Mandated lead arranger
A mandated lead arranger (MLA) is the bank or banks appointed by the borrower to structure the facilities, negotiate principal commercial terms and arrange syndication to other lenders under a common set of documents. JMLSG states that under a syndicated loan the borrower typically appoints one or more mandated lead arrangers, which then sell down parts of the loan to other lenders in the primary market while often retaining a proportion themselves. Documentation usually follows Loan Market Association recommended forms, with each lender's liability limited to its participation.
Mandated lead arranger use on bank PF and EF desks
On project finance and export finance desks the MLA is the origination lead for large limited-recourse or ECA-backed packages that exceed a single lender's hold appetite. JMLSG lists projects, real estate, infrastructure and structured trade among the financings commonly raised in the syndicated market. The MLA works with the borrower to agree facility type, negotiate broad terms, and advise on roles, timetable and approach to the market.
In export finance, the MLA often coordinates commercial lenders alongside export credit agency cover or a direct lending tranche; the OECD Arrangement's market benchmark transaction rules require a minimum commercial-lender share and pari passu pricing terms when official support is combined with a commercial syndicate. A deal may have several MLAs sharing underwriting and distribution.
Mechanics: underwrite, best efforts and bookrunning
JMLSG distinguishes underwritten and best-efforts mandates. Under an underwritten mandate the MLA guarantees the full facility commitment and bears the risk of incomplete syndication, remaining obliged to fund any shortfall (subject to later secondary sell-down). Under best efforts the MLA commits only to a stated amount and undertakes to seek other lenders for the balance, leaving syndication shortfall risk with the borrower.
The associated bookrunner role controls the primary distribution process and the final syndicate composition; the bookrunner is usually from the same institution as an MLA. Although the MLA is a party to the facility documentation, JMLSG states that the arranging role ceases once documentation is signed and the facility has been syndicated, unless the MLA remains a lender. Ongoing administration then passes to the facility agent, and secured deals appoint a security trustee for the shared package.
Boundaries
A mandated lead arranger is not, by that title alone, the facility agent or the security trustee, even though the same bank often holds those roles after close. Title inflation in tombstones (lead arranger, arranger, co-arranger) reflects hold size and fees; the MLA designation denotes the institutions that received the borrower's mandate to arrange the deal.