United States Oil Fund, LP

Previous wording

USO, a Delaware limited partnership, is a commodity pool that issues shares that may be purchased and sold on the NYSE Arca. The investment objective of USO is for the daily changes in percentage terms of its shares’ per share NAV to reflect the daily changes in percentage terms of the spot price of light, sweet crude oil delivered to Cushing, Oklahoma, as measured by the daily changes in the price of the futures contract for light, sweet crude oil traded on the NYMEX that is the near month contract to expire and changes, over a ten-day period, into the NYMEX futures contract that is the next month to expire (the “Benchmark Oil Futures Contract”), plus interest earned on USO’s collateral holdings, less USO’s expenses. The change from the near month contract to the next month contract occurs at the beginning of each month and will be approximately proportional, relative to total net assets, over each day of the ten-day roll period. “Near month contract” means the next contract traded on the NYMEX due to expire. “Next month contract” means the first contract traded on the NYMEX due to expire after the near month contract. USO seeks to achieve its investment objective by investing so that the average daily percentage change in USO’s NAV for any period of 30 successive valuation days will be within plus/minus ten percent (10%) of the average daily percentage change in the price of the Benchmark Oil Futures Contract over the same period. As a result, investors should be aware that USO would meet its investment objective even if there are significant deviations between changes in its daily NAV and changes in the daily price of the Benchmark Oil Futures Contract provided that the average daily percentage change in USO’s NAV over 30 successive valuation days is within plus/minus ten percent (10%) of the average daily percentage change in the price of the Benchmark Oil Futures Contract over the same period.

Current wording

USO, a Delaware limited partnership, is a commodity pool that issues shares that may be purchased and sold on the NYSE Arca. The investment objective of USO is for the daily changes in percentage terms of its shares’ per share NAV to reflect the daily changes in percentage terms of the spot price of light, sweet crude oil delivered to Cushing, Oklahoma, as measured by the daily changes in the price of the futures contract for light, sweet crude oil traded on the NYMEX that is the near month contract to expire and changes, over a five-day period, into the NYMEX futures contract that is the next month to expire (the “Benchmark Oil Futures Contract”), plus interest earned on USO’s collateral holdings, less USO’s expenses. The change from the near month contract to the next month contract occurs at the beginning of each month and will be approximately proportional, relative to total net assets, over each day of the five-day roll period. “Near month contract” means the next contract traded on the NYMEX due to expire. “Next month contract” means the first contract traded on the NYMEX due to expire after the near month contract. USO seeks to achieve its investment objective by investing so that the average daily percentage change in USO’s NAV for any period of 30 successive valuation days will be within plus/minus ten percent (10%) of the average daily percentage change in the price of the Benchmark Oil Futures Contract over the same period. As a result, investors should be aware that USO would meet its investment objective even if there are significant deviations between changes in its daily NAV and changes in the daily price of the Benchmark Oil Futures Contract provided that the average daily percentage change in USO’s NAV over 30 successive valuation days is within plus/minus ten percent (10%) of the average daily percentage change in the price of the Benchmark Oil Futures Contract over the same period.

Previous wording

Beginning with the monthly roll in September 2023 and ending with the monthly roll in January 2024, USO transitioned its investment portfolio to primarily invest in the Benchmark Oil Futures Contract, consistent with USO’s investment strategy prior to the Spring of 2020. However, USO has had, and will continue to have, the ability to invest in Oil Futures Contracts beyond the Benchmark Oil Futures Contract and Other Oil-Related Investments, such as OTC swaps, and USO may make such investments if market conditions (including but not limited to those allowing USO to obtain greater liquidity (i.e., liquidity requirements) or to execute transactions with more favorable pricing), regulatory requirements (including, but not limited to, exchange accountability levels and position limits imposed by NYMEX as well as statutory or regulatory limits), risk mitigation measures (including those that may be taken by USO, USO’s FCMs, counterparties or other market participants), liquidity requirements, or other factors require USO to do so in order to meet its investment objective. USO may invest in Oil Futures Contracts beyond the Benchmark Oil Futures Contract, and/or Other Oil-Related Investments, as a result of, or in response to, any of the foregoing factors. In addition, USO may need to hold significant portions of its portfolio in cash beyond what it has historically held for reasons including (but not limited to) the need to address changes in market conditions, regulatory requirements or risk mitigation measures or the need to satisfy potential margin requirements.

