"All conditions to the transaction have therefore now been satisfied and JM is working with Honeywell to proceed to completion, which will take place by no later than the end of August 2026, as previously announced," it said.
The company announced last May that it had agreed to sell the CT business to Honeywell for £1.8bn. It said at the time that the deal would deliver net proceeds of around £1.6bn, of which £1.4bn would be returned to shareholders after completion.
Johnson Matthey said that following the sale, it would be "repositioned as a highly streamlined group focused on Clean Air and PGMS, driving sustained strong cash generation to support attractive ongoing returns to shareholders".
At 1404 BST, the shares were up 4.4% at 2,003.55p.
See latest RNS on Investegate