SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 _______________________ FORM 8-K CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 _______________________ Date of Report (Date of earliest event reported): April 21, 1998 Interstate Energy Corporation (Exact name of registrant as specified in its charter) Wisconsin 1-9894 39-1380265 (State or other (Commission File (IRS Employer jurisdiction of Number) Identification No.) incorporation) 222 West Washington Avenue, Madison, Wisconsin 53703 (Address of principal executive offices, including zip code) (608) 252-3311 (Registrant's telephone number) WPL Holdings, Inc. (Former name or former address, if changed since last report) Item 2. Acquisition or Disposition of Assets. On April 21, 1998, following receipt of final regulatory approval, the three-way business combination (the "Merger") between WPL Holdings, Inc., a holding company incorporated under the laws of the State of Wisconsin ("WPLH"), IES Industries Inc., a holding company incorporated under the laws of the State of Iowa ("IES"), and Interstate Power Company, an operating public utility incorporated under the laws of the State of Delaware ("IPC"), was consummated in accordance with the terms of an Agreement and Plan of Merger, dated as of November 10, 1995 (as amended on May 22, 1996 and August 16, 1996) by and among WPLH, IES and IPC, among others (the "Merger Agreement"). In the Merger, WPLH, as the surviving holding company, changed its name to Interstate Energy Corporation (the "Company") and is currently doing business as Alliant Corporation. Pursuant to the terms of the Merger Agreement, IES was merged with and into the Company and each outstanding share of IES common stock was converted into the right to receive 1.14 shares of Company common stock. Similarly, an acquisition subsidiary of the Company was merged with and into IPC (with IPC as the surviving corporation) and each outstanding share of IPC common stock was converted into the right to receive 1.11 shares of Company common stock. At the effective time of the Merger, there were 30,761,923 and 9,768,907 shares of IES common stock and IPC common stock outstanding, respectively. All outstanding shares of WPLH common stock remain unchanged and outstanding as shares of Company common stock following the Merger. In this Current Report on Form 8-K, unless the context otherwise requires, all references to the Company's common stock include the rights to purchase shares of such common stock pursuant to the terms of the Rights Agreement between the Company and Morgan Shareholders Services Trust Company, as Rights Agent thereunder, dated as of February 22, 1989. As a result of the Merger, IES Utilities Inc. and IPC joined Wisconsin Power and Light Company as the operating public utility subsidiaries of the Company. The outstanding shares of preferred stock of IES Utilities Inc., IPC and Wisconsin Power and Light Company were unaffected by the Merger. In connection with the Merger, the Company filed an application to become and is now a registered public utility holding company under the Public Utility Holding Company Act of 1935, as amended. The Merger will be accounted for as a pooling of interests for accounting purposes. Following consummation of the Merger, the holding companies for the nonregulated businesses of the Company and IES were merged. The resulting company, known as Alliant Industries Inc., is now the parent holding company of substantially all of the Company's nonregulated businesses. The Merger Agreement and the amendments thereto are filed as exhibits to this Current Report on Form 8-K and are incorporated herein by reference. The discussion above is qualified in its entirety by reference to that agreement and the amendments thereto. In connection with the Merger, the Company entered into employment agreements (the "Employment Agreements") with (i) Lee Liu, who will serve as Chairman of the Board of the Company; and (ii) Erroll B. Davis, Jr., who will serve as President and Chief Executive Officer of the Company and as Chief Executive Officer of the Company's subsidiaries. It is