Question: August Anheuser Busch III, is a great-grandson of Anheuser-Busch founder Adolphus Busch and was the company's Chairman, until which date?

Context articles: August Busch III
Adolphus Busch Hall
Eberhard Anheuser
Original Springs Hotel and Bathhouse
August A. Busch Memorial Conservation Area
Kirby Building
Adolphus Busch
August Anheuser Busch Sr.
Adolphus Busch III
Gussie Busch

August Anheuser Busch III (born June 16, 1937) is a great-grandson of Anheuser-Busch founder Adolphus Busch and was the company's Chairman until November 30, 2006.
 August Busch III is informally known as "Auggie" and as "The Third" or "Three Sticks" by subordinates and employees at Anheuser-Busch.
Adolphus Busch Hall is a Harvard University building located at 27 Kirkland Street in Cambridge, Massachusetts.
 It is named for brewer and philanthropist Adolphus Busch, former president of the Anheuser-Busch company, who contributed $265,000 to its building fund.
Eberhard Anheuser (September 27, 1806May 2, 1880) was a German American soap and candle maker, as well as the father-in-law of Adolphus Busch, the founder of the Anheuser-Busch Company.
The Original Springs Hotel and Bathhouse is a mineral spa located at 506 N. Hanover St. in Okawville, Illinois.
 The resort was established in 1867, when founder Rudolph Plegge discovered the presence of minerals like magnesium and sulfur in his well water.
 Plegge and his neighbor C. H. Kelle built a bathhouse on his land; after the bathhouse burned in an 1892 fire, the current hotel and bathhouse were built.
 During the late 19th century, mineral spring resorts became popular due to their purported health benefits, and several new spas opened alongside the Original Springs in Okawville.
 The village became a significant resort destination for wealthy St. Louis businessmen, including brewing magnate August Anheuser Busch, Sr. While most of Okawville's resorts declined after mineral springs fell out of favor, the Original Springs was still a prominent resort as late as 1930.
 Though the spa declined during the Great Depression and the ensuing decades, it modernized in 1962 and remains open as a hotel and spa.
 It is now the only operational mineral spa remaining in Illinois.
August A. Busch Memorial Conservation Area is a 6987 acre conservation area that is owned and managed by the Missouri Department of Conservation.
 Located in St. Charles County, Missouri, the land was purchased by the Department of Conservation with help from Alice Busch, the wife of August Anheuser Busch, Sr., in 1947 from the U.S. Government.
The Kirby Building, historically known as the Busch Building, is a 17-story skyscraper in the Main Street District of Downtown Dallas.
 The structure was completed in 1913 by beer magnate Adolphus Busch to accompany his nearby Hotel Adolphus.
 The building became vacant with many older buildings during the economic downturn of the 1980s.
 While the building was symbolic of downtown's crash in the 1980s, it also served as a symbol of the start of the resurrection as it became the first high-rise to be converted from office use to residential apartments.
 The structure is a Dallas Landmark and listed on the National Register of Historic Places.
Adolphus Busch (10 July 1839 – 10 October 1913) was the German-born co-founder of Anheuser-Busch with his father-in-law, Eberhard Anheuser.
 He introduced numerous innovations, building the success of the company in the late 19th and early 20th centuries.
 He became a philanthropist, using his great wealth for education and humanitarian needs.
 His great-great-grandson, August Busch IV is now on the board of Anheuser-Busch InBev.
August Anheuser Busch Sr. (December 29, 1865 – February 10, 1934) was an American brewing magnate who served as the President and CEO of Anheuser-Busch, based in Saint Louis, Missouri, from 1913 to 1934.
 It became the world's largest brewery in 1957 under direction of his son August A. "Gussie" Busch Jr.
Adolphus Busch III (February 10, 1891 – August 29, 1946) was an American brewing magnate based in Saint Louis, Missouri, who was the President and CEO of Anheuser-Busch from 1934 to 1946.
August Anheuser "Gussie" Busch Jr. (March 28, 1899 – September 29, 1989) was an American brewing magnate who built the Anheuser-Busch Companies into the largest brewery in the world by 1957 as company chairman from 1946 to 1975.