| QAD Inc. | 1 | www.qad.com | UNITED STATES |
| Qass.net GmbH | 1 | www.qass.net | UNKNOWN |
| QASymphony | 1 | www.qasymphony.com/ | UNITED STATES |
| qBittorrent | 1 | www.qbittorrent.org/ | FRANCE |
| QCoherent Software LLC | 1 | www.qcoherent.com/index.html | UNITED STATES |
| Q-DAS GmbH | 2 | www.q-das.de | GERMANY |
| QDesign Corporation | 2 | www.qdesign.com | CANADA |
| QGroundControl.org | 1 | www.qgroundcontrol.org/ | SWITZERLAND |
| Qiagen Benelux B.V. | 2 | www.qiagen.com | NETHERLANDS |
| Qihoo 360 | 1 | www.360totalsecurity.com/ | CHINA |
| QImaging | 1 | https://www.qimaging.com/ | CANADA |
| Qlik Technologies Inc. | 4 | https://www.qlik.com | UNITED STATES |
| Qliner Software | 1 | www.qliner.com/ | UNITED STATES |
| QLogic | 5 | www.qlogic.com | UNITED STATES |
| QNAP Security | 5 | | TAIWAN, PROVINCE OF CHINA |
| QO Labs | 1 | www.qolabs.com/contact.html#feed | UNKNOWN |
| QPC Software | 1 | | UNITED STATES |
| QS/1 | 7 | www.qs1.com/#/ | UNITED STATES |
| QSR Automations Inc. | 1 | https://qsrautomations.com | UNITED STATES |
| QSR International Pty Ltd | 3 | www.qsr.com.au | AUSTRALIA |
| Quadralay Corp. | 3 | www.webworks.com | UNITED STATES |
| QuadraMed Corporation | 3 | www.quadramed.com/ | UNITED STATES |
| Quadrant Systems LLC | 1 | www.quadrant-systems.com/rasinformation.html | UNITED STATES |
| Qualcomm Atheros | 2 | www.qca.qualcomm.com | UNITED STATES |
| Qualcomm Incorporated | 13 | www.qualcomm.com | UNITED STATES |
| Qualigram | 1 | https://www.pyx4.com | FRANCE |
| Qualitas Inc. | 3 | www.qualitas.com | UNITED STATES |
| Quality Software Components | 1 | | UNITED KINGDOM |
| Quality Vision International | 1 | https://www.ramoptical.com | UNITED STATES |
| Qualys Inc. | 1 | https://www.qualys.com | UNITED STATES |
| Quanta Press Inc. | 1 | | UNITED STATES |
| Quantachrome Instruments | 2 | www.quantachrome.com | UNITED STATES |
| Quantapoint | 2 | www.quantapoint.com/qp/contact/ | UNITED STATES |
| Quanterion Solutions Incorporated | 2 | quanterion.com/Index.asp | UNITED STATES |
| Quantitative Micro Software | 1 | | UNITED STATES |
| Quantrix | 1 | www.quantrix.com/index.php | UNITED STATES |
| Quantum Corporation | 4 | www.quantum.com | UNITED STATES |
| Quantum Software Corporation | 1 | www.quantumleapit.com/default.aspx | UNITED STATES |
| Quark Inc. | 3 | www.quark.com | UNITED STATES |
| Quartz Imaging Corporation | 1 | www.qrtz.com/ | CANADA |
| Quercus Systems | 1 | www.quercus-sys.com | UNITED STATES |
| Quest Diagnostics | 2 | questdiagnostics.com | UNITED STATES |
| Quest Software Inc. | 59 | www.quest.com | UNITED STATES |
| Quester Tangent Corporation | 2 | www.questertangent.com/ | CANADA |
| Questionmark | 1 | www.questionmark.com/us/Pages/default.aspx | UNITED KINGDOM |
| QuestStar Medical Inc. | 1 | www.queststarmedical.com | UNITED STATES |
| QueTek Consulting Corporation | 1 | | UNITED STATES |
| Quick And Easy Software | 1 | https://quickandeasysoftware.net | UNKNOWN |
| Quick Desktop Computing | 8 | | UNITED STATES |
| Quick Technologies Inc. | 1 | sageworld.com/ | UNITED STATES |
| QuickSFV | 1 | quicksfv.org | UNKNOWN |
| Quicksilva Ltd. | 1 | www.quicksilva.co.uk | UNITED KINGDOM |
| Quicksoft Inc. | 1 | | UNITED STATES |
| Quiksoft Corporation | 1 | https://www.quiksoft.com | UNITED STATES |
| Quinnware | 2 | www.quinnware.com | CANADA |
| Quixote Transportation Technologies Inc. | 1 | www.qttinc.com | UNITED STATES |
| QUMAS | 2 | www.qumas.com/ | UNITED STATES |
| QuoteTracker | 1 | www.quotetracker.com/contact.shtml | UNKNOWN |
| Quotient Technology Inc. | 1 | https://www.quotient.com | UNITED STATES |
| Quovadx Inc. | 2 | www.quovadx.com/ | UNITED STATES |
| Qurb Inc. | 1 | | UNITED STATES |
| QwikQuote Development Corporation | 1 | www.qwikquote.com | UNITED STATES |
| Qwizdom | 2 | www.qwizdom.com | UNITED STATES |