anticipated that the Company will also enter into a consulting agreement with Wayne H. Stoppelmoor, who will serve as Vice Chairman of the Company. In addition, IPC entered into an employment agreement with Michael R. Chase, who will serve as President of IPC. The Employment Agreements are filed as exhibits to this Current Report on Form 8-K and are incorporated herein by reference. Pursuant to the terms of the Merger Agreement, the Board of Directors of the Company was reconstituted. The current directors of the Company are: Alan B. Arends Milton E. Neshek Erroll B. Davis, Jr. Jack R. Newman Rockne G. Flowers Judith D. Pyle Joyce L. Hanes Robert D. Ray Lee Liu David Q. Reed Katharine C. Lyall Robert W. Schlutz Arnold M. Nemirow Wayne H. Stoppelmoor Anthony R. Weiler The current executive officers of the Company are: Erroll B. Davis, Jr. - President and Chief Executive Officer William D. Harvey - Executive Vice President-Generation Thomas M. Walker - Executive Vice President and Chief Financial Officer Michael R. Chase - Executive Vice President- Corporate Services James E. Hoffman - Executive Vice President- Business Development Eliot G. Protsch - Executive Vice President-Energy Delivery John E. Ebright - Vice President-Controller Edward M. Gleason - Vice President, Treasurer and Corporate Secretary Donald D. Jannette - Assistant Corporate Secretary John E. Kratchmer - Assistant Controller Susan J. Kosmo - Assistant Controller Item 7. Financial Statements and Exhibits. (a) Financial Statements of Businesses Acquired (1) IES Industries Inc. Audited Consolidated Financial Statements (incorporated by reference to IES Industries Inc.'s Annual Report on Form 10-K for the fiscal year ended December 31, 1997 (Commission File No. 1-9187)): Report of Independent Public Accountants Consolidated Statements of Income for the years ended December 31, 1997, 1996 and 1995 Consolidated Balance Sheets as of December 31, 1997 and 1996 Consolidated Statements of Cash Flows for the years ended December 31, 1997, 1996 and 1995 Notes to Consolidated Financial Statements (2) Interstate Power Company Audited Financial Statements (incorporated by reference to Interstate Power Company's Annual Report on Form 10-K for the fiscal year ended December 31, 1997 (Commission File No. 1-3632)): Report of Independent Auditors Statements of Income for the years ended December 31, 1997, 1996 and 1995 Balance Sheets as of December 31, 1997 and 1996 Statements of Cash Flows for the years ended December 31, 1997, 1996 and 1995 Notes to Financial Statements (b) Pro Forma Financial Information The unaudited pro forma financial information included herein relates to the three-way business combination (the "Merger") between WPL Holdings, Inc., a holding company incorporated under the laws of the State of Wisconsin ("WPLH"), IES Industries Inc., a holding company incorporated under the laws of the State of Iowa ("IES"), and Interstate Power Company, an operating public utility incorporated under the laws of the State of Delaware ("IPC"), which was consummated on April 21, 1998. In the Merger, WPLH, as the surviving holding company, changed its name to Interstate Energy Corporation (the "Merged Company") and is currently doing business as Alliant Corporation. The unaudited pro forma combined balance sheet at December 31, 1997 gives effect to the Merger as if it had occurred on December 31, 1997. The unaudited pro forma combined statements of income for each of the three years in the period ended December 31, 1997 gives effect to the Merger as if it had occurred on January 1, 1995. These statements are prepared on the basis of accounting for the Merger as a pooling of interests and are based on the assumptions set forth in the notes thereto. In addition, the pro forma financial information does not give effect to the expected synergies resulting from the Merger or the costs to be incurred to achieve such synergies. The pro forma financial information, however, does reflect the transition costs to effect the Merger. The historical data for WPLH have been adjusted to reflect the restatement of such data to account for certain discontinued operations as discussed in Note 6. 