Core Liquidity Provider

What Does Core Liquidity Provider Mean?
An underwriter or a market maker that is a sizable holder of a given security or that facilitates the trading of the security. Core liquidity providers ideally bring greater price stability and distribute securities to both retail and institutional investors.

Investopedia explains Core Liquidity Provider
Firms that underwrite or provide the financing for equity or debt transactions and then make a market or assist in the trading of these securities are said to be core liquidity providers. Without their assistance, the number of transactions in the security would decrease and the ability of buy- and sell-side firms to accumulate or dispose of stock would be diminished.