Exhibit 99.04 UNAUDITED PRO FORMA FINANCIAL INFORMATION The following unaudited pro forma financial information adjusts the historical consolidated balance sheet and statements of income of NSP after giving effect to their proposed business combination transaction with WEC (the Transaction) to form Primergy and a new subsidiary structure. The unaudited pro forma condensed balance sheet at Dec. 31, 1996 gives effect to the Transaction as if it had occurred on that date. The unaudited pro forma condensed statements of income for each of the three years in the period ended Dec. 31, 1996 give effect to the Transaction as if it had occurred at Jan. 1, 1994. These statements are prepared on the basis of accounting for the Transaction as a pooling of interests and are based on the assumptions set forth in the notes thereto. The following pro forma financial information has been prepared from, and should be read in conjunction with, the historical consolidated financial statements and related notes thereto of NSP. The following information is not necessarily indicative of the financial position or operating results that would have occurred had the Transaction been consummated on the date, or at the beginning of the periods, for which the Transaction is being given effect nor is it necessarily indicative of future operating results or financial position. Completion of the Transaction is subject to numerous conditions, many of which are beyond NSP's control. New NSP Pro Forma Condensed Information The pro forma financial information adjusts the historical financial statements of NSP after giving effect to the Transaction, including the reincorporation of NSP in Wisconsin, the merger of the Wisconsin Company into Wisconsin Energy Company, and the transfer of ownership of all of the current NSP subsidiaries to Primergy. NEW NSP UNAUDITED PRO FORMA CONDENSED STATEMENT OF INCOME TWELVE MONTHS ENDED DECEMBER 31, 1996 (In thousands) Pro Forma Adjustments NSP See Reincorp. NSP-W All Pro Forma (As Reported) Note Merger Divestiture Other Total New NSP Utility Operating Revenues Electric $2,127,413 2,4 $0 ($377,073) $256,418 ($120,655) $2,006,758 Gas 526,793 2,4 0 (88,756) (11,457) (100,213) 426,580 Total Operating Revenues 2,654,206 0 (465,829) 244,961 (220,868) 2,433,338 Utility Operating Expenses Electric Production-Fuel and Purchased Power 541,267 2,4 0 (178,657) 218,719 40,062 581,329 Cost of Gas Sold & Transported 335,453 2,4 0 (58,347) 7,499 (50,848) 284,605 Other Operation 554,946 2,4 0 (77,851) 31,500 (46,351) 508,595 Maintenance 155,830 2 0 (19,617) (1,831) (21,448) 134,382 Depreciation and Amortization 306,432 2 0 (35,731) (1,201) (36,932) 269,500 Taxes Other Than Income Taxes 232,824 2 0 (14,332) (1,548) (15,880) 216,944 Income Taxes 161,410 2 0 (24,688) (1,558) (26,246) 135,164 Total Operating Expenses 2,288,162 0 (409,223) 251,580 (157,643) 2,130,519 Utility Operating Income 366,044 0 (56,606) (6,619) (63,225) 302,819 Other Income (Expense) Equity Earnings of Unconsolidated Investees 31,025 2 0 (358) (30,667) (31,025) 0 Other Income and Deductions - Net 8,169 2,3 0 (658) (1,700) (2,358) 5,811 Total Other Income (Expense) 39,194 0 (1,016) (32,367) (33,383) 5,811 Income before Interest Charges 405,238 0 (57,622) (38,986) (96,608) 308,630 Interest Charges 130,699 2,3 0 (18,925) (20,977) (39,902) 90,797 Net Income 274,539 0 (38,697) (18,009) (56,706) 217,833 Preferred Dividends 12,245 0 0 0 0 12,245 Earnings Available for Common Stockholders $262,294 $0 ($38,697) ($18,009) ($56,706) $205,588 See accompanying notes to unaudited pro forma New NSP condensed financial statements. NEW NSP UNAUDITED PRO FORMA CONDENSED STATEMENT OF INCOME TWELVE MONTHS ENDED DECEMBER 31, 1995 (In thousands) Pro Forma Adjustments NSP See Reincorp. NSP-W All Pro Forma (As Reported) Note Merger Divestiture Other Total New NSP Utility Operating Revenues Electric $2,142,770 2,4 $0 ($381,040) $258,101 ($122,939) $2,019,831 Gas 425,814 2,4 0 (78,058) (11,674) (89,732) 336,082 Total Operating Revenues 2,568,584 0 (459,098) 246,427 (212,671) 2,355,913 Utility Operating Expenses Electric Production-Fuel and Purchased Power 570,245 2,4 0 (178,446) 221,962 43,516 613,761 Cost of Gas Sold & Transported 256,758 2,4 0 (52,356) 4,466 (47,890) 208,868 Other Operation 560,734 2,4 0 (79,472) 31,084 (48,388) 512,346 Maintenance 158,203 2 0 (20,780) (1,777) (22,557) 135,646 Depreciation and Amortization 290,184 2 0 (33,097) (1,128) (34,225) 255,959 Taxes Other Than Income Taxes 239,433 2 0 (14,109) (1,837) (15,946) 223,487 Income Taxes 147,148 2 0 (24,662) (1,032) (25,694) 121,454 Total Operating Expenses 2,222,705 0 (402,922) 251,738 (151,184) 2,071,521 Utility Operating Income 345,879 0 (56,176) (5,311) (61,487) 284,392 Other Income (Expense) Equity Earnings of Unconsolidated Investees 59,067 2 0 (1,162) (57,905) (59,067) 0 Other Income and Deductions - Net (6,261) 2,3 0 (981) 17,867 16,886 10,625 Total Other Income (Expense) 52,806 0 (2,143) (40,038) (42,181) 10,625 Income before Interest Charges 398,685 0 (58,319) (45,349) (103,668) 295,017 Interest Charges 122,890 2,3 0 (19,102) (11,629) (30,731) 92,159 Net Income 275,795 0 (39,217) (33,720) (72,937) 202,858 Preferred Dividends 12,449 0 0 0 0 12,449 Earnings Available for Common Stockholders $263,346 $0 ($39,217) ($33,720) ($72,937) $190,409 See accompanying notes to unaudited pro forma New NSP condensed financial statements. NEW NSP UNAUDITED PRO FORMA CONDENSED STATEMENT OF INCOME TWELVE MONTHS ENDED DECEMBER 31, 1994 (In thousands) Pro Forma Adjustments NSP See Reincorp. NSP-W All Pro Forma (As Reported) Note Merger Divestiture Other Total New NSP Utility Operating Revenues Electric $2,066,644 2,4 $0 ($375,105) $260,720 ($114,385) $1,952,259 Gas 419,903 2,4 0 (76,715) (12,485) (89,200) 330,703 Total Operating Revenues 2,486,547 0 (451,820) 248,235 (203,585) 2,282,962 Utility Operating Expenses Electric Production-Fuel and Purchased Power 570,880 2,4 0 (179,558) 223,109 43,551 614,431 Cost of Gas Sold & Transported 263,905 2,4 0 (53,484) 2,657 (50,827) 213,078 Other Operation 535,706 2,4 0 (77,958) 31,168 (46,790) 488,916 Maintenance 170,145 2 0 (22,385) (1,344) (23,729) 146,416 Depreciation and Amortization 273,801 2 0 (30,774) (1,016) (31,790) 242,011 Taxes Other Than Income Taxes 234,564 2 0 (13,710) (1,905) (15,615) 218,949 Income Taxes 129,228 2 0 (19,077) (1,046) (20,123) 109,105 Total Operating Expenses 2,178,229 0 (396,946) 251,623 (145,323) 2,032,906 Utility Operating Income 308,318 0 (54,874) (3,388) (58,262) 250,056 Other Income (Expense) Equity Earnings of Unconsolidated Investees 41,709 2 0 (429) (41,280) (41,709) 0 Other Income and Deductions - Net 663 2,3 0 (816) 2,931 2,115 2,778 Total Other Income (Expense) 42,372 0 (1,245) (38,349) (39,594) 2,778 Income before Interest Charges 350,690 0 (56,119) (41,737) (97,856) 252,834 Interest Charges 107,215 2,3 0 (17,574) (9,829) (27,403) 79,812 Net Income 243,475 0 (38,545) (31,908) (70,453) 