Willbros 8-K Entry into a Material Definitive Agreement

Exhibit 99.1

WILLBROS GROUP, INC.

INDEX TO UNAUDITED PRO FORMA CONDENSED

CONSOLIDATED FINANCIAL STATEMENTS

	Page
Unaudited Pro Forma Condensed Consolidated Financial Statements – Introductory Information	1
Unaudited Pro Forma Condensed Consolidated Balance Sheet at September 30, 2013	2
Unaudited Pro Forma Condensed Consolidated Statement of Operations for the nine months ended September  30, 2013	3
Unaudited Pro Forma Condensed Consolidated Statement of Operations for the nine months ended September  30, 2012	4
Unaudited Pro Forma Condensed Consolidated Statement of Operations for the year ended December 31, 2012	5
Unaudited Pro Forma Condensed Consolidated Statement of Operations for the year ended December 31, 2011	6
Unaudited Pro Forma Condensed Consolidated Statement of Operations for the year ended December 31, 2010	7
Notes to the Unaudited Pro Forma Condensed Consolidated Financial Statements	8

Unaudited pro forma condensed consolidated financial statements

Willbros Group, Inc., a Delaware corporation (the “Company”), previously announced its intent to exit the electric and gas distribution business in the Northeast and sell its investment in the related Hawkeye business, which formed part of the Company’s Utility Transmission and Distribution operating segment. On November 12, 2013, Hawkeye, LLC, a New York limited liability company and wholly-owned subsidiary of the Company, and Halpin Line Construction LLC, a New York limited liability company and wholly-owned subsidiary of the Company (the “Sellers”), entered into an Amended and Restated Asset Purchase Agreement dated as of such date (the “Purchase Agreement”), with Elecnor Hawkeye, LLC, a Delaware limited liability company, as purchaser (“Elecnor”). Elecnor is a wholly-owned subsidiary of Elecnor, Inc., a Delaware corporation and wholly-owned subsidiary of Elecnor, S.A., a company organized in Spain.

On November 14, 2013, the transactions contemplated by the Purchase Agreement were consummated, and the Sellers sold certain of their assets comprising the Hawkeye business (the “Disposition”)

The following unaudited pro forma condensed consolidated statement of operations for the nine months ended September 30, 2013 and 2012 and years ended December 31, 2012, 2011 and 2010 are based on the Company’s historical consolidated statements of operations, and give effect to the Disposition as if it had occurred on January 1, 2012. The following unaudited pro forma condensed consolidated balance sheet as of September 30, 2013 is based on the Company’s historical balance sheet as of that period, and gives effect to the Disposition as if it had occurred on September 30, 2013.

The unaudited pro forma condensed consolidated financial statements include specific assumptions and adjustments related to the Disposition. The adjustments are based upon presently available information and assumptions that management believes are reasonable under the circumstances as of the date of this filing. However, actual adjustments may differ materially from the information presented. The unaudited pro forma condensed consolidated financial statements, including notes thereto, should be read in conjunction with the Company’s audited consolidated financial statements and notes thereto for the year ended December 31, 2012, contained in its Current Report on Form 8-K dated September 9, 2013, filed September 9, 2013, as well as in conjunction with the Company’s unaudited condensed consolidated financial statements and notes thereto for the three and nine months ended September 30, 2013 contained in its Quarterly Report on Form 10-Q.

The unaudited pro forma condensed consolidated financial information presented is for informational purposes only. It is not intended to represent or be indicative of the consolidated results of operations or financial position that would have occurred had the Disposition been completed as of the dates presented nor is it intended to be indicative of future results of operations or financial position.

1

WILLBROS GROUP, INC.

Pro Forma Condensed Consolidated Balance Sheet

September 30, 2013

(In thousands)

Unaudited

	Willbros as reported(a)		Pro forma adjustments			Willbros pro forma results
Current assets:
Cash and cash equivalents	$	20,075	$	—		$	20,075
Accounts receivable, net		372,389		—			372,389
Contract cost and recognized income not yet billed		88,571		—			88,571
Prepaid expenses and other assets		27,820		—			27,820
Parts and supplies inventories		5,126		—			5,126
Deferred income taxes		10,260		—			10,260
Assets held for sale		43,948		(27,836	)(b)		16,112
Total current assets		568,189		(27,836	)		540,353
Property, plant & equipment		112,859		—			112,859
Intangible assets, net		146,859		—			146,859
Other assets		36,139		—			36,139
Total assets	$	864,046	$	(27,836	)	$	836,210
Current liabilities:
Accounts payable and accrued liabilities	$	244,378	$	—		$	244,378
Contract billings in excess of cost and recognized income		19,173		—			19,173
Current portion of capital lease obligations		961		—			961
Notes payable and current portion of long-term debt		5,602		—			5,602
Current portion of settlement obligation of discontinued operations		6,250		—			6,250
Accrued income taxes		3,471		—			3,471
Liabilities held for sale		16,551		(2,912	)(b)		13,639
Other current liabilities		6,167		—			6,167
Total current liabilities		302,553		(2,912	)		299,641
Long-term debt		301,126		(25,000	)(c)		276,126
Capital lease obligations		1,605		—			1,605
Long-term portion of settlement obligation of discontinued operations		32,750		—			32,750
Long-term liabilities for unrecognized tax benefits		4,729		—			4,729
Deferred income taxes		8,425		—			8,425
Other long-term liabilities		37,311		—			37,311
Total liabilities		688,499		(27,912	)		660,587
Stockholders equity:
Attributable to Willbros Group, Inc.		175,258		76	(d)		175,334
Noncontrolling interest		289		—			289
Total stockholders’ equity		175,547		76			175,623
Total liabilities and stockholders’ equity	$	864,046	$	(27,836	)	$	836,210

