Funds Holding USO

Every registered fund lists what it holds each quarter. These are the ones reporting a position in USO, ordered by how much of each fund the position represents rather than by its size.

Institutional holders of USO →

Funds holding

as of 2026-07-31

Reported value

—

summed across funds

Fund families

named trusts

Largest conviction

-5.17%

of a single fund

Largest share of a fund

A small position that is a large part of its fund says more than a large one that is a rounding error.

Fund	Held	Value	Of the fund
Calamos Long/Short Equity & Dynamic Income TrustCalamos Long/Short Equity & Dynamic Income Trust-120K sh-$15.5M	-120K	-$15.5M	-5.17%
Calamos Phineus Long/Short FundCALAMOS INVESTMENT TRUST/IL-450K sh-$58.1M	-450K	-$58.1M	-5.23%

Source: quarterly NPORT-P filings, via EDGAR. Positions arrive by CUSIP; each one here has been confirmed against OpenFIGI rather than matched by name. NPORT covers mutual funds, ETFs and closed-end funds alike and does not distinguish them, and positions are as of quarter end — a fund may have sold out entirely since. The summed value counts each filing once, so two share classes of the same fund appear twice.

More on USO

Company overviewEverything on USO in one place, with the price.SEC filingsWhat USO's 8-Ks say happened: results, departures, auditor changes.Insider tradingWhat USO's own officers and directors buy and sell.Who owns itEvery manager reporting a position in USO.

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