 H T Group PLC | HAT | GB00B12RQD06 | |
| Haleon PLC | HLN | GB00BMX86B70 | |
 Halfords Group PLC | HFD | GB00B012TP20 | |
 Halma PLC | HLMA | GB0004052071 | |
 Hamak Gold Limited | HAMA | VGG4256S1048 | |
| Hammerson PLC | HMSO | GB00BRJQ8J25 | |
 Hansa Investment Company Limited | HAN | BMG428941162 | |
 Hansa Investment Company Limited | HANA | BMG428941089 | |
 Hansard Global PLC | HSD | IM00B1H1XF89 | |
 Harbour Energy PLC | HBR | GB00BMBVGQ36 | |
| Harbourvest Global Private Equity Limited | HVPD | GG00BR30MJ80 | |
 Harbourvest Global Private Equity Limited | HVPE | GG00BR30MJ80 | |
 Hardide PLC | HDD | GB00BJJPX768 | |
| Harena Rare Earths PLC | HREE | GB00BMGRFP88 | |
| Hargreave Hale Aim VCT PLC | HHV | GB00B02WHS05 | |
 Hargreaves Services PLC | HSP | GB00B0MTC970 | |
 Harvest Minerals Limited | HMI | AU000XINEAB4 | |
 Harworth Group PLC | HWG | GB00BYZJ7G42 | |
 Haydale PLC | HAYD | GB00BKWQ1135 | |
 Hays PLC | HAS | GB0004161021 | |
 Headlam Group PLC | HEAD | GB0004170089 | |
 Heath (samuel) Sons PLC | HSM | GB0004178710 | |
 Heavitree Brewery PLC | HVT | GB0004182506 | |
 Heavitree Brewery PLC | HVTA | GB0004182720 | |
 Heavitree Brewery PLC | HVTB | GB0004182944 | |
 Helical PLC | HLCL | GB00B0FYMT95 | |
 Helios Towers PLC | HTWS | GB00BJVQC708 | |
 Helios Underwriting PLC | HUW | GB00B23XLS45 | |
 Helium One Global Ltd | HE1 | VGG4392T1075 | |
 Helix Exploration PLC | HEX | GB00BPK66X70 | |
| Hellenic Dynamics PLC | HELD | GB00BRXCFB77 | |
 Hemogenyx Pharmaceuticals PLC | HEMO | GB00BQVXM815 | |
| Henderson European Trust PLC | HET | GB00BLSNGB01 | |
| Henderson European Trust PLC | HETA | GB00BTY20154 | |
| Henderson European Trust PLC | HETB | GB00BTY20048 | |
 Henderson Far East Income Limited | HFEL | JE00B1GXH751 | |
 Henderson High Income Trust PLC | HHI | GB0009580571 | |
 Henderson International Income Trust PLC | HINT | GB00B3PHCS86 | |
 Henderson Smaller Companies Investment Trust PLC | HSL | GB0009065060 | |
| Herald Investment Trust PLC | HRI | GB0004228648 | |
 Hercules PLC | HERC | GB00BPVBVZ82 | |
 HG Capital Trust PLC | HGT | GB00BJ0LT190 | |
 Hicl Infrastructure PLC | HICL | GB00BJLP1Y77 | |
| Hidong Estate PLC | HID | GB0004251863 | |
| Highway Capital PLC | HWC | GB0008579384 | |
 Hikma Pharmaceuticals PLC | HIK | GB00B0LCW083 | |
 Hill Smith PLC | HILS | GB0004270301 | |
 Hilton Food Group PLC | HFG | GB00B1V9NW54 | |
 Hiscox Ltd | HSX | BMG4593F1389 | |
 Hochschild Mining PLC | HOC | GB00B1FW5029 | |
| Home REIT PLC | HOME | GB00BJP5HK17 | |
| Hongkong Land Holdings Ltd | HKLB | BMG4587L1090 | |
| Hongkong Land Holdings Ltd | HKLD | BMG4587L1090 | |
 Hostelworld Group PLC | HSW | GB00BYYN4225 | |
 Howden Joinery Group PLC | HWDN | GB0005576813 | |
 HSBC Holdings PLC | HSBA | GB0005405286 | |
| Huddled Group PLC | HUD | GB00BD5JRP64 | |
 Hunting PLC | HTG | GB0004478896 | |
| Hutchmed (china) Limited | HCM | KYG4672N1198 | |
 Hvivo PLC | HVO | GB00B9275X97 | |
 Hwange Colliery Company Limited | HWA | ZW0009011934 | |
| Hydrogen Capital Growth PLC | HGEN | GB00BL6K7L04 | |
 Hydrogen Utopia International PLC | HUI | GB00BMFR8J48 | |
 Proservice Building Services Marketplace PLC | HSS | GB00BVFD4645 | |
 Seneca Growth Capital VCT PLC | HYG | GB0031256109 | |
| Zoyo Limited | HOYE | KYG4598W1024 | |
