MacKay Shields LLC | 6,160 followers on LinkedIn. Leader in Specialty Fixed Income | MacKay Shields LLC (together with its subsidiaries, "MacKay")*, a New York Life Investments company, is a global boutique investment firm with $155 billion in assets under management as of June 30, 2025. We provide investors with specialty fixed income expertise across global fixed income markets including municipal bonds, structured credit, corporate credit and emerging market debt. For decades, our dedicated teams of specialists have delivered customized solutions backed by disciplined research and a commitment to delivering long-term value for its clients.