Some of my current colleagues know.
Some of my past colleagues know — Ian for instance.
My current HR admins know: they have reimbursed me for my psychiatrist sessions.
I vacillate on whether to tell all my current colleagues; whether to tell my boss. I almost get all the way to “Yes”, and then something happens — something at once small and insignificant and also a warning flag. A nervous comment about an incoming new colleague, outing their minority status at a largish meeting and commenting on their perceivable ‘weirdness’.
And on the one hand, I understand this as what it is: trying to handle something unfamiliar and dealing with a potentially problematic subject from a leadership position. On the other hand, I know several people who would be furious at being outed this way.
I certainly would not want the first thing my new colleagues know about me to be “Mikael is depressed and medicating.”