- SD — SandRidge Energy, Inc.
- SDA — SunCar Technology Group Inc.
- SDAD — SH Resources & Development Corp.
- SDAY.NE — Hamilton Enhanced U.S. Equity Daymax ETF
- SDCCQ — SmileDirectClub, Inc.
- SDCH — SideChannel, Inc.
- SDCI — USCF SummerHaven Dynamic Commodity Strategy No K-1 Fund
- SDCP — Virtus Newfleet Short Duration Core Plus Bond ETF
- SDCVF — Vicat S.A.
- SDD — ProShares - UltraShort SmallCap600
- SDE.TO — Spartan Delta Corp.
- SDEC — Smart Decision, Inc.
- SDEM — Global X - MSCI SuperDividend Emerging Markets ETF
- SDEV — Stablecoin Development Corp.
- SDF.AX — Steadfast Group Limited
- SDFI — Alliance BernsteinAB Short Duration Income ETF
- SDG — iShares MSCI Global Sustainable Development Goals ETF
- SDGCF — Sundrug Co.,Ltd.
- SDGR — Schrödinger, Inc.
- SDHC — Smith Douglas Homes Corp.
- SDHI — Siddhi Acquisition Corp
- SDHIR — Siddhi Acquisition Corp.
- SDHIU — Siddhi Acquisition Corp Unit
- SDI.V — Stampede Drilling Inc.
- SDIIF — SDI Group plc
- SDIPF — Frasers Group plc
- SDIV — Global X - SuperDividend ETF
- SDMF — Simplify DBi CTA Managed Futures Index ETF
- SDMHF — Sartorius Stedim Biotech S.A.
- SDNI — Scandia, Inc.
- SDOG — ALPS Sector Dividend Dogs ETF
- SDON — Sandston Corporation
- SDOT — Sadot Group Inc.
- SDOW — ProShares - UltraPro Short Dow30
- SDP — ProShares - UltraShort Utilities
- SDPNF — Sime Darby Plantation Berhad
- SDR.AX — Siteminder Limited
- SDRC — Sidney Resources Corp.
- SDRL — Seadrill Limited
- SDS — ProShares - UltraShort S&P500
- SDSI — American Century Short Duration Strategic Income ETFAmerican Century Short Duration Strategic Income ETFAmerican Century Short Duration Strategic Income ETF
- SDSS — Suspect Detection Systems Inc.
- SDST — Stardust Power Inc.
- SDSTW — Stardust Power Inc.
- SDSYA — South Dakota Soybean Processors, LLC
- SDTHF — Sdiptech AB (publ)
- SDTY — YieldMax S&P 500 0DTE Covered Call Strategy ETF
- SDUR — PIMCO Short Duration Active ETF
- SDURF — Stroud Resources Ltd.
- SDV.AX — SciDev Ltd
- SDVD.NE — FIRST TRUST VEST SMID RISING DIVIDEND ACHIEVERS TARGET INCOME ETF
- SDVI — Signature Devices, Inc.
- SDVKF — Sandvik AB (publ)
- SDVKY — Sandvik AB (publ)
- SDVY — First Trust SMID Cap Rising Dividend Achievers ETF
- SDVY-F.NE — FIRST TRUST SMID CAP RISING DIVIDEND ACHIEVERS ETF - HEDGED UNITS
- SDVY.NE — FIRST TRUST SMID CAP RISING DIVIDEND ACHIEVERS ETF - UNITS
- SDWHF — Soundwill Holdings Limited
- SDXAY — Sodexo S.A.
- SDXEF — SDX Energy plc
- SDXOF — Sodexo S.A.
- SDY — State Street SPDR S&P Dividend ETF
- SDZNY — Sandoz Group AG
- SE — Sea Limited
- SEA — U.S. Global Sea to Sky Cargo ETF
- SEA.TO — Seabridge Gold Inc.
- SEAC — SeaChange International, Inc.
- SEAOF — SeaCo Ltd.
- SEAT — Vivid Seats Inc.
- SEATW — Vivid Seats Inc.
- SEAV — SEATech Ventures Corp.
- SEB — Seaboard Corporation
- SEBC — Southeastern Banking Corporation
- SEBNF — Seven Bank, Ltd.
- SEBYF — SEB S.A.
- SEBYY — SEB S.A.
- SEC.TO — Senvest Capital Inc.
- SECCF — Serco Group plc
- SECI — Sector 10, Inc.
- SECOY — Secoo Holding Limited
- SECR — NYLI MacKay Securitized Income ETF
- SECT — Main Sector Rotation ETF
- SECU — iShares Securitized Income Active ETF
- SECVY — Séché Environnement S.A.
- SECYF — Secure Waste Infrastructure Corp.
- SECZ — Securitize Corp.
- SEDG — SolarEdge Technologies, Inc.
- SEDN — SED International Holdings, Inc.
- SEED — Origin Agritech Limited
- SEEK — TheDirectory.com, Inc
- SEEMF — Seeing Machines Limited
- SEER — Seer, Inc.
- SEF — ProShares - Short Financials
- SEG — Seaport Entertainment Group Inc.
- SEG.AX — Sports Entertainment Group Limited
- SEGG — Lottery.com Inc.
- SEGI — Sycamore Entertainment Group, Inc.
- SEGSF — SIA Engineering Company Limited
- SEGXF — SEGRO Plc
- SEGYY — SPT Energy Group Inc.
