Amcu, the biggest union at Amplats, will ask members to decide on a possible strike in January after a two-week break.
The company has issued a letter warning workers and the union it may have to cut jobs as it continues to lose millions to industrial action each day.
SA's second-largest food producer by value, Pioneer Foods, is calling it quits after a tough year in the broiler industry.
Margins of the country's largest food and household goods company have been under pressure as consumers have spent less over the past financial year.
The biggest union in the platinum sector can now strike with a 48-hour notice after rejecting a pay increase offer from the platinum giant.
Cutting capital expenses and funds raised from a rights issue have put the Lonmin back on a sound footing.
Steelmakers are frustrated by slow infrastructure development exacerbated by spending cuts in the mining sector.
A member of the Anglo American group, Kumba Iron Ore, says it needs a new mining permit to access about a third of reserves at its Sishen mine.
Anglo American Platinum's majority union says its members will decide whether to go back to work at the mine after hearing a new job-cut proposal.
The recently negotiated 8% pay increase for gold miners will be a hollow victory for those who stand to lose their jobs.