A
- ABAC
- ABAQUE
- ABB
- ABEL
- ABEX
- ABM
- ABO
- ABS
- AC Motors
- ACE
- ACO
- AEG
- AKG
- AMI Oleodinamica
- AMRI
- ASCO
- ATOS
- AVK
- Actaris
- Actreg
- Adaptaflex
- Adler
- Aegex Technologies
- Aerzener
- AfiNox
- Agilent
- Aignep
- Airmar
- Airtac
- Airtec
- Airtorque
- Akasaka
- Alamarin Jet
- Albin
- Alfa Laval
- Alfa Valvole
- Alfagomma
- All-Flo
- Allen-Bradley
- Allison
- Allweiler
- Almatec
- Almig
- Alstom
- Altronic
- Alup
- Amafilter
- Ameroid
- Ametek
- Amiad
- Amot
- Ampco
- Amphenol
- Anderson Greenwood
- Andritz
- Ansell
- Anybus
- Apollo
- Apollo Valves
- Appleton
- Aqua Signal
- Aquametro
- Arca
- Argo-Hytos
- Armstrong
- Armstrong International
- Asahi
- Ashcroft
- Atlas Copco
- Autronica
- Ayvaz
- Azcue