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 WPLH, IES and IPC. The following information is not necessarily indicative of the financial position or operating results that would have occurred had the Merger been consummated on the date, or at the beginning of the period, for which the Merger is being given effect nor is it necessarily indicative of future operating results or financial position. INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED BALANCE SHEET 12/31/97 (In thousands) Pro Forma ASSETS WPLH IES IPC Adjustments Pro Forma (As Reported) (As Reported) (As Reported) (See Note 1) Combined UTILITY PLANT Electric $1,790,641 $2,072,866 $869,715 $- $4,733,222 Gas 237,856 187,098 70,201 - 495,155 Other 220,679 145,716 - - 366,395 ----------- --------- -------- -------- ---------- Total 2,249,176 2,405,680 939,916 - 5,594,772 Less: Accumulated provision for depreciation 1,065,726 1,115,261 450,595 - 2,631,582 Construction work in progress 42,312 38,923 5,276 - 86,511 Nuclear fuel--net 19,046 36,731 - - 55,777 ---------- -------- -------- --------- ---------- Net utility plant 1,244,808 1,366,073 494,597 - 3,105,478 OTHER PROPERTY, PLANT AND EQUIPMENT ---NET AND OTHER INVESTMENTS 139,548 319,657 4,746 (125) 463,826 CURRENT ASSETS Cash and cash equivalents 13,987 10,143 2,897 302 27,329 Accounts receivable --- net 78,082 52,295 27,061 12,489 169,927 Fossil fuel inventories, at average cost 18,857 10,579 11,220 - 40,656 Materials and supplies, at average cost 19,274 24,274 6,297 - 49,845 Prepayments and other 42,808 69,920 15,035 (3,278) 124,485 --------- ---------- -------- ------- -------- Total current assets 173,008 167,211 62,510 9,513 412,242 EXTERNAL DECOMMISSIONING FUND 112,356 77,882 - - 190,238 INVESTMENT IN MCLEODUSA INC. 0 326,582 1,440 - 328,022 DEFERRED CHARGES AND OTHER 192,087 199,814 75,456 (15,442) 451,915 ---------- --------- -------- ------- --------- TOTAL ASSET $1,861,807 $2,457,219 $638,749 ($6,054) $4,951,721 ========== ========= ======== ======= ========= CAPITALIZATION AND LIABILITIES CAPITALIZATION Common Stock Equity: Common stock $308 $- $34,163 ($33,706) $765 Other stockholders' equity 607,275 818,133 181,457 23,204 1,630,069 ---------- -------- -------- -------- --------- Total common stock equity 607,583 818,133 215,620 (10,502) 1,630,834 Preferred stock not mandatorily redeemable 59,963 18,320 10,819 - 89,102 Preferred stock mandatory sinking fund - - - - 24,267 Long-term debt---net 457,520 845,189 165,194 - 1,467,903 ---------- -------- -------- -------- ---------- Total capitalization 1,125,066 1,681,642 415,900 (10,502) 3,212,106 CURRENT LIABILITIES Current maturities, sinking funds, and capital lease obligations 11,528 13,684 6,314 - 31,526 Commercial paper, notes payable and other 123,095 - 33,500 - 156,595 Variable rate demand bonds 56,975 - - - 56,975 Accounts payable and accruals 91,175 78,702 13,208 9,549 192,634 Taxes accrued 412 62,432 16,014 65 78,923 Other accrued liabilities 55,987 67,174 12,445 15,532 151,138 --------- -------- -------- --------- ---------- Total current liabilities 339,172 221,992 81,481 25,146 667,791 OTHER LIABILITIES Deferred income taxes 253,519 372,837 104,670 (2,800) 728,226 Deferred investment tax credits 35,039 31,838 15,985 - 82,862 Accrued environmental remediation costs 9,238 46,989 5,794 - 62,021 Capital lease obligations - 23,548 86 - 23,634 Other liabilities and deferred credits 99,773 78,373 14,833 (17,898) 175,081 --------- --------- -------- --------- --------- Total other liabilities 397,569 553,585 141,368 (20,698) 1,071,824 --------- --------- -------- --------- ---------- TOTAL CAPITALIZATION AND LIABILITIES $1,861,807 $2,457,219 $638,749 ($6,054) $4,951,721 ========== ========== ======== ========== ========== See accompanying Notes to Unaudited Pro Forma Combined Financial Statements. INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME FOR THE YEAR ENDED DECEMBER 31, 1997 (In thousands, except per share amounts) Operating Revenues Pro Forma WPLH IES IPC Adjustments Pro Forma (As Reported) (As Reported) (As