Exhibit 99.1 UNAUDITED PRO FORMA CONSOLIDATED CONDENSED FINANCIAL INFORMATION KEYSPAN ENERGY CORP/LILCO COMBINATION AND LIPA TRANSACTION The following unaudited pro forma financial information reflects adjustments to the historical financial statements of LILCO to give effect to the proposed transfer of LILCO's gas and generation business to subsidiaries of the newly formed Holding Company (Holding Company), the proposed stock acquisition of LILCO by a wholly owned subsidiary of LIPA and the proposed Combination between KeySpan Energy Corporation (KeySpan) and LILCO (Combination). The unaudited pro forma consolidated condensed balance sheet at December 31, 1997 gives effect to the proposed LIPA Transaction and the Combination as if they had occurred at December 31, 1997. The unaudited pro forma consolidated condensed statement of income for the twelve month period ended December 31, 1997 gives effect to the proposed LIPA Transaction and the Combination as if they had occurred at January 1, 1997. These statements are prepared on the basis of accounting for the Combination under the purchase method of accounting and are based on the assumptions set forth in the notes thereto. In April 1997 LILCO changed its year-end from December 31 to March 31. 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 KeySpan and LILCO. The following information is not necessarily indicative of the financial position or operating results that would have occurred had the proposed LIPA Transaction and the Combination been consummated on the date, or at the beginning of the period, for which the proposed LIPA Transaction and the Combination are being given effect nor is it necessarily indicative of future operating results or financial position. 5 KEYSPAN/LILCO HOLDING CORP. UNAUDITED PRO FORMA CONSOLIDATED CONDENSED BALANCE SHEET December 31, 1997 (In Millions) LILCO Adjustments Adjusted Sale to Pro Forma (Historical) LILCO LIPA (1) Adjustments ---------- --------- --------- --------- ---------- ASSETS Property Utility plant Electric $ 4,005.9 $ - $ 4,005.9 $ 2,911.4 $ - Gas 1,218.7 - 1,218.7 - - Common 286.4 - 286.4 - - Construction work in progress 116.1 - 116.1 42.0 - Nuclear fuel in process and in reactor 16.2 - 16.2 16.2 - Less - Accumulated depreciation and amortization (1,847.8) - (1,847.8) (933.3) - ---------- --------- --------- --------- ---------- Total Utility Net Plant 3,795.5 0.0 3,795.5 2,036.3 0.0 Gas exploration and production - - 0.0 - - Less - Accumulated depletion - - 0.0 - - ---------- --------- --------- --------- ---------- Total Property 3,795.5 0.0 3,795.5 2,036.3 0.0 ---------- --------- --------- --------- ---------- Cost in excess of net assets acquired (Goodwill) - - 0.0 - - ---------- --------- --------- --------- ---------- Regulatory Assets Base financial component(less accum. amortization of $858.2) 3,180.6 - 3,180.6 3,180.6 - Rate moderation component 385.5 - 385.5 385.5 - Shoreham post-settlement cost 1,003.6 - 1,003.6 1,003.6 - Regulatory tax asset 1,746.9 - 1,746.9 1,724.4 - Postretirement benefits other than pensions 346.1 - 346.1 - (292.2)(2) Other 422.1 - 422.1 347.8 - ---------- --------- --------- --------- ---------- Total Regulatory Assets 7,084.8 0.0 7,084.8 6,641.9 (292.2) ---------- --------- --------- --------- ---------- Nonutility Property and Other Investments 49.9 - 49.9 17.7 - ---------- --------- --------- --------- ---------- Current Assets Cash and cash equivalents 180.0 75.0 (10) 255.0 75.0 2,477.6 (3) Accounts receivable and accrued revenues 463.4 - 463.4 314.0 19.4 (2) Deferred tax asset 11.3 - 11.3 - 119.0 (4) Other current assets 252.6 - 252.6 55.1 - ---------- --------- --------- --------- ---------- Total Current Assets 907.3 75.0 982.3 444.1 2,616.0 ---------- --------- --------- --------- ---------- Deferred Charges 70.2 - 70.2 46.8 - Contractual receivable from LIPA - - 0.0 - 272.8 (2) ---------- --------- --------- --------- ---------- Total Assets $ 11,907.7 $ 75.0 $ 11,982.7 $ 9,186.8 $ 2,596.6 ========== ========= ========= ========= ========== See accompanying Notes to Unaudited Pro Forma Consolidated Condensed Financial Statements 6 KEYSPAN/LILCO HOLDING CORP. UNAUDITED PRO FORMA CONSOLIDATED CONDENSED BALANCE SHEET December 31, 1997 (In Millions) NEWCO before KeySpan Pro Forma NEWCO KeySpan (Historical) Adjustments Pro Forma ---------- ------------ ----------- ---------- ASSETS Property Utility plant Electric $ 1,094.5 $ - $ - $ 