The son of a London coal merchant, Stock became a city clerk around 1840, before becoming a general merchant, an insurance broker with the company of Burges and Stock, and an underwriter at Lloyd’s.
A ‘Liberal of very advanced views’, Stock came forward at the Coventry by-election in May 1865 to advocate ‘a considerable extension of the suffrage’. Despite being a ‘conscientious member of the Church of England’, he advocated the abolition of church rates, and was strongly in favour of the establishment of ‘courts of conciliation’ to arbitrate in disputes between the representatives of capital and labour. He was not, however, adopted as a candidate by the Liberal committee.
The contest had been a violent one and Stock was subsequently accused of having hired a mob to support him, but his return was opposed on petition without success. He was also accused of inconsistency regarding the fate of the established church, and his suitability as an Irish representative was called into question.
A supporter of the Irish land tenure and improvement bill, he backed the abolition of church rates, 7 Mar. 1866, but was absent and failed to pair on the ballot motion, 17 July.
He does not appear to have introduced any bills or served on any select committees, but he did speak in the House on several occasions. In May 1867 he denounced the continued suspension of habeas corpus in Ireland ‘as a scandal’, and, observing ‘with pain the apathy which existed on the part of English members when Irish questions were under consideration in the House’, recommended instead the passing of ‘remedial measures for the benefit of the Irish people’.
Stock supported Gladstone’s resolution on the Irish Church, 3 Apr. 1868, and voted for the second reading of his established church (Ireland) bill, which was intended to suspend appointments to the Irish Church, 22 May.
Stock had pursued various business interests during his time in parliament and continued to work as a ship insurance broker and member of Lloyd’s for the remainder of his life.
