I have been unable to find the exact number of employees after going through the various sources. I know there are 60198 commuting workers in 2020 but not the normal employees. In internet it says acciona has 39.000 employees but since it says it has kept growing and in 2019 (the other question to research) says it had 39699 back then it does not make sense.

I have found in their annual report, that their workforce in 2020 decreased to 38355 (page 6).