1,094.5 Gas 1,218.7 1,855.7 - 3,074.4 Common 286.4 - - 286.4 Construction work in progress 74.1 - - 74.1 Nuclear fuel in process and in reactor 0.0 - - 0.0 Less - Accumulated depreciation and amortization (914.5) (461.6) - (1,376.1) ---------- ----------- --------- --------- Total Utility Net Plant 1,759.2 1,394.1 0.0 3,153.3 Gas exploration and production 0.0 684.0 - 684.0 Less - Accumulated depletion 0.0 (237.1) - (237.1) ---------- ----------- --------- ----------- Total Property 1,759.2 1,841.0 0.0 3,600.2 ---------- ----------- --------- ----------- Cost in excess of net assets acquired (Goodwill) 0.0 - 241.0 (6) 241.0 ---------- ----------- --------- ----------- Regulatory Assets Base financial component(less accum. amortization of $858.2) 0.0 - - 0.0 Rate moderation component 0.0 - - 0.0 Shoreham post-settlement cost 0.0 - - 0.0 Regulatory tax asset 22.5 - 68.7 (5) 91.2 Postretirement benefits other than pensions 53.9 - - 53.9 Other 74.3 - 29.4 (6) 103.7 --------- ------------ --------- --------- Total Regulatory Assets 150.7 0.0 98.1 248.8 --------- ------------ --------- --------- Nonutility Property and Other Investments 32.2 98.6 - 130.8 --------- ------------ --------- --------- Current Assets Cash and cash equivalents 2,657.6 39.8 - 2,697.4 Accounts receivable and accrued revenues 168.8 318.7 - 487.5 Deferred tax asset 130.3 - - 130.3 Other current assets 197.5 165.2 - 362.7 --------- ------------ --------- --------- Total Current Assets 3,154.2 523.7 0.0 3,677.9 --------- ------------ --------- --------- Deferred Charges 23.4 154.3 (76.9)(5,6) 100.8 Contractual receivable from LIPA 272.8 - - 272.8 --------- ------------ --------- --------- Total Assets $ 5,392.5 $ 2,617.6 $ 262.2 $ 8,272.3 ======== ============ ========= ========= See accompanying Notes to Unaudited Pro Forma Consolidated Condensed Financial Statements 6a KEYSPAN/LILCO HOLDING CORP. UNAUDITED PRO FORMA CONSOLIDATED CONDENSED BALANCE SHEET December 31, 1997 (In Millions) LILCO Adjustments Adjusted Sale to Pro Forma (Historical) LILCO LIPA (1) Adjustments ---------- --------- --------- --------- ---------- CAPITALIZATION AND LIABILITIES Capitalization Common Shareholders' Equity $ 2,608.5 $ - $ 2,608.5 $ 2,500.8 $ 2,464.6 (3) Long-term debt 4,482.7 - 4,482.7 3,434.1 - Preferred stock 701.0 75.0 (10) 776.0 338.0 - ---------- --------- --------- --------- ---------- Total Capitalization 7,792.2 75.0 7,867.2 6,272.9 2,464.6 ---------- --------- --------- --------- ---------- Regulatory Liabilities 407.0 - 407.0 385.8 - ---------- --------- --------- --------- ---------- Current Liabilities Accounts payable and accrued liabilities 288.6 - 288.6 101.7 13.0 (3) Accrued taxes 54.5 - 54.5 - 399.0 (4) Other current liabilities 336.6 - 336.6 54.0 - ---------- --------- --------- --------- ---------- Total Current Liabilities 679.7 0.0 679.7 155.7 412.0 ---------- --------- --------- --------- ---------- Deferred Credits Deferred federal income tax 2,506.9 - 2,506.9 2,355.9 (280.0)(4) Other 77.4 - 77.4 18.6 - ---------- --------- --------- --------- ---------- Total Deferred Credits 2,584.3 0.0 2,584.3 2,374.5 (280.0) ---------- --------- --------- --------- ---------- Operating Reserves 444.5 - 444.5 (2.1) - ---------- --------- --------- --------- ---------- Commitments and Contingencies - - 0.0 - - Minority Interest in Subsidiary Company - - 0.0 - - ---------- --------- --------- --------- ---------- Total Capitalization and Liabilities $ 11,907.7 $ 75.0 $ 11,982.7 $ 9,186.8 $ 2,596.6 ========== ========= ========= ========= ========== See accompanying Notes to Unaudited Pro Forma Consolidated Condensed Financial Statements 7 KEYSPAN/LILCO HOLDING CORP. UNAUDITED PRO FORMA CONSOLIDATED CONDENSED BALANCE SHEET December 31, 1997 (In Millions) NEWCO before KeySpan Pro Forma NEWCO KeySpan (Historical) Adjustments Pro Forma --------- ------------ --------- --------- CAPITALIZATION AND LIABILITIES Capitalization Common Shareholders' Equity $ 2,572.3 $ 1,014.1 $ 200.4 (6) $ 3,786.8 Long-term debt 1,048.6 760.1 - 1,808.7 Preferred stock 438.0 0.0 - 438.0 --------- ------------ --------- --------- Total Capitalization 4,058.9 1,774.2 200.4 6,033.5 --------- ------------ --------- --------- Regulatory Liabilities 21.2 - - 21.2 --------- ------------ --------- --------- Current Liabilities Accounts payable and accrued liabilities 199.9 177.6 61.8 (6) 439.3 Accrued taxes 453.5 37.9 - 491.4 Other current liabilities 282.6 