Reported) (See Note 1) Combined Electric utility $634,143 $604,270 $277,340 $- $1,515,753 Gas utility 155,883 183,517 54,507 - 393,907 Other 129,229 142,912 - 118,826 390,967 --------- --------- -------- -------- --------- Total operating revenues 919,255 930,699 331,847 118,826 2,300,627 Operating Expenses Electric and steam production fuels 116,812 108,344 55,402 - 280,558 Purchased power 125,438 74,098 56,770 - 256,306 Cost of gas sold 99,267 126,631 33,324 - 259,222 Other operation 254,796 231,481 64,685 119,306 670,268 Maintenance 48,058 57,185 17,782 96 123,121 Depreciation and amortization 111,289 114,122 31,676 245 257,332 Taxes other than income taxes 34,988 51,701 16,708 - 103,397 --------- --------- -------- -------- --------- Total operating expenses 790,648 763,562 276,347 119,647 1,950,204 --------- --------- -------- -------- --------- Operating Income 128,607 167,137 55,500 (821) 350,423 Other Income (Expense) Allowance for funds used during construction 2,775 2,309 190 - 5,274 Other income and deductions, net 4,432 1,850 6,772 856 13,910 --------- -------- -------- -------- --------- Total other income (expense) 7,207 4,159 6,962 856 19,184 Interest Charges 42,535 64,383 15,610 35 122,563 Income from Continuing Operations before Income Taxes and Preferred Dividends 93,279 106,913 46,852 - 247,044 Income Taxes 28,715 39,662 17,684 - 86,061 Preferred Dividends of Subsidiaries (Note 2) 3,310 914 2,469 - 6,693 --------- -------- -------- --------- --------- Income from Continuing Operations $61,254 $66,337 $26,699 $- $154,290 ========= ======== ======== ========= ========= Average Common Shares Outstanding 30,782 30,380 9,725 5,323 76,210 Earnings per Share of Common Stock from Continuing Operations (Basic and diluted) $1.99 $2.18 $2.74 N/A $2.02 ========= ======== ======== ========= ======== See accompanying Notes to Unaudited Pro Forma Combined Financial Statements. INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME FOR THE YEAR ENDED DECEMBER 31, 1996 (In thousands, except per share amounts) Pro Forma WPLH IES IPC Adjustments Pro Forma (As Reported) (As Reported) (As Reported) (See Note 1) Combined Operating Revenues Electric utility $589,482 $574,273 $276,620 $- $1,440,375 Gas utility 165,627 273,979 49,464 (113,115) 375,955 Other 177,735 125,660 - 113,115 416,510 --------- --------- --------- -------- ---------- Total operating revenues 932,844 973,912 326,084 - 2,232,840 Operating Expenses Electric and steam production fuels 114,470 84,579 57,560 - 256,609 Purchased power 81,108 88,350 61,556 - 231,014 Cost of gas sold 104,830 217,351 31,617 (113,474) 240,324 Other operation 317,608 212,501 51,707 113,474 695,290 Maintenance 46,492 49,001 16,164 - 111,657 Depreciation and amortization 90,683 107,393 31,087 - 229,163 Taxes other than income taxes 34,603 48,171 16,064 - 98,838 --------- -------- --------- -------- --------- Total operating expenses 789,794 807,346 265,755 - 1,862,895 --------- -------- --------- -------- --------- Operating Income 143,050 166,566 60,329 - 369,945 Other Income (Expense) Allowance for funds used during construction 3,208 2,103 263 - 5,574 Other income and deductions, net 14,098 (4,591) 2,336 - 11,843 --------- -------- --------- -------- --------- Total other income (expense) 17,306 (2,488) 2,599 - 17,417 Interest Charges 42,027 54,822 16,472 - 113,321 --------- -------- --------- --------- --------- Income from Continuing Operations before Income Taxes and Preferred Dividends 118,329 109,256 46,456 - 274,041 Income Taxes 41,814 47,435 18,133 - 107,382 Preferred Dividends of Subsidiaries (Note 2) 3,310 914 2,463 - 6,687 --------- -------- --------- --------- --------- Income from Continuing Operations (Notes 3 and 6) $73,205 $60,907 $25,860 $- $159,972 ========= ======== ========= ========= ========= Average Common Shares Outstanding 30,790 29,861 9,594 5,236 75,481 Earnings per Share of Common Stock from Continuing Operations (Basic and diluted) $2.38 $2.04 $2.69 N/A $2.12 ========= ======== ========= ========= ========= See accompanying Notes to Unaudited Pro Forma Combined Financial Statements. INTERSTATE