| TECOMET | Charlesbank Capital Partners | 60.99 |
| CERTAINTEED LLC | Saint-Gobain | 52.75 |
| HITCHINER COUNTERGRAVITY CAST OPERATIONS (VCO/DCO/MCT) | HITCHINER MANUFACTURING CO INC | 32.77 |
| PROTO LABS INC. | PROTO LABS INC | 26.70 |
| PROTO LABS INC | PROTO LABS INC | 26.70 |
| ISOMEDIX OPERATIONS INC. | STERIS | 24.22 |
| CHROMA COLOR CORP | Arsenal Capital Partners | 9.29 |
| BOYD CORP INC. | Goldman Sachs | 8.46 |
| AVIENT COLORANTS USA LLC - HOLDEN FACILITY | Avient Corporation | 7.25 |
| PARADIGM PRECISION HOLDINGS LLC | Pursuit Aerospace | 4.87 |
| INNER-TITE CORP. | INNER-TITE CORP. | 4.07 |
| PARKER HANNIFIN CORP CHOMERICS DIV | Parker-Hannifin | 3.98 |
| KOMTEK FORGE LLC | Crawford United | 3.72 |
| PACE INDUSTRIES - CAMBRIDGE DIV | Pace Industries | 3.71 |
| MEXICHEM SPECIALTY COMPOUNDS | Orbia Advance Corporation | 2.72 |
| METSO AUTOMATION USA INC | Valmet Oyj | 2.28 |
| ADVANCE COATINGS CO | ADVANCE COATINGS CO | 2.14 |
| LUBRIZOL ADVANCED MATERIALS INC | Berkshire Hathaway | 1.48 |
| CHEMGENES CORP | CHEMGENES CORP | 1.24 |
| S&E SPECIALTY POLYMERS LLC | Nautic Partners | 0.92 |
| WYMAN-GORDON CO | Berkshire Hathaway | 0.51 |
| WORTHEN INDUSTRIES INC UPACO DIV | Worthen Industries | 0.46 |
| AMPHENOL APC INC | Amphenol | 0.38 |
| VERANOVA L.P. | Altaris Capital Partners | 0.35 |
| COORSTEK IGNITER PRODUCTS | COORSTEK INC | 0.32 |
| NYACOL NANOTECHNOLOGIES INC | NYACOL NANOTECHNOLOGIES INC | 0.31 |
| ENTEGRIS INC | Entegris | 0.23 |
| OMNOVA SOLUTIONS | Synthomer | 0.14 |
| NEWARK AMERICA | Greif Inc. | 0.12 |
| EXXON MOBIL CORP EVERETT TERMINAL | Exxon Mobil | 0.08 |
| KENDALL GREEN ENERGY LLC | Antin Infrastructure Partners | 0.06 |
| PHOTOFABRICATION ENGINEERING I NC | THE PARTNER COS LLC | 0.06 |
| HOLCIM - NER INC. | Holcim Group | 0.06 |
| BENCHMARK ELECTRONICS NH DIV | Benchmark Electronics | 0.05 |
| COLT REFINING INC | COLT REFINING INC | 0.05 |
| ALLCOAT TECHNOLOGY INC | ALLCOAT TECHNOLOGY INC | 0.05 |
| WYMAN-GORDON CO | Berkshire Hathaway | 0.04 |
| ANALOG DEVICES INC/WILMINGTON MANUFACTURING | Analog Devices Inc. | 0.04 |
| AVCARB MATERIAL SOLUTIONS | Arsenal Capital Partners | 0.02 |
| DAMPNEY CO INC | DAMPNEY CO INC | 0.02 |
| VIBRAM CORP | VIBRAM USA | 0.02 |
| MAJILITE MANUFACTURING INC | MERIDIAN INDUSTRIES INC | 0.02 |
| NITTO DENKO AVECIA INC. | Nitto Denko | 0.02 |
| SPECIALTY MATERIALS INC. | Global Materials | 0.02 |
| SAINT-GOBAIN ABRASIVES & SAINT -GOBAIN CERAMICS & PLASTICS | Saint-Gobain | 0.01 |
