Cloburn Quarry, the Lanarkshire company owned by political activist Robert Durward, scrapped its donations to the New Party and the Progressive Party last year, according to its Companies House accounts.
They show a resilient performance by Cloburn, the red granite quarry, in the year to September 2012.
The directors write that against a background of continuing deep recession in the construction industry, the company maintained turnover and net profit levels in 2012 but at levels deflated from pre-recession years.
Pre-tax profit, which hit £5.5m in 2008, rose from £2.13m to £2.39m, on turnover down from £8.6m to £8.4m, which the directors say was "encouraging" but overheads "continue to be monitored". Quarry employment was cut from 36 to 32 during the year.
In the current year, the directors expect the continuing recession in the industry to create great uncertainty.
They are "actively seeking alternative outlets and developing new products to ease the effects on the company's trade", continuing to seek an increase in export sales, and trying to "increase production efficiency in an environmentally-friendly manner".
Mr Durward founded the Scientific Alliance as a pressure group to counter the renewables lobby, and it produced a 2011 report with the Adam Smith Institute warning of a UK energy crisis by 2015.
The company increased net funds by £1m to £3.76m last year, and shareholder funds from £22.1m to £23.9m.
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