Boston's Reserves, and the Catch Inside Them

The Boston Symphony Orchestra, the oldest of the American 'Big Five' and long the most financially unflappable, has filed accounts that read at first like a boast and, on a second look, like a warning. For the year ending 31 August 2025 the orchestra took in a record $155 million and posted a $27 million surplus — its largest, as Slippedisc notes, since the James Levine era — while the endowment reached a new high of $603 million. Set against a field bracketed by hiring freezes and shortened seasons, Boston looks less like a peer of the New York Philharmonic than a household on higher ground while the neighbours bail out their basements.

The revealing figure is not the total but what sits inside it. An analyst's read of the filings notes that illiquid private-equity and venture partnerships now make up about a fifth of the endowment, up from six percent in 2019 — money locked away for years and subject to capital calls the orchestra cannot refuse. Since 2009, by that measure, the fund has trailed a plain index fund in all but three years.

This is the more honest portrait of institutional health: reserves ample enough to underwrite artistic risk, held in a form that quietly narrows the room to move. An endowment is a tool, not a trophy, and a tool is only worth what you can lift when you need it. Tanglewood and the commissioning budget are safe. The question the numbers put to the board is whether the fortress is being fitted with doors, or only with walls.