Can I transfer podcast from my personal acct to a company account

Basically, once you've submitted a podcast using your Apple ID all subsequent changes to the feed will go through - it's assumed that if you have access to the feed you have authority to modify it. What you can do is change the 'itunes:owner' tag which contains (if you entered it) the contact address in case of problems (this is not shown in iTunes, though of course anyone who knows how to access a feed can see it).

I would avoid the hassle of removing and then resbumitting the podcast - for one thing you will lose any subscribers since it will appear as a different podcast (and you will probably have to change the title slightly).

As to actually changing the Apple ID, I don't know whether this is possible. You would have to contact Support. Go to https://itunespodcasts.zendesk.com/hc/en-us/requests/new and click the disclosure triangle at the right of the 'Choose a topic' field - choose 'Other' and proceed from there.

I'm afraid I can't advise on Soundcloud. If you did actually enter an email address in the first place then that would be where you would change it, if you need to.