Exhibit 12.2

Exelon Generation Company, LLC

Ratio of Earnings to Fixed Charges

	Years Ended December 31,
	2012			2013			2014			2015			2016
Pre-tax income from continuing operations		1,058			1,675			1,226			1,850			873
Plus: Loss (income) from equity investees		91			(10	)		20			—			—
Less: Capitalized interest		(67	)		(54	)		(63	)		(79	)		(107	)
Pre-tax income from continuing operations after adjustment for income or loss from equity investees and capitalized interest		1,082			1,611			1,183			1,771			766
Fixed Charges:
Interest expensed and capitalized, amortization of debt discount and premium on all indebtedness		402			445			396			427			454
Interest component of rental expense (a)		291			248			269			284			222
Total fixed charges		693			693			665			711			676
Pre-tax income from continuing operations after adjustment for income or loss from equity investees and capitalized interest plus fixed charges		1,775			2,304			1,848			2,482			1,442
Ratio of earnings to combined fixed charges		2.6			3.3			2.8			3.5			2.1

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