PIMCO Corporate Opportunity Fund Reports Results for the Fiscal Quarter Ended February 28, 2007


NEW YORK, May 10, 2007 (PRIME NEWSWIRE) -- PIMCO Corporate Opportunity Fund (the "Fund") (NYSE:PTY), a closed-end management investment company, which seeks maximum total return through a combination of current income and capital appreciation, today announced its results for the fiscal quarter ended February 28, 2007.



                          At February 28, 2007    At February 28, 2006
                          --------------------    --------------------
 Net Assets (a)                 $1,578,464,313          $1,591,011,456
 Common Shares Outstanding          65,696,762              65,146,263
 Net Asset Value ("NAV")                $15.43                  $15.75
 Market Price                           $16.71                  $17.41
 Premium to NAV                          8.30%                  10.54%



                               Quarter ended           Quarter ended
                             February 28, 2007       February 28, 2006
                             -----------------       -----------------
 Net Investment Income (b)         $25,253,905             $25,317,842
 Per Share (b)                           $0.38                   $0.39
 Net Realized and Change
  in Unrealized Gain (b)            $7,483,063             $21,638,763
 Per Common Share (b)                    $0.11                   $0.33
 3 Month Average Undistributed
  (Overdistributed) Net
  Investment Income Per
  Common Share (c)                    $(0.0219)                $0.0049

 (a) Net assets are inclusive of market value of Preferred Shares of
     $565 million.

 (b) The information provided is in accordance with generally accepted
     accounting principles (""GAAP""), which requires the Fund to
     treat amounts received (paid) by the Fund under swap agreements
     as net realized gain (loss). However, these amounts are treated
     as net income (loss) for federal income tax purposes. By using
     GAAP, Net Investment Income for the fiscal quarter ended
     February 28, 2007 was $1,877,339 ($0.03 per common share) lower
     (and Net Realized and Change in Unrealized Gain correspondingly
     higher) than those figures would have been if swap amounts were
     treated as net income (loss) in accordance with federal income
     tax treatment. By using GAAP, Net Investment Income for the
     fiscal quarter ended February 28, 2006 was $4,545,324 ($0.07 per
     common share) lower (and Net Realized and Change in Unrealized
     Gain correspondingly higher) than those figures would be if swap
     amounts were treated as net income (loss) in accordance with
     federal income tax treatment.

 (c) Calculated using the estimated accumulated month-end tax-basis
     balances for the three months ended February 28, 2007 and
     February 28, 2006, respectively. Please note that generally there
     is a close correlation between what the Fund earns (net of
     expenses) and what it pays in monthly dividends. However, since
     net earning rates fluctuate from month to month while monthly
     dividends have remained relatively stable, there will be periods
     when the Fund may modestly over-earn or under-earn its monthly
     dividend, which would have the effect of adding to or subtracting
     from the Fund's undistributed (overdistributed) net investment
     income balance. Fund management analyzes the Fund's current and
     projected net earning rates prior to recommending dividend
     amounts to the Fund's Board of Trustees for declaration. There
     can be no assurance that the current dividend rate or the
     undistributed (overdistributed) net investment income balance
     will remain constant. Inclusive of amounts received under swap
     agreements, in accordance with federal income tax treatment.

Allianz Global Investors Fund Management LLC, an indirect, wholly-owned subsidiary of Allianz Global Investors of America L.P., serves as the Fund's investment manager and is a member of Munich-based Allianz Group (NYSE:AZ). Pacific Investment Management Company LLC, an Allianz Global Investors Fund Management affiliate, serves as the investment advisor.

The Fund's daily New York Stock Exchange closing price, net asset value per share, as well as other information, is available at http://www.allianzinvestors.com/closedendfunds or by calling the Fund's shareholder servicing agent at (800) 331-1710.

The financial information contained herein is solely based upon the data available at the time of publication of this press release, and there is no assurance that future results will be the same or similar to what is reported herein. Information that was obtained from third party sources we believe to be reliable is not guaranteed as to its accuracy or completeness. This press release contains no recommendations to buy or sell any specific securities and should not be considered investment advice of any kind. Past performance is no guarantee of future results and the investment returns generated by the Fund will fluctuate. In making any investment decision, individuals should utilize other information sources and the advice of their own professional adviser.



            

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