| S32South32 Ltd | Basic Materials | 225.40 p | −0.97% |
| SAEMiShares MSCI EM IMI ESG Screened UCITS ETF USD (Acc) | — | 9.73 $ | −2.07% |
| SAFESafestore Holdings Plc | Real Estate | 552.00 p | 0.00% |
| SAGASaga plc | Consumer Cyclical | 875.00 p | −2.56% |
| SAGGiShares Global Aggregate Bond UCITS Dist | — | 3.18 £ | −0.26% |
| SAINScottish American Investment Co | Financial Services | 554.00 p | −0.54% |
| SASUiShares MSCI USA ESG Screened UCITS ETF USD (Acc) | — | 15.75 $ | −1.77% |
| SAVSavannah Resources Plc | Basic Materials | 4.70 p | −2.08% |
| SAVESavannah Energy PLC | Energy | 5.51 p | 0.00% |
| SAWDiShares MSCI World ESG Screened UCITS ETF USD (Acc) | — | 13.53 $ | −1.61% |
| SBARSundae Bar Plc | Technology | 4.25 p | 0.00% |
| SBRESabre Insurance Group PLC | Financial Services | 172.20 p | 0.58% |
| SBRYJ Sainsbury PLC | Consumer Defensive | 345.40 p | 2.13% |
| SCGLSealand Capital Galaxy Ltd | Consumer Cyclical | 0.37 p | −1.33% |
| SCLPScancell Hldgs Plc | Healthcare | 87.40 p | −1.80% |
| SCTSoftcat plc | Technology | 1,631.00 p | −3.55% |
| SDHAiShares $ Short Duration High Yield Corp Bond UCITS USD Acc | — | 7.23 $ | 0.06% |
| SDIAiShares $ Short Duration Corp Bond UCITS Acc | — | 6.40 $ | 0.23% |
| SDLFStandard Life PLC | Financial Services | 925.50 p | −0.16% |
| SDYSpeedy Hire PLC | Industrials | 13.76 p | 0.73% |
| SEESeeing Machines Limited | Technology | 3.69 p | −0.54% |
| SEITSdcl Energy Efficiency Income Trust PLC | Financial Services | 32.00 p | −0.16% |
| SEMIIshares IV PLC Ishares MSCI Global Semic Ucits USD Acc | — | 13.24 £ | −7.85% |
| SEPLSeplat Petroleum Development Company PLC | Energy | 888.00 p | 4.84% |
| SEQISequoia Econ Infrastructure | Financial Services | 79.10 p | −0.88% |
| SFORS4 Capital PLC | Communication Services | 39.40 p | 1.55% |
| SFRSeverfield PLC | Industrials | 38.50 p | −1.79% |
| SFTSoftware Circle plc | Industrials | 17.90 p | −0.56% |
| SGESage Group PLC | Technology | 1,163.50 p | 0.95% |
| SGLNiShares Physical Gold ETC | — | 5,645.00 p | −3.06% |
| SGROSegro Plc | Real Estate | 912.20 p | 0.31% |
| SHAWShawbrook Group PLC | Financial Services | 274.50 p | −8.50% |
| SHCShaftesbury Capital PLC | Real Estate | 146.00 p | 0.14% |
| SHELShell plc | Energy | 4,036.50 p | −0.04% |
| SHISIG plc | Industrials | 9.00 p | −1.10% |
| SHIPTufton Oceanic Assets Ltd | Financial Services | 1.45 $ | 0.00% |
| SIGCSherborne Investors Guernsey C Ltd | Financial Services | 29.50 p | 0.00% |
| SKAShuka Minerals Plc | Basic Materials | 3.35 p | 0.00% |
| SLPSylvania Platinum Limited | Basic Materials | 83.50 p | −2.68% |
| SMHVanEck Semiconductor UCITS ETF | — | 96.24 $ | −7.94% |
| SMIFTwentyFour Select Monthly Income Fund Ltd | Financial Services | 81.90 p | −0.24% |
| SMINSmiths Group PLC | Industrials | 2,697.00 p | −1.57% |
| SMLStrategic Minerals Plc | Basic Materials | 4.90 p | −5.41% |
