[dpup]

See "Ownership and Licensing of Intellectual Property" here: https://medium.com/policy/9db0094a1e0f

"You retain ownership of all intellectual property rights in your User Content. Medium (and/or other third parties) retains ownership of intellectual property rights in all Content other than User Content."

[ealexhudson]

It doesn't matter if you retain ownership if you also give them a "broad license" to re-use the content. Ownership gets you little more than a little bit of control over your name in parts of Europe.