Private Equity


Full-service fund administration for sophisticated private equity fund structures. Mainspring deliver a dependable, professional, personalised and cost-effective service using industry-leading systems and a highly secure, resilient and innovative technology platform.

We support UK and International private equity managers launching their initial or follow-on-funds in the UK, Channel Islands and Luxembourg and provide services for large and complex private equity fund structures through the full life cycle of the fund.

Our senior team has many years’ experience of fund administration, including launching new funds, accounting, fund-operations, governance and investment management. This breadth of knowledge delivers a client focused service with a sense of urgency when it matters.

We have an innovative mindset for service delivery, engagement and transparency. Giving you access to your data and reporting, at your fingertips and in your control with a level of granularity and fidelity you require.

Mainspring delivers independent fund administration, accounting and reporting, with a focus on technology and service quality that private equity fund managers can rely on.

Key Contact – Norman Watson

Key Services

Fund Accounting

Mainspring employs industry-leading fund accounting systems and technology enabling us to service every stage of a fund’s life. Every fund is different so we review each new fund for its structure, operational model and reporting requirements to design a service specifically for each fund. Once launched the dedicated team deliver quarterly reporting, financial statements and tax information; manage the annual audit; and address specific fund requirements such as calculating the management fee, the waterfall, consolidations, and equalisations.


Mainspring prides itself on delivering bespoke services designed around the specific needs of each client. This covers the initial set up of the Fund; Investor KYC, set up and transfer agency; investor communications, delivering notices and reporting; managing drawdowns and distributions; banking and payments; the provision of standard quarterly, annual and tax reporting along with bespoke and ad hoc requirements; partner transfers and fund restructuring.

Management Reporting

Mainspring gives the manager access to comprehensive, fully transparent reporting of all up-to-date fund data, portfolio and financial information through a highly secure dedicated portal. This information is available through a variety of self-service options including data file downloads, standard PDF reports and bespoke dashboards.

Investor Reporting

Mainspring provides detailed personalised reporting to investors via a secure online reporting platform, which can be fully branded and linked to the Manager’s website. We give investors access to the standard fund reports and other investor specific reports such as partnership NAV or tax statements; all of which can be formatted as the fund manager requires. This information can be viewed either as PDF reports or on a dashboard, or if required as a data download.

Governance & CoSec

Mainspring provides AIFMD oversight and governance structure to meet compliance requirements in the UK, Channel Islands and Luxembourg. This also includes ongoing oversight of the GP, relationship with the depositary and filings to the local regulator. In addition, Mainspring provides a full Company Secretarial service as required by the Manager. This includes provision of GP board directors, preparation of board packs, arranging and attendance at board meetings, statutory filings, regulatory reporting, LPA and other documentation review.

Compliance & Middle Office

Mainspring offers a full investor AML/KYC review service, maintaining all investor records, and updating as required. Other regulatory requirements are actively managed including holding certificates, making quarterly and annual FCA returns and holding the books and records of the fund. Where required we can assist the fund managers with other fund specific administration or analysis and compilation of fund/investor data acting as an extension of their own back-office teams.

Mainspring Data & Information Engineering
FIS Impact Award for Technology Innovation