| Vendor | Awards | Awarded value | Top agency |
|---|---|---|---|
| Oregon State University - Transportation Services | 3 | $30 | Oregon State Treasury |
| Oregon Woods, Inc. | 3 | $630K | Forest Service |
| The Oregonian | 3 | $548 | Oregon State Treasury |
| O'Reilly Auto Parts | 29 | $14K | City-Parish of Baton Rouge |
| O'Reilly Media Inc | 3 | $50K | San Francisco |
| Orgo-Thermit Inc | 6 | $849K | MTA Procurements |
| Oriental Lumber Inc. | 8 | $3.9M | New York City |
| Origami Risk LLC | 9 | $21M | MTA Procurements |
| Original Footwear Manufacturing BR Inc | 7 | $14M | Defense Logistics Agency |
| Orion Marine Construction, Inc. | 4 | $122M | Department of the Army |
| Orion Strategic Solutions, LLC | 3 | $6.2M | Department of the Navy |
| Oritain USA Inc | 3 | $4.8M | U.S. Customs and Border Protection |
| Orlando World Center Marriott | 4 | $4K | Oregon State Treasury |
| Orrick, Herrington and Sutcliffe, LLP | 12 | $32M | NY State Authorities |
| Orrick Herrington Sutcliffe | 3 | $40M | MTA Procurements |
| Orsat, L.l.c. | 9 | $2.9M | TCEQ |
| Ortho-Clinical Diagnostics | 14 | $510K | Department of the Air Force |
| Orx | 17 | $2.8M | MTA Procurements |
| The Osborne Association Inc. | 9 | $9.6M | New York City |
| Osburn Associates | 5 | $7K | City of Mesquite |
| OSCEOLA STAFFING HOLDINGS, LLC dba Talent Groups | 3 | $45K | Texas DIR |
| Oshkosh Defense LLC | 162 | $174M | Defense Logistics Agency |
| Osi Federal Technologies Inc | 3 | $194K | Department of the Navy |
| Osi Industries, LLC | 13 | $17M | Agricultural Marketing Service |
| Osprey Initiative LLC | 4 | $62K | City-Parish of Baton Rouge |
| Ossining Lawn Mower Service, Inc. | 16 | $737K | MTA Procurements |
| Ostrom Painting & Sandblasting, Inc | 9 | $232K | Department of the Air Force |
| Osts Inc | 6 | $20K | City of Los Angeles Controller |
| Ostyn - Newman, Inc. | 3 | $99K | Department of State |
| Othram Inc | 4 | $1.5M | Bureau of Indian Affairs and Bureau of Indian Education |
| Otis Elevator Co | 14 | $20M | San Francisco |
| Ott Hydromet Corp | 12 | $802K | National Oceanic and Atmospheric Administration |
| Otter Tail Power Co | 14 | $2.8M | Bureau of Indian Affairs and Bureau of Indian Education |
| The Ottery Group, Inc | 3 | $505K | National Park Service |
| Otwells Trucking LLC | 4 | $12K | City-Parish of Baton Rouge |
| Outbackjack LLC | 3 | $88K | Forest Service |
| Outcomes & Incomes, Inc | 3 | $97K | Department of the Army |
| Outfitter Satellite, Inc. | 3 | $23K | Department of the Navy |
| Outfront Media Inc. | 9 | $636K | Department of the Navy |
| Outfront Media Group LLC | 8 | $4.6M | MTA Procurements |
| Ovc-Engineered Solutions LLC | 7 | $193K | Defense Logistics Agency |
| Ove Arup and Partners PC | 3 | $2.2M | NY State Authorities |
| Ove Arup and Partners Consulting Enginee | 6 | $50M | NY State Authorities |
| Overdrive Inc | 19 | $10M | City of Los Angeles Controller |
| Overhaul Support Services, LLC | 5 | $13M | Department of the Army |
| Ovivo USA LLC | 6 | $64K | City-Parish of Baton Rouge |
| O'Wallace Landscaping Inc. | 3 | $1.7M | City of Chicago |
| Owens & Minor Distribution Inc | 3 | $130 | Defense Logistics Agency |
| Owl Inc | 3 | $999K | Department of Veterans Affairs |
| Owt Global, Limited Liability Company | 3 | $203K | Department of the Air Force |
| Owyhee Group Companies | 5 | $417K | Department of the Navy |
| Oxford Instruments America, Inc. | 5 | $1.4M | Department of the Army |
| Oyster Recovery Partnership, Inc. | 3 | $472K | National Oceanic and Atmospheric Administration |
| OZ Door Service Corp. | 3 | $2.1M | New York City |
| Ozkar Services LLC | 14 | $1.6M | NY State Authorities |
| Ozone Park Lumber | 56 | $454M | MTA Procurements |
Vendor totals add up the award records RFPFinder holds: federal contract awards from USAspending.gov for the agencies and codes behind open notices, and state and local awards from open-data contract registers and purchase-order files. They are not a vendor's complete government revenue, and a register that lists a contract ceiling or repeats a contract can overstate spend. Names are grouped across spellings ("Corp" and "Corporation"); each award links to its source record. Subcontracts are prime contractors' subaward reports on USAspending.gov for the prime awards behind the same agencies and codes, and GSA Schedule contracts come from GSA eLibrary's MAS contractor list; both are matched to vendors by name.