| Name | Address | Sanction Type | Other Name/Logo | Nationality | Effect Date | Lapse Date | Grounds |
| Oceanic Construction and Engineering Nigeria Limited | Nigeria | Debarred | | Non ADB Member Country | 8/Jul/2019 | Until Further Notice | Cross-Debarment: AfDB |
| ODELGA MED GES.M.B.H. | CARLBERGERGASSE 68, 1230 VIENNA, AUSTRIA | Debarred | | Austria | 25/Jun/2021 | 7/Jun/2027 | Cross-Debarment: WB |
| Ogon-Asu Company Limited | 47 Haile Selassie Street, Asokoro, Abuja, FCT, Nigeria | Debarred | | Nigeria-Non ADB Member Country | 21/Mar/2023 | Until Further Notice | Cross-Debarment: AfDB |
| Ogon, William Tuku | 47 Haile Selassie Street, Asokoro, Abuja, FCT, Nigeria | Debarred | Mr. William Tuku Ogon | Nigeria-Non ADB Member Country | 21/Mar/2023 | Until Further Notice | Cross-Debarment: AfDB |
| OJOKO, HENRY CHINEDU | PROPRIETOR
EMMAJOKO NIG ENTERPRISES
NO. 4 ONYEMEKAIHA CLOSE, OPP. THE AIRPORT, WARRI, OKPE L.G.A, DELTA STATE Nigeria | Debarred | | Non ADB Member Country | 4/Mar/2019 | Until Further Notice | Cross-Debarment: WB |
| OJOKO, ROBINSON EKENEDILICHUKWU | NO. 2, PINTO
AVENUE, GANA
SAPELE, DELTA STATE
Nigeria | Debarred | | Nigeria-Non ADB Member Country | 4/Mar/2019 | Until Further Notice | Cross-Debarment: WB |
| Olcina, Javier Feliú | Calle 50 con calle Elvira Méndez, Edificio Financial Center (Towerbank), Piso 29,
Panama City, Panama | Debarred | Javier Olcina Feliú | Spain | 18/Apr/2022 | 24/Mar/2031 | Cross-Debarment: IDB |
| OLIVE HEALTH CARE | REGISTERED OFFICE: GODREJ COLISEUM, SOMAIYA HOSPITAL ROAD, B-3, 2ND FLOOR, SION (EAST), MUMBAI 400 022 India | Debarred | | India | 17/Aug/2017 | 20/Jan/2028 | Cross-Debarment: WB |
| ON-TRACK TECHNICAL SERVICES LIMITED | PLOT 1, KIBUGA BLOCK, MENGO, P.O BOX 75101, KAMPALA
Uganda | Debarred | | Uganda-Non ADB Member Country | 6/Jan/2020 | Until Further Notice | Cross-Debarment: AfDB |
| One-Chem Industrial Sales Philippines | 9319 Lopez Avenue
Batong Malaki
Los Banos, Laguna
PHILIPPINES 4030 | Debarred | | Philippines | 13/Feb/2015 | Until Further Notice | Violated ADB's Integrity Principles and Guidelines 2.A(i), (ii), (iv), (vii) and Procurement Guidelines 1.14(a)(i), (ii), (iv). |
| ONWUKA, PATRICK ALOZIE | SUITE B.39 SHIRKIR PLAZA, GARKI, ABUJA Nigeria | Debarred | | Non ADB Member Country | 7/Feb/2018 | Until Further Notice | Cross-Debarment: WB |
| OOO FIDES SOLUTIONS | ROOM 25A, NO. 50, OYBEK STREET, TASHKENT
UZBEKISTAN
| Debarred | | Uzbekistan, Rep. of | 22/Jul/2019 | Until Further Notice | Cross-Debarment: WB |
| OOO RBC CENTER (CURRENTLY KNOWN AS OOO ARMADA CENTER) | 15, 5TH
DONSKOY
PROEZD,
BUILDING 6,
117344, MOSCOW
Russian Federation | Debarred | | Non ADB Member Country | 2/Jun/2014 | Until Further Notice | Cross-Debarment: WB |
| OPUA, ALEX | PLOT 1442
NAMUGONGO ROAD
P.O.BOX 10916, KAMPALA
Uganda | Debarred | | Non ADB Member Country | 21/Aug/2013 | Until Further Notice | Cross-Debarment: WB |
| OREGON PACIFIC INTERNATIONAL CO. LTD. | SMALL
INDUSTRIES
CENTRE 102,
MA’UFANGA, NUKU’ALOFA
Tonga | Debarred | | Tonga | 2/Sep/2016 | Until Further Notice | Cross-Debarment: WB |
| OROZCO, SEALTIEL | CENTRO
COMERCIAL SAN
FRANCISCO
MODULO H-4,
MANAGUA,
NICARAGUA | Debarred | | Non ADB Member Country | 30/Sep/2011 | Until Further Notice | Cross-Debarment: WB |
| Ortiz, Albert Alejandro Rincón | Carrera 12 97-80 Oficina 605, Bogotá, Colombia | Debarred | Albert Alejandro Ortiz Rincón, Mr. Ortiz | Colombia-Non ADB Member Country | 3/Oct/2023 | 31/Aug/2031 | Cross-Debarment: IDB |
| OSORIO, JUAN ELDER | 6A AVENIDA "A" 13-24, ZONA 9, OFICINA 103, TORRE EMPRESARIAL CANET, GUATEMALA
Guatemala | Debarred | | Non ADB Member Country | 6/Jan/2020 | 9/Sep/2024 | Cross-Debarment: IDB |
| OSORIO, NICOLÁS MAURICIO IRÍAS | COLONIA LA
GRANJA, JUTICALPA, OLANCHO
Honduras | Debarred | | Non ADB Member Country | 6/Mar/2019 | Until Further Notice | Cross-Debarment: WB |
| OSTEK CONSTRUCTION ELECTRIC AUTOMATION SYSTEM TECHNOLOGIES LTD. | MEŞRUTIYET
CAD. HATAY SK.
