| 1904 | Im Sommerwind | Confirmed | 12' |
| 1908 | Passacaglia, op. 1 | Confirmed | 11' |
| 1909 | Six Pieces for Orchestra, op. 6 | Confirmed | 12' |
| 1910 | Two Songs (Rilke), op. 8 | Confirmed | 5' |
| 1913 | Five Pieces for Orchestra, op. 10 | Confirmed | 6' |
| 1918 | Four Songs for soprano and chamber orchestra, op. 13 | Confirmed | 7' |
| 1921 | Six Songs (Trakl), op. 14 | Confirmed | 8' |
| 1922 | Five Sacred Songs, op. 15 | Confirmed | 6' |
| 1924 | Five Canons on Latin Texts, op. 16 | Confirmed | 3' |
| 1925 | Three Songs, op. 18 | Confirmed | 3' |
| 1925 | Three Traditional Rhymes, op. 17 | Confirmed | 3' |
| 1926 | Two Songs for mixed chorus and ensemble, op. 19 · chorus | Confirmed | 2' |
| 1928 | Symphony, op. 21 | Confirmed | 10' |
| 1931 | Schubert: Six German Dances, D. 820 — orchestrated by Webern | Confirmed | 9' |
| 1934 | Concerto for Nine Instruments, op. 24 | Confirmed | 8' |
| 1935 | Das Augenlicht, op. 26 · chorus | Confirmed | 6' |
| 1935 | J. S. Bach: Fuga (Ricercata) a 6 voci from The Musical Offering, BWV 1079 — orchestrated by Webern | Confirmed | 8' |
| 1939 | Cantata No. 1, op. 29 · chorus | Confirmed | 8' |
| 1940 | Variations for Orchestra, op. 30 | Confirmed | 8' |
| 1943 | Cantata No. 2, op. 31 · chorus | Confirmed | 13' |