Anonymous IV identified seven works, that he presumably considered worthy of singling out, and these represent the only direct attribution.
Subsequent authors have attributed works on stylistic and chronological grounds.
These include Friedrich Ludwig (1910), Heinrich Husmann (1940), Hans Tischler (1950) and Ethel Thurston (1970).
Husmann added an additional nine three-part organa, and five clausula to which Ludwig added numerous other clausula.
Other authors have attributed all the three-part organa in the Magnus Liber to Pérotin, which is unlikely.
Nevertheless, two of the only three known four-part organa can be attributed to him.

Key: Anonymous IV (A), Johannes de Garlandia (G), Tischler (Ti), Thurston (Th), Husmann (H).
Numbers refer to folios in the F manuscript of the Magnus liber.

Four-part organa
Viderunt omnes, continued with organal motet Homo cum mandato (A)(Ti)(Th)(H) F1
Sederunt principes, with organal motet De Stephani roseo (A)(Ti)(Th)(H)
Sederunt principes, continued with organal motet Adesse festina (A)(Th)(H)
Three-part organa
Alleluia nativitas (A)(Ti)(Th)(H) F31
Alleluia, Posui adiutorium (A)(G)(Ti)(H) F36
Alleluia, Dies sanctificatus (Ti)
Alleluia, Pascha nostrum (Ti)(H)
Alleluia, Dilexit Andream (H)
Stirps Yesse (Ti)
Virgo (Ti)(H)
Sancte Germane(H)
Terribilis(H)
Exiit sermo (H)
Conductus
French conductus motet Se i'ai ame: Ex semine (Th)
3 part Conductus Salvatoris hodie (A)(Ti)(Th)(H) F307
2 part Conductus Dum sigillum summi patris (A)(Ti)(Th)(H) F344
1 part Conductus Beata viscera Marie virginis (A)(Ti)(Th)(H)
5 Benedicamus Domino (Ti) (3 (H))
3 part clausulas
In odorem (H)
Et illuminare (H)
Et gaudebit (H)
Et exaltavi (H)
2 part clausulas (numerous (H))
Doubtful
4 part Clausula Mors (H)
Anonymous IV identified seven works, that he presumably considered worthy of singling out, and these represent the only direct attribution. Subsequent authors have attributed works on stylistic and chronological grounds. These include Friedrich Ludwig (1910), Heinrich Husmann (1940), Hans Tischler (1950) and Ethel Thurston (1970). Husmann added an additional nine three-part organa, and five clausula to which Ludwig added numerous other clausula. Other authors have attributed all the three-part organa in the Magnus Liber to Pérotin, which is unlikely. Nevertheless, two of the only three known four-part organa can be attributed to him.
Key: Anonymous IV (A), Johannes de Garlandia (G), Tischler (Ti), Thurston (Th), Husmann (H). Numbers refer to folios in the F manuscript of the Magnus liber.
Four-part organa
Viderunt omnes, continued with organal motet Homo cum mandato (A)(Ti)(Th)(H) F1
Sederunt principes, with organal motet De Stephani roseo (A)(Ti)(Th)(H)
Sederunt principes, continued with organal motet Adesse festina (A)(Th)(H)
Three-part organa
Alleluia nativitas (A)(Ti)(Th)(H) F31
Alleluia, Posui adiutorium (A)(G)(Ti)(H) F36
Alleluia, Dies sanctificatus (Ti)
Alleluia, Pascha nostrum (Ti)(H)
Alleluia, Dilexit Andream (H)
Stirps Yesse (Ti)
Virgo (Ti)(H)
Sancte Germane(H)
Terribilis(H)
Exiit sermo (H)
Conductus
French conductus motet Se i'ai ame: Ex semine (Th)
3 part Conductus Salvatoris hodie (A)(Ti)(Th)(H) F307
2 part Conductus Dum sigillum summi patris (A)(Ti)(Th)(H) F344
1 part Conductus Beata viscera Marie virginis (A)(Ti)(Th)(H)
5 Benedicamus Domino (Ti) (3 (H))
3 part clausulas
In odorem (H)
Et illuminare (H)
Et gaudebit (H)
Et exaltavi (H)
2 part clausulas (numerous (H))
Doubtful
4 part Clausula Mors (H)
Pérotin