| M&S Technologies IL | Wholesale Trade | 0 | — | A |
| M&S TRANSIT, INC. NC | Transportation & Warehousing | 0 | — | F |
| M&T Bank NY | Finance & Insurance | 59 | $126,927 | — |
| M&T Bank (Long Island) NY | — | 0 | — | — |
| M&T Bank (Mid-Hudson) NY | — | 0 | — | — |
| M&T Bank (NYC) NY | — | 0 | — | — |
| M&T Bank (Staten Island) NY | — | 0 | — | — |
| M&T Enterprises UT | Construction | 0 | — | F |
| M&TSG CO | Professional & Technical Services | 0 | — | F |
| M&TSG GA | Information & Media | 0 | — | A |
| M&TSG IL | Information & Media | 0 | — | A |
| M&TSG MD | Information & Media | 0 | — | A |
| M&TSG TX | Manufacturing | 0 | — | A |
| M&TSG VA | Information & Media | 0 | — | A |
| M&V Buyer LLC NY | Wholesale Trade | 0 | — | A |
| M&W Contractors Inc IL | Construction | 0 | — | A |
| M&W ELECTRIC INC. OR | Construction | 0 | — | C |
| M&W Hydraulics IA | Manufacturing | 0 | — | A |
| M&W Precast LLC PA | Manufacturing | 0 | — | F |
| M&W Transportation CO., Inc. IN | Transportation & Warehousing | 0 | — | B |
| M&W Transportation CO., Inc. TN | Transportation & Warehousing | 0 | — | B |
| M&X Utility Company, Inc. MA | Construction | 0 | — | F |
| M'Shoogy Animal Rescue MO | Professional & Technical Services | 1 | $110,000 | — |
| M'Shoogy's Animal Rescue MO | Professional & Technical Services | 1 | $110,000 | — |
| M-1 Merchant Services Inc. CA | Finance & Insurance | 1 | $74,880 | — |
| M-1 Tool Works IL | Manufacturing | 0 | — | A |
| M-B Companies, Inc. WI | Manufacturing | 1 | $135,000 | — |
| M-B-W, INC. WI | Manufacturing | 0 | — | F |
| M-C Fabrication, Inc KS | Manufacturing | 0 | — | F |
| M-Communications LLC GA | Construction | 0 | — | D |
| M-D Building Products GA | Manufacturing | 0 | — | F |
| M-D Building products IN | Manufacturing | 0 | — | A |
| M-D Building Products KY | Manufacturing | 0 | — | F |
| M-D building products MO | Manufacturing | 0 | — | A |
| M-D Building Products OK | Manufacturing | 0 | — | F |
| M-L Masonry, Inc. ID | Construction | 0 | — | F |
| M-M Masonry, LLC OH | Construction | 0 | — | F |
| M-Mig Construction Inc. CA | Construction | 0 | — | F |
| M-S Cash Drawer Corporation CA | Wholesale Trade | 0 | — | A |
| M-S Logistics, LLC TN | Transportation & Warehousing | 0 | — | A |
| M-Tech TX | Construction | 0 | — | A |
| M-Tech Electric LLC TX | Construction | 0 | — | A |
| M. A. Mortenson Company MN | Construction | 23 | $114,980 | — |
| M. Argueso & Co. Inc dba Paramelt OH | — | 0 | — | — |
| M. Arthur Gensler Jr. & Associates Inc. dba Gensler CA | — | 0 | — | — |
| M. Arthur Gensler Jr. & Associates, Inc. CA | Professional & Technical Services | 25 | $93,094 | — |
| M. Arthur Gensler Jr. & Associates, Inc. a California Corporation CA | — | 0 | — | — |
| M. Arthur Gensler Jr. & Associates, Inc. dba Gensler CA | — | 0 | — | — |
| M. B. Kahn Construction Co. Inc. FL | Construction | 0 | — | A |
| M. B. Kahn Construction Co. Inc. GA | Construction | 0 | — | F |