Current wording

Following the significant market volatility that occurred in the Spring of 2020 and the market conditions, regulatory requirements and risk mitigation measures taken by USO and USO’s FCM that impacted USO as a result thereof, USO disclosed its parameters for making decisions regarding the permitted investments USO would hold, including the intended order of priority in selecting investments and the type of investments to be held in its portfolio. Beginning with the monthly roll in September 2023 and ending with the monthly roll in January 2024, USO transitioned its investment portfolio to primarily invest in the Benchmark Oil Futures Contract, consistent with USO’s investment strategy prior to the Spring of 2020. However, USO has had, and will continue to have, the ability to invest in Oil Futures Contracts beyond the Benchmark Oil Futures Contract and Other Oil-Related Investments, such as OTC swaps, and USO may make such investments if market conditions (including but not limited to those allowing USO to obtain greater liquidity (i.e., liquidity requirements) or to execute transactions with more favorable pricing), regulatory requirements (including, but not limited to, exchange accountability levels and position limits imposed by NYMEX as well as statutory or regulatory limits), risk mitigation measures (including those that may be taken by USO, USO’s FCMs, counterparties or other market participants), liquidity requirements, or other factors require USO to do so in order to meet its investment objective. USO may invest in Oil Futures Contracts beyond the Benchmark Oil Futures Contract, and/or Other Oil-Related Investments, as a result of, or in response to, any of the foregoing factors. In addition, USO may need to hold significant portions of its portfolio in cash beyond what it has historically held for reasons including (but not limited to) the need to address changes in market conditions, regulatory requirements or risk mitigation measures or the need to satisfy potential margin requirements.

Previous wording

Exchange Accountability Levels, Position Limits and Price Fluctuation Limits. Designated contract markets (“DCMs”), such as the NYMEX and ICE Futures, have established accountability levels and position limits on the maximum net long or net short futures contracts in commodity interests that any person or group of persons under common trading control (other than as a hedge, which an investment by USO is not) may hold, own or control. These levels and position limits apply to the futures contracts that USO invests in to meet its investment objective. In addition to accountability levels and position limits, the NYMEX and ICE Futures may also set daily price fluctuation limits on futures contracts. The daily price fluctuation limit establishes the maximum amount that the price of a futures contract may vary either up or down from the previous day’s settlement price. Once the daily price fluctuation limit has been reached in a particular futures contract, no trades may be made at a price beyond that limit.

Current wording

Exchange Accountability Levels, Position Limits and Price Fluctuation Limits. Designated contract markets (“DCMs”), such as the NYMEX and ICE Futures, have established accountability levels and position limits on the maximum net long or net short futures contracts in commodity interests that any person or group of persons under common trading control (other than as a hedge, which an investment by USO is not) may hold, own or control. These levels and position limits apply to the futures contracts that USO invests in to meet its investment objective. In addition to accountability levels and position limits, the NYMEX and ICE Futures also set daily price fluctuation limits on futures contracts. The daily price fluctuation limit establishes the maximum amount that the price of a futures contract may vary either up or down from the previous day’s settlement price. Once the daily price fluctuation limit has been reached in a particular futures contract, no trades may be made at a price beyond that limit.

Previous wording

The accountability levels for the Benchmark Oil Futures Contract and other Oil Futures Contracts traded on U.S.-based futures exchanges, such as the NYMEX, are not a fixed ceiling, but rather a threshold above which the NYMEX may exercise greater scrutiny and control over an investor’s positions. The current accountability level for investments for any one month in the Benchmark Oil Futures Contract is 10,000 contracts. In addition, the NYMEX imposes an accountability level for all months of 20,000 net futures contracts for light, sweet crude oil. In addition, the ICE Futures maintains the same accountability levels, position limits and monitoring authority for its futures contracts for light, sweet crude oil contract as the NYMEX. If USO and the Related Public Funds exceed these accountability levels for investments in the futures contracts for light, sweet crude oil, the NYMEX and ICE Futures will monitor such exposure and may ask for further information on USO’s and the Related Public Funds’ activities including the total size of all positions, investment and trading strategy, and the extent of liquidity resources of USO and the Related Public Funds. If deemed necessary by the NYMEX and/or ICE Futures, USO could be required to reduce its aggregate position in Crude Oil Futures CL contracts back to the 10,000 single month and/or 20,000 all month accountability level. As of September 30, 2025, USO held 11,962 NYMEX WTI Crude Oil Futures CL contracts and did not hold any ICE WTI Crude Oil Futures contracts. USO exceeded accountability levels of the NYMEX during the nine months ended September 30, 2025, including when it held a maximum of 16,232 Crude Oil Futures CL contracts on the NYMEX, exceeding the “any” month limit. No action was taken by the NYMEX and USO did not have to reduce the number of positions held.