| INTERNATIONAL RECTIFIER HIREL PRODUCTS INC. | Infineon Technologies | 0.01 |
| DUNCAN GALVANIZING CORP. | DUNCAN GALVANIZING CORP. | 0.01 |
| HARCROS CHEMICALS INC | Harcros Chemicals | 0.01 |
| COVESTRO LLC | Covestro | 0.01 |
| PANDOLF PERKINS CO | EH PERKINS CONSTRUCTION INC | 0.01 |
| EMD MILLIPORE CORP | Merck KGaA (EMD) | 0.01 |
| HOLLINGSWORTH & VOSE CO WEST GROTON | HOLLINGSWORTH & VOSE CO | 0.01 |
| IDEAL TAPE CO | American Biltrite | 0.01 |
| ROHM & HAAS ELECTRONIC MATERIALS LLC | DuPont de Nemours | 0.01 |
| BRADFORD INDUSTRIES | Wembly Enterprises | 0.01 |
| HIGHLINE WARREN LLC | Pritzker Group | 0.00 |
| SEAMAN PAPER CO. OF MASSACHUSETTS INC. | SEAMAN PAPER CO. OF MASSACHUSETTS INC. | 0.00 |
| HAARTZ CORP | HAARTZ CORP | 0.00 |
| UNIVAR SOLUTIONS USA INC. - TEWKSBURY MA | Apollo Global Management | 0.00 |
| CIRCUIT CONNECT INC | Infinitum | 0.00 |
| AMERICAN SUPERCONDUCTOR | American Superconductor Corp. | 0.00 |
| BRONZE CRAFT CORP | BRONZE CRAFT CORP | 0.00 |
| EDWARDS VACUUM LLC | Atlas Copco | 0.00 |
| NISSHA METALLIZING SOLUTIONS | NISSHA METALLIZING SOLUTIONS | 0.00 |
| TEKNOR APEX ELASTOMERS INC. | TEKNOR APEX | 0.00 |
| FM CALLAHAN & SON INC | FM CALLAHAN & SON INC | 0.00 |
| STRAUMANN MANUFACTURING INC | STRAUMANN MANUFACTURING INC | 0.00 |
| LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | LEWCOTT CORP D/B/A BARRDAY COMPOSITE SOLUTIONS | 0.00 |
| MORGAN ADVANCED CERAMICS INC | Morgan Advanced Materials | 0.00 |
| DAV-TECH PLATING INC. | DAV-TECH PLATING INC. | 0.00 |
| JG MACLELLAN CONCRETE CO INC | JG MACLELLAN CONCRETE CO INC | 0.00 |
| ICP CONSTRUCTION | CPC HOLDING LLC | 0.00 |
| BENEVENTO SAND & STONE CORP | BENEVENTO SAND & STONE CORP | 0.00 |
| FLEXCON CO INC. | FLEXCON HOLDINGS TRUST | 0.00 |
| BROX INDUSTRIES INC | Brox Industries | 0.00 |
| WORTHEN INDUSTRIES | Worthen Industries | 0.00 |
| SAEILO ENTERPRISES | SAEILO ENTERPRISES INC | 0.00 |
| BAE SYSTEMS INFORMATION & ELECTRONIC SYSTEMS INTEGRATION | BAE Systems | 0.00 |
| HOLDEN TRAP ROCK | MA BROKEN STONE CO | 0.00 |
| JG MACLELLAN CONCRETE CO INC | JG MACLELLAN CONCRETE CO INC | 0.00 |
| US PACK INC | US PACK INC | 0.00 |
| VICOR CORP | Vicor Corp. | 0.00 |
| TRESCA BROTHERS SAND & GRAVEL | TRESCA BROTHERS SAND & GRAVEL | 0.00 |
| MARMON UTILITY LLC | Berkshire Hathaway | 0.00 |
| BENJAMIN MOORE & CO-MILFORD | Berkshire Hathaway | 0.00 |
| MATEP LLC | Longwood Energy Partners | 0.00 |
| CAMGER COATINGS SYSTEMS INC | CAMGER COATINGS SYSTEMS INC | 0.00 |
| HOLCIM - NER INC. | Holcim Group | 0.00 |
| RAYTHEON CO | RTX Corporation | 0.00 |
