I do note this is uber left wing Politifact AND I note that they were pushing very hard in this to minimize the importance of Black slave owners and to maximize the number/percentage of White slave owners whenever they could so I take any of their statements and anything they endorse with a truckload of salt. For example they repeatedly attack the 1.4% of Americans owned slaves claim......but if you look at the US as a whole, that's probably true. Only 5.63% in the Slaveholding states owned slaves.....and of course Black slave owners were included in that 5.63%.
They also claim that those who rented slaves (it was common practice for slave owners to rent out their slaves for various jobs when it was not planting or harvesting season) were also slave masters. Uhh...no they weren't.
Mississippi: 49% South Carolina: 46% Georgia: 37% Alabama: 35% Florida: 34% Louisiana: 29% Texas: 28% North Carolina: 28% Virginia: 26% Tennessee: 25% Kentucky: 23% Arkansas: 20% Missouri: 13% Maryland: 12% Delaware: 3%
Source: https://faculty.weber.edu/kmackay/selected_statistics_on_slavery_i.htm