Current wording

The accountability levels for the Benchmark Oil Futures Contract and other Oil Futures Contracts traded on U.S.-based futures exchanges, such as the NYMEX, are not a fixed ceiling, but rather a threshold above which the NYMEX may exercise greater scrutiny and control over an investor’s positions. The current accountability level for investments for any one month in the Benchmark Oil Futures Contract is 10,000 contracts. In addition, the NYMEX imposes an accountability level for all months of 20,000 net futures contracts for light, sweet crude oil. In addition, the ICE Futures maintains the same accountability levels, position limits and monitoring authority for its futures contracts for light, sweet crude oil contract as the NYMEX. If USO and the Related Public Funds exceed these accountability levels for investments in the futures contracts for light, sweet crude oil, the NYMEX and ICE Futures will monitor such exposure and may ask for further information on USO’s and the Related Public Funds’ activities including the total size of all positions, investment and trading strategy, and the extent of liquidity resources of USO and the Related Public Funds. If deemed necessary by the NYMEX and/or ICE Futures, USO could be required to reduce its aggregate position in Crude Oil Futures CL contracts back to the 10,000 single month and/or 20,000 all month accountability level. As of March 31, 2026, USO held 23,766 NYMEX WTI Crude Oil Futures CL contracts and did not hold any ICE WTI Crude Oil Futures contracts. USO exceeded accountability levels of the NYMEX during the three months ended March 31, 2026, including when it held a maximum of 26,969 Crude Oil Futures CL contracts on the NYMEX, exceeding the “any one” month limit. No action was taken by the NYMEX and USO did not have to reduce the number of positions held.

Previous wording

Position limits differ from accountability levels in that they represent fixed limits on the maximum number of futures contracts that any person may hold and cannot allow such limits to be exceeded without express CFTC authority to do so. In addition to accountability levels and position limits that may apply at any time, the NYMEX and ICE Futures impose position limits on contracts held in the last few days of trading in the near month contract to expire. Investors should note that the foregoing accountability levels and position limits are subject to change, which in turn could change the amount and type of permitted investments in which USO invests. For the nine months ended September 30, 2025, USO did not exceed any position limits imposed by the NYMEX and ICE Futures. The foregoing accountability levels and position limits are subject to change. Due to evolving market conditions, remaining within relevant accountability levels and position limits, and, any additional or different risk mitigation measures taken by USO’s FCMs in the future with respect to USO acquiring additional Oil Futures contracts, USO has invested and intends to invest in other permitted investments, beyond the Benchmark Oil Futures Contract.

Current wording

Position limits differ from accountability levels in that they represent fixed limits on the maximum number of futures contracts that any person may hold and cannot allow such limits to be exceeded without express CFTC authority to do so. In addition to accountability levels and position limits that may apply at any time, the NYMEX and ICE Futures impose position limits on contracts held in the last few days of trading in the near month contract to expire. Investors should note that the foregoing accountability levels and position limits are subject to change, which in turn could change the amount and type of permitted investments in which USO invests. For the three months ended March 31, 2026, USO did not exceed any position limits imposed by the NYMEX and ICE Futures. The foregoing accountability levels and position limits are subject to change. Due to evolving market conditions, remaining within relevant accountability levels and position limits, and, any additional or different risk mitigation measures taken by USO’s FCMs in the future with respect to USO acquiring additional Oil Futures contracts, USO has invested and intends to invest in other permitted investments, beyond the Benchmark Oil Futures Contract.

