| Foundation Medicine, Inc. | Clinical Laboratory | Cambridge, MA | 15,460 | $79.7M |
| Quest Diagnostics Massachusetts Llc | Clinical Laboratory | Marlborough, MA | 130,874 | $27.8M |
| Quest Diagnostics Llc | Clinical Laboratory | Marlborough, MA | 134,797 | $27.2M |
| Brewster Ambulance Service Inc. | Ambulance Service Provider | Weymouth, MA | 36,311 | $25.4M |
| Cataldo Ambulance Service Inc | Ambulance Service Provider | Somerville, MA | 15,216 | $11.6M |
| Habit Opco, Llc | Opioid Treatment Program | Springfield, MA | 1,200 | $11.0M |
| Boston Heart Diagnostics Corporation | Clinical Laboratory | Framingham, MA | 15,502 | $9.1M |
| Exosome Diagnostics, Inc. | Clinical Laboratory | Waltham, MA | 11,914 | $8.9M |
| American Medical Response Of Massachusetts Inc | Ambulance Service Provider | Springfield, MA | 12,606 | $8.7M |
| David ReedM.D. | Ophthalmology | Plymouth, MA | 2,760 | $7.7M |
| Torsten WiegandMD | Ophthalmology | Boston, MA | 2,928 | $7.6M |
| Cohen Dermatopathology, P.C. | Clinical Laboratory | Needham, MA | 43,811 | $7.5M |
| Spectrum Health Systems, Inc | Opioid Treatment Program | Worcester, MA | 703 | $6.0M |
| Boston Public Health Commission | Ambulance Service Provider | Boston, MA | 8,202 | $5.9M |
| Coastal Medical Transportation Services Llc | Ambulance Service Provider | Hyannis, MA | 6,179 | $5.2M |
| Coastal Ambulance Llc | Ambulance Service Provider | Hyannis, MA | 8,049 | $5.1M |
| Community Health Care, Inc. | Opioid Treatment Program | Westfield, MA | 594 | $5.1M |
| Chirag ShahMD | Ophthalmology | Boston, MA | 2,444 | $5.0M |
| New England Life Flight, Inc. | Ambulance Service Provider | Bedford, MA | 775 | $5.0M |
| West Suburban Eye Surgery Center Llc | Ambulatory Surgical Center | Waltham, MA | 2,211 | $4.9M |
| Armstrong Ambulance Service | Ambulance Service Provider | Arlington, MA | 6,975 | $4.6M |
| Pridestar Ems Inc | Ambulance Service Provider | Lowell, MA | 5,626 | $4.6M |
| Miriam Englander-Paschalis IliosM.D. | Ophthalmology | Boston, MA | 2,393 | $4.5M |
| Babak Jian SeyedahmadiM.D. | Ophthalmology | East Weymouth, MA | 2,073 | $4.4M |
| U S Lab & Radiology Llc | Clinical Laboratory | Brockton, MA | 18,910 | $4.3M |
| Hesham MalikMD | Diagnostic Radiology | Worcester, MA | 426 | $3.9M |
| Umass Memorial Mri & Imaging Center, Llc | Independent Diagnostic Testing Facility (IDTF) | Worcester, MA | 1,770 | $3.8M |
| Jeffrey Heier | Ophthalmology | Boston, MA | 1,542 | $3.6M |
| Cape Cod Eye Surgery & Laser Center, Llc | Ambulatory Surgical Center | Sandwich, MA | 1,568 | $3.5M |
| Adam ChinM.D. | Ophthalmology | Boston, MA | 1,736 | $3.4M |
| Cataract & Laser Center West, Llc | Ambulatory Surgical Center | West Springfield, MA | 1,636 | $3.4M |
| Action Ambulance Service Inc | Ambulance Service Provider | Wilmington, MA | 5,853 | $3.4M |
| David LallyM.D. | Ophthalmology | Springfield, MA | 952 | $3.2M |
| East Bay Surgery Center Llc | Ambulatory Surgical Center | Swansea, MA | 1,577 | $3.2M |
| Quantum Pathology, Llc | Clinical Laboratory | Waltham, MA | 13,633 | $3.1M |
| Rebecca SoaresM.D. | Ophthalmology | Springfield, MA | 2,065 | $3.0M |
| Coastal Ems Llc | Ambulance Service Provider | Hyannis, MA | 4,304 | $2.9M |
| Andre WitkinM.D. | Ophthalmology | Boston, MA | 995 | $2.9M |
| Professional Ambulance & Oxygen Svc, Inc | Ambulance Service Provider | Cambridge, MA | 4,085 | $2.8M |
| Tina Cleary | Ophthalmology | Boston, MA | 1,284 | $2.8M |
| New England Surgery Center Llc | Ambulatory Surgical Center | Beverly, MA | 89 | $2.8M |
| Scott BarbM.D. | Ophthalmology | Boston, MA | 913 | $2.8M |
| Shields Imaging Of Eastern Massachusetts Llc | Independent Diagnostic Testing Facility (IDTF) | South Weymouth, MA | 769 | $2.7M |
| Delia SangMD | Ophthalmology | Brookline, MA | 1,214 | $2.7M |
| Brigham And Women's Physicians Organization Inc | Radiation Therapy Center | Milford, MA | 257 | $2.7M |
| Beauport Ambulance Inc. | Ambulance Service Provider | Gloucester, MA | 3,631 | $2.7M |
| Baystate Mri & Imaging Center, Llc | Independent Diagnostic Testing Facility (IDTF) | Springfield, MA | 1,604 | $2.6M |
| Howard YingM.D.,PH.D. | Ophthalmology | Cambridge, MA | 1,126 | $2.5M |