2

WILLBROS GROUP, INC.

Pro Forma Condensed Consolidated Statement of Operations

For the Nine Months Ended September 30, 2013

(In thousands, except share and per share amounts)

Unaudited

	Willbros as reported(a)			Pro forma adjustments			Willbros pro forma results
Contract revenue	$	1,478,261		$	—		$	1,478,261
Operating expenses:
Contract		1,326,017			—			1,326,017
Amortization of intangibles		11,311			—			11,311
General and administrative		122,260			—			122,260
		1,459,588			—			1,459,588
Operating income		18,673			—			18,673
Other expense:
Interest expense, net		(22,832	)		1,630	(e)		(21,202	)
Loss on early extinguishment of debt		(11,573	)		—			(11,573	)
Other, net		(413	)		—			(413	)
		(34,818	)		1,630			(33,188	)
Loss from continuing operations before income taxes		(16,145	)		1,630			(14,515	)
Provision for income taxes		6,943			—			6,943
Net loss from continuing operations	$	(23,088	)	$	1,630		$	(21,458	)
Basic loss per share:
Loss from continuing operations	$	(0.48	)	$	0.04		$	(0.44	)
Diluted loss per share:
Loss from continuing operations	$	(0.48	)	$	0.04		$	(0.44	)
Weighted average number of common shares outstanding:
Basic		48,512,089			48,512,089			48,512,089
Diluted		48,512,089			48,512,089			48,512,089

3

WILLBROS GROUP, INC.

Pro Forma Condensed Consolidated Statement of Operations

For the Nine Months Ended September 30, 2012

(In thousands, except share and per share amounts)

Unaudited

	Willbros as reported(a)			Pro forma adjustments			Willbros pro forma results
Contract revenue	$	1,372,121		$	—		$	1,372,121
Operating expenses:
Contract		1,242,871			—			1,242,871
Amortization of intangibles		11,216			—			11,216
General and administrative		108,942			—			108,942
		1,363,029			—			1,363,029
Operating income		9,092			—			9,092
Other expense:
Interest expense, net		(21,454	)		1,781	(e)		(19,673	)
Loss on early extinguishment of debt		(3,405	)		—			(3,405	)
Other, net		(449	)		—			(449	)
		(25,308	)		1,781			(23,527	)
Loss from continuing operations before income taxes		(16,216	)		1,781			(14,435	)
Provision for income taxes		3,078			—			3,078
Net loss from continuing operations	$	(19,294	)	$	1,781		$	(17,513	)
Basic loss per share:
Loss from continuing operations	$	(0.40	)	$	0.03		$	(0.37	)
Diluted loss per share:
Loss from continuing operations	$	(0.40	)	$	0.03		$	(0.37	)
Weighted average number of common shares outstanding:
Basic		47,965,380			47,965,380			47,965,380
Diluted		47,965,380			47,965,380			47,965,380

4

WILLBROS GROUP, INC.

Pro Forma Condensed Consolidated Statement of Operations

For the Year Ended December 31, 2012

(In thousands, except share and per share amounts)

Unaudited

	Willbros as reported(a)			Pro forma adjustments			Willbros pro forma results
Contract revenue	$	1,928,800		$	—		$	1,928,800
Operating expenses:
Contract		1,738,977			—			1,738,977
Amortization of intangibles		14,985			—			14,985
General and administrative		151,816			—			151,816
Goodwill impairment		8,067			—			8,067
Other charges		151			—			151
		1,913,996			—			1,913,996
Operating income		14,804			—			14,804
Other expense:
Interest expense, net		(29,393	)		2,375	(e)		(27,018	)
Loss on early extinguishment of debt		(3,405	)		—			(3,405	)
Other, net		(570	)		—			(570	)
		(33,368	)		2,375			(30,993	)
Loss from continuing operations before income taxes		(18,564	)		2,375			(16,189	)
Provision for income taxes		4,727			—			4,727
Net loss from continuing operations	$	(23,291	)	$	2,375		$	(20,916	)
Basic loss per share:
Loss from continuing operations	$	(0.49	)	$	0.05		$	(0.44	)
Diluted loss per share:
Loss from continuing operations	$	(0.49	)	$	0.05		$	(0.44	)
Weighted average number of common shares outstanding:
Basic		48,019,303			48,019,303			48,019,303
Diluted		48,019,303			48,019,303			48,019,303

5

WILLBROS GROUP, INC.

