.57 million).
WPP, Glass Lewis and ISS could not be reached immediately for comments outside regular business hours.
(Reporting by Rishika Sadam in Bengaluru- Editing by Eric Walsh)