| Bryan HongM.D. | Ophthalmology | Worcester, MA | 1,088 | $2.5M |
| North Shore Cataract And Laser Center, Llc | Ambulatory Surgical Center | Stoneham, MA | 1,599 | $2.5M |
| Brad BakerMD | Ophthalmology | Worcester, MA | 861 | $2.5M |
| Gisela VelezM.D. | Ophthalmology | Ayer, MA | 879 | $2.4M |
| City Of Fall River Mass | Ambulance Service Provider | Fall River, MA | 2,729 | $2.4M |
| Shilpa Gulati | Ophthalmology | Springfield, MA | 883 | $2.4M |
| Cataract & Laser Center, Inc. | Ambulatory Surgical Center | Dedham, MA | 1,240 | $2.4M |
| Boston Eye Surgery & Laser Center Trust | Ambulatory Surgical Center | Waltham, MA | 1,292 | $2.4M |
| Marianeli RodriguezMD, PHD | Ophthalmology | Boston, MA | 681 | $2.4M |
| Salvatore NapoliM.D. | Neurology | Foxboro, MA | 219 | $2.3M |
| Angela AhujaMD | Allergy/ Immunology | Chelmsford, MA | 150 | $2.3M |
| Namrata NandakumarMD | Ophthalmology | Peabody, MA | 699 | $2.2M |
| Plymouth Laser Center, P.C. | Ambulatory Surgical Center | Plymouth, MA | 1,103 | $2.2M |
| System Coordinated Services, Inc | Clinical Laboratory | Springfield, MA | 12,125 | $2.1M |
| Boston Eye Surgery & Laser Center Trust | Ambulatory Surgical Center | Boston, MA | 899 | $2.1M |
| Cape Cod Pet/Ct Services Llc | Independent Diagnostic Testing Facility (IDTF) | Sandwich, MA | 615 | $2.1M |
| Emily TierneyM.D. | Dermatology | Hyannis, MA | 1,280 | $2.1M |
| Mark DaceyM.D. | Ophthalmology | East Weymouth, MA | 1,933 | $2.1M |
| Cataract And Laser Center Of The North Shore, Llc | Ambulatory Surgical Center | Andover, MA | 1,236 | $2.1M |
| Michelle LiangM.D. | Ophthalmology | Boston, MA | 936 | $2.1M |
| Alert Ambulance Service, Inc | Ambulance Service Provider | Fall River, MA | 3,216 | $2.0M |
| Kameran LashkariM.D. | Ophthalmology | North Dartmouth, MA | 892 | $2.0M |
| Southcoast Emergency Medical Services Inc | Ambulance Service Provider | Dartmouth, MA | 2,052 | $2.0M |
| Mdsine, Llc | Ambulatory Surgical Center | Springfield, MA | 552 | $1.9M |
| William TangM.D. | Ophthalmology | Natick, MA | 735 | $1.9M |
| Total Wellness Centers, Llc | Clinical Laboratory | Holyoke, MA | 1,489 | $1.9M |
| Eascare Llc | Ambulance Service Provider | Weymouth, MA | 4,766 | $1.9M |
| Harbor Medical Associates, Inc. | Clinical Laboratory | South Weymouth, MA | 10,636 | $1.8M |
| New England Eye Surgical Center Inc | Ambulatory Surgical Center | Weymouth, MA | 1,106 | $1.8M |
| Joshua KatzMD | Neurology | Wellesley, MA | 88 | $1.8M |
| Mehdi NajafiM.D.,PH.D. | Ophthalmology | Brookline, MA | 1,315 | $1.8M |
| Scott BrannanMD | Diagnostic Radiology | Boston, MA | 90 | $1.8M |
| Victor AvilesMD | Hematology-Oncology | North Falmouth, MA | 409 | $1.8M |
| Shields Pet Ct At Berkshire Medical Center Llc | Independent Diagnostic Testing Facility (IDTF) | Pittsfield, MA | 534 | $1.7M |
| North Adams Ambulance Service Inc | Ambulance Service Provider | North Adams, MA | 1,382 | $1.7M |
| Stacey GodmanCRNP | Nurse Practitioner | Woburn, MA | 182 | $1.7M |
| Ari SchwartzMD | Rheumatology | Brockton, MA | 423 | $1.7M |
| City Of New Bedford | Ambulance Service Provider | New Bedford, MA | 2,108 | $1.7M |
| Northeast Regional Ambulance Service, Inc. | Ambulance Service Provider | Middleton, MA | 2,674 | $1.6M |
| George PetersM.D. | Ophthalmology | Worcester, MA | 700 | $1.6M |
| Raphael KievalMD | Rheumatology | Brockton, MA | 465 | $1.6M |
| Orthopedics Surgical Center Of The North Shore Llc | Ambulatory Surgical Center | Peabody, MA | 164 | $1.6M |
| Cataract Laser Centercentral Llc | Ambulatory Surgical Center | Gardner, MA | 630 | $1.6M |
| Shilpa DesaiMD | Ophthalmology | Cambridge, MA | 541 | $1.6M |
| Adam FeldmanMD | Urology | Boston, MA | 253 | $1.6M |
| James StefaterMD, PHD | Ophthalmology | East Weymouth, MA | 751 | $1.6M |
| Elite Bor-ShavitMD | Ophthalmology | Lancaster, MA | 604 | $1.5M |
| Benjamin SolkyM.D. | Dermatology | Boston, MA | 763 | $1.5M |
| Charles River Medical Associates, Pc | Clinical Laboratory | Framingham, MA | 8,226 | $1.5M |
| Frank MccabeM.D. | Ophthalmology | Worcester, MA | 859 | $1.5M |
| Nigel StippaM.D. | Ophthalmology | Pittsfield, MA | 874 | $1.5M |
| Andris ZaulsM.D. | Radiation Oncology | Brockton, MA | 271 | $1.5M |