| ADDISON ADVISORS LLC | 34899 | 2010-06-29 | Active | MIDDLEBURY |
| ADDISON ALLIES NETWORK, INC. | 346667 | 2018-08-14 | Active | Middlebury |
| ADDISON ASSOCIATES IN OBSTETRICS AND GYNECOLOGY, INC. | 85086 | 1981-10-30 | Dissolved | MIDDLEBURY |
| Addison Association of the United Church of Christ Inc. | 483076 | 2025-12-17 | Active | Bristol |
| ADDISON AUTO AND SMALL ENGINE LLC | 385187 | 2021-03-03 | Revoked | addison |
| ADDISON BIBLE FELLOWSHIP | 47395 | 1986-08-08 | Revoked | VERGENNES |
| ADDISON BROADCASTING COMPANY, INC. | 120726 | 2000-08-04 | Revoked | MIDDLEBURY |
| ADDISON BROADCASTING, INC. | 67180 | 1973-02-16 | Revoked | MIDDLEBURY |
| ADDISON CAPITAL PARTNERS, LLC | 13052 | 2003-06-04 | Revoked | BRISTOL |
| ADDISON CAPITAL PARTNERS, LLC | 16008 | 2005-07-21 | Inactive | BURLINGTON |
| ADDISON CENTRAL EDUCATIONAL ENDOWMENT FUND, INC. | 47695 | 1987-04-20 | Revoked | MIDDLEBURY |
| ADDISON COMMUNITY ATHLETICS FOUNDATION, INC. | 92769 | 2012-09-21 | Active | Middlebury |
| ADDISON CONSULTING LLC | 23397 | 2007-02-20 | Suspended | MIDDLEBURY |
| ADDISON CORPORATION | 54197 | 1958-12-29 | Dissolved | BURLINGTON |
| ADDISON COUNTY 4-H FOUNDATION, INC. | 40967 | 1969-03-06 | Active | Middlebury |
| ADDISON COUNTY ALIGNMENT & REPAIR INC | 437103 | 2023-10-30 | Active | New Haven |
| Addison County Automotive, LLC | 488249 | 2026-03-16 | Active | vermont |
| ADDISON COUNTY BARNS OF VERMONT, LLC | 6643 | 2002-02-21 | Revoked | MIDDLEBURY |
| ADDISON COUNTY BENEFIT PULL CO. | 294504 | 2014-08-19 | Revoked | Addison |
| ADDISON COUNTY BIKE CLUB INCORPORATED | 332946 | 2017-07-20 | Active | Middlebury |
| ADDISON COUNTY BOARD OF REALTORS | 40969 | 1979-01-15 | Merged | Berlin |
| ADDISON COUNTY BUILDERS INC | 65771 | 1972-03-02 | Revoked | FERRISBURG |
| ADDISON COUNTY BUILDERS, INC. | 106453 | 1991-01-04 | Revoked | FERRISBURG |
| ADDISON COUNTY BUYERS CLUB, INC. | 40970 | 1975-09-19 | Revoked | — |
| ADDISON COUNTY CAR WASH, INC. | 109527 | 1993-01-04 | Revoked | VERGENNES |
| ADDISON COUNTY CHAMBER OF COMMERCE, INC. | 40971 | 1969-04-30 | Active | Ferrisburgh |
| ADDISON COUNTY CHIROPRACTIC CENTER, LLC | 13636 | 2010-05-20 | Active | Vergennes |
| ADDISON COUNTY CHURCH OF CHRIST | 40973 | 1981-03-10 | Revoked | — |
| ADDISON COUNTY CITIZENS FOR VERMONT'S FUTURE | 48760 | 1989-04-24 | Revoked | SALISBURY |
| ADDISON COUNTY COMMISSION SALES, INC. | 114011 | 1995-10-04 | Active | MIDDLEBURY |
| ADDISON COUNTY COMMUNITY ACTION GROUP, INC. | 40974 | 1965-10-28 | Active | MIDDLEBURY |
| ADDISON COUNTY COMMUNITY REVIEW BOARD, INC. | 54786 | 1998-01-23 | Dissolved | MIDDLEBURY |
| ADDISON COUNTY COMMUNITY SUPPORT, INC. | 385477 | 2021-03-08 | Dissolved | Middlebury |
| ADDISON COUNTY COMMUNITY TRUST | 49030 | 1989-09-29 | Active | VERGENNES |
| ADDISON COUNTY COUNCIL CHURCH WOMEN UNITED | 46413 | 1984-03-20 | Revoked | MIDDLEBURY |
| ADDISON COUNTY COURT DIVERSION & COMMUNITY JUSTICE PROJECTS | 40976 | 1980-07-28 | Active | MIDDLEBURY |
| ADDISON COUNTY CRIME STOPPERS | 51366 | 1993-06-07 | Revoked | MIDDLEBURY |
| ADDISON COUNTY DAIRY CONSULTING INC. | 307110 | 2015-09-08 | Active | Weybridge |
| ADDISON COUNTY DAIRY HERD IMPROVEMENT ASSOCIATION, INC. | 40975 | 1958-10-29 | Revoked | W. RIVER JCT |
| ADDISON COUNTY DAIRY PROMOTION, INC. | 78664 | 2007-04-09 | Revoked | BRIDPORT |
| ADDISON COUNTY DENTAL CENTER, INC. | 278304 | 1977-06-13 | Dissolved | — |
| ADDISON COUNTY EAGLES AERIE 3801 | 40977 | 1980-08-11 | Active | VERGENNES |
| ADDISON COUNTY EAGLES AUXILIARY #3801, INC. | 48111 | 1988-03-23 | Active | VERGENNES |
| ADDISON COUNTY ECONOMIC DEVELOPMENT CORPORATION | 40978 | 1976-12-06 | Revoked | — |
| ADDISON COUNTY ECONOMIC DEVELOPMENT CORPORATION | 50308 | 1991-11-18 | Active | MIDDLEBURY |
| ADDISON COUNTY ELECTRIC LLC | 381105 | 2020-12-10 | Revoked | Bristol |
| ADDISON COUNTY FAIR AND FIELD DAYS, INCORPORATED | 40979 | 1951-08-14 | Active | Vergennes |
| ADDISON COUNTY FARM BUREAU ASSOCIATION INCORPORATED | 40980 | 1934-03-16 | Active | New Haven |
| ADDISON COUNTY FARM WORKERS COALITION, INC. | 92110 | 2012-01-23 | Revoked | MIDDLEBURY |
| ADDISON COUNTY FIREFIGHTER'S ASSOCIATION INC. | 40982 | 1964-03-26 | Dissolved | — |