ENERGY CORPORATION UNAUDITED PRO FORMA COMBINED STATEMENTS OF INCOME FOR THE YEAR ENDED DECEMBER 31, 1995 (In thousands, except per share amounts) Pro Forma WPLH IES IPC Adjustments Pro Forma (As Reported) (As Reported) (As Reported) (See Note 1) Combined Operating Revenues Electric utility $546,324 $560,471 $274,873 $- $1,381,668 Gas utility 139,165 190,339 43,669 (53,047) 320,126 Other 121,766 100,200 - 53,047 275,013 -------- -------- -------- -------- ---------- Total operating revenues 807,255 851,010 318,542 - 1,976,807 Operating Expenses Electric and steam production fuels 116,488 96,256 62,164 - 274,908 Purchased power 44,940 66,874 57,566 - 169,380 Cost of gas sold 84,002 141,716 25,888 (50,519) 201,087 Other operation 252,722 199,768 44,581 50,519 547,590 Maintenance 42,043 46,093 14,881 - 103,017 Depreciation and amortization 86,319 97,958 29,560 - 213,837 Taxes other than income taxes 34,188 49,011 15,990 - 99,189 -------- -------- -------- -------- --------- Total operating expenses 660,702 697,676 250,630 - 1,609,008 -------- -------- -------- -------- --------- Operating Income 146,553 153,334 67,912 - 367,799 Other Income (Expense) Allowance for funds used during construction 2,088 3,424 341 - 5,853 Other income and deductions, net 5,954 1,548 (4,008) - 3,494 -------- ------- ------- -------- --------- Total other income (expense) 8,042 4,972 (3,667) - 9,347 Interest Charges 43,559 50,727 17,136 - 111,422 -------- ------- ------- -------- --------- Income from Continuing Operations before Income Taxes and Preferred Dividends 111,036 107,579 47,109 - 265,724 Income Taxes 36,108 42,489 19,453 - 98,050 Preferred Dividends of Subsidiaries (Note 2) 3,310 914 2,458 - 6,682 -------- ------- ------- -------- -------- Income from Continuing Operations (Note 6) $71,618 $64,176 $25,198 $- $160,992 ======== ======= ======= ======== ======== Average Common Shares Outstanding 30,774 29,202 9,564 5,140 74,680 Earnings per Share of Common Stock from Continuing Operations (Basic and diluted) $2.33 $2.20 $2.63 N/A $2.16 ======== ======= ======= ======== ======== See accompanying Notes to Unaudited Pro Forma Combined Financial Statements INTERSTATE ENERGY CORPORATION NOTES TO UNAUDITED PRO FORMA COMBINED FINANCIAL STATEMENTS 1. Pro Forma Adjustments December 31, 1997 BALANCE SHEET Merged Company Consolidation Eliminations Common IPC IES Merger of for Stock Unbilled Pension Transaction Total IEA-HES LLC IEA-HES LLC Adjustment Revenues Liability Costs Pro Forma (Note 1 (a)) (Note 1 (b)) (Note 1 (c)) (Note 1 (d)) (Note 1 (e)) (Note 1 (g)) Adjustments ASSETS OTHER PROPERTY, PLANT AND EQUIP ---NET AND OTHER INVESTMENTS $3,458 ($3,583) $ - $ - $ - $ - ($125) CURRENT ASSETS Cash and cash equivalents 3,308 (3,006) - - - - 302 Accounts receivable ---net 8,932 (1,965) - 5,522 - - 12,489 Prepayments and other 2 - - (3,280) - - (3,278) -------- -------- -------- -------- -------- -------- -------- Total current assets 12,242 (4,971) - 2,242 - - 9,513 DEFERRED CHARGES AND OTHER - - - 2,456 (17,898) - (15,442) -------- -------- -------- -------- -------- -------- -------- TOTAL ASSETS $15,700 ($8,554) $ - $4,698 ($17,898) $ - ($6,054) ======== ======== ======== ======== ======== ======== ======== CAPITALIZATION AND LIABILITIES CAPITALIZATION Common Stock Equity: Common stock $ - $ - ($33,706) $ - $ - $ - ($33,706) Other stockholders' equity 3,583 (3,583) 33,706 4,698 - (15,200) 23,204 -------- -------- -------- -------- -------- --------- -------- Total common stock equity 3,583 (3,583) - 4,698 - (15,200) (10,502) CURRENT LIABILITIES Accounts payable and accruals 11,514 (1,965) - - - - 9,549 Taxes accrued 65 - - - - - 65 Other accrued liabilities 538 (3,006) - - - 18,000 15,532 -------- -------- -------- -------- -------- -------- -------- Total current liabilities 12,117 (4,971) - - - 18,000 25,146 OTHER LIABILITIES Deferred income taxes - - - - - (2,800) (2,800) Other liabilities and deferred credits - - - - (17,898) - (17,898) -------- -------- -------- -------- -------- -------- -------- Total other liabilities - - - - (17,898) (2,800) (20,698) -------- -------- -------- -------- -------- -------- -------- TOTAL