Guselkumab parent company?

Who is the parent company of guselkumab?

Guselkumab is marketed under the brand Tremfya. The drug is made by Janssen Biotech (a unit of Johnson & Johnson), so the parent company is Johnson & Johnson. [1]

Who owns Tremfya (guselkumab) today?

Tremfya is owned and commercialized by Janssen Pharmaceuticals, which is part of Johnson & Johnson. [1]

Does guselkumab have any different manufacturers or brands by country?

Guselkumab is the international nonproprietary name for the active ingredient in Tremfya; the ownership and manufacturer relationships are tied to the Janssen/Johnson & Johnson organization. [1]

Sources

[1] https://www.janssen.com/janssen-products/tremfya