Revenue during the quarter grew 17.50 percent to $7,875 million from $6,702 million in the previous year period. Gross margin for the quarter expanded 530 basis points over the previous year period to 29.54 percent. Total expenses were 90.93 percent of quarterly revenues, up from 89.45 percent for the same period last year. That has resulted in a contraction of 148 basis points in operating margin to 9.07 percent.

Operating income for the quarter was $714 million, compared with $707 million in the previous year period.

However, the adjusted operating income for the quarter stood at $940 million compared to $744 million in the prior year period. At the same time, adjusted operating margin improved 84 basis points in the quarter to 11.94 percent from 11.10 percent in the last year period.

"2016 was a monumental year for Exelon. We made great progress in the ongoing transformation of our company, with a focus on meeting our commitments to stakeholders via the PHI merger and the creation of the ZEC programs in both New York and Illinois that compensate our Nuclear plants for their carbon free attributes," said Christopher M. Crane, Exelon president and chief executive officer. "In addition, each of our operating companies turned in best-ever performance in a range of key metrics, which would not have been possible without the remarkable contributions of our 34,000 employees that work hard every day to keep the power and gas flowing for our customers."

For financial year 2017, the company forecasts diluted earnings per share to be in the range of $2.50 to $2.80 on adjusted basis.

The company has spent $15,492 million cash to meet investing activities during the year as against cash outgo of $7,822 million in the last year. It has incurred net capital expenditure of $8,504 million on net basis during the year, up 13.74 percent or $1,027 million from year ago.

Cash flow from financing activities was $1,191 million for the year, down 75.34 percent or $3,639 million, when compared with the last year.

Cash and cash equivalents stood at $635 million as on Dec. 31, 2016, down 90.23 percent or $5,867 million from $6,502 million on Dec. 31, 2015.

Working capital turns negative
Working capital of Exelon Corporation has turned negative to $1,045 million on Dec. 31, 2016 from positive $6,216 million on Dec. 31, 2015. Current ratio was at 0.92 as on Dec. 31, 2016, down from 1.68 on Dec. 31, 2015.

Cash conversion cycle (CCC) was almost stable at 16 days for the quarter, when compared with the last year period. Days sales outstanding went up to 31 days for the quarter compared with 28 days for the same period last year.

Days inventory outstanding was almost stable at 14 days for the quarter, when compared with the last year period. At the same time, days payable outstanding went up to 29 days for the quarter from 26 for the same period last year.