| Company | CIK | Ticker Symbol | Document |
| O'Connell Thomas W | 1405149 | | 4[html] |
| O'Keefe Edward P. | 1481698 | | 4[html] |
| OAK HILL ADVISORS LP | 1164688 | | 13F-HR[html] |
| OAKRIDGE HOLDINGS INC | 73605 | | 10-Q[html] |
| OAKRIDGE INTERNATIONAL CORP | 1439724 | | 10-Q[html] |
| OAKTREE CAPITAL MANAGEMENT LP | 949509 | | 13F-HR[html] SC 13D[html] |
| OBERWEIS ASSET MANAGEMENT INC/ | 937886 | | 13F-HR[html] |
| OBH LLC | 109694 | | 13F-NT[html] |
| OBRIEN JOHN F | 1201982 | | 4[html] |
| OCM HoldCo, LLC | 1353741 | | 10-Q[html] |
| OCONEE FINANCIAL CORP | 1076691 | | 10-Q[html] |
| OCONNOR SEAN MICHAEL | 1208362 | | 4[html] |
| OCWEN FINANCIAL CORP | 873860 | NYSE:OCN | 4[html] 4[html] 4[html] 4[html] 4[html] |
| OConnor John MB | 1351416 | | 4[html] |
| OEP AC Holdings, LLC | 1471604 | | 4[html] |
| OEP General Partner III, L.P. | 1448689 | | 4[html] |
| OEP Parent LLC | 1509226 | | 4[html] |
| OGDEN ROGER | 1076354 | | 4[html] |
| OHIO NATIONAL FUND INC | 315754 | | 485BPOS[html] |
| OHIO NATIONAL VARIABLE ACCOUNT A | 73981 | | 485APOS[html] 485BPOS[html] |
| OLB GROUP, INC. | 1314196 | | 10-Q[html] |
| OLD MUTUAL (US) HOLDINGS INC. | 796370 | | 13F-NT[html] |
| OLD NATIONAL BANCORP /IN/ | 707179 | | 4[html] 4[html] |
| OLIN CORP | 74303 | NYSE:OLN | 4[html] 4[html] 4[html] 4[html] 4[html] 4[html] 4[html] 4[html] |
| OMALLEY THOMAS D JR | 1106004 | | 13F-HR[html] |
| OMEGA PROTEIN CORP | 1053650 | NYSE:OME | 8-K[html] |
| OMEROS CORP | 1285819 | | 4[html] |
| OMNICARE INC | 353230 | NYSE:OCR NYSE:OCR^A NYSE:OCR^B | 4[html] 4[html] 4[html] 4[html] |
| OMNICOMM SYSTEMS INC | 1034592 | | 10-Q[html] |
| ON SEMICONDUCTOR CORP | 1097864 | NASDAQ:ONNN | 4[html] |
| ON TRACK INNOVATIONS LTD | 1021604 | NASDAQ:OTIV | 6-K[html] |
| ONE Bio, Corp. | 1372267 | | 10-Q[html] |
| ONE XL CORP | 1438139 | | NT 10-Q[html] |
| ONEILL THOMAS J/WI/ | 1104634 | | 4[html] |
| OPHTHALMIC IMAGING SYSTEMS | 885317 | | S-8 POS[html] |
| OPPENHEIMER CAPITAL INCOME FUND | 45156 | | CORRESP[html] DEL AM[html] N-14[html] N-14/A[html] |
| OPTI INC | 899297 | | SC 13D/A[html] |
| ORANGE CAPITAL MASTER I, LTD. | 1426813 | | 13F-NT[html] |
| ORANGE CAPITAL, LLC | 1426756 | | 13F-HR[html] |
| ORB Automotive | 1381805 | | NT 10-Q[html] |
| ORBIMED ADVISORS LLC | 1055951 | | 13F-HR[html] |
| ORBIMED CAPITAL LLC | 1157524 | | 13F-NT[html] |
| ORBIS HOLDINGS LTD | 1086504 | | 13F-HR[html] |
| ORBIS INVESTMENT MANAGEMENT LTD | 940594 | | 13F-NT[html] |
| ORBIT FR INC | 1037115 | | NT 10-Q[html] |
| ORBIT INTERNATIONAL CORP | 74818 | NASDAQ:ORBT | 10-Q[html] |
| ORBOTECH LTD | 749037 | NASDAQ:ORBK | 6-K[html] |
| ORGANA GARDENS INTERNATIONAL | 746631 | | NT 10-Q[html] |
| ORIGINOIL INC | 1419793 | | 10-Q[html] |
| ORION FUTURES FUND LP | 1227265 | | 10-Q[html] |
| ORTHOVITA INC | 913756 | NASDAQ:VITA | 8-K[html] SC TO-C[html] SC14D9C[html] |
| OSI OUTSOURCING SERVICES INC | 1058624 | | 424B3[html] |
| OSI Outsourcing Services International, Inc. | 1431658 | | 424B3[html] |
| OSI PORTFOLIO SERVICES INC | 1029715 | | 424B3[html] |
| OSI Recovery Solutions, Inc. | 1431659 | | 424B3[html] |
| OSI SPE LLC | 1431660 | | 424B3[html] |
| OSS CAPITAL MANAGEMENT | 1218321 | | 13F-HR[html] |
| OSTERWEIS CAPITAL MANAGEMENT INC | 1007524 | | 13F-HR[html] |
| OSTERWEIS CAPITAL MANAGEMENT LLC/CA | 1048802 | | 13F-NT[html] |
| OTTER CREEK MANAGEMENT INC | 1226779 | | 13F-HR[html] |
| OUCHI WILLIAM G | 1188884 | | 4[html] |
