HRT Financial discloses 88K USO short-sale stake

United States Oil Fund, LP (USO) has a new Form 3 disclosing that HRT FINANCIAL LP is a ten percent owner.

Available on EDGAR 09/16/2026 - 03:50 PM EDT Accepted by SEC EDGAR 09/16/2026 - 03:50 PM EDT Learn about SEC filing dates

The filer has since corrected this document, so the figures below are the ones originally reported and some of them may have changed. Read the amended Form 3/A for what the company says now.

Rhea-AI Filing Summary

United States Oil Fund, LP (USO) has a new Form 3 disclosing that HRT FINANCIAL LP is a ten percent owner. HRT reports a position of 88,454 shares of common stock, reported as directly held and described in a footnote as “resulting from short sales.”

Insider Trade Summary

Holdings reported, no transactions

Holdings

Insider HRT FINANCIAL LP

Role 10% Owner

Type	Security	Shares	Price	Value
Holding	Common Stock F1	--	--	--

Holdings: Common Stock — 88,454 shares (Direct)

Footnotes (1)

1. F1. Resulting from short sales.

Key Figures

Shares reported: 88,454 shares Ownership status: Ten percent owner Transaction date: September 10, 2026 +1 more

4 metrics

Shares reported 88,454 shares Total common stock position following the reported activity, described as resulting from short sales

Ownership status Ten percent owner HRT FINANCIAL LP’s relationship to United States Oil Fund, LP on the Form 3

Transaction date September 10, 2026 Date associated with the reported holding entry for the 88,454 shares

Ownership type Direct Ownership code for the 88,454-share position in USO common stock

Key Terms

short sales, ten percent owner, Form 3

3 terms

short sales financial

"A footnote states the 88,454-share position is “resulting from short sales.”"

Short sales are trades where an investor borrows shares and sells them immediately, aiming to buy them back later at a lower price and return them to the lender; the profit is the difference if the price falls. This matters to investors because short selling can signal negative expectations about a company, add downward pressure on a stock’s price, and carries unlimited loss risk if the stock rises instead of falls—like betting a borrowed item will be cheaper to replace later.

ten percent owner regulatory

"HRT FINANCIAL LP is identified as a ten percent owner of USO."

Form 3 regulatory

"HRT FINANCIAL LP filed a Form 3 disclosing its position in USO."

Form 3 is the initial public filing that officers, directors and large shareholders must submit to report their ownership of a company’s securities when they become insiders. It acts like an opening inventory sheet that gives investors a starting point to see who holds significant stakes and to spot later trades or potential conflicts of interest, helping assess insider confidence and transparency.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What did HRT FINANCIAL LP disclose in its Form 3 for USO?

HRT FINANCIAL LP, identified as a ten percent owner of United States Oil Fund, LP (USO), disclosed a directly held position of 88,454 shares of common stock, which the filing states is “resulting from short sales.”

How many USO shares are reported by HRT FINANCIAL LP on the Form 3?

HRT FINANCIAL LP reports 88,454 shares of United States Oil Fund, LP common stock on the Form 3 as the amount held following the reported activity, with a footnote stating this position is “resulting from short sales.”

What is the nature of HRT FINANCIAL LP’s USO position?

The Form 3 states that the 88,454-share position in United States Oil Fund, LP common stock is “resulting from short sales.” This description appears in a footnote tied to the reported share amount.

Is HRT FINANCIAL LP’s ownership in USO reported as direct or indirect?

The Form 3 reports HRT FINANCIAL LP’s position in United States Oil Fund, LP as direct ownership, with the ownership code shown as direct and total shares following the reported activity of 88,454.

What date is associated with HRT FINANCIAL LP’s reported USO position?

The position of 88,454 shares of United States Oil Fund, LP common stock is tied to a transaction date of September 10, 2026 in the Form 3 data.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 3

FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0104
Estimated average burden
hours per response:			0.5

1. Name and Address of Reporting Person^*

HRT FINANCIAL LP

(Last) (First) (Middle)

3 WORLD TRADE CENTER, 175 GREENWICH STRE

76TH FLOOR

(Street)

NEW YORK NEW YORK 10007

(City) (State) (Zip)

UNITED STATES

(Country)

2. Date of Event Requiring Statement (Month/Day/Year)
09/10/2026

3. Issuer Name and Ticker or Trading Symbol
United States Oil Fund, LP [ USO ]

3a. Foreign Trading Symbol

5. If Amendment, Date of Original Filed (Month/Day/Year)

4. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)
Common Stock	88,454(1)	D

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. Resulting from short sales.

	Adam Nunes	09/16/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 5 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 3: SEC 1473 (03-26)