| Code | Name | High | Low | Close | Volume | Change | |
|---|
| OABC | OMNIAMERICAN BANCORP INC. | 11.85 | 11.80 | 11.84 | 17,300 | 0.01 |  | 0.08 | 4 |
| OBAF | OBA FINANCIAL SERVICES INC. | 10.45 | 10.45 | 10.45 | 13,000 | 0.01 | | 0.10 | 4 |
| OBAS | Optibase Ltd. | 1.450 | 1.350 | 1.370 | 15,600 | 0.010 | | 0.72 | 5 |
| OBCI | Ocean Bio-Chem Inc. | 1.370 | 1.330 | 1.340 | 1,100 | 0.120 | | 8.22 | 6 |
| OCCF | Optical Cable Corporation | 3.220 | 3.060 | 3.060 | 23,300 | 0.100 | | 3.16 | 7 |
| OCFC | OceanFirst Financial Corp. | 11.51 | 11.30 | 11.36 | 22,600 | 0.15 | | 1.30 | 4 |
| OCLR | Ocular Sciences, Inc. | 2.520 | 2.380 | 2.430 | 1,175,900 | 0.010 |  | 0.41 | 8 |
| OCLS | Oculus Innovative Sciences Inc. | 2.270 | 2.180 | 2.230 | 331,900 | 0.050 | | 2.19 | 7 |
| OCNF | OceanFreight Inc. | 0.7900 | 0.7500 | 0.7800 | 2,252,200 | 0.0300 | | 4.00 | 4 |
| OCNW | Occam Networks Inc. | 7.170 | 6.900 | 7.110 | 65,500 | 0.100 | | 1.43 | 5 |
| ODFL | Old Dominion Freight Line Inc. | 34.00 | 33.26 | 33.66 | 427,200 | 0.34 | | 1.00 | 4 |
| ODSY | Odyssey Healthcare Inc. | 18.54 | 18.00 | 18.50 | 299,200 | 0.30 | | 1.65 | 7 |
| OESX | Orion Energy Systems Inc. | 6.000 | 5.460 | 5.800 | 424,100 | 0.340 | | 6.23 | 7 |
| OFIX | Orthofix International N.V. | 35.70 | 35.22 | 35.63 | 38,200 | 0.16 | | 0.45 | 5 |
| OFLX | Omega Flex Inc. | 10.87 | 10.78 | 10.85 | 3,000 | 0.02 | | 0.18 | 4 |
| OGXI | Oncogenex Technologies Inc. | 21.82 | 20.64 | 20.73 | 92,100 | 0.94 | | 4.34 | 3 |
| OICO | O. I. Corporation | 9.010 | 8.110 | 8.920 | 2,300 | 0.580 | | 6.95 | 5 |
| OIIM | O2Micro International | 6.900 | 6.740 | 6.790 | 132,800 | 0.060 | | 0.88 | 7 |
| OKSB | Southwest Bancorp Inc. | 9.000 | 8.610 | 8.940 | 44,500 | 0.160 | | 1.82 | 6 |
| OKSBP | Southwest Bancorp Inc. | 25.32 | 25.00 | 25.10 | 12,200 | 0.00 |  | 0.00 | 6 |
| OLBK | Old Line Bancshares Inc. | 7.440 | 7.210 | 7.290 | 1,300 | 0.100 | | 1.39 | 6 |
| OLCB | Ohio Legacy Corporation | 2.130 | 1.970 | 2.130 | 31,600 | 0.080 | | 3.90 | 6 |
| OMAB | Grupo Aeroportuario del Centro Norte | 14.85 | 14.55 | 14.61 | 27,700 | 0.06 | | 0.41 | 4 |
| OMCL | Omnicell Inc. | 15.06 | 14.86 | 14.88 | 232,400 | 0.11 | | 0.73 | 8 |
| OMER | OMEROS CORPORATION | 6.440 | 6.240 | 6.360 | 11,600 | 0.150 | | 2.42 | 4 |
| OMEX | Odyssey Marine Exploration Inc. | 1.500 | 1.460 | 1.490 | 120,400 | 0.000 | | 0.00 | 6 |
| OMNI | OMNI Energy Services Corp. | 1.950 | 1.870 | 1.930 | 70,700 | 0.000 | | 0.00 | 6 |
| OMPI | Obagi Medical Products Inc. | 12.39 | 11.89 | 12.28 | 116,600 | 0.37 | | 3.11 | 6 |
| ONAV | Omega Navigation Enterprises Inc. | 3.030 | 2.920 | 2.970 | 36,200 | 0.010 | | 0.34 | 4 |
| ONCY | Oncolytics Biotech Inc. | 3.460 | 3.380 | 3.450 | 128,000 | 0.080 | | 2.37 | 5 |