Previous wording

Position limits may potentially cause a tracking error between the price of USO’s shares and the price of the Benchmark Oil Futures Contract. This may in turn prevent investors from being able to effectively use USO as a way to hedge against crude oil related losses or as a way to indirectly invest in crude oil.

Current wording

All of these limits may potentially cause a tracking error between the price of USO’s shares and the price of the Benchmark Oil Futures Contract. This may in turn prevent investors from being able to effectively use USO as a way to hedge against crude oil related losses or as a way to indirectly invest in crude oil.

Previous wording

Rules put in place by U.S. federal banking regulators, the CFTC and the SEC require the daily exchange of variation margin and initial margin for swaps between swap dealers, major swap participants, security-based swap dealers, and major security-based swap participants (“Swap Entities”) and swaps between Swap Entities and their counterparties that are “financial end-users” (such rules, the “Margin Rules”). The Margin Rules require Swap Entities to exchange variation margin with all of their counterparties who are financial end-users. The minimum variation margin amount is the daily mark-to-market change in the value of the swap, taking into account the

Current wording

Rules put in place by U.S. federal banking regulators, the CFTC and the SEC require the daily exchange of variation margin and initial margin for swaps between swap dealers, major swap participants, security-based swap dealers, and major security-based swap participants (“Swap Entities”) and swaps between Swap Entities and their counterparties that are “financial end-users” (such rules, the “Margin Rules”). The Margin Rules require Swap Entities to exchange variation margin with all of their counterparties who are financial end-users. The minimum variation margin amount is the daily mark-to-market change in the value of the swap, taking into account the amount of variation margin previously posted or collected. Swap Entities are required to exchange initial margin with their financial end-users who have “material swaps exposure” (i.e., an average daily aggregate notional of $8 billion or more in non-cleared swaps calculated in accordance with the Margin Rules). The Margin Rules specify the types of collateral that may be posted or collected as initial margin or variation margin (generally cash, certain government, government-sponsored enterprise securities, certain liquid debt, certain equity securities, certain eligible publicly traded debt, and gold) and sets forth haircuts for certain collateral asset classes.

Previous wording

and acts of terrorism, can also, directly or indirectly, negatively impact, and/or cause volatility in, the price of commodities such as crude oil and the value, pricing, and liquidity of the investments or other assets held by USO. A negative impact on, or volatility in, the price of crude oil or the value, pricing and liquidity of USO’s investments or other assets resulting from the occurrence of any of the aforementioned events, or similar events, could cause you to lose all, or substantially all, of your investment in USO.

Current wording

Geopolitical conflict, including war and armed conflicts (such as the Russia-Ukraine war, military conflicts in the Middle East, and the expansion of such conflicts in surrounding areas), sanctions, the introduction of or changes in tariffs or trade barriers, global or local recessions, and acts of terrorism, can also, directly or indirectly, negatively impact, and/or cause volatility in, the price of commodities such as crude oil and the value, pricing, and liquidity of the investments or other assets held by USO. A negative impact on, or volatility in, the price of crude oil or the value, pricing and liquidity of USO’s investments or other assets resulting from the occurrence of any of the aforementioned events, or similar events, could cause you to lose all, or substantially all, of your investment in USO.

Previous wording

Inflation is a general increase in the overall price level of goods and services in the economy. The United States Federal Reserve has a stated goal of maintaining a two percent increase in inflation over the long run, as measured by the annual change in the price index for personal consumption expenditures. Following the COVID-19 pandemic, the United States experienced inflation above the Federal Reserve’s stated two percent goal. Other world economies similarly experienced elevated inflation rates. The Federal Reserve increased interest rates and successfully reduced inflation so that it is close to the stated two percent goal. As a result, in 2024, the Federal Reserve began reducing interest rates. However, the rate of inflation in the United States is still above the stated two percent goal. Inflation has the effect of eroding the value of cash or bonds. In a high inflation environment, the value of USO’s cash and Treasury investments may decline.

Current wording

Inflation is a general increase in the overall price level of goods and services in the economy. The United States Federal Reserve has a stated goal of maintaining a two percent increase in inflation over the long run, as measured by the annual change in the price index for personal consumption expenditures. Inflation has the effect of eroding the value of cash or bonds. In a high inflation environment, the value of USO’s cash and Treasury investments may decline.

