# Ampex Retirement Master Trust Ampex Retirement Master Trust is a Pension Fund based in Stamford, United States. ## Overview - **Organization type:** Pension Fund - **Headquarters:** Stamford, United States - **Region:** North America - **Address:** Stamford, CT, United States - **Assets under management:** Undisclosed ## Regulatory record - **Reports private funds:** No ## About The trust was established to manage retirement obligations for former employees of Ampex Corporation, the pioneering magnetic recording company that dwindled after its 1980s peak. John N. Irwin III holds indirect majority ownership of the trust's manager, Park A.Q. Pension Management, while Raymond Weldon exercises voting control over assets as the entity's director and managing director of Brookside Equity Partners. The trust maintains its administrative seat in Stamford, though its operational profile remains notably opaque. Unlike most U.S. corporate pension plans, which operate under ERISA's transparency framework, Ampex Retirement Master Trust's structure and reporting sit outside standard public-company benefit-plan disclosures. The trust surfaces in investment records primarily as a limited partner in private market vehicles, with a strategy list that reads like a generalist's multi-asset mandate: buyout, distressed debt, direct secondaries, mezzanine, natural resources, and special situations. Its co-investment activity includes documented participation alongside Alicia Grace as lead claimant in the Oro Negro arbitration against the United Mexican States, an unusual posture for a retirement vehicle. Slate Street Bank & Trust has served as trustee, though the trust's relationship web also includes Sherborne Holdings, Hillside Capital, and Brookside Equity Partners — entities more commonly associated with special-situations investing than routine pension administration. The trust engages across fund commitments, co-investments, and direct secondaries, with a geographic footprint that extends from U.S. middle-market deals to cross-border exposures in Latin America. The trust does not publicly disclose AUM or deployment figures. Its known network includes at least three interconnected management entities — Park A.Q. The trust has maintained its investment program across multiple decades, surviving the decline of its original corporate sponsor. What distinguishes Ampex Retirement Master Trust structurally is its legal personality as an international claimant. Pension funds typically avoid litigation exposure; this trust initiated treaty arbitration, demonstrating an activist posture and sufficient separate legal capacity to pursue sovereign claims independently of its sponsoring employer. The governance chain — Irwin, Weldon, Park A.Q., Brookside, Hillside, Sherborne — forms a constellation of affiliated entities through which investment decisions and asset custody flow, making this one of the more architecturally complex private pension trusts in the U.S. record. ## Sectors - Buyout - Distressed Debt - Secondaries & Special Situations - Natural Resources - Mezzanine - Growth ## People - Raymond F. Weldon — Director of Park A.Q. Pension Management; Managing Director of Brookside Equity Partners - John N. Irwin III — Indirect majority owner of Park A.Q. Pension Management, Inc. ## Questions ### Who controls the investment decisions at Ampex Retirement Master Trust? Raymond F. Weldon exercises voting control over trust assets in his capacity as director of Park A.Q. Pension Management and managing director of Brookside Equity Partners. John N. Irwin III holds indirect majority ownership of Park A.Q. Pension Management. The trust's governance web also includes Hillside Capital and Sherborne Holdings, which have served as lender, collateral agent, and structural counterparty in trust-related agreements. ### What is the trust's relationship to Ampex Corporation? Ampex Corporation, the once-influential magnetic recording and data storage company, established the trust to fund retirement obligations for its employees. The corporation declined substantially after the 1980s, but the trust has persisted as a separate legal entity with an independent investment program. The trust does not publicly disclose whether Ampex Corporation still maintains any operational relationship, funding obligation, or residual ownership connection to the vehicle. ### Is this an ERISA-regulated pension plan? Ampex Retirement Master Trust's reporting and disclosure posture does not match the standard profile of a single-sponsor ERISA plan. Its governance structure — layered across multiple affiliated management and lending entities — and its history as a treaty-arbitration claimant suggest a trust architecture that departs from the typical U.S. corporate defined-benefit framework. Specific regulatory filing status has not been publicly confirmed. ### Who serves as trustee for the Ampex Retirement Master Trust? Slate Street Bank & Trust has been recorded as the trustee. The exact scope of the trustee's administrative versus discretionary responsibilities is unclear from public filings, particularly given that investment voting control is exercised separately by Raymond Weldon through the affiliated management entities. ## Related profiles - [AMP Super Fund](https://altss.com/profile/amp-super-fund) - [Amphora Wealth Management](https://altss.com/profile/amphora-wealth-management) --- Source record modified: 2026-08-11T02:43:31.692Z Last verified: not supplied by this public snapshot. ## Sources and provenance Source links do not imply that every field was verified on the page modification date. See [Altss methodology](https://altss.com/methodology). Canonical page: https://altss.com/profile/ampex-retirement-master-trust Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology