| LMLeavitt Machine CO | Orange | MA | Machinery Manufacturing333512 | — | ◇ UNVERIFIED |
| MFMagnat Fairview INC | Chicopee | MA | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| MFMarket Forge | Everett | MA | Machinery Manufacturing333310 | — | ◇ UNVERIFIED |
| MCMathewson Corporation | Quincy | MA | Machinery Manufacturing333618 | — | ◇ UNVERIFIED |
| MIMestek INC South Bldg | Westfield | MA | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| MPMetso Paper USA INC | Chicopee | MA | Machinery Manufacturing333244 | — | ◇ UNVERIFIED |
| MCMilton Cat | Milford, Town of | MA | Machinery Manufacturing333618 | — | ◇ UNVERIFIED |
| MIMks Instruments INC | Andover | MA | Machinery Manufacturing333242 | — | ◇ UNVERIFIED |
| MCMorse Cutting Tools | New Bedford, City of | MA | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| MHMount Hope Machinery CO | Taunton | MA | Machinery Manufacturing333291 | — | ◇ UNVERIFIED |
| MCMurray Carver Incorporated | East Bridgewater | MA | Machinery Manufacturing333298 | — | ◇ UNVERIFIED |
| MLMurray Lane Trust | Athol | MA | Machinery Manufacturing333120 | — | ◇ UNVERIFIED |
| NINanostone INC. | Waltham | MA | Machinery Manufacturing333310 | — | ◇ UNVERIFIED |
| NENew England Precision Grinding | Holliston | MA | Machinery Manufacturing333512 | — | ◇ UNVERIFIED |
| NRNortheast Repair Center | Canton | MA | Machinery Manufacturing333911 | — | ◇ UNVERIFIED |
| OEOtis Elevator | Agawam | MA | Machinery Manufacturing333921 | — | ◇ UNVERIFIED |
| PMPackage Machinery Company | E Longmeadow | MA | Machinery Manufacturing333298 | — | ◇ UNVERIFIED |
| PMPerkins Machine CO | Warren | MA | Fabricated Metal Product Manufacturing332999 | — | ◇ UNVERIFIED |
| PNPeterson & Nash Incorporated | Hanover | MA | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| RERaytheon Electronic | Quincy | MA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| RRReed Rico - Closed | Holden | MA | Machinery Manufacturing333513 | — | ◇ UNVERIFIED |
| RCRevere Copper &brass | Plymouth | MA | Machinery Manufacturing333293 | — | ◇ UNVERIFIED |
| RIRoyal Institutional Services | Somerville | MA | Machinery Manufacturing333312 | — | ◇ UNVERIFIED |
| RNRuntal North America | Haverhill | MA | Machinery Manufacturing333414 | — | ◇ UNVERIFIED |
| SCSchott Cml Fiberoptics | Marlborough | MA | Machinery Manufacturing333314 | — | ◇ UNVERIFIED |
| S1Sears 1163 | Burlington | MA | Machinery Manufacturing333111 | — | ◇ UNVERIFIED |
| STStandard Thomson CORP | Waltham | MA | Machinery Manufacturing333998 | — | ◇ UNVERIFIED |
| SMSymmetry Medical | New Bedford | MA | Machinery Manufacturing333512 | — | ◇ UNVERIFIED |
| TTTell Tool - Lock House | Westfield | MA | Machinery Manufacturing333514 | — | ◇ UNVERIFIED |
| TIThermo Iec | Needham Heights | MA | Machinery Manufacturing333999 | — | ◇ UNVERIFIED |
| TCThg CORP | Northborough | MA | Machinery Manufacturing333912 | — | ◇ UNVERIFIED |
| UFUS Filter Ionpure INC | Lowell | MA | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| UNUS Naval Air Station | Weymouth | MA | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| VSVarian Semiconductor Equipment | Gloucester | MA | Machinery Manufacturing333242 | — | ◇ UNVERIFIED |
| VVVarian Vacuum Technologies | Lexington | MA | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| VCVulcan CORP | Hingham | MA | Machinery Manufacturing333515 | — | ◇ UNVERIFIED |
| WIWalbar INC | Peabody | MA | Machinery Manufacturing333319 | — | ◇ UNVERIFIED |
| WCWesterbeke Corporation | Avon | MA | Machinery Manufacturing333618 | — | ◇ UNVERIFIED |
| WAWrap Arounds Incorporated | W Springfield | MA | Machinery Manufacturing333248 | — | ◇ UNVERIFIED |
| WSWrentham Steel Products | Wrentham | MA | Machinery Manufacturing333513 | — | ◇ UNVERIFIED |
| XXinetics | Ayer (devens) | MA | Machinery Manufacturing333314 | — | ◇ UNVERIFIED |
| ZTZygo Teraoptix INC | Westborough | MA | Machinery Manufacturing333314 | — | ◇ UNVERIFIED |
| 1S105 Sam Fonzo | Bevelry | MA | Machinery Manufacturing333242 | 20-99 | ◐ LIKELY ACTIVE |
| 1C108 Cherry Hill Drive | Beverly | MA | Machinery Manufacturing333242 | 500+ | ◐ LIKELY ACTIVE |
| 2W283 - Waltham | Waltham | MA | Machinery Manufacturing333120 | 1-19 | ◐ LIKELY ACTIVE |
| ATAgilent Technologies, INC. | Lexington | MA | Machinery Manufacturing333912 | — | ◐ LIKELY ACTIVE |
| ARAmazon Robotics BOS12 | North Reading | MA | Machinery Manufacturing333922 | 500+ | ◐ LIKELY ACTIVE |
| ASAmerican Specialty Grinding | Chicopee | MA | Machinery Manufacturing333515 | 20-99 | ◐ LIKELY ACTIVE |
| AAAngstrom Advanced INC. | Stoughton | MA | Machinery Manufacturing333132 | — | ◐ LIKELY ACTIVE |
 Apple Steel Rule Die Co., Inc. MA | Springfield | MA | Machinery Manufacturing333514 | 1-19 | ◐ LIKELY ACTIVE |