| ONEQ | Fidelity Nasdaq Composite Index Tracking | 94.83 | 94.24 | 94.45 | 5,400 | 0.06 | | 0.06 | 6 |
| ONFC | Oneida Financial Corp. | 9.460 | 8.900 | 9.410 | 2,200 | 0.170 | | 1.84 | 6 |
| ONNN | ON Semiconductor Corporation | 8.090 | 7.870 | 7.960 | 5,146,600 | 0.100 | | 1.24 | 5 |
| ONSM | Onstream Media Corporation | 0.3200 | 0.2800 | 0.3000 | 205,700 | 0.0200 | | 6.25 | 6 |
| ONTY | Oncothyreon Inc . | 4.870 | 4.770 | 4.790 | 78,100 | 0.020 | | 0.42 | 5 |
| ONVI | Onvia Inc. | 8.010 | 7.850 | 7.940 | 1,800 | 0.070 | | 0.87 | 6 |
| ONXX | ONYX Pharmaceuticals Inc. | 32.25 | 31.78 | 32.15 | 510,600 | 0.15 | | 0.47 | 7 |
| OPEN | Open Solutions, Inc. | 37.21 | 36.62 | 37.01 | 68,300 | 0.06 | | 0.16 | 5 |
| OPHC | OptimumBank Holdings Inc. | 1.100 | 1.000 | 1.080 | 10,900 | 0.080 | | 6.90 | 5 |
| OPLK | Oplink Communications Inc. | 17.47 | 16.69 | 17.32 | 130,400 | 0.49 | | 2.91 | 5 |
| OPMR | Optimal Group Inc. | 2.400 | 2.340 | 2.360 | 88,900 | 0.020 | | 0.85 | 6 |
| OPNT | OPNET Technologies Inc. | 15.93 | 15.33 | 15.90 | 340,300 | 0.40 | | 2.58 | 7 |
| OPOF | Old Point Financial Corporation | 14.60 | 14.50 | 14.59 | 1,500 | 0.00 | | 0.00 | 5 |
| OPTC | Optelecom-NKF Inc. | 2.640 | 2.560 | 2.560 | 300 | 0.150 | | 5.54 | 5 |
| OPTR | Optimer Pharmaceuticals Inc. | 13.47 | 13.26 | 13.42 | 115,200 | 0.04 | | 0.30 | 6 |
| OPTT | Ocean Power Technologies Inc. | 6.920 | 6.650 | 6.840 | 41,300 | 0.070 | | 1.03 | 4 |
| OPTV | OpenTV Corp. | 1.540 | 1.540 | 1.540 | 53,600 | 0.000 | | 0.00 | 7 |
| OPWV | Openwave Systems Inc | 2.590 | 2.470 | 2.490 | 406,800 | 0.070 | | 2.73 | 6 |
| OPXA | Opexa Therapeutics Inc. | 1.990 | 1.920 | 1.950 | 43,100 | 0.030 | | 1.52 | 6 |
| OPXAW | Opexa Therapeutics Inc. | 0.9600 | 0.9500 | 0.9500 | 1,000 | 0.1200 | | 11.21 | 5 |
| OPXT | Opnext Inc. | 2.760 | 2.520 | 2.590 | 486,100 | 0.000 | | 0.00 | 7 |
| ORBC | ORBCOMM Inc. | 2.400 | 2.250 | 2.400 | 591,900 | 0.030 | | 1.27 | 4 |
| ORBK | Orbotech Ltd. | 9.830 | 9.700 | 9.810 | 18,100 | 0.120 | | 1.24 | 5 |
| ORBT | Orbit International Corporation | 3.690 | 3.620 | 3.620 | 17,000 | 0.010 | | 0.28 | 5 |
| ORCC | Online Resources Corporation | 4.250 | 4.000 | 4.210 | 329,800 | 0.150 | | 3.69 | 6 |
| ORCD | Orchard Enterprises Inc (The) | 2.020 | 1.990 | 1.990 | 5,600 | 0.000 | | 0.00 | 7 |
| ORCH | Orchid Cellmark Inc. | 1.740 | 1.640 | 1.700 | 17,200 | 0.030 | | 1.73 | 6 |
| ORCL | Oracle Corporation | 25.60 | 25.27 | 25.38 | 29,185,800 | 0.09 | | 0.35 | 6 |
| ORCT | Orckit Communications | 5.610 | 4.980 | 5.110 | 158,000 | 0.560 | | 9.88 | 7 |
| OREX | Orexigen Therapeutics Inc. | 6.310 | 6.030 | 6.060 | 856,000 | 0.180 | | 2.88 | 5 |
| ORIT | Oritani Financial Corp. | 16.40 | 16.19 | 16.29 | 31,400 | 0.02 | | 0.12 | 6 |
