<ARTICLE> 5 <LEGEND> This schedule contains summary financial information extracted from the condensed statement of income for the three months ended March 31, 2000 and the condensed balance sheet as of March 31, 2000 and is qualified in its entirety by reference to such financial statements. </LEGEND> <CIK> 0000926282 <NAME> ADTRAN, INC. <MULTIPLIER> 1 <CURRENCY> U.S.DOLLAR <PERIOD-TYPE> 3-MOS <FISCAL-YEAR-END> DEC-31-2000 <PERIOD-START> JAN-31-2000 <PERIOD-END> MAR-31-2000 <EXCHANGE-RATE> 1 <CASH> 25,749,433 <SECURITIES> 68,756,490 <RECEIVABLES> 62,971,979 <ALLOWANCES> 986,771 <INVENTORY> 59,692,478 <CURRENT-ASSETS> 229,056,997 <PP&E> 154,262,624 <DEPRECIATION> 43,370,061 <TOTAL-ASSETS> 583,828,137 <CURRENT-LIABILITIES> 31,500,649 <BONDS> 50,000,000 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 394,466 <OTHER-SE> 421,667,867 <TOTAL-LIABILITY-AND-EQUITY> 583,828,137 <SALES> 99,470,351 <TOTAL-REVENUES> 99,470,351 <CGS> 45,065,863 <TOTAL-COSTS> 45,065,863 <OTHER-EXPENSES> 29,934,667 <LOSS-PROVISION> 0 <INTEREST-EXPENSE> 576,333 <INCOME-PRETAX> 25,446,540 <INCOME-TAX> 8,652,065 <INCOME-CONTINUING> 16,794,475 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 16,795,190 <EPS-BASIC> .44 <EPS-DILUTED> .42