# Belmont Hill School

Belmont Hill School is an Endowment / Foundation based in Belmont, United States.

## Overview

- **Organization type:** Endowment / Foundation
- **Headquarters:** Belmont, United States
- **Region:** North America
- **Address:** 350 Prospect Street, Belmont, MA 02478, United States
- **Founded:** 1923
- **Assets under management:** $100M–$150M (Altss estimate)
- **Website:** www.belmonthill.org
- **LinkedIn:** https://www.linkedin.com/school/belmont-hill-school/

## Regulatory record

- **Reports private funds:** No

## About

Belmont Hill School was founded in 1923 as an all-boys private day and five-day boarding school for grades 7 through 12. The school operates from a single campus at 350 Prospect Street in Belmont, Massachusetts, with ancillary residential property nearby. Its investment assets are held within the Belmont Hill School Endowment, which is supported by separate named funds including the Byrnes Library Endowment Fund and the Robsham Fund for the Arts. The endowment pursues a diversified asset-allocation strategy informed by the institutional investment background of its board. The school's physical plant represents significant real assets, including the Jordan Athletic Center, the Melvoin Academic Center, and the E. Paul Robsham Jr. Memorial Center for the Arts, which houses the Landau Gallery Collection. The campus also features the Sixth Form Panel Carvings, a distributed art installation. The board of trustees brings unusual institutional-investor density. President Jon Biotti is a managing director at Charlesbank Capital Partners. Vice President William Achtmeyer founded the Parthenon Group. Trustees include Stephen Karp of New England Development, Ronald Druker of The Druker Company, and Carl Martignetti of Martignetti Companies — each running substantial private enterprises. The school maintains accreditation through the Association of Independent Schools in New England and participates in the Independent School League for athletics, alongside membership in the International Boys' Schools Coalition. What distinguishes Belmont Hill structurally is not its endowment size, which a comparable school might match, but the concentration of allocator and operator talent on its board. A treasurer who formerly led asset allocation at a systematic equity firm, a trustee who runs the world's second-largest asset manager, and a trustee family that controls an NFL franchise represent a governance architecture that embeds institutional investment discipline into a secondary-school foundation. This governance layer, rather than any single strategy, shapes the endowment's posture.

## Sectors

- Education

## People

- Jon M. Biotti — President of the Board of Trustees
- William F. Achtmeyer — Vice President of the Board of Trustees
- Anthony W. Ryan — Treasurer of the Board of Trustees
- Mortimer J. Buckley III — Trustee
- Jonathan Kraft — Trustee
- Taggart M. Romney — Trustee
- Carl J. Martignetti — Trustee
- Ronald M. Druker — Trustee
- Stephen R. Karp — Trustee

## Related profiles

- [Amherst H. Wilder Foundation Retirement Plan](https://altss.com/profile/amherst-h-wilder-foundation-retirement-plan)
- [City of Southfield](https://altss.com/profile/city-of-southfield)

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Last updated: 2026-08-11T02:43:31.692Z

Canonical page: https://altss.com/profile/belmont-hill-school

Maintained by Altss — https://altss.com — methodology: https://altss.com/methodology