| Oculis | CH | series-b+ | $114.7M |
| Okteto | US | series-a | $5.0M |
| OLEDWORKS LLC | US | unknown | $2.0M |
| Oligofeed | FR | series-b+ | $2.7M |
| OLIGOMERIX INC | US | unknown | $3.0M |
| Olio Labs | US | seed | $1.0M |
| OMBRA LLC | US | unknown | $2.0M |
| OMNI FED LLC | US | unknown | $2.6M |
| Onc.AI, Inc. | US | unknown | $2.0M |
| Oncomatryx Biopharma | ES | series-b+ | $2.7M |
| OncoveryCare | US | seed | $4.5M |
| One to One Health, Inc. | US | unknown | $12.0M |
| one.five | DE | series-a | $19.4M |
| ONENAV, INC | US | unknown | $1.2M |
| Ontora | US | seed | $1.0M |
| onX | US | series-b+ | $108.0M |
| OPCONDYS INC | US | unknown | $1.5M |
| OPEN X EDUCATION, INC | US | unknown | $1.8M |
| OpiAID, LLC | US | unknown | $1.3M |
| OPTERUS RESEARCH AND DEVELOPMENT, INC | US | unknown | $2.0M |
| Optics11 | NL | series-b+ | $32.4M |
| OPTIMIZATION TECHNOLOGIES, INC. | US | unknown | $2.0M |
| Optiml | CH | pre-seed | $3.8M |
| OPTIPRO SYSTEMS, LLC | US | unknown | $1.8M |
| OPTO-KNOWLEDGE SYSTEMS INC | US | unknown | $3.0M |
| OpZira, Inc. | US | unknown | $1.1M |
| Oraliva, INC. | US | series-b+ | $1.2M |
| ORBIT GENOMICS, INC. | US | unknown | $2.0M |
| Orbital Paradigm | ES | pre-seed | $1.6M |
| Orby AI | US | series-a | $30.0M |
| Orca AI | GB | series-a | $40.0M |
| OREGON RESEARCH BEHAVIORAL INTERVENTION STRATEGIES, INC. | US | unknown | $1.9M |
| Origin Robotics | LV | series-b+ | $9.2M |
| ORPHAGEN PHARMACEUTICALS, INC. | US | unknown | $1.7M |
| OrtCloud | unknown | unknown | $1.7M |
| Ortivity | DE | series-b+ | $216.0M |
| Oshi Health | US | series-b+ | $60.0M |
| OSSIUM HEALTH INC | US | unknown | $1.4M |
| OTHRAM INC | US | unknown | $1.2M |
| OTS ACQUISITION GROUP, LLC | US | unknown | $1.5M |
| Oura | FI | series-b+ | $900.0M |
| Ouro Medicines | US | series-a | $120.0M |
| OUTERLINK CORP | US | unknown | $6.5M |
| Outlook Therapeutics, Inc. | US | unknown | $5.0M |
| OUTPOST TECHNOLOGIES, INC. | US | unknown | $1.9M |
| Outsmart College | US | seed | $1.0M |
| Ovelle Bio Corp. | US | unknown | $7.0M |
| Overcast HQ | IE | seed | $1.2M |
| Overland AI INC | US | unknown | $2.0M |
| OVERLAND AI INC. | US | unknown | $80.0M |
| Overmatch, Inc. | US | unknown | $3.5M |
| Overstand Labs | US | seed | $1.0M |
| Overture Life | ES | series-b+ | $27.0M |
| Overwatch AI | US | pre-seed | $1.5M |
| Overwatch Imaging, Inc | US | unknown | $1.2M |
| Ovoko | LT | series-b+ | $32.4M |
| OWT GLOBAL, LIMITED LIABILITY COMPANY | US | unknown | $1.8M |
| Oxolife | ES | unknown | $2.7M |
| P & J ROBINSON CORP | US | unknown | $2.0M |
| Pacegenix, Inc. | US | unknown | $22.5M |
| Pacific Fusion | US | series-a | $900.0M |
| PAI LIFE SCIENCES INC | US | unknown | $1.4M |
| Pair Team | US | series-a | $5.0M |
| Palabra.ai | GB | pre-seed | $7.8M |
| palma ai Inc. | US | unknown | $1.3M |
| PandasAI | DE | seed | $1.0M |
| PanGIA Biotech | US | unknown | $1.6M |
| Panoptive | US | seed | $1.0M |
| Panora | US | seed | $1.0M |
| Panta | US | seed | $1.0M |
| PARABON NANOLABS, INC. | US | unknown | $1.6M |
| PARAGON ROBOTICS LLC | US | unknown | $1.8M |
| PARAGON SPACE DEVELOPMENT CORPORATION | US | unknown | $1.7M |
| Paragraf | GB | series-b+ | $129.6M |
| Parambil | US | seed | $2.0M |
| ParaNano Wound Care, LLC | US | unknown | $3.0M |
| PARENTHETIC, LLC | US | unknown | $4.1M |
| PARMEDICS, INC | US | unknown | $1.7M |
| PARRAID LLC | US | unknown | $2.0M |
| PARRY LABS, LLC | US | unknown | $2.5M |
| Partcl | US | seed | $1.0M |
| Pasqal | FR | unknown | $32.4M |
| Pathios Therapeutics | GB | series-b+ | $25.3M |
| Paulex Bio Inc. | US | unknown | $18.5M |
| PAXAURIS LLC | US | unknown | $1.5M |
| PayHOA | US | series-a | $27.5M |
| Paymentology | GB | series-b+ | $250.0M |
| Payt | NL | series-b+ | $59.4M |
| Peak Quantum | DE | pre-seed | $5.4M |
| PEAK:AIO | GB | unknown | $6.2M |
| Pear Health Labs, Inc. | US | unknown | $1.9M |
| Pearl Diagnostics, Inc. | US | unknown | $11.2M |
| Pearl Diagnostics, Inc. | US | unknown | $11.2M |
| PECOS WIND POWER INC | US | unknown | $2.5M |
| Pelage Pharmaceuticals | US | series-b+ | $120.0M |
| Pelica | US | seed | $1.0M |
| PENDERIA TECHNOLOGIES, INC. | US | unknown | $1.7M |
| Peptobiotics | NL | series-a | $6.2M |
| Peptomyc | ES | unknown | $2.7M |
| Peraso Inc. | US | unknown | $1.3M |