Abbvie (Mavyret) and Gilead (Solvadi, Harvoni) have both developed and marketed treatments which cure Hepatitis C.

Roche sells MabThera which (together with chemotherapy) cures about 2/3rds of a common type of lymphoma. They also recently failed with a large phase III study in this setting, having hoped to cure even more people with an improved treatment.

Celgene and Abbie/Pharmacyclics both have large phase III trials running in the same disease, aiming to cure more patients through the addition of their drugs to the current standard-of-care treatment.

Novartis has just launched Kymriah, a CAR-T treatment which offers the prospect of long-term remissions in paediatric ALL. (Too early to say whether some of these will effectively represent cures.)

Various pharmaceutical companies are attempting to develop new antibiotics, which would cure infections.

(Just recent examples, and off the top of my head...)

I was like "MabThera?" but then I Googled it and that's Rituximab which I'd heard of. I had Hodgkins (which is one of the less common Lymphomas) so I got ABVD which doesn't involve Rituximab, but I read about loads of the chemotherapy drugs because I was morbid.

The closest you came to naming one was MabThera. I'll check it, thanks.

Edit: Oops, also Harvoni, etc.