- 23 October 2021 - 190,000 works have scores or parts on Petrucci Music Library.
- 12 October 2021 - 610,000 scores.
- 6 October 2021 - 189,000 works have scores or parts on Petrucci Music Library.
- 4 October 2021 - IMSLP now has 71,000 recordings.
- The first edition of Bland’s Oh! Lucinda, published by J.W. Pepper.
- An early edition of Szymanowska’s Caprice sur la romance de Joconde, published by Breitkopf.
- The holograph manuscript of Cimarosa’s Le trame deluse.
- The first edition of Charles K. Harris's Don't You Wish You Were Back Home Again?, published by the composer.
- The first edition of Cilea’s Adriana Lecouvreur, published by Sonzogno.
- Wüllner: 3 Chor-Lieder, Op.16 (#744615)
- Folk Songs: Immaculate Mary (19 files)
- Wüllner: 6 Lieder, Op.34 (#744595)
- Wüllner: 6 Lieder, Op.2 (#744594)
- Decourcelle: Les voyageuses (#744591)
- Decourcelle: Les roses blanches (#744590)
- Graupner: Wir rühmen uns Gottes, GWV 1139/41 (8 files)
- Hays: Angels Guard My Little One (2 files)
- Ascher: Nicodemus and His Banjo (#744578)
- Frescobaldi: Recercar quarto sopra mi, re, fa, mi, F 9.04 (3 files)
- Kozlov: Could I Only Know? (#744367)
- Ferrari: Pastorale sopra Veni redemptor gentium (#744299)
- Pezold: Suite in B-flat major (5 files)
- Zhang: Minuet in Baroque Style (2 files)
- St. Pierre: Un Canadien errant (#743921)
- Grieg: 2 Elegiac Melodies, Op.34 (#743798)
- St. Pierre: À la claire fontaine (#743603)
- Rondeau: Trumpet Canon & Fugue No.163 (#743585)
- Rondeau: Trumpet Canon & Fugue No.162 (#743584)
- Rondeau: Trumpet Canon & Fugue No.161 (#743582)
