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EXHIBIT 77(O) MORGAN STANLEY DEAN WITTER DEVELOPING GROWTH SECURITIES TRUST
10f-3 transactions for the period April 1, 2000 - September 30, 2000
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TOTAL
ISSUED/
DATE PRICE SHARES % of PRINCIPAL PURCHASED
SECURITY PURCHASED SHARE PURCHASED Assets AMOUNT BY FUND BROKER(S)
Active Power Inc. 08/07/00 $ 17.00 14,100 0.020% $ 136,000,000.00 0.176% Goldman Sachs
Arena Pharmaceuticals 07/28/00 $ 18.00 65,600 0.101% $ 108,000,000.00 1.093% Ing Baring
Avici Systems 07/27/00 $ 31.00 4,900 0.013% $ 217,000,000.00 0.070% Dain Rauscher
California Pizza Kitchen 08/02/00 $ 15.00 68,500 0.090% $ 79,500,000.00 1.292% Banc of America
Capstone Turbine Corp. 06/28/00 $ 16.00 19,800 0.026% $ 145,454,544.00 0.218% Goldman Sachs
Charles River Laboratories 06/23/00 $ 16.00 213,100 0.289% $ 224,000,000.00 1.522% DLJ
Coherent Inc. 07/26/00 $ 65.00 63,000 0.337% $ 97,500,000.00 4.200% Warburg Dillon
Decode Genetics 07/18/00 $ 18.00 13,000 0.018% $ 172,800,000.00 0.135% Lehman Brothers
Giganet Inc. 08/04/00 $ 17.00 5,300 0.008% $ 5,000,000.00 1.802% Robertson Stephens
Lantroix Inc. 08/04/00 $ 10.00 450,000 0.390% $ 60,000,000.00 7.500% DLJ
Mainspring Inc. 07/02/00 $ 12.00 4,900 0.001% $ 48,000,000.00 0.123% Legg Mason
Neopharm Inc. 09/25/00 $ 35.50 100,000 0.303% $ 113,600,000.00 3.125% SG Cowen
Proton Energy Inc. 09/26/00 $ 17.00 27,500 0.039% $ 119,000,000.00 0.393% King (C.L.) & Associates
Sina.com 04/12/00 $ 17.00 46,100 0.067% $ 68,000,000.00 1.153% Raymond James
Southern Energy Inc. 09/26/00 $ 22.00 81,900 0.120% $ 1,276,000,000.00 1.170% William Capital Growth
Speechworks International 07/31/00 $ 20.00 9,000 0.016% $ 95,000,000.00 0.189% Chase H&Q
Skywwest Inc. 08/25/00 $ 44.50 72,000 0.270% $ 117,306,450.00 2.731% Raymond James
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