| SUPERCON INC | SUPERCON INC | 0.00 |
| GRANITE STATE CONCRETE CO INC WESTFORD | JG MACLELLAN CONCRETE CO INC | 0.00 |
| INTERVALA LLC | Intervala | 0.00 |
| CIRTRONICS CORP | CIRTRONICS CORP | 0.00 |
| JG MACLELLAN CONCRETE CO INC | JG MACLELLAN CONCRETE CO INC | 0.00 |
| KOCH SEPARATION SOLUTIONS INC. | Koch Industries | 0.00 |
| INDUSTRIAL POLYMERS & CHEMICAL S INC | INDUSTRIAL POLYMERS & CHEMICAL S INC | 0.00 |
| DAUPHINAIS CONCRETE INC. | DAUPHINAIS CONCRETE INC | 0.00 |
| ROLLS-ROYCE N.A. INC. | Rolls-Royce | 0.00 |
| PARKER HANNIFIN CORP CHOMERICS DIV | Parker-Hannifin | 0.00 |
| PLATING FOR ELECTRONICS INC. | PLATING FOR ELECTRONICS INC. | 0.00 |
| BIOSYNTH INTERNATIONAL INC. | KKR & Co. | 0.00 |
| DAUPHINAIS CONCRETE | DAUPHINAIS CONCRETE INC | 0.00 |
| HOLCIM - NER INC. | Holcim Group | 0.00 |
| THERMO FISHER SCIENTIFIC | Thermo Fisher Scientific | 0.00 |
| UNITED COUNTY INDUSTRIES | UNITED COUNTY INDUSTRIES | 0.00 |
| HOUGHTON CHEMICAL CORP | HOUGHTON CHEMICAL CORP | 0.00 |
| DAUPHINAIS CONCRETE INC. | DAUPHINAIS CONCRETE INC | 0.00 |
| CALLAHAN CHEMICAL CO LLC | SK Capital Partners | 0.00 |
| TOPCOAT | Standard Industries Inc. | 0.00 |
| RYMES - HUDSON | SUPERIOR PLUS CORP | 0.00 |
| SAINT GOBAIN PERFORMANCE PLASTICS | Saint-Gobain | 0.00 |
| RIVERDALE MILLS CORP | RIVERDALE MILLS CORP | 0.00 |
| SHAWSHEEN RUBBER CO INC | SHAWSHEEN RUBBER CO INC | 0.00 |
| SCULLY SIGNAL | SCULLY SIGNAL | 0.00 |
| E. PARRELLA CO. INC. | E. PARRELLA CO. INC. | 0.00 |
| TELEDYNE FLIR SURVEILLANCE | Teledyne Technologies | 0.00 |
| THERMO FISHER SCIENTIFIC | Thermo Fisher Scientific | 0.00 |
| MURPHYS WASTE OIL SERVICES INC | Clean Harbors Inc. | 0.00 |
| GVS N.A. | GVS Group | 0.00 |
| OLYMPIC ADHESIVES INC | OLYMPIC ADHESIVES INC | 0.00 |
| SAFETY-KLEEN SYSTEMS MARLBOROUGH (MRB) | Clean Harbors Inc. | 0.00 |
| AOTCO METAL FINISHING LLC | AOTCO METAL FINISHING LLC | 0.00 |
| BROX INDUSTRIES INC | Brox Industries | 0.00 |
| OLDCASTLE APG NEW ENGLAND | CRH PLC | 0.00 |
| RESILIENCE BOSTON INC. | NATIONAL RESILIENCE INC | 0.00 |
| NEW METHOD PLATING CO.,INC. | NEW METHOD PLATING CO.,INC. | 0.00 |
| ANIKA THERAPEUTICS | Anika Therapeutics | 0.00 |
| CYTIVA | Danaher | 0.00 |
| SARTORIUS STEDIM 450 DLB | SARTORIUS STEDIM BIOTECH | 0.00 |
| SKYWORKS SOLUTIONS INC | Skyworks Solutions | 0.00 |
| CURIA MASSACHUSETTS INC. | Aledade | 0.00 |
| MACOM TECHNOLOGY SOLUTIONS INC | M/A-COM TECHNOLOGY SOLUTIONS HOLDINGS | 0.00 |
| CL HAUTHAWAY & SONS CORP | CL HAUTHAWAY & SONS CORP | 0.00 |