CAPITALIZATION AND LIAB. $15,700 ($8,554) $ - $4,698 ($17,898) $ - ($6,054) ======== ======== ======== ======== ======== ======== ======== Merged 1997 INCOME STATEMENT Consolidation Eliminations Company of for Common Stock Total IEA-HES LLC IEA-HES LLC Adjustment Pro Forma (Note 1 (a)) (Note 1 (b)) (Note 1 (c)) Adjustments OPERATING REVENUES: Gas utility $ - $ - $ - $ - Other 118,826 - - 118,826 ------- ------- -------- ------- Total operating revenues 118,826 - - 118,826 OPERATING EXPENSES: Cost of gas sold - - - - Other operation 119,306 - - 119,306 Maintenance 96 - - 96 Depreciation and amortization 245 - - 245 ------- -------- -------- ------- Total operating expenses 119,647 - - 119,647 OPERATING INCOME (821) - - (821) OTHER INCOME (EXPENSE) Other income and deductions, net 61 795 - 856 ------- -------- -------- -------- Total other income (expense) 61 795 - 856 INTEREST CHARGES 35 - - 35 ------- -------- -------- -------- INCOME FROM CONTINUING OPER. ($795) $795 $ - $ - ======= ======== ======== ======== AVERAGE COMMON SHARES - - 5,323 5,323 1996 INCOME STATEMENT Merged Company Common Stock IEA Total Adjustment Gas Activity Pro Forma (Note 1 (c)) (Note 1 (f)) Adjustments OPERATING REVENUES: Gas utility $ - ($113,115) ($113,115) Other - 113,115 113,115 ------- --------- --------- Total operating revenues - - - OPERATING EXPENSES: Cost of gas sold - (113,474) (113,474) Other operation - 113,474 113,474 -------- -------- --------- Total operating expenses - - - -------- -------- --------- INCOME FROM CONTINUING OPERATIONS $ - $ - $ - ======== ======== ========= AVERAGE COMMON SHARES 5,236 - 5,236 1995 INCOME STATEMENT Merged Company Common Stock IEA Total Adjustment Gas Activity Pro Forma (Note 1 (c)) (Note 1 (f)) Adjustments OPERATING REVENUES: Gas utility $ - ($53,047) ($53,047) Other - 53,047 53,047 -------- -------- --------- Total operating revenues - - - OPERATING EXPENSES: Cost of gas sold - (50,519) (50,519) Other operation - 50,519 50,519 -------- -------- --------- Total operating expenses - - - -------- -------- --------- INCOME FROM CONTINUING OPERATIONS $ - $ - $ - ======== ======== ========= AVERAGE COMMON SHARES 5,140 - 5,140 (a) Consolidation of IEA-HES L.L.C. In January 1997, IES and WPLH formed a gas marketing joint venture named IEA-HES L.L.C. Pursuant to the applicable accounting rules, IES and WPLH each accounted for this joint venture in 1997 under the equity method of accounting with their investment recorded on the balance sheet in "Other Property, Plant and Equipment -- Net and Other Investments" and their allocated portion of earnings on the income statement in "Other Income and Deductions, Net". This pro forma adjustment reflects the financial results of IEA-HES L.L.C. as a consolidated subsidiary. (b) Eliminations for IEA-HES L.L.C. This pro forma adjustment reflects the elimination of intercompany balances of IEA-HES L.L.C. and also eliminates the equity investments of IES and WPLH and their allocated portion of revenues and expenses. (c) Merged Company Common Stock Adjustment The pro forma combined financial statements reflect the conversion of each share of IES Common Stock (no par value) outstanding into 1.14 shares of Merged Company Common Stock ($.01 par value) and the conversion of each share of IPC Common Stock ($3.50 par value) into 1.11 shares of Merged Company Common Stock ($.01 par value), and the continuation of each share of WPLH Common Stock ($.01 par value) outstanding as one share of Merged Company Common Stock, as provided in the Merger Agreement. The pro forma adjustment to common stock equity restates the common stock account to equal par value for all shares to be issued ($.01 par value per share of Merged Company Common Stock) and reclassifies the excess to other stockholders' equity. The average number of shares of common stock used for calculating per share amounts is based on the exchange ratios shown below. As As Exchange reported Pro forma As Reported Pro forma reported Pro forma Ratio 12/31/97 12/31/97 12/31/96 12/31/96 12/31/95 12/31/95 WPLH N/A 30,782 30,782 30,790 30,790 