NO: 20/7, KIZILAY, ANKARA
Turkey | Debarred | | Turkey | 27/Feb/2014 | Until Further Notice | Cross-Debarment: WB |
| Otieno, Joram Opala Mr. (also known as Mr. Joram OPALA) | CBD, Suna Building, Sirare Road East/Wesweta 1/32, P.O. Box 32, Starehe District, Suna, Nairobi, KENYA | Debarred | | Kenya-Non ADB Member Country | 25/Feb/2022 | Until Further Notice | Cross-Debarment: AfDB |
| P-SQUARE ASSOCIATES, CO. | UNIT 4A, 4TH FLOOR, J&P BUILDING, LOT 3, BLK 17.V.V. SOLIVEN AVE 1, SAN ISIDRO, CAINTA RIZAL Philippines | Debarred | | Philippines | 27/Mar/2018 | Until Further Notice | Cross-Debarment: WB |
| PALAC, ENG. JOSE | UNIT 4A, 4TH FLOOR, J&P BUILDING, LOT 3, BLK 17.V.V. SOLIVEN AVE 1, SAN ISIDRO, CAINTA RIZAL Philippines | Debarred | | Philippines | 27/Mar/2018 | Until Further Notice | Cross-Debarment: WB |
| Pamatong, Alex V. | Alex V. Pamatong Trading and Construction
Baloy, Tablon
Cagayan De Oro City
PHILIPPINES | Debarred | | Philippines | 20/Oct/2004 | Indefinitely | Sanction violation. |
| Peña, Fernando Bladimir Pineda | Residencia Villa del Sol Ill, Senda 64, Número 77, llopango, El Salvador | Debarred | Fernando Bladimir Peña Pineda | El Salvador-Non ADB Member Country | 12/Jan/2023 | 27/Oct/2027 | Cross-Debarment: IDB |
| Perfect Dredging Company Pvt. Ltd. | Suite No. 205, II Floor, Plaza Centre, #129 G.N. Chetty Road Chennai 600 006, Tamil Nadu, India | Debarred | | India | 22/Jan/2024 | 16/Jan/2031 | Cross-Debarment: WB |
| PHAM, HONG HA (MR.) | B14 BUILDING, LANE 65, PHAM NGOC THACH STREET, HANOI, VIETNAM | Debarred | MR. PHAM HONG HA | Socialist Republic of Viet Nam | 6/Feb/2023 | 1/Mar/2028 | Cross-Debarment: WB |
| Phirom, Syani (Ms.) | No. 06, National Road No. 5 & St.1, Sangket Charng Chamres II, Khan Russey Keo, Phnom Penh, CAMBODIA | Debarred | | Cambodia | 12/Jul/2011 | Indefinitely | Sanction violation |
| PICSA Proyectos de Ingeniería Civil y Sanitaria | Diagonal 12, 10-61, Zona 1
Quetzaltenango, Guatemala | Debarred | | Non ADB Member Country | 21/Dec/2015 | Indefinitely | Cross-Debarment: IDB |
| PIONEER CONSTRUCTION LTD. | PLOT 2B, 5TH
STREET CLOSE
INDUSTRIAL
AREA, P.O. BOX
21160, KAMPALA
Uganda | Debarred | | Non ADB Member Country | 6/Jan/2015 | Until Further Notice | Cross-Debarment: WB |