| 421 |  OBASE | OBASE BILGISAYAR | ₺41,74 | −2,54% | 17:58:16 |
| 422 |  ODAS | ODAS ELEKTRIK | ₺6,18 | −1.203,57% | 17:59:57 |
| 423 |  ODINE | ODINE TEKNOLOJI | ₺347,75 | +0,59% | 17:59:44 |
| 424 |  OFSYM | OFIS YEM GIDA | ₺70,95 | −0,98% | 17:59:51 |
| 425 |  ONCSM | ONCOSEM ONKOLOJIK SISTEMLER | ₺301,00 | −0,72% | 17:59:50 |
| 426 |  ONRYT | ONUR TEKNOLOJI | ₺72,25 | −0,56% | 17:58:24 |
| 427 |  OPK30 | OSMANLI PORTFOY KATILIM 30 ENDEKS HSY BYF | ₺60,58 | +0,50% | 17:51:35 |
| 428 |  OPT25 | OSMANLI PORTFOY BIST TEMETTU 25 ENDEKS HSY BYF | ₺52,10 | +4,66% | 17:52:38 |
| 429 |  OPTGY | OSMANLI PORTFOY KAR PAYI ODEYEN BIST GYO HSY BYF | ₺163,30 | +0,36% | 17:49:53 |
| 430 |  OPTLR | OSMANLI P BIST TLREF(TL) END BYF | ₺51,34 | +0,69% | 17:39:33 |
| 431 |  OPX30 | OSMANLI PORTFOY BIST 30 HSY BYF | ₺81,38 | +3,95% | 17:56:53 |
| 432 |  ORCAY | ORCAY ORTAKOY CAY SANAYI | ₺3,74 | −22,08% | 17:39:36 |
| 433 |  ORGE | ORGE ENERJI ELEKTRIK | ₺72,60 | +2,47% | 17:59:17 |
| 434 |  ORMA | ORMA ORMAN MAHSULLERI | ₺163,90 | +0,34% | 09:55:07 |
| 435 |  OSMEN | OSMANLI MENKUL | ₺8,37 | −10,19% | 17:57:11 |
| 436 |  OSTIM | OSTIM ENDUSTRIYEL YAT | ₺2,99 | +51,01% | 17:59:24 |
| 437 |  OTKAR | OTOKAR | ₺432,25 | −0,26% | 17:59:55 |
| 438 |  OTTO | OTTO HOLDING | ₺325,00 | +0,71% | 17:59:03 |
| 439 |  OYAKC | OYAK CIMENTO | ₺27,42 | +2,47% | 17:59:58 |
| 440 |  OYAYO | OYAK YAT. ORT. | ₺54,20 | +4,35% | 17:50:35 |
| 441 |  OYLUM | OYLUM SINAI YATIRIMLAR | ₺8,47 | −14,18% | 17:58:27 |
| 442 |  OYYAT | OYAK YATIRIM MENKUL | ₺46,44 | +1,04% | 17:53:48 |
| 443 |  OZATD | OZATA DENIZCILIK | ₺161,60 | +1,76% | 17:59:30 |
| 444 |  OZGYO | OZDERICI GMYO | ₺2,09 | +29,81% | 17:58:24 |
| 445 |  OZKGY | OZAK GMYO | ₺15,25 | +10,59% | 17:56:30 |
| 446 | OZKGY | OZAK GMYO | ₺15,25 | +10,59% | 17:56:30 |
| 447 |  OZRDN | OZERDEN AMBALAJ | ₺16,15 | −10,43% | 17:58:42 |
| 448 |  OZSUB | OZSU BALIK | ₺20,02 | −9,70% | 17:58:45 |
| 449 |  OZYSR | OZYASAR TEL | ₺42,86 | −9,18% | 17:59:51 |
| 450 |  PAGYO | PANORA GMYO | ₺88,55 | −1,01% | 17:56:39 |
