| 601 | TRANSELECTRIC ENERGY-SYSTEMS PRIVATE LIMITED - U40102WB2012PTC183551 |
| 602 | TRANSIENT ELECTRICALS PRIVATE LIMITED - U40300WB2014PTC203694 |
| 603 | TRICKSHOT SOLUTIONS PRIVATE LIMITED - U40300WB2017PTC221932 |
| 604 | TRUWORTH CONTROL SYSTEM PVT. LTD. - U40101WB1994PTC066356 |
| 605 | UC ENGINEERING INDUSTRIES PVT LTD - U40102WB1990PTC049755 |
| 606 | UD TECH SOLUTIONS PRIVATE LIMITED - U40200WB2008PTC126218 |
| 607 | ULTIMAX GENPOWER SOLUTIONS PRIVATE LIMIT ED - U40102WB2010PTC152951 |
| 608 | ULTIMAX POWER SOLUTIONS PRIVATE LIMITED - U40300WB2009PTC132583 |
| 609 | ULTRASHAKTI INDUSTRIES LIMITED - U40106WB2010PLC153010 |
| 610 | UNICORN PROJECTS PRIVATE LIMITED - U40105WB2003PTC097128 |
| 611 | UNION PLASTOTECH PVT LTD - U40107WB1996PTC079119 |
| 612 | UNIQUE NON CONVENTIONAL RURAL ENERGY PROJECTS LIMITED - U40108WB2008PLC126717 |
| 613 | UNIQUE POWER SOLUTION PRIVATE LIMITED - U40300WB2014PTC204342 |
| 614 | UNISOURCE ENERGY SERVICES PRIVATE LIMITED - U40300WB2012PTC188267 |
| 615 | UNISOURCE TECHNICAL SERVICES PRIVATE LIMITED - U40101WB2011PTC170841 |
| 616 | UNITED UNCONVENTIONAL ENERGY PRIVATE LIMITED - U40100WB2011PTC170285 |
| 617 | UNIVERSAL CRESCENT POWER PRIVATE LIMITED - U40102WB2008PTC131018 |
| 618 | UNIVERSAL EAST COASTAL POWER LIMITED - U40105WB2008PLC130999 |
| 619 | UNIVERSAL WEST COAST POWER PRIVATE LIMITED - U40105WB2008PTC131000 |
| 620 | UPPER GANGES VALLEY ELECTRICITY SUPPLY C O LTD - U40109WB1929PLC006465 |
| 621 | UPPER JUMNA VALLEY ELECTRICITY SUPPLY CO LTD - U40109WB1925PLC006464 |
| 622 | URJASVALA ENERGY PRIVATE LIMITED - U40101WB2016PTC209650 |
| 623 | URJASVALA GREEN ENERGY PRIVATE LIMITED - U40300WB2016PTC217584 |
| 624 | USHA MARTIN HOLDINGS LIMITED - U40102WB1997PLC084410 |
| 625 | USHA TECHNO POWER PRIVATE LIMITED - U40105WB2009PTC136075 |