The opinion of the 3-judge panel is here.
Our own Jonathan Adler co-wrote an amicus brief in the case, and an influential law review article in Health Matrix first advancing the statutory argument accepted by two of the DC Circuit judges.
The article is available on Scholarly Commons, the law school’s repository of scholarship: http://scholarlycommons.law.case.edu/faculty_publications/25/
EDITED TO ADD:
And the 4th Circuit has just released its ruling in the parallel King v. Burwell. All three judges on this panel upheld the subsidies, with one also writing a concurring opinion.