Altron made an offer through its wholly-owned subsidiary, Altron Finance Proprietary Limited, to acquire the entire issued ordinary share capital of Altech in May.
The move has been widely expected by the market following a poor run of results from Altech.
Altron will pay R47.50 in cash for every Altech Share. It already owns a 62% stake in Altech.
A general meeting of Altron shareholders will be held on 26 July 2013 to vote on the proposal.
The aim of the transaction is to create a single listed point of entry into the Altron Group, and simplify the corporate and operating structure.
According to Altron, the Altech brand will remain in place, while management structures have as yet not been finalised.
In midday trade on the JSE, Altech advanced 0.64% to to R45.80.