| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
| Symbol | Company Name |
| Y | Alleghany Corp |
| YBTVA | YOUNG BROADCASTING INC |
| YDNT | Young Innovations Inc |
| YGE | Yingli Green Energy Holding Co Ltd |
| YHOO | Yahoo! Inc |
| YMI | YM BIOSCIENCES INC |
| YORW | York Water Co |
| YPF | YPF Sociedad Anonima ADR Each Representing One Class D Ord S |
| YRCW | YRC Worldwide Inc |
| YSI | U-Store-It Trust |
| YTEC | Yucheng Technologies Ord Shs |
| YUM | YUM! BRANDS INC |
| YZC | Yanzhou Coal Mining Level III ADR |