So says Schäfer

Publikumsgesellschaft f
(com) public corporation
– publicly held corporation
– (GB) public company
(opp, Familien-AG)

And some examples from US sites:
A "public corporation" for this purpose includes: (a) municipal corporations (i.e., town, village, county, city or school district); (b) district corporations; and (c) those public benefit corporations which operate in a territory coterminous with the county or a tax district or districts within the county (Workers' Compensation Law, §60[1]; General Construction Law, §66[1]). A public benefit corporation is a "corporation organized to construct or operate a public improvement wholly or partly within the state, the profits from which inure to the benefit of this or other states, or to the people thereof" (General Construction Law, §66[4]). www.osc.state.ny.us/legal/1997/legalop/op97-1a.htm

"Bonds" or "other evidences of indebtedness" mean any instrument providing
for the payment of money executed by or on behalf of a public corporation ...
www.legis.state.il.us/ilcs/ch30/ch30act310.htm

(7) "Public corporation" means an artificial person, public in ownership, individually created by the state as a body politic and corporate for the administration of a public purpose relating to the state or its citizens.
(8) "Quasi-public corporation" means an artificial person, private in ownership, individually created as a corporation by the state which has accepted from the state the grant of a franchise or contract involving the performance of a public purpose relating to the state or its citizens. www.le.state.ut.us/~code/TITLE63E/htm/63E01003.htm