| 1 | STK | Aeropac | Callsign: Sat Pak, | USA | AVCODES |
| 2 | STK | Stobart Air (Comhforbairt Gaillimh) | IATA: RE, Callsign: Stobart, Ceased operations on 12 June 2021. Name changed from Cornharbairl Gaillimh Teo d/b/a Aer Arann. ICAO designator changed from REA w.e.f. 04 August 2014. Operates as Aer Arann Express. Designator RE reinstated by IATA | IRL | AVCODES |
| 3 | STK | Aeropac | | | ICAO1 |
| 4 | STK | STK S.A. | | PL | VKM |
| 5 | STKA | STOCKTON AG TRANSPORT | | | SCAC4 |
| 6 | STKC | STANDARD TRUCKING CORPORATION | | | SCAC4 |
| 7 | STKE | STARKE, LARRY B | | | SCAC4 |
| 8 | STKF | STOCKTON FUEL OIL CO INC | | | SCAC4 |
| 9 | STKG | SCHWERMAN TRUCKING CO | | | SCAC4 |
| 10 | STKJ | STAR FISH INC | | | SCAC4 |
| 11 | STKK | STOCKMYER TRUCKING INC | | | SCAC4 |
| 12 | STKM | SUNTEK MANUFACTURING TECHNOLOGIES S | | | SCAC4 |
| 13 | STKN | STOCKMAN TRANSFER INC | | | SCAC4 |
| 14 | STKQ | SOUTHERN TANK LINES LLC | | | SCAC4 |
| 15 | STKT | SUNTECK TRANSPORT CARRIERS INC | | | SCAC4 |
| 16 | STKU | SANTOKU CHEMICAL INDUSTRIES CO. LTD | | J | BIC |
| 17 | STKV | SPIRIT TRANSPORT SYSTEMS INC | | | SCAC4 |
| 18 | STKX | STRICKLAND TRADING, INC. | | | PWRC |
| 19 | STKX | LUCENT POLYMERS INC | | | SCAC4 |
