| Smiths Detection Inc. | Edgewood | MD | $847M |
| Sustainable System Solutions LLC | Huntsville | AL | $262M |
| Mountain Horse LLC | Colorado Springs | CO | $164M |
| Vaisala Inc.Louisville, CO · UEI FCMPZKYCYKH5 | Louisville | CO | $150M |
| Velico Medical, Inc. | Beverly | MA | $140M |
| Tri-tech Forensics, Inc. | Leland | NC | $68.6M |
| Ott Hydromet Corp. | Sterling | VA | $62.6M |
| Campbell Scientific Inc. | Logan | UT | $59.9M |
| Pendar Technologies LLC | Cambridge | MA | $41.2M |
| Mesotech International, Inc. | Rancho Cordova | CA | $39.7M |
| Ceia USA Ltd. | Hudson | OH | $38.3M |
| Thermo Eberline LLC | Franklin | MA | $37M |
| Advanced Measurement Technology Inc. | Oak Ridge | TN | $33.7M |
| Humanetics Innovative Solutions, Inc. | Farmington Hills | MI | $30.5M |
| Waygate Technologies USA LP | Skaneateles | NY | $29.5M |
| Spectral Labs Incorporated | San Diego | CA | $29.4M |
| Ewr Radar Systems Inc. | Saint Louis | MO | $29.2M |
| Team Corporation | Burlington | WA | $29M |
| Sea-bird Electronics, Inc. | Bellevue | WA | $26.6M |
| North Wind Test LLC | Saint Paul | MN | $25.5M |
| Illinois Tool Works Inc. | Norwood | MA | $24.5M |
| Mirion Technologies (canberra), Inc. | Atlanta | GA | $20M |
| Graw Radiosondes GMBH & Co. Kg | Nurnberg | | $19.8M |
| Lockheed Martin Corporation | Niagara Falls | NY | $19.5M |
| MTS Systems Corporation | Eden Prairie | MN | $18.7M |
| NDT Solutions, LLC | New Richmond | WI | $18M |
| Force Measurement Systems, Inc. | Anaheim | CA | $17.1M |
| MRV Systems, LLC | Wood Dale | IL | $16.7M |
| Sun Nuclear Corp. | Melbourne | FL | $15.3M |
| Symetrica Inc. | Westford | MA | $15M |
| Isotech North America Inc. | Colchester | VT | $14.9M |
| Marietta Nondestructive Testing LLC | Marietta | GA | $14.8M |
| Kaymont Consolidated Industries, Inc. | Melbourne | FL | $14.2M |
| L3harris Technologies, Inc. | Amityville | NY | $11.8M |
| H3D Inc. | Ann Arbor | MI | $11.1M |
| Avl Test Systems Inc. | Plymouth | MI | $10.6M |
| Marathon Watch Company Ltd. | Vaughan | ON | $9.71M |
| Meggitt (orange County), Inc. | Irvine | CA | $9.61M |
| Fieldline Industries Inc. | Boulder | CO | $9.39M |
| In-situ, Inc. | Fort Collins | CO | $9.07M |
| Laurus Systems Inc. | Ellicott City | MD | $8.1M |
| Kinemetrics Inc. | Pasadena | CA | $7.51M |
| Willrich Precision Instrument Company, Inc. | Cresskill | NJ | $7.33M |
| G Systems, Inc. | Irving | TX | $7.18M |
| Luxium Solutions, LLC | Hiram | OH | $6.98M |
| Gelsight, Inc. | Waltham | MA | $6.59M |
| Mettler-toledo Autochem, Inc. | Columbia | MD | $5.99M |
| Radiation Detection Technologies, Inc. | Manhattan | KS | $5.97M |
| Cimel Electronique | Paris | | $5.81M |
| Mti Instruments Inc. | Albany | NY | $5.74M |
| Unholtz-dickie Corp. | Wallingford | CT | $5.64M |
| Handix Scientific Inc. | Fort Collins | CO | $5.63M |
| Bubble Technology Industries Inc. | Chalk River | ON | $5.48M |
| Enterprise Electronics Corp. | Enterprise | AL | $5.31M |
| Whoop, Inc. | Boston | MA | $5.21M |
| Vaisala Inc.Burlington, MA · UEI FM3KCUXJ2J61 | Burlington | MA | $4.91M |
| Sensor Technology Engineering LLC | Santa Barbara | CA | $4.9M |
| Ohd LLLP | Birmingham | AL | $4.83M |
| RPX Technologies Inc. | Stillwater | OK | $4.57M |
| Admartec, Inc. | Hazlet | NJ | $4.24M |
| Navigation Electronics, Inc. | Lafayette | LA | $4.14M |
| Tetracore, Inc. | Rockville | MD | $4.04M |
| Seafloor Systems, Inc. | El Dorado Hills | CA | $3.83M |
| Firehud Inc. | Atlanta | GA | $3.7M |
| Light Structures As | Oslo | | $3.67M |
| Chicago Lighthouse Industries | Chicago | IL | $3.62M |
| Geotek Limited | Daventry | NORTHAMPTONSHIRE | $3.44M |
| Mountain Horse, LLC | Union City | TN | $3.37M |
| Polimaster Inc. | Sterling | VA | $3.37M |
| Montana Instruments Corporation | Bozeman | MT | $3.34M |
| Scintec Corporation | Boulder | CO | $3.34M |
| Physics Applications Inc. | Dayton | OH | $3.33M |
| Opti Manufacturing Corporation | Luquillo | PR | $3.31M |
| Fiberqa, LLC | Old Lyme | CT | $3.22M |
| Chemdaq, Inc. | Pittsburgh | PA | $3.13M |
| R. M. Young Company LLC | Traverse City | MI | $3.03M |
| A.k.o. Inc. | Windsor | CT | $3.03M |
| Additive Monitoring, Inc. | Chicago | IL | $2.92M |
| Kessler Thermometer Corp. | West Babylon | NY | $2.87M |
| Vicon Motion Systems, Inc. | Centennial | CO | $2.81M |
| Meter Group Inc. | Pullman | WA | $2.67M |
| Balance Technology Inc. | Whitmore Lake | MI | $2.58M |
| Radiometrics Corporation | Frederick | CO | $2.55M |
| Standard Imaging Inc. | Middleton | WI | $2.51M |
| Silverside Detectors Inc. | Waltham | MA | $2.48M |
| Ludlum Measurements Inc. | Sweetwater | TX | $2.44M |
| Doseoptics LLC | Lebanon | NH | $2.37M |
| Droplet Measurement Technologies, LLC | Longmont | CO | $2.35M |
| Advetage Solutions LLC | El Segundo | CA | $2.16M |
| Technical Representatives, Inc. | Reston | VA | $2.08M |
| Applied Physics Systems, Inc. | Mountain View | CA | $2.02M |
| Vertebrate Systems LLC | San Diego | CA | $1.96M |
| Voyant Photonics Inc. | New York | NY | $1.95M |
| Thermo Environmental Instruments LLC | Franklin | MA | $1.94M |
| International Met Systems Inc. | Grand Rapids | MI | $1.93M |
| Correlated Solutions Inc. | Irmo | SC | $1.92M |
| SKC, Inc. | Eighty Four | PA | $1.92M |
| Hamar Laser Instruments, Inc. | Danbury | CT | $1.82M |
| Met One Instruments, Inc. | Grants Pass | OR | $1.8M |
| Dickson/unigage Inc. | Addison | IL | $1.7M |
