Exhibit 12.2

Exelon Generation Company, LLC

Ratio of Earnings to Fixed Charges

	Years Ended December 31,
	2011			2012			2013			2014			2015
Pre-tax income from continuing operations		2,827			1,058			1,675			1,226			1,850
Plus: (Income) or loss from equity investees		1			91			(10	)		20			—
Less: Capitalized interest		(49	)		(67	)		(54	)		(63	)		(79	)
Pre-tax income from continuing operations after adjustment for income or loss from equity investees and capitalized interest		2,779			1,082			1,611			1,183			1,771
Fixed Charges:
Interest expensed and capitalized, amortization of debt discount and premium on all indebtedness		219			402			445			396			427
Interest component of rental expense (a)		220			291			248			269			284
Total fixed charges		439			693			693			665			711
Pre-tax income from continuing operations after adjustment for income or loss from equity investees and capitalized interest plus fixed charges		3,218			1,775			2,304			1,848			2,482
Ratio of earnings to combined fixed charges		7.3			2.6			3.3			2.8			3.5

(a) Represents one-third of rental expense relating to operating leases, which is a reasonable approximation of the interest factor.