About 200 more workers are employed in subsidiaries around the world.
The board has voted for now to put the corridor in a separate subsidiary.
Many companies that need capital have found a way to get it from the market, often by selling shares in a subsidiary.
At the beginning of the year a group had a 55% interest in a lossmaking subsidiary.
It employs 800 people in 5 production sites and several international subsidiaries.
Some may not be able to isolate liability in subsidiaries.
Burlington Northern will keep a non-voting interest in its former subsidiary, the company said.
But investors would probably be hit with a tax liability by gaining an ownership stake in a subsidiary of a company they already own.
Avon's deal to sell its majority interest in a Japanese subsidiary appears to have fallen apart.
But a gain on the sale of a stake in a subsidiary came to $47 million, so without it the company would have reported a loss.