SEI has announced a strategic partnership with Prosperity IFA to act as discretionary investment manager for the independent financial adviser firm’s tailored, white-labelled range of model portfolios.

The Pegasus model portfolio service (MPS) range, which is managed by SEI, aims to strengthen Prosperity’s central investment proposition and client experience through a scalable and tailored investment framework.

Third-party MPS providers accounted for most of the growth in multi-asset sales in the UK during the second half of 2024, according to analysis from ISS Market Intelligence.

SEI noted that standard in-house propositions can become complex and inefficient as businesses evolve, which requires teams to spend more time adapting processes reactively, and researching and managing investment changes.

Therefore, it argued that working with an MPS provider can reduce end costs, streamline processes, improve performance, and enable advisers to focus on engaging with clients for growth-oriented firms.

Commenting on the partnership, Prosperity IFA CEO and founder, Simon Munday, said: “We are delighted to partner with SEI to launch a new range of investment portfolios as part of our commitment to delivering high-quality, forward-thinking solutions for our clients.

“SEI’s global scale, institutional expertise, and robust investment infrastructure complement our own advice-led approach, enabling us to offer enhanced portfolio design, deeper risk management, and greater operational efficiency.

“This partnership supports our long-term strategy to provide clients with greater value, transparency, and investment confidence.”

SEI head of asset management for EMEA, Ian Love, commented: “In today’s dynamic economic landscape, consistency and personalisation are no longer optional—they’re essential to achieving investors’ financial goals.

“Our goals-based investment philosophy, customisable solutions, and deeply consultative approach to strategic partnerships can help IFAs of varying sizes centre their offerings around these key ingredients. Our strategic partnership with Prosperity IFA reflects a shared commitment to investment excellence and putting clients at the heart of everything we do.

“Our discretionary portfolio and operational services will empower Prosperity to offer tailored portfolios at attractive price points, supporting clients in achieving their financial goals, while scaling for the future. We’re delighted to help drive strong client outcomes for Prosperity and support their exciting growth ambitions.”

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