- Ibis Biosciences, Inc.
- IBL - Hamburg GmbH
- ID Business Solutions Ltd.
- Idaho Technology Inc.
- IDEXX Laboratories Inc
- IDEXX Laboratories Ltd.
- IGEN International Inc.
- IKS International
- Ilmvac (UK) Ltd
- Immunetics, Inc.
- InBios International Inc.
- InDevR, Inc.
- Innogenetics N.V.
- INNOVAPREP
- Innovative Biosensors, Inc
- Instantlabs, Inc.
- Institut VirionSerion GmbH
- Institute of Food Science & Technology
- INTEGRA Biosciences AG
- Integrated DNA Technologies
- IntelligentMDx
- International Association for Food Protection
- International pbi SpA
- International Scientific Supplies Ltd.
- INTERSCIENCE
- Intertek Group
- Invetech
- Invitrogen - European Office
- Invitrogen Corporation
- IQuum, Inc.
- IUL S.A.