Hicks was brought up in his father's business and took over the business from his mother, who died in 1592. He imported rich silks from Italy and other foreign places. Through the influence of his brother
Michael he contracted a large amount of business with the
court and amassed a large fortune. Hicks sold "watchet" blue velvet and taffeta for
bed hangings to the
Earl of Northumberland in 1586, from his shop at the sign of the White Bear. By 1596 he was appointed
Mercer to
Queen Elizabeth I regarding the purchase of fabrics. In April 1602 Hicks supplied Elizabeth I with satin used for "
maskes and
byllements". Hicks supplied textiles to
James VI of Scotland, notably for the occasion of the
baptism of Prince Henry at
Stirling Castle in 1594. Hicks wrote to James VI on 1 March 1600 hoping for repayment of sums due to him by
Robert Jousie, a bankrupted textile merchant working on the king's behalf. He had written twice before to the king, and was disappointed to hear from the Scottish ambassador that he would not be paid from the
annuity awarded by Queen Elizabeth. Hicks employed
Humphrey Dethick as his factor in Florence buying fabrics, until he left in 1602. Having made large loans to the Crown and prominent courtiers, he was knighted on 23 July 1603, soon after the accession of James I. Hicks was one of the first citizens who kept a shop (at the White Bear on
Cheapside) to continue in trade once knighted. James ordered Hicks to send a variety of fabrics to Scotland for his wife,
Anne of Denmark. Hicks was asked to supply crimson velvet, damask, and satin for the
coronation on 25 July. He was paid £3,000, but was left with 1,400 yards of unused fabric. He was in dispute with the
Court of Aldermen of the
City of London because he was unwilling to serve as an alderman; however the king directed that he be excused as a "king's servant". Hicks supplied King James' court with silks and "rich mercery ware", and supplied velvet to
Bess of Hardwick and her son
William Cavendish, 1st Earl of Devonshire. He was allocated £2000 from the duty on sea coal to remunerate him for fabric supplied to royal wardrobe ordered by the
Earl of Dunbar. With Thomas Woodward, Hicks provided the fabrics supplied to
Princess Elizabeth for her
wedding to Frederick V of the Palatinate in February 1613 and to the Lord Chancellor,
Francis Bacon, for the visit of the
Archbishop of Spalato in 1618. Hicks was created a
baronet on 1 July 1620 and began a career in public service. He was appointed one of the Commissioners to inquire into the condition of St. Paul's Cathedral, and was elected as MP for Tavistock in 1620, and for Tewkesbury from 1624 to 1628. On 5 May 1628 he was ennobled as Baron Hicks of Ilmington in the County of Warwick, and Viscount Campden of Campden. ==Estates and philanthropy==