The airline will continue to fly while it is in bankruptcy protection and its affiliates in Argentina, Brazil and Paraguay were not included in the Chapter 11 filing.
US carrier Delta Air Lines Inc is the biggest shareholder in LATAM, having last year paid $1.9 billion for a 20 per cent stake during better times for the industry.
LATAM said it had secured funding from other major shareholders, including the Cueto and Amaro families and Qatar Airways, to provide up to $900 million in debtor-in-possession financing.
"To the extent permitted by law, the group would welcome other shareholders interested in participating in this process to provide additional financing," the airline said, adding it had about $1.3 billion in cash on hand.