| Wednesday October 8 5:10 PM EDT 
 Company Press Release
 
 Vicor Corp. Announces Earnings
 
 ANDOVER, Mass.--(BUSINESS WIRE)--Oct. 8, 1997--Vicor Corp. (NASDAQ:VICR)
 (NMS:VICR) today announced its financial results for the quarter ended Sept. 30, 1997.
 Revenues for the quarter increased 16 percent to $41,400,000 compared with $35,673,000 for
 the corresponding period a year ago. Net income and earnings per share for the quarter were
 $7,130,000 vs. $6,235,000 in 1996 and $.16 vs. $.15 in 1996, respectively.
 
 For the nine months ended Sept. 30, 1997 revenues increased 10 percent to $119,057,000 vs.
 $108,181,000 for the same period of 1996. Net income and earnings per share were
 $19,469,000 vs. $19,613,000 in 1996 and $.45 vs. $.46 in 1996, respectively.
 
 Vicor Corp. designs, manufactures and markets modular power components and complete
 power systems. Headquartered in Andover, Mass., Vicor sells its products primarily to the
 telecommunications, electronic data processing, industrial control and military electronics
 markets.
 
 VICOR CORPORATION
 CONSOLIDATED STATEMENT OF OPERATIONS
 (Thousands except for per share amounts)
 
 Quarter Ended          Nine Months Ended
 (Unaudited)               (Unaudited)
 Sept 30,   Sept 30,      Sept 30,   Sept 30,
 1997       1996          1997       1996
 
 Net Revenues            $ 41,400   $ 35,673     $ 119,057  $ 108,181
 
 Costs and expenses
 Cost of sales            19,967     16,353        57,146     49,755
 Sales & administration    7,398      6,800        22,328     19,807
 Research & development    4,227      3,753        12,827     10,501
 -------    -------      --------   -------
 31,592     26,906        92,301     80,063
 
 Operating income           9,808      8,767        26,756     28,118
 
 Interest and other, net    1,332        974         3,664      2,857
 
 Income before taxes       11,140      9,741        30,420     30,975
 
 Income taxes              (4,010)    (3,506)      (10,951)   (11,362)
 
 Net income              $  7,130   $  6,235      $ 19,469   $ 19,613
 
 Shares outstanding        43,438     42,785        42,877     42,451
 
 Earnings per share      $   0.16   $   0.15        $ 0.45     $ 0.46
 
 -0-
 
 Vicor Corporation
 Consolidated Balance Sheet
 (Thousands)
 
 Sept. 30          Dec. 31
 1997              1996
 (Unaudited)       (Unaudited)
 
 Assets
 
 Current Assets
 Cash                              $ 86,327           $ 73,647
 Accounts receivable                 31,181             25,001
 Inventories                         20,399             21,129
 Other current assets                 2,949              2,765
 ---------          --------
 Total current assets          140,856            122,542
 
 Property and equipment, net         63,959             57,613
 Notes receivable                     9,056              3,795
 Other assets                         2,927              2,493
 ---------          --------
 $ 216,798          $ 186,443
 
 Liabilities and Stockholders' Equity
 
 Current Liabilities
 Accounts payable                 $   7,300         $   5,558
 Accrued compensation
 and benefits                      2,588             2,129
 Other accrued liabilities            7,830             6,304
 ---------          --------
 Total current liabilities      17,718            13,991
 
 Deferred income taxes - long term    1,708             1,708
 
 Stockholders' Equity
 Capital stock                       93,455            86,296
 Retained earnings                  144,308           124,839
 Treasury stock                     (40,391)          (40,391)
 ---------         ---------
 Total stockholders' equity    197,372           170,744
 ---------         ---------
 $ 216,798         $ 186,443
 
 Contact:
 
 Vicor Corp.
 Mark A. Glazer, 508/470-2900
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