30,774 30,774 IES 1.14 30,380 34,633 29,861 34,042 29,202 33,290 IPC 1.11 9,725 10,795 9,594 10,649 9,564 10,616 The number of shares of common stock at December 31, 1997 used for calculating the par value of common stock is based on the exchange ratios shown below. As Exchange reported Pro forma Ratio 12/31/97 12/31/97 WPLH N/A 30,789 30,789 IES 1.14 30,577 34,858 IPC 1.11 9,761 10,835 (d) IPC Unbilled Revenues The financial results of IPC do not include accrued revenues for services rendered but unbilled at month-end. The pro forma adjustment reflects the impact of adopting unbilled revenues, including the tax impact of the adoption. The change is being implemented to conform to the method currently utilized by WPLH and IES. (e) IES Pension Liability The accrued pension liability (and offsetting regulatory asset), included in the financial results of IES, was calculated using a five-year smoothed method of recognizing deferred asset gains. The pro forma adjustment reflects a change to the straight market value method which recognizes deferred asset gains sooner. The change is being implemented to conform to the method currently utilized by WPLH and IPC. (f) IEA Gas Activity The gas revenues and cost of gas sold of Industrial Energy Applications, Inc. (IEA), a subsidiary of IES, for 1996 and 1995 have been reclassed into "Other" operating revenues and "Other operation" expenses, respectively, consistent with the 1997 presentation. (g) Merger Transaction Costs The merger partners estimate they will incur an additional $18 million of merger-related transaction costs in the first six months of 1998. These costs include fees for financial advisors, attorneys and accountants as well as separation costs relating to various officers of the merger partners who have left the company under the terms of their respective change of control agreements. These costs have been reflected in the pro forma balance sheet at December 31, 1997 such that accrued liabilities have been increased by $18 million, other stockholders' equity has been reduced by the net of tax amount and the applicable income tax deduction has been recorded in deferred income taxes. 2. Preferred Stock Dividends of IPC The Preferred Stock Dividends of IPC have been reclassified in the unaudited pro forma combined statements as "Preferred Dividends of Subsidiaries" and deducted in the determination of income from continuing operations which reflects the holding company structure of the Merged Company. 3. Nonrecurring Material Items Included in Historical Financial Results IES's income from continuing operations for the year ended December 31, 1996 included costs incurred relating to its successful defense of a hostile takeover attempt mounted by MidAmerican Energy Company. The after-tax impact on income from continuing operations was a decrease of $4.6 million. Nonrecurring items affecting WPLH's performance for the year ended December 31, 1996 included the impact of the sale of a combustion turbine and the sale of WPLH's assisted-living real estate investments. The after-tax impact of these items on continuing operations was an increase of $5.9 million. 4. Estimated Costs and Cost Savings of Proposed Merger The allocation between WPLH, IES and IPC and their customers of the estimated cost savings of approximately $749 million over ten years resulting from the Merger, net of the costs incurred to achieve such savings, will be subject to regulatory review and approval. Costs arising from the Merger are currently estimated to be approximately $78 million. Approximately $22 million of these costs had been incurred through December 31, 1997 and are reflected in results of operations. The estimate of potential cost savings constitutes a forward-looking statement and actual results may differ materially from this estimate. The estimate is necessarily based upon various assumptions that involve judgments with respect to, among other things, future national and regional economic and competitive conditions, technological developments, inflation rates, regulatory treatment, weather conditions, financial market conditions, future business decisions and other uncertainties. No assurance can be given that the estimated cost savings will actually be realized. None of the estimated cost savings have been reflected in the unaudited pro forma combined financial statements. The only merger-related costs that have been reflected in the pro forma combined financial statements are the $22 million of costs incurred through December 31, 1997 and the $18 million of transaction costs discussed in Note 1(g). The remaining costs to be incurred to achieve the cost savings have not been included in the pro forma combined financial statements. 