Who should own the means of production?

[sting in the rafters]

Land: Nominally private, though state ownership of utilities and energy might be prudent given the tendency to form natural monopolies.
Labor: The workers, via trade unions.
Capital: Items listed as assets on the balance sheet are privately owned, however the trade union should mostly handle human capital (e.g. operations, project planning, occupational skills, training, certification). HR is an exception as anecdotally neutral arbitration tends between the owner class and labor tends to produce the most optimal outcomes, am open to other suggestions tho.
Entrepreneurship (or profit): Germanic model of Codetermination. Shareholders, partners, or the owner(s) may claim a profit off the productivity of their business, however labor representation on the board of directors is in order for large corporations to properly represent workers' interests. Likewise wage laborers deserve stock grants as to both reward their share of equity in the company and increase employee retention.