- 1 April 2021 - 22,000 composers.
- 31 March 2021 - 178,000 works have scores or parts on Petrucci Music Library.
- 29 March 2021 - 565,000 scores.
- 19 March 2021 - 177,000 works have scores or parts on Petrucci Music Library.
- The first edition of Sophia Dussek's 3 Italian Airs with Variations, published by Naderman.
- The holograph manuscript of Cimarosa’s I due supposti conti.
- The first edition of Walter Donaldson's Carolina in the Morning, published by Jerome Remnick & Co.
- The first edition of Strauss’s Piano Quartet, Op.13, published by Aibl.
- The first edition of Coleridge-Taylor’s Now Late on the Sabbath Day, published by Novello.
- Sullivan: Patience (#691831)
- Suppé: Boccaccio (#691830)
- Schacht: Giroflé-Girofla Lancers (#691829)
- Pollarolo: Ardea di Filen Clori la vaga (#691828)
- Młynarski: Symphony, Op.14 (#691827)
- Méreaux: Études, Op.63 (6 files)
- Neuland: Jadis Régnait en Normandie from Meyerbeer's Opera of "Robert", Op.13 (2 files)
- Neuland: L'Or est une Chimère, from Meyerbeer's Opera of "Robert", Op.12 (2 files)
- Kapinski: Un momento (2 files)
- Mendelssohn: 5 Pieces, RISM-A2 464001335 (#691814)

- Frederick II: Flute Sonata in B minor, SpiF 62 (#691692)
- Ferrari: Spleen et idéal (#691667)
- Ferrari: Aria sopra Beata nobis gaudia (#691465)
- Ferrari: Toccata sopra Iam Christus (#691464)
- Taverner: In Nomine (#691373)
- Hernández Bellido: Acuarela Sinfónica Op.16 (#690965)
- Mendelssohn: Violin Concerto, Op.64 (3 files)
- Mahler: Rückert Lieder (2 files)
- Hernández Bellido: Concierto en Blanco y Negro Op.11a (3 files)
- Hernández Bellido: Mikroestructuras Op.15 (#690749)
