On Wikipedia https://en.wikipedia.org/wiki/Seattle_Symphony
Creation 1903
Participants Harry West - Conductor from 1903 to 1907
Michael Kegrize - Conductor from 1907 to 1909
Henry Hadley - Conductor from 1909 to 1911
John Spargur - Conductor from 1911 to 1921
Karl Krueger - Conductor from 1926 to 1932
Basil Cameron - Conductor from 1932 to 1938
Nikolai Sokoloff - Conductor from 1938 to 1941
Thomas Beecham - Conductor from 1941 to 1944
Carl Bricken - Conductor from 1944 to 1948
Eugene Linden - Conductor from 1948 to 1950
Manuel Rosenthal - Conductor from 1950 to 1951
Milton Katims - Conductor from 1954 to 1976
Rainer Miedél - Conductor from 1976 to 1983
Gerard Schwarz - Conductor from 1985 to 2011
Ludovic Morlot - Conductor from 2011 to 2019
Thomas Dausgaard - Conductor from 2019
City Seattle, WA, United States
Country United States of America

The orchestra gave its first performance on December 29, 1903, with Harry West conducting. Known from its founding as the Seattle Symphony, it was renamed in 1911 as the Seattle Philharmonic Orchestra. The 1921–22 season was cancelled due to financial problems.

In 1947, the Seattle Symphony merged with the Tacoma Philharmonic to form the Pacific Northwest Symphony Orchestra. Performances were held in Seattle, Tacoma, and Olympia, with conducting duties split between Carl Bricken and Eugene Linden. This arrangement ceased after one season, when the Seattle Symphony decided to withdraw from it. A feud between the musicians and the board surfaced in 1948, and a majority of the musicians divorced themselves from the board and created a new orchestra called the Seattle Orchestra, a partnership (collective) operated by the musicians themselves, who chose Linden as their conductor. An accommodation was reached between the Seattle Symphony and the Seattle Orchestra, and the two organizations merged, and the name "Seattle Symphony Orchestra" was retained. For most of its 100-year history, and especially today, the ensemble is known by the two-word name "Seattle Symphony".

Gerard Schwarz became music advisor of the orchestra in 1983 and principal conductor in 1984, before being named music director in 1985. Under Schwarz's leadership, the orchestra became particularly known for performing works of twentieth-century composers. Together, Schwarz and the orchestra have made more than 100 commercial recordings. The orchestra received its first Grammy nomination in January 1990 for a 1989 recording of music of Howard Hanson. The orchestra also recorded a musical score to the SeaWorld, Orlando, stage show A'lure, The Call of the Ocean.

In October 2009, Ludovic Morlot first guest-conducted the Seattle Symphony in October 2009. He returned in April 2010, as a substitute conductor in the wake of the 2010 Eyjafjallajökull eruptions. Based on these appearance, in June 2010, the orchestra announced the appointment of Morlot as its 15th music director. Morlot has taken particular interest in fostering music from Seattle-based composers, including composers within the orchestra itself. His work with the orchestra has included the commissioning and premiere of John Luther Adams' Become Ocean, which went on to win the 2014 Pulitzer Prize for Music and the 2015 Grammy Award for Best Classical Contemporary Composition. The commercial recording of Become Ocean led to a donation by Taylor Swift to the Seattle Symphony of USD $50,000 to the Seattle Symphony. Wikipedia