| O'Brien, Brett E | 186370 | No Name | 25 | MS7265BU | B1 |
| O'Brien, Conor V | 176152 | Nellie Grace | 28 | 1210895 | B1 |
| O'Brien, David H | 5817 | Shoreline | 20 | MS8599BK | CL |
| O'Brien, Gerald V | 186491 | Dolphin | 28 | 680479 | B1 |
| O'Brien, Joseph W | 182606 | Rum Dog | 30 | 998988 | B1 |
| O'Brien, Kevin P | 142066 | Slapshot | 20 | 937579 | B1 |
| O'Brien, Michael A | 107683 | Marika C | 35 | MS4852BV | CL |
| O'Brien, Thomas W | 185343 | Knot 2 Nite | 20 | MS7170KN | B1 |
| O'Brien, Thomas W | 180230 | Knot 2 Nite | 20 | MS7170KN | SL |
| O'Connell, David T | 1840 | Evan & Graham | 46 | 1268734 | CL |
| O'Connell, James M | 130882 | Not So Easy | 24 | MS2095AL | SR |
| O'Connell, Thomas L | 184875 | Helen Mary | 15 | NH2104BM | RR |
| O'Connell, Timothy K | 6018 | Lady Elaine | 44 | MS6018TK | CL |
| O'Connor, Chris | 179815 | Roccus | 28 | MS6723BL | B1 |
| O'Connor, James J Jr. | 414 | Six Oaks | 22 | MS5503RR | CL |
| O'Farrell, Kevin P | 173123 | Not Named - (Ofarrell) | 18 | MS9980AE | B1 |
| O'Hara Corp | 183377 | Starlight | 87 | 582665 | B2 |
| O'Hara Corp (Fogg, Frank) | 179181 | Sunlight | 109 | 1098004 | B3 |
| O'Keefe, John J | 183774 | Mako | 19 | MS1581BL | B1 |
| O'Keeffe, Timothy E | 183854 | Mermaid Avenue Ii | 37 | 1313456 | B1 |
| O'Leary, Daniel P | 180498 | Scout | 14 | MS9573BE | SR |
| O'Leary, James D | 161354 | Joanie O | 24 | MS5034AX | B1 |
| O'Loughlin, Peter P | 16624 | Kerri Sue | 24 | NH2526TE | CL |
| O'Maley, Charles M | 182048 | Not Named (Omaley) | 20 | MS2618BS | B1 |
| O'Malley, Kevin P | 184423 | 19 Days Ii | 27 | MS6908BM | B1 |
| O'Meara, Mark J | 316 | Gannet Iii | 38 | 542840 | CL |
| O'Neil, Gregory | 53381 | Hawk | 31 | 984450 | B1 |
| O'Reilly, Pat | 173542 | Not Named - (O'Reilly) | 25 | CT4204BM | B1 |
| O'Rourke, Theodore H | 186941 | Muddy Diver | 19 | MS8250TS | B1 |
| O'Sullivan-Place, Cayla F | 180469 | Free Falling | 24 | MS9897SP | SL |
| O'Toole, Luke B | 184717 | Stitches | 23 | VT1124U | B1 |
| O'Toole, Nicholas J | 1544 | Zachary T | 31 | MS4951BD | CL |
| Oaj Inc (Smith, Owen) | 180642 | Relentless | 64 | 599692 | B2 |
| Oakley, Floyd R | 3457 | Andrea Lynn | 21 | MS6256HY | CL |
| Ober, Theodore E | 5788 | Tko | 22 | MS6533AT | CL |
| Obrien Enterprises Inc (O'Brien, William F Iv) | 560 | Krtistine Ann | 36 | 1234093 | CL |
| Obrien, Kevin P | 186255 | Flynfin Ii | 22 | MS8023BV | B1 |
| Ocean Boy, Inc (Alexander, Warren) | 155439 | Ocean Boy | 74 | 544841 | B2 |
| Ocean Breeze Seafood Llc (Otash, Scott A) | 182942 | No Name (Otash ) | 22 | NJ2453HR | B1 |
| Ocean Cousins Fishing, Llc (Pallotta, David A Jr.) | 8905 | Sandra Jean | 45 | MS6985BR | CL |
| Ocean Gold Inc (Alexander, Warren) | 150185 | Ocean Gold | 78 | 1037847 | ON |