| SMTScottish Mortgage Investment Trust plc | Financial Services | 1,495.00 p | −3.30% |
| SMWHWH Smith PLC | Consumer Cyclical | 427.20 p | −1.25% |
| SNSmith & Nephew PLC | Healthcare | 1,107.50 p | −1.20% |
| SNDASunda Energy Plc | Energy | 1.40 p | −3.18% |
| SNWSSmiths News PLC | Communication Services | 83.80 p | 2.20% |
| SOISchroder Oriental Income Fund | Financial Services | 426.00 p | −1.73% |
| SOSSosandar Plc | Consumer Cyclical | 10.25 p | 0.00% |
| SOUSound Energy PLC | Energy | 1.40 p | 0.00% |
| SOXSLeverage Shares -4x Short Semiconductors ETP Securities | — | 0.65 $ | 35.36% |
| SPECInspecs Group plc | Healthcare | 88.50 p | −1.67% |
| SPISpire Healthcare Group Plc | Healthcare | 249.00 p | 0.20% |
| SPXLSPDR S&P 500 UCITS ETF USD Acc GBP | — | 14.05 £ | −1.75% |
| SPXPInvesco S&P 500 UCITS ETF | — | 1,140.20 p | −1.74% |
| SPXSInvesco S&P 500 UCITS ETF | — | 15.28 $ | −1.53% |
| SPYLSPDR S&P 500 UCITS ETF USD Acc | — | 18.83 $ | −1.52% |
| SQQQLeverage Shares -3x Short US Tech 100 ETP Securities GBP | — | 2,315.50 p | 15.57% |
| SQS5WisdomTree NASDAQ 100 5x Daily Short | — | 37.30 p | 16.02% |
| SQZSerica Energy PLC | Energy | 259.60 p | −3.85% |
| SRBSerabi Gold PLC | Basic Materials | 179.00 p | −5.49% |
| SRCSigmaroc PLC | Basic Materials | 123.30 p | −0.40% |
| SRESirius Real Estate Limited | Real Estate | 98.20 p | −0.10% |
| SREISchroder Real Estate Investment Trust Ltd | Real Estate | 42.90 p | 0.70% |
| SRESSunrise Resources Plc | Basic Materials | 0.01 p | 0.00% |
| SRPSerco Group | Industrials | 288.20 p | −0.89% |
| SSESse PLC | Utilities | 2,627.00 p | −0.76% |
| SSITSeraphim Space Investment Trust PLC | Financial Services | 175.00 p | −6.42% |
| SSLNiShares Physical Silver ETC | — | 3,494.00 p | −6.25% |
| SSPGSSP Group PLC | Consumer Cyclical | 185.40 p | 0.76% |
| STANStandard Chartered PLC | Financial Services | 2,055.00 p | −2.51% |
| STEMSThree plc | Industrials | 303.50 p | −0.82% |
| STJSt. James's Place plc | Financial Services | 1,040.00 p | −3.03% |
| STXShield Therapeutics plc | Healthcare | 5.65 p | 2.73% |
| SUK2L&G FTSE 100 Super Short Strategy (Daily 2x) UCITS ETF | — | 189.90 p | −0.23% |
| SUNSurgical Innovations Group plc | Healthcare | 0.40 p | 0.00% |
| SUOEiShares € Corp Bond ESG UCITS ETF EUR (Dist) | — | 4.64 € | 0.08% |
| SUPRSupermarket Income REIT PLC | Real Estate | 83.75 p | 0.30% |
| SVMLSovereign Metals Ltd | Basic Materials | 22.00 p | −2.22% |
| SVNSSolvonis Therapeutics plc | Healthcare | 0.10 p | −9.52% |
| SVSSavills | Real Estate | 1,094.00 p | 1.11% |
| SVTSevern Trent PLC | Utilities | 3,306.00 p | 0.92% |
| SWTSwitch Metals Plc | Basic Materials | 5.15 p | −1.90% |
| SYNSynergia Energy Ltd | Energy | 0.01 p | −5.56% |
| SYNCSyncona Limited | Financial Services | 126.60 p | −1.09% |
| SYNTSynthomer plc | Basic Materials | 111.00 p | −3.31% |