| ORLY | O'Reilly Automotive Inc. | 42.21 | 41.65 | 41.91 | 1,707,700 | 0.02 | | 0.05 | 6 |
| ORNG | Orange 21 Inc. | 0.9900 | 0.6500 | 0.9000 | 2,900 | 0.0800 | | 8.16 | 5 |
| ORRF | ORRSTOWN FINL SVCS INC | 33.81 | 32.15 | 32.17 | 4,000 | 0.52 | | 1.59 | 5 |
| ORXE | Ore Pharmaceuticals Inc | 0.6300 | 0.6000 | 0.6300 | 4,400 | 0.0000 | | 0.00 | 5 |
| OSBC | Old Second Bancorp Inc. | 6.720 | 6.520 | 6.690 | 7,100 | 0.010 | | 0.15 | 6 |
| OSBCP | Old Second Bancorp Inc. | 7.490 | 7.350 | 7.420 | 5,800 | 0.070 | | 0.95 | 7 |
| OSBK | Osage Bancshares Inc. | 8.350 | 8.350 | 8.350 | 600 | 0.000 | | 0.00 | 6 |
| OSHC | Ocean Shore Holding Co. | 10.90 | 10.80 | 10.84 | 2,400 | 0.07 | | 0.64 | 6 |
| OSHCD | OCEAN SHORE HOLDING CO | 9.120 | 9.000 | 9.050 | 28,400 | 0.120 | | 1.31 | 7 |
| OSIP | OSI Pharmaceuticals Inc. | 58.97 | 58.12 | 58.70 | 1,225,100 | 0.46 | | 0.79 | 7 |
| OSIR | Osiris Therapeutics Inc. | 7.660 | 7.520 | 7.660 | 37,600 | 0.030 | | 0.39 | 7 |
| OSIS | OSI Systems Inc. | 31.20 | 30.40 | 30.98 | 175,800 | 0.45 | | 1.47 | 7 |
| OSTE | Osteotech Inc. | 4.390 | 4.140 | 4.150 | 49,000 | 0.150 | | 3.49 | 6 |
| OSTK | Overstock.com Inc. | 14.55 | 14.01 | 14.16 | 134,600 | 0.48 | | 3.28 | 4 |
| OSUR | OraSure Technologies Inc. | 5.670 | 5.400 | 5.460 | 85,200 | 0.090 | | 1.62 | 6 |
| OTEX | Open Text Corporation | 48.87 | 47.35 | 48.33 | 284,000 | 0.16 | | 0.33 | 6 |
| OTIV | On Track Innovations Ltd | 2.270 | 2.170 | 2.170 | 23,200 | 0.030 | | 1.36 | 6 |
| OTIX | OTIX GLOBAL INC | 0.8800 | 0.8500 | 0.8700 | 10,700 | 0.0200 | | 2.35 | 6 |
| OTT | Otelco Inc. | 16.05 | 15.75 | 15.82 | 18,400 | 0.07 | | 0.44 | 7 |
| OTTR | Otter Tail Corporation | 22.35 | 21.90 | 22.21 | 104,500 | 0.15 | | 0.67 | 5 |
| OUTD | Outdoor Channel Holdings Inc. | 6.620 | 6.380 | 6.510 | 10,800 | 0.150 | | 2.25 | 5 |
| OVBC | Ohio Valley Banc Corp. | 24.23 | 23.67 | 24.22 | 1,300 | 0.19 | | 0.78 | 4 |
| OVLY | OAK VALLEY BANCORP | 4.500 | 4.350 | 4.350 | 1,900 | 0.150 | | 3.57 | 7 |
| OVRL | Overland Storage Inc. | 2.170 | 2.130 | 2.170 | 5,400 | 0.000 | | 0.00 | 7 |
| OVRLD | OVERLAND STORAGE INC | 2.390 | 2.210 | 2.260 | 5,400 | 0.060 | | 2.59 | 8 |
| OVTI | OmniVision Technologies Inc. | 16.00 | 15.45 | 15.70 | 575,700 | 0.26 | | 1.63 | 5 |
| OXBT | OXYGEN BIOTHERAPEUTC | 4.950 | 4.900 | 4.900 | 1,200 | 0.080 | | 1.61 | 4 |
| OXGN | OXiGENE Inc. | 1.220 | 1.200 | 1.200 | 128,800 | 0.010 | | 0.83 | 5 |
| OXPS | optionsXpress Holdings Inc. | 16.80 | 16.48 | 16.55 | 559,700 | 0.32 | | 1.90 | 6 |
| OYOG | OYO Geospace Corporation | 49.68 | 48.74 | 48.85 | 5,500 | 0.55 | | 1.11 | 4 |
| OZRK | Bank of the Ozarks | 34.55 | 33.80 | 33.81 | 106,700 | 0.68 | | 1.97 | 6 |