| Z split history Zillow Inc | NASDAQ | Financials |
| ZA split history Zuoan Fashion Ltd (ADR) | NYSE | Cyclical Consumer Goods & Services |
| ZAGG split history Zagg Inc | NASDAQ | Cyclical Consumer Goods & Services |
| ZANE split history Zanett, Inc. | NASDAQ | Technology |
| ZAYO split history Zayo Group Holdings Inc | NYSE | Telecommunications Services |
| ZAZA split history ZaZa Energy Corp | NASDAQ | Energy |
| ZBB split history ZBB Energy Corporation | NYSEMKT | Industrials |
| ZBRA split history Zebra Technologies Corp. | NASDAQ | Technology |
| ZEN split history Zendesk Inc | NYSE | Technology |
| ZEP split history Zep, Inc. | NYSE | Non-Cyclical Consumer Goods & Services |
| ZEUS split history Olympic Steel, Inc. | NASDAQ | Basic Materials |
| ZF split history The Zweig Fund, Inc. | NYSE | Financials |
| ZFC split history ZAIS Financial Corp | NYSE | Financials |
| ZFGN split history Zafgen Inc | NASDAQ | Healthcare |
| ZGEN split history ZymoGenetics, Inc. | NASDAQ | Healthcare |
| ZGNX split history Zogenix, Inc. | NASDAQ | Healthcare |
| ZHNE split history Zhone Technologies Inc | NASDAQ | Technology |
| ZIGO split history Zygo Corporation | NASDAQ | Healthcare |
| ZINC split history HORSEHEAD HOLDING CORP. | NASDAQ | Basic Materials |
| ZION split history Zions Bancorporation | NASDAQ | Financials |
| ZIOP split history ZIOPHARM Oncology Inc. | NASDAQ | Healthcare |
| ZIPR split history ZipRealty, Inc. | NASDAQ | Financials |
| ZIXI split history Zix Corporation | NASDAQ | Technology |
| ZLC split history Zale Corporation | NYSE | Services |
| ZLCS split history Zalicus Inc | NASDAQ | Healthcare |
| ZLTQ split history Zeltiq Aesthetics Inc | NASDAQ | Healthcare |
| ZMH split history Zimmer Holdings, Inc. | NYSE | Healthcare |
| ZN split history Zion Oil & Gas, Inc. | NASDAQ | Energy |
| ZNGA split history Zynga Inc | NASDAQ | Technology |
| ZNH split history China Southern Airlines Co Ltd (ADR) | NYSE | Industrials |
| ZOES split history Zoe's Kitchen Inc | NYSE | Cyclical Consumer Goods & Services |
| ZOLL split history ZOLL Medical Corporation | NASDAQ | Healthcare |
| ZOLT split history Zoltek Companies, Inc. | NASDAQ | Technology |
| ZOOM split history Zoom Technologies, Inc. | NASDAQ | Technology |
| ZPIN split history Zhaopin Ltd (ADR) | NYSE | Industrials |
| ZQK split history Quiksilver, Inc. | NYSE | Cyclical Consumer Goods & Services |
| ZRAN split history Zoran Corporation | NASDAQ | Technology |
| ZSPH split history ZS Pharma Inc | NASDAQ | Healthcare |
| ZTR split history The Zweig Total Return Fund, Inc. | NYSE | Financials |
| ZTS split history Zoetis Inc | NYSE | Healthcare |
| ZU split history Zulily Inc | NASDAQ | Cyclical Consumer Goods & Services |
| ZUMZ split history Zumiez Inc. | NASDAQ | Cyclical Consumer Goods & Services |
| ZX split history China Zenix Auto International Ltd | NYSE | Cyclical Consumer Goods & Services |
| ZZ split history Sealy Corporation | NYSE | Cyclical Consumer Goods & Services |