Previous wording

Crude oil futures prices were volatile during the nine months ended September 30, 2025. The price of the Benchmark Oil Futures Contract started the period at $71.72 per barrel. The high of the period was on January 15, 2025 when the price reached $78.84 per barrel. The low of the period was on May 5, 2025 when the price dropped to $57.05 per barrel. The period ended with the Benchmark Oil Futures Contract at $62.37 per barrel, a decrease of approximately (13.04)% over the period. USO’s per share NAV began the period at $75.45 and ended the period at $73.58 on September 30, 2025, a decrease of approximately (2.48)% over the period. The Benchmark Oil Futures Contract prices listed above began with the February 2025 contracts and ended with the November 2025 contracts. The decrease of approximately (13.04)% on the Benchmark Oil Futures Contract listed above is a hypothetical return only and would not actually be realized by an investor holding Oil Futures Contracts. An investment in Oil Futures Contracts would need to be rolled forward during the time period described in order to simulate such a result. Furthermore, the change in the nominal price of these differing Oil Futures Contracts, measured from the start of the year to the end of the year, does not represent the actual benchmark results that USO seeks to track, which are more fully described below in the section titled “Tracking USO’s Benchmark.”

Current wording

Crude oil futures prices were volatile during the three months ended March 31, 2026. The price of the Benchmark Oil Futures Contract started the period at $57.42 per barrel. The high of the period was on March 30, 2026 when the price reached $102.88 per barrel. The low of the period was on January 7, 2026 when the price dropped to $55.94 per barrel. The period ended with the Benchmark Oil Futures Contract at $101.38 per barrel, an increase of approximately 76.56% over the period. USO’s per share NAV began the period at $69.10 and ended the period at $126.39 on March 31, 2026, an increase of approximately 82.91% over the period. The Benchmark Oil Futures Contract prices listed above began with the February 2026 contracts and ended with the May 2026 contracts. The increase of approximately 76.56% on the Benchmark Oil Futures Contract listed above is a hypothetical return only and could not actually be achieved by an investor holding Oil Futures Contracts. An investment in Oil Futures Contracts would need to be rolled forward during the time period described in order to simulate such a result. Furthermore, the change in the nominal price of these differing Oil Futures Contracts, measured from the start of the year to the end of the year, does not represent the actual benchmark results that USO seeks to track, which are more fully described below in the section titled “Tracking USO’s Benchmark.”

Previous wording

During the nine months ended September 30, 2025, the crude oil futures market experienced states of mild contango. On days when the market was in contango the price of the near month crude Oil Futures Contract was lower than the price of the next month crude Oil Futures Contract, or contracts further away from expiration. On days when the market was in backwardation, the price of the near month crude Oil Futures Contract was higher than the price of the next month crude Oil Futures Contract or contracts further away from expiration. For a discussion of the impact of backwardation and contango on total returns, see “Term Structure of Crude Oil Prices and the Impact on Total Returns” below.

Current wording

During the three months ended March 31, 2026, the crude oil futures market was in a state of backwardation. On days when the market was in contango the price of the near month crude Oil Futures Contract was lower than the price of the next month crude Oil Futures Contract, or contracts further away from expiration. On days when the market was in backwardation, the price of the near month crude Oil Futures Contract was higher than the price of the next month crude Oil Futures Contract or contracts further away from expiration. For a discussion of the impact of backwardation and contango on total returns, see “Term Structure of Crude Oil Prices and the Impact on Total Returns” below.

Previous wording

As of September 30, 2025, USO had 12,023,603 shares outstanding. On August 29, 2023, the SEC declared effective a registration statement filed by USO that registered an unlimited number of shares. As a result, USO has an unlimited number of shares that can be issued in the form of Creation Baskets. More shares may have been issued by USO than are outstanding due to the redemption of shares.

Current wording

As of March 31, 2026, USO had 20,923,603 shares outstanding. On August 29, 2023, the SEC declared effective a registration statement filed by USO that registered an unlimited number of shares. As a result, USO has an unlimited number of shares that can be issued in the form of Creation Baskets. More shares may have been issued by USO than are outstanding due to the redemption of shares.

