| November 20, 2008 | Standard & Poor's and Centre for Economic and Financial Research at New Economic School include OGK-1 in the list of largest Russian enterprises upon completion of informational transparency research.
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| November 14, 2008 | MICEX transfers OGK-1 shares from Quotations List I to Quotations List A, 1st Level, giving access to company security to a larger group of professional investors.
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| August 12, 2008 | NVGRES HOLDING LIMITED (NHL), a subsidiary of OGK-1 owning 100% of ZAO Nizhnevartovskaya GRES issues 3,335 additional shares to TNK-BP. As the result, TNK-BP owns 25% plus 1 shares in the increased authorized capital of NHL. OGK-1 owns 75 % minus 1 shares of NHL.
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| August 1, 2008 | ZAO Nizhnevartovsk GRES receives two existing power generating units of Nizhnevartovsk TPS as a contribution to its authorized capital and becomes an independent player on the wholesale electricity market.
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| July 10, 2008 | At the last stage of RAO UES of Russia reform, OGK-1 launches a GDR program using The Bank of New York Mellon as a depository bank to protect the rights of RAO UES of Russia GDR holders.
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| July 1, 2008 | OGK-1 completes reorganization by merger with the OGK-1 Holding which was divested from RAO UES of Russia.
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| May 30, 2008 | OGK-1 receives regulator approval for international listing of 13,428,638,583 shares of OGK-1 in order to launch a GDR (Global Depository Receipt) program.
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| April 18, 2008 | OGK-1 Board of Directors decides to repurchase OGK-1 shares to convert shares of OGK-1 Holding into shares of OGK-1. According to repurchase report, OGK-1 acquired 126,490,745 shares.
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