| Q split history Qwest Communications International Inc. | NYSE | Services |
| QABA split history First Trust NASDAQ ABA Comm Bnk Indx Fnd | NASDAQ | Financials |
| QADA split history QAD Inc. | NASDAQ | Technology |
| QADB split history QAD Inc. | NASDAQ | Technology |
| QADI split history QAD Inc. | NASDAQ | Technology |
| QBAK split history Qualstar Corporation | NASDAQ | Technology |
| QBC split history Cubic Energy, Inc. | NYSEAMEX | Energy |
| QCC split history Quest Capital Corp. (USA) | AMEX | Financials |
| QCCO split history QC Holdings, Inc. | NASDAQ | Financials |
| QCLN split history First Trust NASDAQ Clean Edge US (ETF) | NASDAQ | Financials |
| QCOM split history QUALCOMM, Inc. | NASDAQ | Technology |
| QCOR split history Questcor Pharmaceuticals Inc | NASDAQ | Healthcare |
| QCRH split history QCR Holdings, Inc. | NASDAQ | Financials |
| QDEL split history Quidel Corporation | NASDAQ | Healthcare |
| QEP split history QEP Resources Inc | NYSE | Energy |
| QEPM split history QEP Midstream Partners LP | NYSE | Energy |
| QGEN split history Qiagen NV | NASDAQ | Healthcare |
| QIHU split history Qihoo 360 Technology Co Ltd | NYSE | Technology |
| QIWI split history Qiwi PLC | NASDAQ | Industrials |
| QKLS split history QKL Stores Inc | NASDAQ | Cyclical Consumer Goods & Services |
| QLGC split history QLogic Corporation | NASDAQ | Technology |
| QLIK split history Qlik Technologies Inc | NASDAQ | Technology |
| QLTI split history QLT Inc. (USA) | NASDAQ | Healthcare |
| QLTY split history Quality Distribution Inc | NASDAQ | Industrials |
| QLYS split history Qualys Inc | NASDAQ | Technology |
| QNST split history QuinStreet Inc | NASDAQ | Cyclical Consumer Goods & Services |
| QPACU split history Jason Industries Inc | NASDAQ | Industrials |
| QQEW split history First Trust NASDAQ-100 EqualWeighted ETF | NASDAQ | Financials |
| QQQ split history PowerShares QQQ Trust, Series 1 (ETF) | NASDAQ | Financials |
| QQQX split history NASDAQ Premium Income & Growth Fund Inc. | NASDAQ | Financials |
| QQXT split history First Trust NASDAQ-100 Ex-Tech Sec (ETF) | NASDAQ | Financials |
| QRE split history QR Energy LP | NYSE | Energy |
| QRHC split history Quest Resource Holding Corp | NASDAQ | Industrials |
| QSFT split history Quest Software, Inc. | NASDAQ | Technology |
| QSII split history Quality Systems, Inc. | NASDAQ | Technology |
| QTEC split history First Trust NASDAQ-100- Technology Ix Fd | NASDAQ | Financials |
| QTETU split history Quartet Merger Corp | NASDAQ | Financials |
| QTM split history Quantum Corp | NYSE | Technology |
| QTNT split history Quotient Ltd | NASDAQ | Healthcare |
| QTS split history QTS Realty Trust Inc | NYSE | Financials |
| QTWO split history Q2 Holdings Inc | NYSE | Technology |
| QTWW split history Quantum Fuel Systems Tech Worldwide Inc | NASDAQ | Cyclical Consumer Goods & Services |
| QUAD split history Quad/Graphics, Inc. | NYSE | Industrials |
| QUIK split history QuickLogic Corporation | NASDAQ | Technology |
| QUMU split history Qumu Corp | NASDAQ | Technology |
| QUNR split history Qunar Cayman Islands Ltd | NASDAQ | Technology |
| QUOT split history Life Quotes Inc | NASDAQ | Financials |
| QURE split history Uniqure NV | NASDAQ | Healthcare |
| QVCA split history Liberty Interactive Corp | NASDAQ | Cyclical Consumer Goods & Services |
| QVCB split history Liberty Interactive Corp | NASDAQ | Cyclical Consumer Goods & Services |
| QXM split history Qiao Xing Mobile Communication Co., Ltd. | NYSE | Technology |