Celgene markets pomalidomide as a multiple-myeloma drug under the brand name Pomalyst. Id. at *1. Celgene has patents related to Pomalyst, which several other drug companies challenged the validity of and sought to bring their own generic pomalidomide products to market. Id. One such company was Mylan Pharmaceuticals Inc. ("MPI") who, in 2017, submitted an Abbreviated New Drug Application ("ANDA") seeking approval to market a generic version of Pomalyst before the expiration of Celgene's four Orange-Book-listed patents. Id. at *6. In its ANDA, MPI included a paragraph IV certification, which generally provide that the patent at issue is invalid, unenforceable, or not infringed by the generic drug seeking to come on market. Id. In response to MPI's ANDA filing, Celgene sued MPI, Mylan Inc., and Mylan N.V. under the Hatch-Waxman Act, asserting its four Orange-Book listed patents. Id.