| Ocean Harvest Inc (Platz, Theodore A) | 187000 | Louise | 40 | RI8061V | B1 |
| Ocean Life Inc (Woollam, Gordon F) | 176838 | Ocean Life | 34 | 1107832 | B1 |
| Ocean Pacer Inc (Dunlap, Gregory L) | 181867 | Pacer | 73 | 1131546 | B2 |
| Ocean Pride Corportation (Dobre, Fanel) | 177116 | Angela Michelle | 61 | 1092315 | OL |
| Ocean Pride Corportation (Dobre, Fanel) | 186896 | Ann Marie | 51 | 938382 | B1 |
| Ocean Pride, Inc. (Alexander, Warren) | 155209 | Ocean Pride | 79 | 1330866 | ON |
| Ocean Prowler Inc (Alexander, Warren) | 150189 | Ocean Prowler | 84 | 1120035 | ON |
| Ocean Queen Inc (Alexander, Warren) | 182623 | Ocean Queen | 79 | 1312950 | ON |
| Ocean Wave Scallop Co Inc (Alexander, Warren) | 160791 | Ocean Wave | 68 | 280172 | ON |
| Oceanside Sea Farms (Nunez, Devon N) | 185994 | | | | SS |
| Oceanside Sea Farms (Pickard, Benjamin T) | 185988 | | | | SS |
| Ochoco, Aris J | 173932 | Not Named - (Ochoco) | 18 | MS5615BD | B1 |
| Ochoco, Aris J | 170170 | Ohana | 23 | MS4288BJ | B1 |
| Oconnell Shellish (O'Connell, James E) | 107602 | Summer Rules | 18 | MS3599HT | B1 |
| Odd Duck Oyster Company (Chamberlain, Glenn T) | 166366 | | | | SR |
| Odlin, Robert M | 173878 | Maria And Dorthy | 44 | 625108 | B1 |
| Odyssey Scallops Inc (Carillo, Vincent Jr.) | 184223 | Odyssey | 88 | 621918 | B2 |
| Oehme, Seth L | 1818 | Aja O | 36 | 909604 | CL |
| Off-Piste Offshore Llc (Kremidas, John A) | 185272 | Off-Piste | 36 | 1308626 | B1 |
| Offshore Enterprises, Inc | 152531 | Martha B | 42 | 1090277 | B1 |
| Ogiba, Edwin S Jr. | 162911 | | | | SR |
| Ohara Corporation (Enoksen, Ronald) | 153294 | Polaris | 84 | 1198545 | B3 |
| Ohara Corporation (Enoksen, Ronald) | 165554 | Pyxis | 83 | 1238915 | B2 |
| Ohara Corporation (Enoksen, Ronald) | 156343 | Resolution | 95 | 1141511 | ON |
| Ohara Corporation (Enoksen, Ronald) | 173201 | Orion | 92 | 1270244 | ON |
| Ohara Corporation (Enoksen, Ronald) | 156349 | Friendship | 99 | 623188 | ON |
| Ohara Corporation (Enoksen, Ronald) | 167950 | Reliance | 83 | 1248728 | ON |
| Ohara Corporation (Enoksen, Ronald) | 163441 | Weatherly | 91 | 1153437 | B2 |
| Ohara Corporation (Enoksen, Ronald) | 149838 | Nashira | 78 | 553032 | B2 |
| Ohara Corporation (Enoksen, Ronald) | 157064 | Arcturus | 85 | 1219387 | B2 |
| Ohara Corporation (Enoksen, Ronald) | 104712 | Araho | 106 | 606424 | OL |
| Ohara Corporation (Enoksen, Ronald) | 146097 | Ranger | 83 | 1143738 | B2 |
| Ohlson, Robert F | 175775 | Hickory | 22 | MS8050BH | B1 |
| Ohnemus, William C | 6043 | Sea-Gem | 30 | 616414 | CL |
| Ok, Vorn | 184935 | Not Named (Ok) | 20 | MS9991BT | B1 |
| Olander, Fredrick G | 181003 | | | | SS |
