The phrase "a former subsidiary" is correct and usable in written English.
It can be used to refer to a company or entity that was previously a subsidiary of another company but is no longer under that ownership.
Example: "After the merger, the company rebranded itself, distancing from its identity as a former subsidiary of the larger corporation."
Alternatives: "an ex-subsidiary" or "a previous subsidiary".
In addition, the interior ministry said it was investigating alleged tax evasion at a former subsidiary of the company.
The US company, a former subsidiary of the Halliburton group, built the Guantánamo detention facility in Cuba.
Bay Harbour recently took control of TelCove, a competitive local exchange carrier that is a former subsidiary of Adelphia Communications.
The dispute dates to the nationalization in 2014 of the Bashneft oil company, a former subsidiary of Sistema.
SAP had admitted that a former subsidiary illegally downloaded the software, but assessed the damage to Oracle, its arch-rival, at around $40m.
We would pass barriers for miles, marked with the initials K.B.R. That's the private American company hired by the government" — a former subsidiary of Halliburton.
The lender lost its chairman and drafted in a new CEO this year as a result of its collapsed former subsidiary IKB one of the first European victims of the subprime crisis which it ended up selling to American private-equity firm Lone Star.
Shearson purchased a 20percentt interest in its former subsidiary, which at the time managed more than $14 billion in assets.
Back in 1999, GM spun off Delphi, but as part of the deal, the carmaker agreed to pay benefits to Delphi retirees in the event of a bankruptcy filing by the former subsidiary.
Komatsu can continue to rely on its former subsidiary and, as a major shareholder, still be treated as a special customer.
Varig, which was recently sold to its former subsidiary, VarigLog, said in a statement that just 3,985 of its current 9,485 employees would retain their jobs.
