BlackRock Throgmorton Trust () is a large British investment trust dedicated to small and mid-sized company investments. It is listed on the London Stock Exchange and is a constituent of the FTSE 250 Index.
The company was established as The Throgmorton Trust in December 1962. The company owned, in the early 1980s, a subsidiary known as Capital for Industry which acquired majority interests in consumer businesses such as Morphy Richards.
The fund has been managed by BlackRock since July 2008 and the chairman is Chris Samuel.
In February 2026, BlackRock announced that BlackRock Throgmorton Trust would merge with BlackRock Smaller Companies Trust. This would be achieved by the transfer of assets from BlackRock Throgmorton Trust and the subsequent winding up of that company.