152.7 - 435.3 --------- ------------ --------- --------- Total Current Liabilities 936.0 368.2 61.8 1,366.0 --------- ------------ --------- --------- Deferred Credits Deferred federal income tax (129.0) 291.9 - 162.9 Other 58.8 94.8 - 153.6 --------- ------------ --------- --------- Total Deferred Credits (70.2) 386.7 0.0 316.5 --------- ------------ --------- --------- Operating Reserves 446.6 - - 446.6 --------- ------------ --------- --------- Commitments and Contingencies 0.0 - - 0.0 Minority Interest in Subsidiary Company 0.0 88.5 - 88.5 --------- ------------ --------- --------- Total Capitalization and Liabilities $ 5,392.5 $ 2,617.6 $ 262.2 $ 8,272.3 ========= ============ ========= ========= See accompanying Notes to Unaudited Pro Forma Consolidated Condensed Financial Statements 7a KEYSPAN/LILCO HOLDING COMPANY UNAUDITED PRO FORMA CONSOLIDATED CONDENSED STATEMENT OF INCOME For the Twelve Months Ended December 31, 1997 (In Millions, Except Per Share Amounts) NEWCO LILCO Sale to Pro Forma before KeySpan Pro Forma NEWCO (Historical) LIPA (1) Adjustments KeySpan (Historical) Adjustments Pro Forma ---------- --------- ---------- ---------- ------------ --------- --------- Revenues Electric $ 2,480.5 $ 2,118.4 $ 11.5 (7) $ 373.6 $ - $ - $ 373.6 Gas - utility sales 667.2 - - 667.2 1,356.9 - 2,024.1 Gas production and other - - - - 126.6 - 126.6 ---------- --------- ---------- ---------- ------------ --------- --------- Total Revenues 3,147.7 2,118.4 11.5 1,040.8 1,483.5 - 2,524.3 ---------- --------- ---------- ---------- ------------ --------- --------- Operating Expenses Operations-fuel & purchased power 965.2 657.4 - 307.8 579.9 - 887.7 Operations-other 390.4 235.0 - 155.4 363.0 - 518.4 Maintenance 113.6 63.2 - 50.4 58.4 - 108.8 Depreciation,depletion and amortization 156.6 94.7 - 61.9 119.8 6.0 (6) 187.7 Base financial component amortization 101.0 101.0 - 0.0 - - 0.0 Rate moderation component amortization 13.5 13.5 - 0.0 - - 0.0 Regulatory liability component amortization (88.5) (88.5) - 0.0 - - 0.0 Other regulatory amortization 56.1 46.5 - 9.6 - - 9.6 Operating taxes 466.7 261.6 - 205.1 154.4 - 359.5 Federal income taxes 224.5 165.0 4.0 (8) 63.5 58.6 - 122.1 ---------- --------- ---------- ---------- ------------ --------- --------- Total Operating Expenses 2,399.1 1,549.4 4.0 853.7 1,334.1 6.0 2,193.8 ---------- --------- ---------- ---------- ------------ --------- --------- Operating Income 748.6 569.0 7.5 187.1 149.4 (6.0) 330.5 Other Income and Deductions (4.3) 15.3 - (19.6) 21.6 - 2.0 ---------- --------- ---------- ---------- ------------ --------- --------- Income Before Interest Charges 744.3 584.3 7.5 167.5 171.0 (6.0) 332.5 Interest Charges 410.3 314.7 - 95.6 44.5 - 140.1 ---------- --------- ---------- ---------- ------------ --------- --------- Net Income 334.0 269.6 7.5 71.9 126.5 (11) (6.0) 192.4 Preferred stock dividend requirements 51.8 23.1 6.0 (10) 34.7 0.2 34.9 ---------- --------- ---------- ---------- ------------ --------- --------- Earnings for Common Stock $ 282.2 $ 246.5 $ 1.5 $ 37.2 $ 126.3 $ (6.0) $ 157.5 ========== ========= ========== ========== ============ ========= ========= Average Common Shares Outstanding 121.2 121.2 121.2 121.2 50.4 (14.5)(12) 157.1 ========== ========= ========== ========== ============ ========= ========= Earnings per Common and Equivalent Shares $ 2.33 $ 2.03 $ 0.01 $ 0.31 $ 2.50 $ (0.04) $ 1.00 (9) ========== ========= ========== ========== ============ ========= ========= See accompanying Notes to Unaudited Pro Forma Consolidated Condensed Financial Statements 8 Notes to Unaudited Pro Forma Consolidated Condensed Financial Statements 1. The historical financial statements of LILCO have been adjusted to give effect to the proposed transaction with LIPA, pursuant to which LILCO will distribute certain of its net assets relating to its gas and generation business ("Transferred Assets") to subsidiaries of the Holding Company. LIPA will then acquire LILCO in a stock sale. The adjustments are based upon a disaggregation of LILCO's balance sheet and operations as estimated by the management of LILCO, and are subject to adjustment pursuant to the terms of the LIPA agreement. In connection with this transaction, the principal assets to be acquired by LIPA through its stock acquisition of LILCO include the electric transmission and distribution system ("The LIPA Transmission and Distribution System"), LILCO's 18% interest in Nine Mile Point 2 nuclear power station, certain of LILCO's regulatory assets associated with its electric business and an allocation of accounts receivable and other assets. The principal liabilities to be assumed by LIPA include LILCO's regulatory liabilities associated with its electric business, a portion of LILCO's long-term debt and an allocation of accounts payable, accrued expenses, customer deposits, other deferred credits and claims. 