173,022 Preferred Dividends 12,364 0 0 0 0 12,364 Earnings Available for Common Stockholders $231,111 $0 ($38,545) ($31,908) ($70,453) $160,658 See accompanying notes to unaudited pro forma New NSP condensed financial statements. NEW NSP UNAUDITED PRO FORMA CONDENSED BALANCE SHEET DECEMBER 31, 1996 (In thousands) Pro Forma Adjustments NSP See Reincorp. NSP-W All Pro Forma (As Reported) Note Merger Divestiture Other Total New NSP ASSETS UTILITY PLANT Electric $6,766,896 2 $0 ($894,143) $0 ($894,143) $5,872,753 Gas 750,449 2,5 0 (99,817) (121,936) (221,753) 528,696 Other 331,441 2 0 (67,262) 0 (67,262) 264,179 Total 7,848,786 0 (1,061,222) (121,936) (1,183,158) 6,665,628 Accumulated provision for depreciation (3,611,244) 2,5 0 395,619 76,487 472,106 (3,139,138) Nuclear fuel - net 100,338 0 0 0 0 100,338 Net utility plant 4,337,880 0 (665,603) (45,449) (711,052) 3,626,828 CURRENT ASSETS Cash and cash equivalents 51,118 2 0 (208) (33,281) (33,489) 17,629 Accounts receivable - net 371,654 2,3,4 0 (40,250) (31,268) (71,518) 300,136 Accrued utility revenues 147,366 2 0 (21,074) 0 (21,074) 126,292 Fossil fuel inventories 45,013 2 0 (7,780) 0 (7,780) 37,233 Material & supplies inventories 109,425 2 0 (5,918) (2,901) (8,819) 100,606 Prepayments and other 72,647 2 0 (11,703) (24,130) (35,833) 36,814 Total current assets 797,223 0 (86,933) (91,580) (178,513) 618,710 OTHER ASSETS Regulatory assets 354,128 2 0 (37,102) (475) (37,577) 316,551 External decommissioning fund 260,756 0 0 0 0 260,756 Investments in non-regulated projects and other investments 451,223 2,3 0 (7,433) (409,134) (416,567) 34,656 Non-regulated property - net 192,790 2 0 (2,799) (165,898) (168,697) 24,093 Intangible assets and other 242,900 2 0 (9,261) (123,806) (133,067) 109,833 Total other assets 1,501,797 0 (56,595) (699,313) (755,908) 745,889 TOTAL ASSETS $6,636,900 $0 ($809,131) ($836,342)($1,645,473) $4,991,427 LIABILITIES AND EQUITY CAPITALIZATION Common stock $172,659 1,2 $0 ($86,200) $86,200 $0 $172,659 Other stockholders' equity 1,963,221 1,2 0 (245,212) (567,374) (812,586) 1,150,635 Total common stock equity 2,135,880 0 (331,412) (481,174) (812,586) 1,323,294 Cumulative preferred stock and premium 240,469 0 0 0 0 240,469 Long-term debt 1,592,568 2,3 0 (231,688) (281,972) (513,660) 1,078,908 Total capitalization 3,968,917 0 (563,100) (763,146) (1,326,246) 2,642,671 CURRENT LIABILITIES Current portion of long-term debt 261,218 2 0 0 (16,253) (16,253) 244,965 Short-term debt 368,367 2,3 0 (39,300) (6,436) (45,736) 322,631 Accounts payable 236,341 2,4 0 (16,493) (21,251) (37,744) 198,597 Taxes accrued 204,348 2 0 (1,641) (6,339) (7,980) 196,368 Other accrued liabilities 166,126 2 0 (31,978) 719 (31,259) 134,867 Total current liabilities 1,236,400 0 (89,412) (49,560) (138,972) 1,097,428 OTHER LIABILITIES Deferred income taxes 804,342 2 0 (100,898) (9,656) (110,554) 693,788 Deferred investment tax credits 149,606 2 0 (20,024) (1,853) (21,877) 127,729 Regulatory liabilities 302,647 2 0 (19,409) (35) (19,444) 283,203 Other liabilities and deferred credits 174,988 2 0 (16,288) (12,092) (28,380) 146,608 Total other liabilities 1,431,583 0 (156,619) (23,636) (180,255) 1,251,328 TOTAL LIABILITIES AND EQUITY $6,636,900 $0 ($809,131) ($836,342)($1,645,473) $4,991,427 See accompanying notes to unaudited pro forma New NSP condensed financial statements. NEW NSP NOTES TO UNAUDITED PRO FORMA CONDENSED FINANCIAL STATEMENTS 1. NSP common stock with a $2.50 par value will be canceled and replaced with common stock of New NSP, which will be issued to Primergy, with the same $2.50 par value. As a result, no pro forma adjustments were necessary for stock activity related to the Transaction. 