| Oliphant, Jonathan R | 185140 | Fish Tales | 24 | MS0613JR | B1 |
| Oliphant, Kyle R | 183402 | Not Named - (Oliphant) | 21 | MS5254BH | B1 |
| Oliva, J0hn L | 185971 | | | | SS |
| Olival, Thomas | 150518 | On Again | 24 | MS8707ZB | B1 |
| Oliveira, Alexander | 184513 | | | | RR |
| Oliveira, Gleiber P | 186361 | | | | RR |
| Oliveira, Pedro | 159206 | Not Named - (Oliveira) | 20 | MS3035AU | RR |
| Oliveira, Roberto | 184514 | Century | 11 | MS5125BT | B1 |
| Oliveira, Rui F | 185178 | Lucky Dog | 25 | MS7528AZ | RR |
| Oliver, Michael H | 172017 | Online | 23 | MS7950AM | B1 |
| Oliver, William E | 611 | Mary Jan | 22 | MS0107W | CL |
| Oliver, William R | 1713 | Four Ollies | 28 | 655796 | CL |
| Olsen, Garrett M | 186464 | No Name | 13 | MS7752BM | B1 |
| Olson, Albert W Jr. | 7115 | Easy Livin Ii | 40 | 961753 | CL |
| Olson, Blake | 174859 | | | | SR |
| Olson, Jennifer E | 186146 | | | | SS |
| Olson, Steven D | 173494 | Reel Knotty | 31 | 1149775 | B1 |
| Olson, Thomas A | 186122 | Not Named - (Olson) | 22 | MS4995HS | RR |
| Olson, William L | 186282 | Mary Margaret | 40 | 1281589 | B1 |
| Olsovsky, Charles | 183328 | Virginia Clipper | 74 | 610863 | B2 |
| Olsovsky, Charles | 152856 | Virginia Dare | 92 | 602653 | B2 |
| On The Bay Oyster (Brister, William C Iv) | 178869 | | | | SS |
| Oneonta Fisheries Inc (Bragdon, Todd) | 148385 | Resilient | 83 | 1038788 | ON |
| Ongaro, Theodore D | 185203 | Fishful Thinking | 23 | MS3757BH | B1 |
| Onofri, Jurandir Jr. | 186010 | No Name (Onofri) | 24 | MS2248BU | B1 |
| Onset Oyster Corp (Pittsley, Dylan) | 174137 | Not Named - (Pittsley) | 27 | MS7666BG | B1 |
| Opie, Douglas B | 184505 | Zuma | 20 | MS2404BU | B1 |
| Oppelt, Michael | 176757 | | | | SS |
| Oquendo, Juan Jo | 186297 | Proline | 23 | MS2643BV | B1 |
| Orcutt, Jeff M | 168337 | Honey Badger | 22 | MS2014BC | B1 |
| Ordeshook, Justin J | 185419 | Bad Habits | 38 | 1137506 | B1 |
| Ordile, Anthony R | 5361 | | | | CL |
| Ordung, Patrick R | 173983 | Drifter | 25 | MS3743BS | B1 |
| Orlando, Andrew J | 181227 | Lillian Grace | 18 | MS0006AJ | B1 |
| Orlando, Anthony | 168382 | Not Named - (Orlando) | 20 | MS1253BN | B1 |
| Orlando, Christopher G | 134930 | Nibsea | 35 | 1052656 | B1 |
| Orlando, Evan K | 171124 | No Name (Orlando) | 14 | MS6964BK | B1 |
| Orlando, Joseph | 92124 | Santo Pio | 47 | 621654 | ON |
| Orlando, Mario J | 182709 | Not Named (Orlando) | 20 | MS2033BR | B1 |
| Orlando, Ryan P | 183107 | | | | SS |
| Orroth, Jonah A | 184923 | | | | SS |
| Orsillo, Chris A | 9319 | Trapper John | 42 | 911382 | CL |
| Ortega, Elias M | 186466 | | | | RR |
| Ortus Charters Llc (Yelle, Scott) | 182259 | Roi | 27 | MS2752BH | B1 |
| Osbahr, William A | 184502 | Privateer | 24 | MS4579AM | B1 |