Previous wording

The decrease in total fees and other expenses excluding management fees for the three months ended September 30, 2025, compared to the three months ended September 30, 2024, was due primarily to a decrease in tax reporting and professional fees.

Current wording

The increase in total fees and other expenses excluding management fees for the three months ended March 31, 2026, compared to the three months ended March 31, 2025, was due primarily to an increase in commissions expense.

Previous wording

The increase in total commissions accrued to brokers for the nine months ended September 30, 2025, compared to the nine months ended September 30, 2024, was due primarily to a higher number of Oil Futures Contracts being held and traded.

Current wording

The increase in total commissions accrued to brokers for the three months ended March 31, 2026, compared to the three months ended March 31, 2025, was due primarily to a higher number of Oil Futures Contracts being held and traded.

Previous wording

For the 30-valuation days ended September 30, 2025, the average daily change in the Benchmark Oil Futures Contract was 0.015%, while the average daily change in the per share NAV of USO over the same time period was 0.027%. The average daily difference was 0.012% (or 1.2 basis points, where 1 basis point equals 1/100 of 1%), meaning that over this time period USO’s NAV performed within the plus or minus 10% range established as its benchmark tracking goal.

Current wording

For the 30-valuation days ended March 31, 2026, the average daily change in the Benchmark Oil Futures Contract was 1.822%, while the average daily change in the per share NAV of USO over the same time period was 1.832%. The average daily difference was 0.010%% (or 1.0 basis points, where 1 basis point equals 1/100 of 1%), meaning that over this time period USO’s NAV performed within the plus or minus 10% range established as its benchmark tracking goal.

Previous wording

Since the commencement of the offering of USO’s shares to the public on April 10, 2006 to September 30, 2025, the average daily change in the Benchmark Oil Futures Contract was 0.002%, while the average daily change in the per share NAV of USO over the same time period was (0.009)%. The average daily difference was (0.011)% (or (1.1) basis points, where 1 basis point equals 1/100 of 1%), meaning that over this time period USO’s NAV performed within the plus or minus 10% range established as its benchmark tracking goal.

Current wording

Since the commencement of the offering of USO’s shares to the public on April 10, 2006 to March 31, 2026, the average daily change in the Benchmark Oil Futures Contract was 0.014%, while the average daily change in the per share NAV of USO over the same time period was 0.003%. The average daily difference was 0.011% (or 1.1 basis points, where 1 basis point equals 1/100 of 1%), meaning that over this time period USO’s NAV performed within the plus or minus 10% range established as its benchmark tracking goal.

Previous wording

For the nine months ended September 30, 2025, the actual total return of USO as measured by changes in its per share NAV was (2.48)%. This is based on an initial per share NAV of $75.45 as of December 31, 2024 and an ending per share NAV as of September 30, 2025 of $73.58. During this time period, USO made no distributions to its shareholders. However, if USO’s daily changes in its per share NAV had instead exactly tracked the changes in the daily total return of the Benchmark Oil Futures Contract, USO would have had an estimated per share NAV of $71.34 as of September 30, 2025, for a total return over the relevant time period of (5.44)%. The difference between the actual per share NAV total return of USO of (2.48)% and the expected total return based on the Benchmark Oil Futures Contract of (5.44)% was a difference over the time period of 2.96%, which is to say that USO’s actual total return outperformed its benchmark by that percentage. USO incurs expenses primarily composed of the management fee, brokerage commissions for the buying and selling of futures contracts, and other expenses. The impact of these expenses, offset by interest and dividend income, and net of positive or negative execution, and net the difference in returns between USO’s current holdings and the Benchmark Oil Futures Contract tend to cause daily changes in the per share NAV of USO to track slightly higher than daily changes in the price of the Benchmark Oil Futures Contract.

