| A Dozen Cousins | A La Maison | A Vogel | A&D Engineering |
| A&D Medical | A+ Medical | A-T Surgical | A.T. Cross |
| ABL Medical | ACCUSTAMP | ADA International | ADC |
| ADI Medical & Asia Dynamics | AG Industries | AH Robins | AJM |
| AMD Medicom | AMD Ritmed | AO Safety | AOC |
| APC Filtration | ASO Corporation | AST | AVO+ |
| Abbott Nutrition | Abena | Ability One | Able Life |
| Absolute Nutrition | Absolutely Gluten Free | Acco | AccuTec Blades |
| Accuform | Acme | Acon Labs | Acroprint |
| Actavis | Action Bag | Action Products | Active Lifestyle Products |
| Acuderm | Acure | Acusine | Acutens |
| Adams | Addto | Adesso | Adirondack |
| Advanced Medical Systems | Advantus | Adventure Medical Kits | Advocate |
| Agamatrix | AirFoxx | AirPop | AirTite Products |
| Airborne | Airfeet | Aiya | Ak Mak Bakeries |
| Akorn | Akro Mills | Al Dente | Alacer |
| Alaffia | Alba | Alba Botanica | Alba Healthcare |
| Albanese World.s Best | Alcon | Aleia's | Alera |
| Alere | Alessi | Alex Orthopedic | Alfa Wassermann |
| Alimed | AlkaZone | Alkalife | Alkaline 88 |
| All Terrain | All-Med | AllerAir | Allergan Pharmaceutical |
| Alliance Labs | Alliance Rubber | Allied Healthcare | Alliqua |
| Allsop | Alltrista Plastics | Almond Breeze | Almondina |
| Alo | Aloe Cadabra | Aloha Bay | Alpen |
| Alpha ProTech | Alpha Scientific | AlphaChemical | Alpine |
| Alta Health | Alvera | Always Young | AmFab Company |
| Amazing Herbs | Amazon Therapeutic Labs | Ambrosoli | Ambu |
| Ameda | AmerCareRoyal | American Associated Companies | American Biotech Labs |
| American Diagnostic | American Health | American Lifeline | American Power Conversion |
| American Safety Razor | American Screening Corporation | American Tombow | American Tuna |
| Americo | Amerifit | Amneal Akyma Pharmaceuticals | Amoena |
| Amore | Ampad | Amplivox | Amrep |
| Amsino International | Amy's | Anacapa Technologies | Anchor Brand |
| Anchor Packaging | Ancient Harvest | Ancient Organics | Ancient Secrets |
| Anda | Andalou Naturals | Andean Dream | Andover Coated Products |
| Andrew and Everett | Andys | Angelini Pharma | Angie's Kettle Corn |
| Angostura | Anna | Anna's | Annie Chun's |
| Annie's Homegrown | Ansell | Apache Mills | Apex Medicaloration |
| Apex-Carex | Aplicare | Apollo | Apothecary Products |
| Apothecus | Apple and Eve | Applied Medical Technologies | Applied Nutrition |
| Arc Medical | Arcus Medical | Ardo Medical | Argentum Medical |
| Argo Tea | Arizona | Arizona Natural | Arjo |
| Ark Naturals | Arkray | Arlington Scientific | Arm & Hammer |
| Armogear | Armor All | Aroa | Arrow Fastener |
| Arrow International | Arrowhead Healthcare | Arrowhead Mills | Artisan Tropic |
| Artisana | Artistic | Ascensia Diabetes Care | Aseptic Control Products |
| Aspen Surgical Products | At A Glance | At Ease | Atkins |
| Atlantis Plastics | Atos Medical | Atrix International | Attends |
| Augusta Medical Systems | Aura Cacia | Auromere | Aurora Natural Products |
| Australian Gold | Avadim | Avalon | Avanos Medical Sales |
| Avanti | Aveeno | Aventis Pharmaceuticals | Avery |
| Axelgaard Manufacturing | Azer Scientific | Azo | |