| Oshaughnessy, Henry T | 163996 | Slainte | 26 | MS1027HO | B1 |
| Osier, David J | 173793 | Blue Water Iii | 56 | 641517 | ON |
| Osier, David J | 162624 | Paulo Marc | 63 | 690278 | ON |
| Osier, Will S | 185724 | The Flash | 24 | MS8566AR | B1 |
| Osmers, John P | 170122 | F/V Grayhaven | 35 | MS7222BN | B1 |
| Osmers, Otto C | 4364 | Right Stuff | 35 | 948005 | CL |
| Osmond, Charles J | 3454 | Joz | 19 | MS6095KN | CL |
| Osowski, Angela J | 156624 | | | | SS |
| Osowski, Carl A | 173869 | Stressed Out | 23 | MS6956BE | B1 |
| Oster, Robert G | 530 | Chelle Rae | 32 | 1024816 | CL |
| Ostler, Ernest | 183087 | | | | SS |
| Ostrander, Stephen T | 175007 | Abby O | 32 | MS4360AM | B1 |
| Ostrander, Stephen T | 179629 | Blue Runner | 25 | MS8400AU | B1 |
| Ostrica Llc (Viscariello, Antonio) | 173572 | Not Named - (Viscariello) | 24 | MS1736BJ | SS |
| Ostrica Llc (Viscariello, Antonio) | 176278 | Not Named (Viscariello ) | 20 | MS8619BH | B1 |
| Otoole, Michael P | 168435 | Not Named - (Otoole) | 25 | MS4169BF | B1 |
| Otw, Llc (Schofield, Brady M) | 180592 | Nordic Prospector | 112 | 635986 | B3 |
| Ouellet, Joel M | 181501 | Not Named - (Ouellet) | 19 | MS0017JZ | B1 |
| Ouellet, Joel M | 166908 | Tuna Vibes | 32 | MS3956BM | B1 |
| Ouellette, Justin M | 179155 | Sea Dog | 21 | MS5783BL | B1 |
| Ouellette, Nicholas G | 179346 | Miss Cas-Sea | 20 | MS6547BV | B1 |
| Ouillette, Edward J | 107648 | Not Named - (Ouillette) | 18 | MS3733KV | RR |
| Ouk, Bolen | 178111 | Reel Ez | 20 | MS5503BR | B1 |
| Oung, Vannarith | 170574 | Not Named - (Oung) | 18 | RI3039T | B1 |
| Oung, Vannary | 165590 | Not Named - (Oung) | 20 | RI6723W | B1 |
| Our, John D | 179304 | Jack Tarr | 31 | 10190395 | B1 |
| Our, John D | 1173 | Barbara O | 42 | 1152077 | B1 |
| Our, John L Jr. | 71350 | Miss Fitz | 42 | 983256 | ON |
| Ourique, Jose L | 180098 | Grandpa | 20 | MS3691BN | B1 |
| Outerbeach Shellfish Farm (Sprague, William D) | 184761 | No Name (Sprague) | 16 | MS2290HD | SR |
| Outta Bed Oys Co/Everjay Shell Inc (Bruinooge, Evan K) | 93000 | | | | IN |
| Owen, Brandon | 186792 | Sandsy Cheeks | 21 | MS8192BU | B1 |
| Owen, Brandon | 167498 | Reel Tight | 32 | 695681 | B1 |
| Owen, Carlos J | 138908 | Reel Tight | 32 | 695681 | B1 |
| Owens, Mark E | 184607 | Miss Elizabeth | 26 | MS3882BR | B1 |
| Oxton, Timothy J | 185986 | | | | EO |
| Oxton, Timothy J | 183171 | Colette Ivy | 44 | 1061983 | B1 |
| Oyster Harbor Farms (Parent, Matthew C) | 143573 | Fleetion Ride | 21 | MS4295AF | B1 |
| Oyster Lane Shellfish (Barrio, William) | 156455 | Not Named - (Barrio) | 24 | MS0601WB | B1 |
| Ozolins, Shawn J | 151927 | No Payment | 26 | MS1217SA | B1 |
| Olson, Barbara T | 184571 | | | | SS |