| Company | CIK | Ticker Symbol | Document |
| O Kane Michael T | 1334579 | | 4[html] |
| OCEANFREIGHT INC. | 1395593 | NASDAQ:OCNF | 6-K[html] |
| OCWEN FINANCIAL CORP | 873860 | NYSE:OCN | 8-K[html] |
| ODLE SAMUEL L | 1344667 | | 4[html] |
| OHIO LEGACY CORP | 1096654 | NASDAQ:OLCB | 8-K[html] |
| OHIO NATIONAL FUND INC | 315754 | | N-Q[html] |
| OIL STATES INTERNATIONAL, INC | 1121484 | NYSE:OIS | 4[html] 4[html] 4[html] 4[html] 4[html] 4[html] 4[html] 4[html] |
| OLD MUTUAL EMERGING MANAGERS INSTITUTIONAL FUND, LLC | 1384357 | | NSAR-B[html] |
| OLD WESTBURY FUNDS INC | 909994 | | CORRESP[html] CORRESP[html] |
| OLSON CHARLES T | 1256306 | | 4[html] |
| ON SEMICONDUCTOR CORP | 1097864 | NASDAQ:ONNN | 4[html] |
| ONCOR ELECTRIC DELIVERY CO LLC | 1193311 | | EFFECT[html] |
| ONE LIBERTY PROPERTIES INC | 712770 | NYSE:OLP | 4[html] |
| ONYX PHARMACEUTICALS INC | 1012140 | NASDAQ:ONXX | 8-K[html] |
| ONeil Mark F | 1342016 | | 4[html] |
| OPENTABLE INC | 1125914 | | 4[html] 4[html] |
| OPPENHEIMER HOLDINGS INC | 791963 | NYSE:OPY | SC 13G/A[html] |
| ORAMED PHARMACEUTICALS INC. | 1176309 | | 8-K[html] |
| ORASURE TECHNOLOGIES INC | 1116463 | NASDAQ:OSUR | 4[html] |
| ORBAN PAUL W | 1197815 | | 4[html] |
| ORBCOMM Inc. | 1361983 | NASDAQ:ORBC | 4[html] |
| ORBIMED ADVISORS LLC | 1055951 | | 4[html] |
| ORBITAL SCIENCES CORP /DE/ | 820736 | | 4[html] |
| ORBOTECH LTD | 749037 | NASDAQ:ORBK | 424B5[html] 6-K[html] 6-K[html] 6-K[html] |
| ORCHID CELLMARK INC | 1107216 | NASDAQ:ORCH | SC 14D9/A[html] SC TO-T/A[html] |
| ORION ENERGY SYSTEMS, INC. | 1409375 | NASDAQ:OESX | 8-K[html] |
| ORIX CORP | 1070304 | NYSE:IX | 6-K[html] |
| ORRICO BRENT A | 1187851 | | 4[html] |
| OSHKOSH CORP | 775158 | | 4[html] 4[html] 4[html] |
| OSP Services, LLC | 1516183 | | S-3/A[html] S-4/A[html] |
| OWEN DIANE B | 1215505 | | 4[html] |
| OWENS & MINOR INC/VA/ | 75252 | | 4[html] |
| OXFORD TECHNOLOGIES INC | 1169567 | | 10-Q[html] |
| Oestreich Dean C | 1329066 | | 4[html] |
| Ogunlesi Adebayo O. | 1481450 | | 4[html] |
| Old Mutual Emerging Managers Fund, L.L.C. | 1360764 | | NSAR-B[html] |
| Old Mutual Emerging Managers Master Fund, L.L.C. | 1360763 | | NSAR-B[html] |
| Olivier Prache | 1520598 | | 4[html] |
| Olmsted III Francis C | 1476718 | | 4[html] |
| Oncothyreon Inc. | 1412067 | NASDAQ:ONTY | 4[html] |
| Onroerend Goed Beheer- en Beleggingsmaatschappij A. van Herk | 1510621 | | CORRESP[html] |
| Opko Health, Inc. | 944809 | AMEX:OPK | 4[html] |
| Oppenheim Leonard A | 1307647 | | 4[html] |
| Optex Systems Holdings Inc | 1397016 | | 10-Q[html] |
| Optimal Internet Solutions, Inc. | 1455204 | | D/A[html] |
| OrbiMed Capital GP III LLC | 1432241 | | 4[html] |
| Orcutt Mark James | 1451115 | | 4[html] |
| Organic Alliance, Inc. | 1442634 | | SC 13D/A[html] |
| Orion Financial Partners, L.P. | 1470888 | | D/A[html] |