2. In connection with the LIPA Transaction, LIPA is contractually responsible for reimbursing the Holding Company for postretirement benefits other than pension costs, related to employees of LILCO's electric business. A pro forma adjustment has been reflected to reclassify the associated regulatory asset for postretirement benefits other than pensions to current and non-current accounts receivable pursuant to LIPA's obligation to a subsidiary of the Holding Company. 3. The Cash Purchase Price to be paid by LIPA in connection with its stock acquisition of LILCO will be $2,497.5 million. The Cash Purchase Price was determined based upon the estimated net book value of the LILCO Retained Assets of $2,500.8 million as estimated by LILCO. In addition, the LIPA Transaction obligates the Holding Company upon the closing of the transaction to remit to LIPA $15 million associated with the recovery through litigation of certain real estate taxes previously paid and to pay call premiums totaling $4.9 million on preferred stock series to be redeemed by LIPA. Transaction costs are currently estimated to be $26 million, $13 million of which has been incurred to date, leaving a balance of $13 million as a pro forma adjustment to accrued expenses. Assuming the LIPA Transaction was completed on December 31, 1997, the net cash to be received by the Holding Company would amount to: Cash Purchase Price ........................... $2,497.5 Cash Paid to LIPA ............................. (15.0) Call Premiums ................................. ( 4.9) --------- Net Cash....................................... $2,477.6 ========= 9 4. The transfer of the Transferred Assets from LILCO to the Holding Company (which will then transfer the assets to its subsidiaries)will result in the imposition of federal income taxes on LILCO. Pursuant to the LIPA Agreement, the subsidiaries created by the Holding Company will receive the benefit of the increased tax basis of the Transferred Assets and will receive the Transferred Assets net of the tax imposed on LILCO. The tax is derived from the difference between the fair market value of the Transferred Assets and their existing tax basis. There are many different ways of valuing assets which may result in substantially different values. LILCO has retained professional appraisers to assist it in determining the fair market value of the Transferred Assets. However, the valuation determined by LILCO and its appraisers is not binding on the Internal Revenue Service, which may assert a higher value and a correspondingly greater tax liability. Thus, the actual tax liability and the amount of cash that will be available to LILCO net of such liability cannot be determined at this time. The unaudited pro forma consolidated balance sheet as of December 31, 1997, reflects an estimated tax liability of approximately $399 million based upon an estimate of the value of the Transferred Assets made at the time LILCO entered into the LIPA Agreement. For financial reporting purposes, the subsidiaries reversed the existing deferred tax liability of $280 million relating to the Transferred Assets and recorded a $119 million deferred tax asset, reflecting the estimated income tax effect by which the tax basis of the Transferred Assets exceeded their book basis. 5. The unaudited pro forma condensed consolidated balance sheet as of December 31, 1997 reflects the reclassification of $68.7 million of KeySpan regulatory tax assets from deferred charges to regulatory assets in order to consistently present the regulatory assets of the Holding Company. 