Current wording

For the three months ended March 31, 2026, the actual total return of USO as measured by changes in its per share NAV was 82.91%. This is based on an initial per share NAV of $69.10 as of December 31, 2025 and an ending per share NAV as of March 31, 2026 of $126.39. During this time period, USO made no distributions to its shareholders. However, if USO’s daily changes in its per share NAV had instead exactly tracked the changes in the daily total return of the Benchmark Oil Futures Contract, USO would have had an estimated per share NAV of $125.62 as of March 31, 2026, for a total return over the relevant time period of 81.80%. The difference between the actual per share NAV total return of USO of 82.91% and the expected total return based on the Benchmark Oil Futures Contract of 81.80% was a difference over the time period of 1.11%, which is to say that USO’s actual total return outperformed its benchmark by that percentage. USO incurs expenses primarily composed of the management fee, brokerage commissions for the buying and selling of futures contracts, and other expenses. The impact of these expenses, offset by interest and dividend income, and net of positive or negative execution, and net the difference in returns between USO’s current holdings and the Benchmark Oil Futures contract tended to cause daily changes in the per share NAV of USO to track slightly higher/lower than daily changes in the price of the Benchmark Oil Futures Contract.

Previous wording

By comparison, for the nine months ended September 30, 2024, the actual total return of USO as measured by changes in its per share NAV was 4.41%. This is based on an initial per share NAV of $66.91 as of December 31, 2023 and an ending per share NAV as of September 30, 2024 of $69.86. During this time period, USO made no distributions to its shareholders. However, if USO’s daily changes in its per share NAV had instead exactly tracked the changes in the daily total return of the Benchmark Oil Futures Contract, USO would have had an estimated per share NAV of $67.81 as of September 30, 2024, for a total return over the relevant time period of 1.35%. The difference between the actual per share NAV total return of USO of 4.41% and the expected total return based on the Benchmark Oil Futures Contract of 1.35% was a difference over the time period of 3.06%, which is to say that USO’s actual total return outperformed its benchmark by that percentage. USO incurs expenses primarily composed of the management fee, brokerage commissions for the buying and selling of futures contracts, and other expenses. The impact of these expenses, offset by interest and dividend income, and net of positive or negative execution, and net the difference in returns between USO’s current holdings and the Benchmark Oil Futures Contract tend to cause daily changes in the per share NAV of USO to track slightly higher or lower than daily changes in the price of the Benchmark Oil Futures Contract.

Current wording

By comparison, for the three months ended March 31, 2025, the actual total return of USO as measured by changes in its per share NAV was 2.52%. This is based on an initial per share NAV of $75.45 as of December 31, 2024 and an ending per share NAV as of March 31, 2025 of $77.35. During this time period, USO made no distributions to its shareholders. However, if USO’s daily changes in its per share NAV had instead exactly tracked the changes in the daily total return of the Benchmark Oil Futures Contract, USO would have had an estimated per share NAV of $76.16 as of March 31, 2025, for a total return over the relevant time period of 0.94%. The difference between the actual per share NAV total return of USO of 2.52% and the expected total return based on the Benchmark Oil Futures Contract of 0.94% was a difference over the time period of 1.58%, which is to say that USO’s actual total return outperformed its benchmark by that percentage. USO incurs expenses primarily composed of the management fee, brokerage commissions for the buying and selling of futures contracts, and other expenses. The impact of these expenses, offset by interest and dividend income, and net of positive or negative execution, and net the difference in returns between USO’s current holdings and the Benchmark Oil Futures Contract tend to cause daily changes in the per share NAV of USO to track slightly lower or higher than daily changes in the price of the Benchmark Oil Futures Contract.

Previous wording

During the third quarter of 2025 the rolling 30 day average daily difference between the return of USO’s NAV and the Benchmark Oil Futures Contract was (0.01)% or (1.0) basis points).

Current wording

During the first quarter of 2026 the rolling 30 day average daily difference between the return of USO’s NAV and the Benchmark Oil Futures Contract was 0.010% or 1.0 basis points)

Previous wording

First, USO may buy or sell its holdings in the then current Benchmark Oil Futures Contract at a price other than the settlement price of that contract on the day during which USO executes the trade. In that case, USO may pay a price that is higher or lower, than the closing settlement price of the Benchmark Oil Futures Contract, which could cause the changes in the daily per share NAV of USO to either be higher or lower relative to the daily changes in the Benchmark Oil Futures Contract. During the nine months ended September 30, 2025, USCF attempted to minimize the effect of these transactions by seeking to execute its purchase or sale of Oil Futures Contracts at, or as close as possible to, the end of the day settlement price. However, it may not always be possible for USO to obtain the settlement price and there is no assurance that failure to obtain the closing settlement price in the future will not adversely impact USO’s attempt to track the Benchmark Oil Futures Contract.