Pro Forma Condensed Consolidated Statement of Operations

For the Year Ended December 31, 2011

(In thousands, except share and per share amounts)

Unaudited

	Willbros as reported(a)			Pro forma adjustments		Willbros pro forma results
Contract revenue	$	1,376,369		$	—	$	1,376,369
Operating expenses:
Contract		1,249,025			—		1,249,025
Amortization of intangibles		15,108			—		15,108
General and administrative		127,383			—		127,383
Settlement of project dispute		8,236			—		8,236
Goodwill impairment		178,575			—		178,575
Changes in fair value of contingent earnout liability		(10,000	)		—		(10,000	)
Other charges		105			—		105
		1,568,432			—		1,568,432
Operating loss		(192,063	)		—		(192,063	)
Other expense:
Interest expense, net		(45,035	)		—		(45,035	)
Loss on early extinguishment of debt		(6,304	)		—		(6,304	)
Other, net		(539	)		—		(539	)
		(51,878	)		—		(51,878	)
Loss from continuing operations before income taxes		(243,941	)		—		(243,941	)
Benefit for income taxes		(33,558	)		—		(33,558	)
Net loss from continuing operations	$	(210,383	)	$	—	$	(210,383	)
Basic loss per share:
Loss from continuing operations	$	(4.43	)	$	—	$	(4.43	)
Diluted loss per share:
Loss from continuing operations	$	(4.43	)	$	—	$	(4.43	)
Weighted average number of common shares outstanding:
Basic		47,475,680			47,475,680		47,475,680
Diluted		47,475,680			47,475,680		47,475,680

6

WILLBROS GROUP, INC.

Pro Forma Condensed Consolidated Statement of Operations

For the Year Ended December 31, 2010

(In thousands, except share and per share amounts)

Unaudited

	Willbros as reported(a)			Pro forma adjustments		Willbros pro forma results
Contract revenue	$	1,003,409		$	—	$	1,003,409
Operating expenses:
Contract		886,952			—		886,952
Amortization of intangibles		9,437			—		9,437
General and administrative		106,086			—		106,086
Goodwill impairment		60,000			—		60,000
Changes in fair value of contingent earnout liability		(45,340	)		—		(45,340	)
Acquisition costs		10,055			—		10,055
Other charges		3,771			—		3,771
		1,030,961			—		1,030,961
Operating loss		(27,552	)		—		(27,552	)
Other expense:
Interest expense, net		(27,639	)		—		(27,639	)
Other, net		1,553			—		1,553
		(26,086	)		—		(26,086	)
Loss from continuing operations before income taxes		(53,638	)		—		(53,638	)
Benefit for income taxes		(28,951	)		—		(28,951	)
Net loss from continuing operations	$	(24,687	)	$	—	$	(24,687	)
Basic loss per share:
Loss from continuing operations	$	(0.58	)	$	—	$	(0.58	)
Diluted loss per share:
Loss from continuing operations	$	(0.58	)	$	—	$	(0.58	)
Weighted average number of common shares outstanding:
Basic		43,013,934			43,013,934		43,013,934
Diluted		43,013,934			43,013,934		43,013,934

7

Notes to unaudited pro forma condensed consolidated financial statements

(a) The Company’s historical consolidated financial information includes the results of the Disposition as a discontinued operation and the presentation of assets and liabilities held for sale.

(b) Reflects the elimination of the assets and liabilities of the Disposition classified as assets and liabilities held for sale.

(c) Represents estimated proceeds from the Disposition approximating $25.0 million. A portion of the estimated proceeds are secured by an irrevocable, unconditional letter of credit available to be drawn on January 2, 2014 with remaining amount held in escrow until final resolution of working capital adjustments. At this time, the Company expects to use the estimated proceeds to pay down existing debt in connection with its ABL Credit Facility (approximately $16.1 million) and its 2013 Term Loan Facility (approximately $8.9 million).

(d) Represents the recognition of the estimated gain on sale which would have been realized upon the Disposition had the transaction closed on September 30, 2013. Actual adjustments may differ from the information presented.

(e) Represents the reduction in interest expense from the application of the estimated proceeds from the Disposition to pay down existing debt had the transaction closed on January 1, 2012. The reduction in interest expense for the nine months ended September 30, 2012 and year ended December 31, 2012 is calculated by multiplying the estimated proceeds from the Disposition by the incremental borrowing rate of the Company’s outstanding debt that would be paid down as a result of the Disposition. The reduction in interest expense for the nine months ended September 30, 2013 is calculated by multiplying the estimated proceeds from the Disposition by the weighted average interest rate of the Company’s outstanding debt that would be paid down as a result of the Disposition.

8