Spark and Anchorage Unleash Institutional-Grade Bitcoin Loans

Spark, the lending arm of the Sky ecosystem, has allocated $210 million for institutional loans backed by Bitcoin and custodied through Anchorage Digital. This partnership combines DeFi's capital efficiency with regulated infrastructure that meets the needs of institutions.

The setup relies on Anchorage's Atlas platform, which serves as the collateral agent in a tri-party lending arrangement. It monitors loan-to-value ratios, processes payments, and handles margin calls and liquidations when collateral values dip too far. This allows borrowers to access Spark's liquidity pools without moving their Bitcoin fully on-chain.

Three institutional counterparties have already borrowed $150 million in USDC against $222 million worth of BTC, resulting in a collateralization rate of roughly 148%. This means borrowers are posting nearly $1.50 in Bitcoin for every dollar they take out. The growth trajectory is impressive, with Anchorage's allocation within Spark's overall lending book growing by approximately 70% to around $260 million by the end of Q2 2026.