| 1926 | M K RASAYAN PRIVATE LIMITED - U24117WB1999PTC089302 |
| 1927 | M M S ELECTRO CHEMICALS PVT LTD - U24249WB1979PTC032297 |
| 1928 | M N SEN & CO PVT LTD - U24139WB1974PTC029748 |
| 1929 | M P SARAFF ENTERPRISES PRIVATE LIMITED - U24119WB1997PTC084847 |
| 1930 | M PRABHA PIGCHEMS PVT LTD - U24229WB1988PTC044917 |
| 1931 | M S CORPORATION PRIVATE LIMITED - U24116WB1998PTC086280 |
| 1932 | M S MEDICINE HOUSE PRIVATE LIMITED - U24100WB2012PTC180636 |
| 1933 | M. BHATTACHARYYA LABORATORIES PVT. LTD. - U24234WB1992PTC056776 |
| 1934 | M. M AYURVEDIC PRIVATE LIMITED - U24233WB2006PTC109693 |
| 1935 | M. M. BIOTECH CO. PRIVATE LIMITED - U24233WB2007PTC118682 |
| 1936 | M.A.K. (INDIA) CHEMICALS PRIVATE LIMITED - U24111WB1995PTC151742 |
| 1937 | M.C.VINIMAY PRIVATE LIMITED - U24121WB1999PTC089115 |
| 1938 | M.D. FOOD PROCESSING PVT. LTD. - U24119WB1989PTC047246 |
| 1939 | M.RUDRA & COMPANY PVT. LTD. - U24121WB1986PTC040921 |
| 1940 | M.S LIFE DRUG HOUSE PRIVATE LIMITED - U24231WB2000PTC092372 |
| 1941 | MA SHAKAMBARI CHEMICALS PRIVATE LIMITED - U24299WB1997PTC085492 |
| 1942 | MAA KAMLESHWARI CHEMICALS LTD - U24121WB2006PLC108969 |
| 1943 | MAA MANOSA ENTERPRISE PRIVATE LIMITED - U24304WB2018PTC225118 |
| 1944 | MAA MEDICAL AIDS AND APPARELS PVT.LTD. - U24232WB1991PTC052052 |
| 1945 | MAA MENOKA CHEMICALS PRIVATE LIMITED - U24299WB2005PTC101875 |
| 1946 | MAAHESHVARI CHEMICAL PRIVATE LIMITED - U24100WB2013PTC197754 |
| 1947 | MAAMONI CINEMA PVT LTD - U24294WB1991PTC051942 |
| 1948 | MACCOIL CHEMICALS PVT LTD - U24299WB1987PTC041906 |
| 1949 | MACKENZIE PHARMACEUTICALS PRIVATE LIMITED - U24240WB2012PTC183671 |
| 1950 | MACMIXU COATING AND CHEMICALS PRIVATE LIMITED - U24100WB2015PTC205934 |