Kathy Perks spoke during the sale of Grey Gables, and locked the place for the last time at the end of the episode on 5th May, 2022. She then went off on 8th May for a year-long road-trip in Canada and America, after which she planned to sell April Cottage and buy a property in Hereford near her son Jamie, who moved there several years ago. I assume she must have been eaten by bears or something, because she has not come back to reclaim her house from Tom and Natasha; I wonder to whom they now pay their rent.
Before that she had last spoken on 23rd November 2015, evicting the Grundys from their prolonged stay at Grey Gables after the flood. I think Sean O'Connor may have disliked her; or perhaps he just found her potentially giving her best friend Pat some support through the Rob saga inconvenient, and silenced her.
Neither she nor Lucy Perks has any shares in The Bull; Lilian bought a 51% share of it from Caroline, who had inherited 33% from Guy Pemberton and then, when Sid and Jolene needed money for Kathy's divorce settlement, quite reasonably insisted on an increased shareholding in exchange for bailing them out. Kathy took her share of The Bull in cash then, and was not left any later.
https://ambridgereporter.org.uk/BullHistory.html
"In November 2000 Caroline Pemberton, who had inherited Guy's share in The Bull, was asked by Sid Perks and Jolene Rogers to buy a larger share in order to pay Kathy's divorce settlement, and in exchange for the £60,000 she put in to pay off Kathy she required a majority shareholding, 51%, instead of the 50% Sid had originally offered her. The Bull was then valued at £300,000." (This seems fair, since she already owned 30%, £100,000, and added £60,000 = £160,000, which was more than half The Bull's value at the time.)
Kenton is married to the part-owner and landlady of The Bull, Jolene; this doesn't mean he is the pub's landlord, any more than being married to Justin Elliott would have meant Lilian ran Damara Capital (if Justin had married her rather than "loving her too much to marry").