| Ampeak Energy Limited | SAE | SG9999011118 | |
 Chelverton UK Dividend Trust PLC | SDV | GB0006615826 | |
| Inspecs Group PLC | SPEC | GB00BK6JPP03 | |
| M C Saatchi PLC | SAA | GB00B01F7T14 | |
 Microlise Group PLC | SAAS | GB00BLR8L223 | |
| Microsalt PLC | SALT | GB00BQB6FF85 | |
 S U PLC | SUS | GB0007655037 | |
 S4 Capital PLC | SFOR | GB00BFZZM640 | |
 Sabien Technology Group PLC | SNT | GB00BN6JG812 | |
| Sabre Insurance Group PLC | SBRE | GB00BYWVDP49 | |
 Safestay PLC | SSTY | GB00BKT0J702 | |
 Safestore Holdings PLC | SAFE | GB00B1N7Z094 | |
 Saga PLC | SAGA | GB00BMX64W89 | |
 Sainsbury (J) PLC | SBRY | GB00B019KW72 | |
 Sanderson Design Group PLC | SDG | GB0003061511 | |
 Santander UK PLC | SANB | GB0000044221 | |
 Sareum Holdings PLC | SAR | GB00BMC3RJ87 | |
| Satsuma Technology PLC | SATS | GB00BMFCRZ80 | |
 Savannah Energy PLC | SAVE | GB00BP41S218 | |
 Savannah Resources PLC | SAV | GB00B647W791 | |
 Savills PLC | SVS | GB00B135BJ46 | |
 Scancell Holdings PLC | SCLP | GB00B63D3314 | |
 Schroder Asiapacific Fund PLC | SDP | GB0007918872 | |
 Schroder British Opportunities Trust PLC | SBO | GB00BN7JZR28 | |
 Schroder BSC Social Impact Trust PLC | SBSI | GB00BF781319 | |
 Schroder European Real Estate Investment Trust PLC | SERE | GB00BY7R8K77 | |
 Schroder Income Growth Fund PLC | SCF | GB0007915860 | |
 Schroder Japan Trust PLC | SJG | GB0008022849 | |
 Schroder Oriental Income Fund Limited | SOI | GB00B0CRWN59 | |
 Schroder Real Estate Investment Trust Limited | SREI | GB00B01HM147 | |
 Schroder UK Mid Cap Fund PLC | SCP | GB0006108418 | |
 Schroders PLC | SDR | GB00BP9LHF23 | |
 Science Group PLC | SAG | GB00B39GTJ17 | |
 Scottish American Investment Co PLC | SAIN | GB0007873697 | |
 Scottish Mortgage Investment Trust PLC | SMT | GB00BLDYK618 | |
 Scottish Oriental Smaller Companies Trust PLC | SST | GB00BRBL6574 | |
 Sdcl Efficiency Income Trust PLC | SEIT | GB00BGHVZM47 | |
 SDI Group PLC | SDI | GB00B3FBWW43 | |
 Sealand Capital Galaxy Limited | SCGL | KYG7948E1026 | |
| Seascape Energy Asia PLC | SEA | GB00BKFW2482 | |
| Secure Property Development Investment PLC | SPDI | CY0102102213 | |
 Secure Trust Bank PLC | STB | GB00B6TKHP66 | |
 Seed Capital Solutions PLC | SCSP | GB00BL6CFR81 | |
 Seed Innovations Limited | SEED | GG00BRK9BQ81 | |
 Seeen PLC | SEEN | GB00BK6SHS41 | |
 Seeing Machines Limited | SEE | AU0000XINAJ0 | |
 Segro PLC | SGRO | GB00B5ZN1N88 | |
 Selkirk Group PLC | SELK | GB00BPW7W965 | |
 Seneca Growth Capital VCT PLC | SVCT | GB00BG13MH08 | |
| Senior PLC | SNR | GB0007958233 | |
 Seplat Energy PLC | SEPL | NGSEPLAT0008 | |
 Sequoia Economic Infrastructure Income Fund Limited | SEQI | GG00BV54HY67 | |
 Serabi Gold PLC | SRB | GB00BG5NDX91 | |
 Seraphim Space Investment Trust PLC | SSIT | GB00BKPG0138 | |
| Serco Group PLC | SRP | GB0007973794 | |
 Serica Energy PLC | SQZ | GB00B0CY5V57 | |
 Severfield PLC | SFR | GB00B27YGJ97 | |
 Severn Trent PLC | SVT | GB00B1FH8J72 | |
| Shaftesbury Capital PLC | SHC | GB00B62G9D36 | |
 Shawbrook Group PLC | SHAW | GB00BV9DPV21 | |
 Shearwater Group PLC | SWG | GB00BKT6VH21 | |
 Shefa Gems Ltd | SEFA | IL0011101057 | |
 Shell PLC | SHEL | GB00BP6MXD84 | |
 Sherborne Investors (guernsey) C Limited | SIGC | GG00BZ3C3B94 | |
| Shield Therapeutics PLC | STX | GB00BYV81293 | |
| Shires Income PLC | SHRS | GB0008052507 | |
 Shoe Zone PLC | SHOE | GB00BLTVCF91 | |
| Shuka Minerals PLC | SKA | GB00BN47NP32 | |
| SIG PLC | SHI | GB0008025412 | |
 Sigmaroc PLC | SRC | GB00BYX5K988 | |
 Silver Bullet Data Services Group PLC | SBDS | GB00BNXM0Z89 | |
 Sintana Energy Inc | SEI | CA82938H1073 | |
 Sirius Real Estate Limited | SRE | GG00B1W3VF54 | |
 Sivota PLC | SIV | GB00BMH30492 | |
 Skillcast Group PLC | SKL | GB00BNLXS042 | |
 Skinbiotherapeutics PLC | SBTX | GB00BF33H870 | |
 Slingsby (H.C.) PLC | SLNG | GB0008138009 | |
 Smart (J.) Co. (contractors) PLC | SMJ | GB00B76BK617 | |
 Smarttech247 Group PLC | S247 | GB00BMGNDN03 | |
 Smith Nephew PLC | SN. | GB0009223206 | |
 Smiths Group PLC | SMIN | GB00B1WY2338 | |
| Smiths News PLC | SNWS | GB00B17WCR61 | |
 Smithson Investment Trust PLC | SSON | GB00BGJWTR88 | |
| Smurfit Westrock PLC | SWR | IE00028FXN24 | |
 Social Housing REIT PLC | SOHO | GB00BF0P7H59 | |
 Softcat PLC | SCT | GB00BYZDVK82 | |
| Software Circle PLC | SFT | GB0009638130 | |
 Solgold PLC | SOLG | GB00B0WD0R35 | |
 Solid State PLC | SOLI | GB0008237132 | |
| Solvonis Therapeutics PLC | SVNS | GB00BMD1Z199 | |
 Somero Enterprise Inc | SOM | USU834501038 | |
 Sorted Group Holdings PLC | SORT | GB00BPDX2041 | |
 Sosandar PLC | SOS | GB00BDGS8G04 | |
 Sound Energy PLC | SOU | GB00B90XFF12 | |
 South32 Limited | S32 | AU000000S320 | |
 Southern Energy Corp. | SOUC | CA8428133059 | |
 Sovereign Metals Limited | SVML | AU000000SVM6 | |
 Spaceandpeople PLC | SAL | GB00BPQDJM21 | |
 Spectra Systems Corporation | SPSC | USU8457D1091 | |
 Spectra Systems Corporation | SPSY | US84756T1060 | |
