Exhibit 99.1 ADTRAN, Inc. Reports First Quarter 2006 Results and Declares Quarterly Cash Dividend HUNTSVILLE, Ala.--(BUSINESS WIRE)--April 17, 2006--ADTRAN, Inc. (NASDAQ:ADTN) reported results for the first quarter of 2006. Sales increased to $108,648,000 for the quarter compared to $104,577,000 for the first quarter of 2005. Non-GAAP net income increased 18% to $17,966,000 for the quarter compared to GAAP net income of $15,220,000 for the first quarter of 2005. Non-GAAP earnings per share, assuming dilution, were $0.23 for the quarter compared to GAAP earnings per share, assuming dilution, of $0.20 for the first quarter of 2005. For the quarter, GAAP net income increased to $16,255,000 and GAAP earnings per share, assuming dilution, increased to $0.21, compared to the first quarter of 2005. Non-GAAP net income and non-GAAP earnings per share for the first quarter exclude the effect of stock compensation expense resulting from the application of Statement of Financial Accounting Standards No. 123R, Share-Based Payment ("SFAS 123R"). SFAS 123R was adopted on a prospective basis effective January 1, 2006. See the table below for reconciliation between non-GAAP and GAAP net income and earnings per share. For the quarter, gross margin increased to 59.4% compared to 57.6% for the first quarter of 2005. ADTRAN Chief Executive Officer Tom Stanton stated, "Although shipments in the first quarter of 2006 were below our original expectations, we saw strong revenue growth in our three primary growth areas: Optical Access, Broadband Access, and NetVanta(R) Routers and Switches. We anticipate this momentum will continue to increase as we progress through the year." The Company also announced that its Board of Directors declared a cash dividend for the first quarter of 2006. The quarterly cash dividend is $0.09 per common share to be paid to holders of record at the close of business on May 4, 2006. The ex-dividend date is May 2, 2006 and the payment date is May 18, 2006. The Company also confirmed that its first quarter conference call will be held Tuesday, April 18 at 9:30 a.m. Central Time. Guidance for the second quarter and year 2006 will be issued during this conference call. This conference call will be web cast live through StreetEvents.com. To listen, simply visit the Investor Relations site at http://www.adtran.com or http://streetevents.com approximately 10 minutes prior to the start of the call and click on the conference call link provided. An online replay of the conference call will be available for seven days at http://streetevents.com. In addition, an online replay of the conference call, as well as the text of the Company's earnings release, will be available on the Investor Relations site at http://www.adtran.com for at least 12 months following the call. ADTRAN, Inc. is one of the world's most successful network access equipment suppliers, with an 18-year history of profitability and a portfolio of more than 1,400 solutions for use in the last mile of today's telecommunications networks. Widely deployed by carriers and enterprises alike, ADTRAN solutions enable voice, data, video, and Internet communications across copper, fiber, and wireless network infrastructures. ADTRAN solutions are currently in use by every major U.S. service provider and many global ones, as well as by thousands of public, private and governmental organizations worldwide. For more information, contact the company at 800 9ADTRAN (800 923-8726) or via e-mail at info@adtran.com. On the Web, visit www.adtran.com. This press release contains forward-looking statements which reflect management's best judgment based on factors currently known. However, these statements involve risks and uncertainties, including the successful development and market acceptance of new products, the degree of competition in the market for such products, the product and channel mix, component costs, manufacturing efficiencies, and other risks detailed in our annual report on Form 10-K for the year ended December 31, 2005. These risks and uncertainties could cause actual results to differ materially from those in the forward-looking statements included in this press release. This release includes non-GAAP net income, non-GAAP earnings per share data, and other non-GAAP line items from the Non-GAAP Information table in this release, including costs of sales, gross profit, selling, general and administrative expenses, research and development expenses, profit from operations, income before provision for income taxes and provision for income taxes. These measures exclude the effect of stock compensation expense for employee stock options associated with the application of SFAS 123R, which ADTRAN adopted effective January 1, 2006. These measures are not in accordance with, or an alternative for, generally accepted accounting principles and may be different from non-GAAP measures used by other companies. ADTRAN believes that the presentation of the non-GAAP measures, when shown in conjunction with the corresponding GAAP measures, provides useful information to management and investors regarding financial and business trends relating to its financial condition and results of operations. ADTRAN further believes that where adjustments used in calculating non-GAAP net income and non-GAAP earnings per share are based on specific, identified charges that impact different line items in the statements of income, it is useful to investors to know how these specific line items are affected by these adjustments. In particular, as ADTRAN begins to apply SFAS 123R, it believes that it is useful to investors to understand how the expenses associated with the application of SFAS 123R are reflected in its results of operations. The presentation of these non-GAAP measures permits both investors and management to more readily compare past results, which do not include the impact of SFAS 123R, with future results, and to better understand ADTRAN's performance over the periods presented. Condensed Balance Sheet March 31, 2006 Unaudited (In thousands) March 31, 2006 ----------- Assets