5. Intercompany Transactions Intercompany transactions (including purchased and exchange power transactions) between WPLH, IES and IPC during the periods presented were included in the determination of regulated rates and/or were not material. Accordingly, no pro forma adjustments were made to eliminate such transactions. 6. Discontinued Operations The financial statements of WPLH reflect the discontinuance of operations of its utility energy and marketing consulting business in 1995. The discontinuance of this business resulted in a pre-tax loss in the fourth quarter of 1995 of $7.7 million. The after-tax loss on disposition was $11.0 million reflecting the associated tax expense on disposition due to the non-deductibility of the carrying value of goodwill at sale. During 1996, WPLH recognized an additional loss of $1.3 million, net of applicable income tax benefit, associated with the final disposition of the business. Operating revenues, operating expenses, other income and expense and income taxes for the discontinued operations for the time periods presented have been excluded from income from continuing operations. Interest expense has been adjusted for the amounts associated with direct obligations of the discontinued operations. (c) Exhibits. The exhibits listed in the accompanying Exhibit Index are filed as part of this Current Report on Form 8-K. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. INTERSTATE ENERGY CORPORATION Date: May 5, 1998. By: /s/ Thomas M. Walker Thomas M. Walker Executive Vice President and Chief Financial Officer INTERSTATE ENERGY CORPORATION EXHIBIT INDEX TO FORM 8-K Dated April 21, 1998 Exhibit (2.1) Agreement and Plan of Merger, dated as of November 10, 1995, by and among WPL Holdings, Inc., IES Industries Inc., Interstate Power Company and AMW Acquisition, Inc. [Incorporated by reference to Exhibit (2.1) to WPL Holdings, Inc.'s Current Report on Form 8-K, dated November 10, 1995] (2.2) Amendment No. 1 to Agreement and Plan of Merger and Stock Option Agreements, dated as of May 22, 1996, by and among WPL Holdings, Inc., IES Industries Inc., Interstate Power Company, a Delaware corporation, AMW Acquisition, Inc., WPLH Acquisition Co. and Interstate Power Company, a Wisconsin corporation [Incorporated by reference to Exhibit (2.1) to WPL Holdings, Inc.'s Current Report on Form 8-K, dated May 22, 1996] (2.3) Amendment No. 2 to Agreement and Plan of Merger, dated as of August 16, 1996, by and among WPL Holdings, Inc., IES Industries Inc., Interstate Power Company, a Delaware corporation, WPLH Acquisition Co. and Interstate Power Company, a Wisconsin corporation [Incorporated by reference to Exhibit (2.1) to WPL Holdings, Inc.'s Current Report on Form 8-K, dated August 16, 1996.] (3.1) Amendments to the Restated Articles of Incorporation of Interstate Energy Corporation (3.2) Restated Articles of Incorporation of Interstate Energy Corporation, as amended (3.3) By-laws of Interstate Energy Corporation (10.1) Employment Agreement, dated as of April 21, 1998, by and between Interstate Energy Corporation and Erroll B. Davis, Jr. (10.2) Employment Agreement, dated as of April 21, 1998, by and between Interstate Energy Corporation and Lee Liu (10.3) Employment Agreement, dated as of April 21, 1998, by and between Interstate Power Company and Michael R. Chase (23.1) Consent of Arthur Andersen LLP, IES Industries Inc.'s independent public accountants (23.2) Consent of Deloitte & Touche, Interstate Power Company's independent public accountants