| ABV | Companhia de Bebidas Das Americas (AMBEV) | 42.52 | Stock | | NYQ |
| AMBC | Ambac Financial Group, Inc. | 27.16 | Stock | | NMS |
| AMBA | Ambarella, Inc. | 16.79 | Stock | Semiconductor Equipment & Materials | NMS |
| AMBT | Ambient Corporation | 1.93 | Stock | Communication Equipment | NCM |
| AMBO | Ambow Education Holding Ltd. | 0.95 | Stock | Education & Training Services | NYQ |
| AMBI | Ambit Biosciences Corporation | 6.86 | Stock | Biotechnology | NGM |
| EPAX | Ambassadors Group Inc. | 3.62 | Stock | Education & Training Services | NMS |
| AMBS | Amarantus BioScience, Inc. | 0.04 | Stock | Biotechnology | PNK |
| AMBCW | Ambac Financial Group, Inc. | 14.77 | Stock | | NMS |
| AMBK | American Bank Incorporated | 7.25 | Stock | Regional - Northeast Banks | PNK |
| ABCP | AmBase Corp. | 1.18 | Stock | Property Management | PNK |
| ^AMBEURT | A.M. Best's European Insurance | 1,323.38 | Index | | DJI |
| SLR.MC | Solaria Energia y Medio Ambiente, S.A. | 0.63 | Stock | | MCE |
| AMO.AX | Ambertech Limited | 0.26 | Stock | Computers Wholesale | ASX |
| AMIEQ | Ambassadors International Inc. | 0.01 | Stock | | PNK |
| AMFC | AMB Financial Corp. | 9.50 | Stock | Savings & Loans | OBB |
| AMBZ | American Business Bank | 29.00 | Stock | Regional - Pacific Banks | OBB |
| AMBV4.SA | Companhia de Bebidas Das Americas (AMBEV) | 86.75 | Stock | Beverages - Brewers | SAO |
| AMBV3.SA | Companhia de Bebidas Das Americas (AMBEV) | 85.90 | Stock | Beverages - Brewers | SAO |
| AMBEX | ASTON/Anchor Capital Enhanced Equity N | 9.24 | Mutual Fund | | NAS |