It looks like NAB is the lender and the others would be borrowing to short SIR. Normally investors are not allowed to 'naked short' stocks, so to short a stock they would have to borrow or have an agreement to borrow.
NAB Price at posting:
$35.18 Sentiment: None Disclosure: Not Held
SIR Price at posting:
$3.90 Sentiment: Hold Disclosure: Held
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