| | LPA.L | LPA Group PLC | LSE |
| | LPLA | LPL Financial Holdings Inc. | NASD |
| | GNSS | LRAD Corp. | NASD |
| | LSOFX | LS Opportunity Fund | USMF |
| | LXU | LSB Industries | NYSE |
| | LKSDQ | LSC Communications, Inc. | PINK |
| | $LSAD | LSE - Advance-Decline Issues | LSE |
| | $LOAD | LSE - Advance-Decline Issues (EOD) | LSE |
| | $LSUD | LSE - Advance-Decline Volume | LSE |
| | $LSADV | LSE - Issues Advancing | LSE |
| | $LOADV | LSE - Issues Advancing (EOD) | LSE |
| | $LSDEC | LSE - Issues Declining | LSE |
| | $LODEC | LSE - Issues Declining (EOD) | LSE |
| | $LSADU | LSE - Issues Unchanged | LSE |
| | $LOADU | LSE - Issues Unchanged (EOD) | LSE |
| | $LSHGH | LSE - New Highs | LSE |
| | $LSHL | LSE - New Highs-New Lows | LSE |
| | $LSLOW | LSE - New Lows | LSE |
| | $LSTOT | LSE - Total Active Symbols | LSE |
| | $LOTOT | LSE - Total Active Symbols (EOD) | LSE |
| | $LSTV | LSE - Total Volume | LSE |
| | $LSUPV | LSE - Volume Advancing | LSE |
| | $LSDNV | LSE - Volume Declining | LSE |
| | $LSUDU | LSE - Volume Unchanged | LSE |
| | LYTS | LSI Industries, Inc. | NASD |
| | LSL.L | LSL Property Services | LSE |
| | LSVEX | LSV Value Equity Fund | USMF |
| | DAAWAT.IN | LT Foods Ltd. | NSE |
| | LTC | LTC Properties, Inc. | NYSE |
| | LUB | Lubys, Inc. | NYSE |
| | LUC.TO | Lucara Diamond Corp. | TSE |
| | LUCRF | Lucara Diamond Corp. | PINK |
| | LUCE.L | Luceco Plc | LSE |
| | LCDX | Lucid Inc. | PINK |
| | LHDX | Lucira Health Inc. | NASD |
| | LKNCY | Luckin Coffee Inc. | PINK |
| | LU | Lufax Holding Ltd. | NYSE |
| | LULU | Lululemon Athletica Inc. | NASD |
| | LUMAXTECH.IN | Lumax Auto Technologies Ltd. | NSE |
| | LUMAXIND.IN | Lumax Industries Ltd. | NSE |
| | $LUMBER | Lumber - Continuous Contract (EOD) | CME |
| | ^LBF21 | Lumber - Jan 2021 (EOD) | CME |
| | ^LBN21 | Lumber - Jul 2021 (EOD) | CME |
| | ^LBH21 | Lumber - Mar 2021 (EOD) | CME |
| | ^LBK21 | Lumber - May 2021 (EOD) | CME |
| | ^LBX21 | Lumber - Nov 2021 (EOD) | CME |
| | ^LBU21 | Lumber - Sep 2021 (EOD) | CME |
| | LL | Lumber Liquidators Holdings, Inc. | NYSE |
| | LUMN | Lumen Technologies Inc | NYSE |
| | LFT | Lument Finance Trust, Inc. | NYSE |
| | LITE | Lumentum Holdings Inc. | NASD |
| | LMGDF | Lumina Gold Corp. | PINK |
| | LUM.V | Lumina Gold Corp. | TSXV |
| | LAZR | Luminar Technologies, Inc. | NASD |
| | LMNX | Luminex Corp. | NASD |
| | LR.V | Luminex Resources Corp. | TSXV |
| | LUMO | Lumos Pharma, Inc. | NASD |
| | LUNA | Luna Innovations Inc. | NASD |
| | FTMNF | Lundin Gold Inc. | PINK |
| | LUG.TO | Lundin Gold Inc. | TSE |
| | LUN.TO | Lundin Mining Corp. | TSE |
| | LUNMF | Lundin Mining Corp. | PINK |
| | LKCO | Luokung Technology Corp. | NASD |
| | LUPIN.IN | Lupin Ltd. | NSE |
| | LBC | Luther Burbank Corp. | NASD |
| | LUXA | Lux Health Tech Acquisition Corp. | NASD |
| | LUXAU | Lux Health Tech Acquisition Corp. | NASD |
| | LUXIND.IN | LUX Industries Ltd. | NSE |
| | LXFR | Luxfer Holdings plc | NYSE |
| | LVMUY | LVMH Moet Hennessy Louis Vuitton | PINK |
| | DFCFX | LWAS/DFA Two-Year Corporate Fixed Income Portfolio | USMF |
| | DFYGX | LWAS/DFA Two-Year Government Portfolio | USMF |
| | LXI.L | LXI REIT Plc | LSE |
| | LDL | Lydall, Inc. | NYSE |
| | LYFT | Lyft Inc. | NASD |
| | LYKALABS.IN | Lyka Labs Ltd. | NSE |
| | LYSDY | Lynas Corp. Ltd. | PINK |
| | LYSCF | Lynas Corporation Ltd. | PINK |
| | LYB | LyondellBasell Industries NV | NYSE |
| | LYPSAGEMS.IN | Lypsa Gems & Jewellery Ltd. | NSE |
| | LYRA | Lyra Therapeutics | NASD |
| | LYRBX | Lyrical US Value Equity Fund | USMF |
| | LYRIX | Lyrical US Value Equity Fund | USMF |
| | PR.TO | Lysander-Slater Preferred Share ActivETF | TSE |
| | CRBL.L | Lyxor Commodities Thomson Reuters/CoreCommodity CRB TR UCITS ETF | LSE |
| | L100.L | Lyxor FTSE 100 UCITS ETF | LSE |