| OURPETS CO | 1094139 | | 10-Q[html] |
| OVERBY CHARLES L | 1248558 | | 4[html] |
| OVERSTOCK.COM, INC | 1130713 | NASDAQ:OSTK | 4[html] 4[html] 4[html] |
| OWENS MORTGAGE INVESTMENT FUND A CALIF LTD PARTNERSHIP | 841501 | | 10-Q[html] |
| OXIS INTERNATIONAL INC | 109657 | | 10-Q[html] |
| OZ MANAGEMENT LP | 1054587 | | 13F-HR[html] |
| OZ Management II LP | 1476546 | | 13F-NT[html] |
| Oak Hill REIT Management LLC | 1387397 | | 13F-HR[html] |
| Oak Tree Educational Partners, Inc. | 1384086 | | 10-Q[html] |
| Oak Valley Bancorp | 1431567 | NASDAQ:OVLY | 10-Q[html] |
| Oaktree Capital Group Holdings GP, LLC | 1403525 | | 13F-NT[html] |
| Oaktree Capital Group Holdings, L.P. | 1403527 | | 13F-NT[html] |
| Oaktree Capital Group, LLC | 1403528 | | 13F-NT[html] |
| Oaktree Holdings, Inc. | 1403382 | | 13F-NT[html] |
| Oconee Federal Financial Corp. | 1501078 | | 10-Q[html] 8-K[html] |
| Octavian Advisors, LP | 1426664 | | 13F-HR[html] |
| Odelbo Catherine Gillis | 1324067 | | 4[html] |
| Odell Processing Inc. | 1310047 | | 424B5[html] |
| Odey Asset Management Group Ltd | 1512596 | | 13F-HR[html] |
| Odey Asset Management LLP | 1512842 | | 13F-NT[html] |
| Odey Holdings AG | 1512597 | | 13F-NT[html] |
| Odey Robin Crispin William | 1512595 | | 13F-NT[html] |
| Odimo INC | 1292026 | | 10-Q[html] |
| Oilsands Quest Inc | 1096791 | AMEX:BQI AMEX:BQI/WS | 10-K/A[html] |
| Olagues Darren J | 1408305 | | 4[html] |
| Old OSI LLC | 1431657 | | 424B3[html] |
| Oldham Paul R | 1421764 | | 4[html] |
| Olivier Prache | 1520598 | | 3[html] |
| Omagine, Inc. | 820600 | | 10-Q[html] |
| OmniAmerican Bancorp, Inc. | 1470795 | | 4[html] |
| OmniaLuo, Inc. | 1161550 | | 10-Q[html] |
| One Equity Partners III, L.P. | 1448688 | | 4[html] |
| Oneida Financial Corp. | 1485001 | NASDAQ:ONFC | 10-Q[html] 4[html] |
| Online Securities Processing Inc. | 1355637 | | 424B3[html] |
| Online Tele-Solutions, Inc. | 1475065 | | 10-K[html] |
| Onstream Media CORP | 919130 | NASDAQ:ONSM | 10-Q[html] 8-K[html] |
| Opera Jet International Ltd | 1435615 | | 10-Q[html] |
| Opko Health, Inc. | 944809 | AMEX:OPK | 4[html] |
| Oppenheim Asset Management Services S.a.r.l | 1491447 | | 13F-NT[html] |
| Oppenheim Kapital-Gessellschaft mbH | 1491449 | | 13F-NT[html] |
| Oppenheimer Rochester Arizona Municipal Fund | 1357434 | | 485APOS[html] |
| Oppenheimer Rochester Maryland Municipal Fund | 1357435 | | 485APOS[html] |
| Oppenheimer Rochester Minnesota Municipal Fund | 1357431 | | 485APOS[html] |
| Oppenheimer Rochester North Carolina Municipal Fund | 1357430 | | 485APOS[html] |
| Oppenheimer Rochester Ohio Municipal Fund | 1357428 | | 485APOS[html] |
| Oppenheimer Rochester Virginia Municipal Fund | 1357429 | | 485APOS[html] |
| OptimizeRx Corp | 1448431 | | 10-Q[html] |
| Options Media Group Holdings, Inc. | 1413993 | | 8-K[html] |
| Orbis Investment Management (B.V.I.) Ltd | 1413120 | | 13F-NT[html] |
| Orbitronix LP | 1512808 | | 13F-HR[html] |
| Orchard Hill Capital Partners LP | 1514176 | | 13F-HR[html] |
| Orchid Trust | 1499451 | | 4[html] |
| Oriental Dragon Corp | 1368196 | | 10-Q[html] |
| Orion Marine Group Inc | 1402829 | NASDAQ:OMGI | 4[html] 4[html] |
| Oro East Mining, Inc. | 1430174 | | NT 10-Q[html] |
| Orsus Xelent Technologies Inc | 1297024 | | NT 10-Q[html] |
| Outsourcing Solutions Inc. | 1431662 | | 424B3[html] |
| Owen John B | 1331307 | | 4[html] |
| Owl Creek Asset Management, L.P. | 1313756 | | 13F-HR[html] |