Denel SOC Ltd is a South African state-owned aerospace and military technology conglomerate established in 1992. It was created when the manufacturing subsidiaries of Armscor were split off in order for Armscor to become the procurement agency for the South African Defence Force (SADF), now known as the South African National Defence Force (SANDF), and the manufacturing divisions were grouped together under Denel as divisions. It is the largest of South Africa's state owned arms companies. The company had been experiencing major financial problems since 2015 and in 2021 it was announced in Parliament that Denel was on the brink of insolvency. The company stated that its woes were due to declining local defence budgets, weakened relationships with key customers and suppliers, the inability to retain or attract skilled personnel, ongoing salary disputes and a Fitch ratings downgrade.

Denel was established as a state-owned industrial company under the Department of Public Enterprises in April 1992. It inherited most of Armscor's production and research facilities, and over 15,000 employees. At the time of its formation, Denel restructured and reorganised the former Armscor subsidiaries into a number of divisions and subsidiaries within five industrial groups: systems, manufacturing, aerospace, informatics, and properties and engineering services.

Denel has developed a number of notable products, such as:

The Overberg Test Range is used for advanced aerial testing of missiles by Denel and other clients such as NASA, EADS and BAE Systems.

Though Denel's market share is increasing, it still has not signed significant international contracts that will bring a real market return for its investments in development and research costs. In 2006, Denel signed a contract with the Finnish Navy for the Umkhonto air defence missile; this was a significant step, since it was the first significant sale to a western nation. The Swedish defence force was also interested in the Umkhonto missile, but due to budget constraints had to put its purchase on hold.

Although Denel has comparable quality products, at lower prices, it has struggled to attract buyers, with the Rooivalk attack helicopter being a prime example of this. After being developed at a cost of R1 billion, no sales were made as the contract from Turkey for $2 billion was lost. The development of the Rooivalk, which could be Denel's most profitable project, also threatens to result in its largest loss ever.

In 2009 and 2010, RheinMetall Denel, a Denel subsidiary, advertised artisan training programmes and study bursaries which excluded white applicants, but relented after a meeting with trade union Solidarity.

The following divisions form part of Denel