Cash & cash equivalents $ 110,160 Short-term investments 160,031 Accounts receivable (net) 62,555 Other receivables 3,066 Inventory (net) 48,160 Prepaid expenses and other current assets 8,654 ----------- Total current assets 392,626 Equipment (net) 19,682 Land 4,263 Bldg. & land improvements (net) 59,771 Other assets 498 Long-term investments 185,132 ----------- Total long-term assets 269,346 ----------- Total assets $ 661,972 =========== Liabilities and stockholders' equity Accounts payable $ 19,334 Accrued wages and benefits 6,982 Accrued liabilities 20,798 ----------- Total current liabilities 47,114 Deferred tax liabilities 3,615 Other non-current liabilities 4,671 Long term-debt 50,000 ----------- Total long-term liabilities 58,286 Total liabilities 105,400 Stockholders' equity 556,572 ----------- ----------- Total liabilities and stockholders' equity $ 661,972 =========== Condensed Statements of Income For the three month periods ended March 31, 2006 and 2005 (In thousands, except per share data) Unaudited Three Months Three Months Ended Ended March 31, 2006 March 31, 2005 -------------- -------------- Sales $108,648 $104,577 Cost of Sales 44,140 44,349 -------------- -------------- Gross Profit 64,508 60,228 Selling, general and administrative expenses 24,766 22,949 Research and development expenses 17,766 16,343 -------------- -------------- Profit from operations 21,976 20,936 Interest expense (634) (583) Other income, net 4,116 2,848 -------------- -------------- Income before provision for income taxes 25,458 23,201 Provision for income taxes (9,203) (7,981) -------------- -------------- Net income (1) $16,255 $15,220 ============== ============== Weighted average shares Basic 76,655 75,755 Diluted (2) 78,909 77,318 Earnings per common share Basic $0.21 $0.20 Diluted (2) $0.21 $0.20 (1) Net income for the first quarter of fiscal 2006 included stock- based compensation expense recognized related to employee stock options, net of tax, of $1.7 million under SFAS 123(R). There was no stock-based compensation expense related to employee stock options under SFAS 123 in fiscal 2005 because we did not adopt the recognition provisions of SFAS 123. (2) Assumes exercise of dilutive stock options calculated under the treasury stock method. Non-GAAP Information (1) (2) For the three month periods ended March 31, 2006 and 2005 (In thousands, except per share data) Unaudited Non-GAAP (excludes effects of SFAS 123R) GAAP GAAP Three Three Three Months Effects of Months Months Ended SFAS 123R Ended Ended March 31, March 31, March 31, March 31, 2006 2006 2006 2005 --------- --------- --------- --------- Sales $108,648 $0 $108,648 $104,577 Cost of Sales (a) 44,057 83 44,140 44,349 --------- --------- --------- --------- Gross Profit (a) 64,591 83 64,508 60,228 Selling, general and administrative expenses (a) 23,809 957 24,766 22,949 Research and development expenses (a) 16,839 927 17,766 16,343 --------- --------- --------- --------- Profit from operations (a) 23,943 (1,967) 21,976 20,936 Interest expense (634) 0 (634) (583) Other income, net 4,116 0 4,116 2,848 --------- --------- --------- --------- Income before provision for income taxes (a) 27,425 (1,967) 25,458 23,201 Provision for income taxes (b) (9,459) 256 (9,203) (7,981) --------- --------- --------- --------- Net income (a)(b) $17,966 ($1,711) $16,255 $15,220 ========= ========= ========= ========= Weighted average shares Basic 76,655 76,655 76,655 75,755 Diluted (3) 78,909 78,909 78,909 77,318 Earnings per common share Basic $0.23 ($0.02) $0.21 $0.20 Diluted (3) $0.23 ($0.02) $0.21 $0.20 (1) A reconciliation between net income on a GAAP basis and non-GAAP net income including items (a) through (b) is provided in the table below. (2) There was no stock-based compensation expense recorded in fiscal 2005, as we had adopted the footnote disclosure only provision of SFAS 123. (3) Assumes exercise of dilutive stock options calculated under the treasury stock method. RECONCILIATION OF GAAP TO NON-GAAP NET INCOME AND EARNINGS PER SHARE (In thousands) Quarter Ended Quarter Ended March 31, 2006 March 31, 2005 GAAP Net Income $16,255 $15,220 (a) Stock-based compensation expense related to employee stock options (1) 1,967 0 (b) Income tax effect of stock-based compensation expense (256) 0 -------------- --------------- Non-GAAP Net Income $17,966 $15,220 ============== =============== GAAP Earnings per common share - diluted $0.21 $0.20 Per share effect of stock-based compensation expense $0.02 N/A -------------- --------------- Non-GAAP Earnings per common share - diluted $0.23 $0.20 ============== =============== (1) For the first quarter of 2006, stock-based compensation expense was allocated as follows: $83 to cost of sales expense, $957 to selling, general and administrative expense, and $927 to research and development expense. COMPARISON OF NET INCOME INCLUDING THE EFFECT OF STOCK-BASED COMPENSATION EXPENSE RELATED TO EMPLOYEE STOCK OPTIONS UNDER SFAS 123(R) and SFAS 123 (1) (In thousands) Quarter Ended Quarter Ended March 31, 2006 March 31, 2005 Net Income - as reported for the prior period N/A $15,220 Stock-based compensation expense related to employee stock options $1,967 2,598 Tax benefit (256) (367) -------------- -------------- Stock-based compensation expense related to employee stock options, net of tax $1,711 2,231 ============== -------------- Net income, including the effect of stock-based compensation expense $16,255 $12,989 ============== ============== Diluted net income per share - as reported for the prior period N/A $0.20 Diluted net income per share, including the effect of stock-based compensation expense $0.21 $0.17 (1)Stock-based compensation expense prior to January 1, 2006 is based on the pro forma application of SFAS 123. Net income and net income per share prior to January 1, 2006 did not include stock-based compensation for employee stock options because ADTRAN did not adopt the recognition provisions of SFAS 123. CONTACT: ADTRAN, Inc. Jim Matthews, 256-963-8775 or Investor Services/Assistance: Gayle Ellis, 256-963-8220