6. The purchase price for KeySpan, which amounted to approximately $1.255 billion including $40.6 million of direct transaction costs, has been determined based upon an average of LILCO's opening and closing stock prices for the two trading days before and three trading days after December 29, 1996, the transaction date. The purchase price has been 10 allocated to assets acquired and liabilities assumed based upon their estimated fair values. It is anticipated that the fair value of the utility assets acquired is represented by their book value, which approximates the value of these assets recognized by the New York State Public Service Commission (PSC) in establishing rates which are designed to, among other things, provide for a return on the book value of these assets and the recovery of costs included as depreciation and amortization charges. The estimated fair values of KeySpan's non-utility assets approximate their carrying values. At December 29, 1996, the transaction date, the purchase price exceeded the fair value of the net assets acquired by $241.0 million, which will be amortized to income over 40 years. The actual amount of goodwill to be recorded will be based on the net assets acquired as of the closing date. An additional $29.4 million in direct transaction costs will be recovered through rates of the Holding Company's regulated subsidiaries. As a result, these costs have been recorded as a regulatory asset in the consolidated pro forma. 7. The agreement with LIPA includes a provision for the Holding Company to earn in the aggregate approximately $11.5 million in annual management service fees from LIPA for the management of the LIPA Transmission and Distribution System and the management of all aspects of fuel and power supply. These agreements also contain certain incentive and penalty provisions which could materially impact earnings from such agreements. 8. The net pro forma charge of $4.0 million represents the income tax effect associated with the recording of the pro forma adjustments for the $11.5 million management fee (see Note 7). 9. No adjustments have been made to earnings on common stock to reflect earnings on net available proceeds of approximately $1.7 billion to be received, after remittances to the Holding Company's gas and generation subsidiaries for working capital purposes (see Note 3). If these funds were invested at 5.92% (the 30 year US Treasury Bond yield based on recent prices), the Holding Company would have realized additional interest income, net of taxes, of approximately $65.3 million, or approximately $.42 per share, on a pro forma consolidated basis. Each one percent change in the assumed interest rate, would increase/decrease interest income, net of taxes, by $11.0 million. LILCO's allowed rate of return on its common equity for its electric business is currently 11%. 11 10. LILCO will transfer the Transferred Assets to subsidiaries of the Holding Company in exchange for shares of the Holding Company Common Stock and up to $75 million face amount of Holding Company Preferred Stock. The privately placed Preferred Stock will be non-voting, non-convertible and have a five-year term. For purposes of these pro forma financial statements, it is assumed that the Holding Company will issue $75 million of Preferred Stock, LILCO will sell the preferred stock for $75 million in proceeds and will retain the proceeds (i.e. a Retained Asset). With a $75 million increase in the Retained Assets, the LIPA Agreement provides that the Retained Debt will increase by a corresponding amount. The LIPA Agreement also provides that if the Holding Company were to issue an amount other than $75 million of Preferred Stock, the incremental difference between the amount actually issued and $75 million, will result in a corresponding increase or decrease in the amount of accounts payable retained by LILCO. These pro forma financial statements reflect a reduction in interest expense for the reduced level of subsidiary debt, and an increase in preferred stock dividend requirements. Finally, for purposes of these pro forma financial statements, it is assumed that the dividend rate on this privately placed Preferred Stock will be 7.95%, which is equal to the Company's highest cost preferred stock. 11. Earnings of KeySpan for the twelve month period ended December 31, 1997 included gains of $15.2 million, or 30 cents per share, from sales of various cogeneration investments as well as the sale of residual interests in Canadian assets. 12. The unaudited pro forma consolidated condensed financial statements reflect the exchange of each share of LILCO Common Stock outstanding into 0.880 shares of Holding Company Common Stock and each share of KeySpan Common Stock outstanding into one share of Holding Company Common Stock, as provided in the KeySpan/LILCO Agreement. 12