| American Thread | Willimantic | CT |
| American Tube & Stamping | Bridgeport | CT |
| American Woolen | Moosup | CT |
| Amity Regional High School | Woodbridge | CT |
| Anaconda American Brass | Ansonia | CT |
| A.N. Pierson | Cromwell | CT |
| Ansonia Brass & Copper | Ansonia | CT |
| Arena Centerfreeze | New Haven | CT |
| Arrow Electric | Hartford | CT |
| Arwood Precision Casting | Groton | CT |
| Arwood Precision Masting | Groton | CT |
| Asbestos Distributors | Bridgeport | CT |
| Asbestos Distrubutors | Bridgeport | CT |
| Ashcroft Manufacturing | Bridgeport | CT |
| Atlantic Steel | North Haven | CT |
| Atlantic Wire | Branford | CT |
| Atlas Powder | Stamford | CT |
| AT&T | Cheshire | CT |
| Avco | Stratford | CT |
| Avco Lyconing | Stratford | CT |
| Avco Manufacturing | Stratford | CT |
| Avon Old Farms | Avon | CT |
| Babcock Printing Press Manufacturing | New London | CT |
| Baker, Smith & Company | Hartford | CT |
| Ball, Socket Manufacturing | Cheshire | CT |
| Baltic Mills | Baltic | CT |
| Barnum Richardson | Lime Rock | CT |
| Bassic Company Division | Bridgeport | CT |
| Batchelder-Beilin | Botsford | CT |
| Bay | Versailles | CT |
| B.C. Goodwin Tech | New Britain | CT |
| Beardlsey Terrace Housing Project | Bridgeport | CT |
| Bechtel | Bethel | CT |
| Beechmont Daipies | Bridgeport | CT |
| Belfast Mesh Underwear | Torrington | CT |
| Benedict & Burnham Manufacturing | Waterbury | CT |
| Berkliff | Waterbury | CT |
| Berkshire Ice | New Haven | CT |
| Berlington Harwinton School | Harwinton | CT |
| Berlin Heat Treating Company I | Kensington | CT |
| Best Welding | Bridgeport | CT |
| BFGoodrich | Derby | CT |
| BFGoodrich | Shelton | CT |
| Bieber-Goodman Associates | Danbury | CT |
| Bigelow Boiler | New Haven | CT |
| Bigelow-Hartford Carpet | Thompsonville | CT |
| Billings & Spencer | Hartford | CT |
| Bilton Machine Tool | Bridgeport | CT |
| Blickensderfer Manufacturing | Stamford | CT |
| B Lipnick Supply | Bridgeport | CT |