2. Subsidiary assets, liabilities, equity and results of operations have been eliminated from consolidated NSP amounts to reflect the merger of NSP-W into Wisconsin Energy Company and the transfer of ownership and control of all other subsidiaries from NSP to Primergy. Primergy's equity investment in New NSP is assumed to reflect the reduction in net assets related to the merger of NSP-W into Wisconsin Energy Company and transfer of investments in other subsidiaries from NSP to Primergy. 3. NSP financing of subsidiary capital and cash flow requirements has been adjusted to reflect the transfer of such items to Primergy. Pro forma adjustments reflect the elimination of (a) notes receivable and advances from subsidiaries; (b) NSP debt incurred to finance the notes and advances; (c) interest income earned on the notes and advances; and (d) interest expense accrued on the debt incurred to finance the notes and advances. 4. After the Transaction, NSP will not retain ownership of subsidiaries currently being consolidated. Consequently, intercompany transactions between NSP and its current subsidiaries have not been eliminated in the pro forma financial statements. The most significant intercompany transactions are power sales to and purchases from the Wisconsin Company pursuant to an interchange agreement with NSP. The interchange pricing and cost sharing arrangements are expected to be restructured as a result of the Transaction. However, at this time the amount of any changes to interchange power purchases or sales cannot be estimated. Consequently, no pro forma adjustments have been made to operating revenues, operating expenses, or accounts receivable from (or payable to) associated companies for the effects of interchange restructuring. 5. The Merger Agreement provides that certain gas utility properties and operations in Wisconsin (currently owned by the Wisconsin Company) will be transferred to New NSP as part of the Transaction. Pro forma adjustments have not been made for this transfer due to immateriality. As of Dec. 31, 1996, the properties to be transferred include utility plant with a net book value of approximately $20 million. For the years ended Dec. 31, 1996, 1995 and 1994, the operations to be transferred generated revenues of approximately $32 million, $29 million and $27 million, respectively. The amount of related operating expenses have not been quantified. This transfer is to ensure compliance with certain provisions of the Wisconsin Holding Company Act. The assets and liabilities to be transferred are expected to relate to gas utility properties directly contiguous to NSP's utility service territory in Minnesota. 6. Certain reclassifications have been made to the 1995 and 1994 NSP Wisconsin Company financial statements to conform with the 1996 presentation. These classifications had no effect on net income or earnings per share. 7. The allocation between NSP and WEC and their customers of the estimated cost savings resulting from the Transaction, net of the costs incurred to achieve such savings, will be subject to regulatory review and approval. None of these estimated cost savings, the costs to achieve such savings, or the transaction costs have been reflected in the pro forma condensed financial statements.