Manufacturer of cymbalta?

Who makes Cymbalta (duloxetine)?

Cymbalta is manufactured by Eli Lilly and Company. [1]

Who is the marketing authorization holder in the US?

In the United States, Eli Lilly and Company is the company associated with Cymbalta’s branded product and labeling. [1]

Is it available from any other manufacturers?

Cymbalta is a brand-name duloxetine product; the generic version of duloxetine is manufactured by multiple companies after approval of their respective generic products, but the brand Cymbalta itself is by Eli Lilly. [1]

Sources:
[1] https://www.drugpatentwatch.com/