Mozart finished the Symphony No. 40 in G minor in Vienna in the summer of 1788. It is the middle one of his last three symphonies - Nos. 39, 40 and 41, the Jupiter - all written within a few weeks. He later made a second version that adds two clarinets to the orchestra.
It is one of only two symphonies Mozart wrote in a minor key, both in G minor - the other is the much earlier No. 25 - which is why No. 40 is sometimes called the Great G minor symphony. The first movement has no slow introduction: the violas start a quiet, restless accompaniment over the bass, and the violins slip in on the last beat of the first bar with the theme on this page.
This transcription: Mozart, Symphony No. 40 in G minor, K. 550 (1788), first movement, bars 1-9: the first violins' theme as printed in Hugo Ulrich's four-hand arrangement (New York: G. Schirmer, 1908), archive.org twelvecelebrated00moza, page n40 (primo), bass line from page n39 (secondo); transposed to A minor and down an octave, arranged by GOONS Studio.
Transcribed by GOONS Studio from the original work, which is in the public domain.