The Philippine Center for Investigative Journalism (PCIJ) compiled all publicly available data on national candidates’ Facebook Ad Spend for the 2022 elections.
So far, VP Leni Robredo has spent the most money on Facebook ads, totaling Php14.1 million, followed by Sen. Sherwin Gatchalian, who has spent Php8.59 million. Ping Lacson, another presidential candidate, finished third with Php5.36 million.
The following is a list provided by PCIJ.

News 5 shared a similar table on Facebook with the top three presidential ad spenders, comparing how much they spent before and after declaring candidacy.

These statistics were gathered from the Facebook Ad Library and will be kept until December 31, 2021. After that, Facebook makes these data publicly available for verified pages of public figures/officials in the interest of transparency.