| OLIVERS REAL FOOD LTD. (36S) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| ONCOGENEX PHARMAC. DL-001 (SP4A) ETR - Deutsche Börse XETRA | |
| ONCOPEPTIDES AB O.N. (OND) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| ONCOSIL MEDICAL LTD (N6A) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| ONE HORIZON GRP DL-,001 (B3CP) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| ONE WORLD MINLS (EKU2) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| OOMA INC. DL-,0001 (6OO) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| OPGEN INC. DL-,01 (650) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| OPSENS INC. (5OP) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| OPTHEA LTD (UKJ) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| ORACLE CORP. DL-,01 (ORC) ETR - Deutsche Börse XETRA | |
| ORESTONE MINING CORP. (O2R2) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| ORGANIC GARAGE LTD (9CW1) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| ORIEN.NON-FERR.RES.DV.INC (5ON) FRA - Deutsche Börse Frankfurt Stock Exchange | |
| ORLA MINING (NEW) (O8M) FRA - Deutsche Börse Frankfurt Stock Exchange | |