Current wording

First, USO may buy or sell its holdings in the then current Benchmark Oil Futures Contract at a price other than the settlement price of that contract on the day during which USO executes the trade. In that case, USO may pay a price that is higher or lower, than the closing settlement price of the Benchmark Oil Futures Contract, which could cause the changes in the daily per share NAV of USO to either be higher or lower relative to the daily changes in the Benchmark Oil Futures Contract. During the three months ended March 31, 2026, USCF attempted to minimize the effect of these transactions by seeking to execute its purchase or sale of Oil Futures Contracts at, or as close as possible to, the end of the day settlement price. However, it may not always be possible for USO to obtain the settlement price and there is no assurance that failure to obtain the closing settlement price in the future will not adversely impact USO’s attempt to track the Benchmark Oil Futures Contract.

Previous wording

Second, USO incurs expenses primarily composed of the management fee, brokerage commissions for the buying and selling of futures contracts, and other expenses. The impact of these expenses tends to cause daily changes in the per share NAV of USO to track slightly lower than daily changes in the price of the Benchmark Oil Futures Contract. At the same time, USO earns dividend and interest income on its cash, cash equivalents and Treasuries. USO is not required to distribute any portion of its income to its shareholders and did not make any distributions to shareholders during the nine months ended September 30, 2025. Interest payments, and any other income, were retained within the portfolio and added to USO’s NAV. When this income exceeds the level of USO’s expenses for its management fee, brokerage commissions and other expenses (including ongoing registration fees, licensing fees and the fees and expenses of the independent directors of USCF), USO will realize a net yield that will tend to cause daily changes in the per share NAV of USO to track slightly higher than daily changes in the Benchmark Oil Futures Contract. If short-term interest rates rise above these levels, the level of deviation created by the yield would increase. Conversely, if short-term interest rates were to decline, the amount of error created by the yield would decrease. When short-term yields drop to a level lower than the combined expenses of the management fee and the brokerage commissions, then the tracking error becomes a negative number and would tend to cause the daily returns of the per share NAV to underperform the daily returns of the Benchmark Oil Futures Contract. USCF anticipates that interest rates may continue to stagnate over the near future. It is anticipated that fees and expenses paid by USO may continue to be lower than interest earned by USO. As such, USCF anticipates that USO could possibly outperform its benchmark so long as interest earned is greater than the fees and expenses paid by USO.

Current wording

Second, USO incurs expenses primarily composed of the management fee, brokerage commissions for the buying and selling of futures contracts, and other expenses. The impact of these expenses tends to cause daily changes in the per share NAV of USO to track slightly lower than daily changes in the price of the Benchmark Oil Futures Contract. At the same time, USO earns dividend and interest income on its cash, cash equivalents and Treasuries. USO is not required to distribute any portion of its income to its shareholders and did not make any distributions to shareholders during the three months ended March 31, 2026. Interest payments, and any other income, were retained within the portfolio and added to USO’s NAV. When this income exceeds the level of USO’s expenses for its management fee, brokerage commissions and other expenses (including ongoing registration fees, licensing fees and the fees and expenses of the independent directors of USCF), USO will realize a net yield that will tend to cause daily changes in the per share NAV of USO to track slightly higher than daily changes in the Benchmark Oil Futures Contract. If short-term interest rates rise above these levels, the level of deviation created by the yield would increase. Conversely, if short-term interest rates were to decline, the amount of error created by the yield would decrease. When short-term yields drop to a level lower than the combined expenses of the management fee and the brokerage commissions, then the tracking error becomes a negative number and would tend to cause the daily returns of the per share NAV to underperform the daily returns of the Benchmark Oil Futures Contract. USCF anticipates that interest rates may continue to stagnate over the near future. It is anticipated that fees and expenses paid by USO may continue to be lower than interest earned by USO. As such, USCF anticipates that USO could possibly outperform its benchmark so long as interest earned is greater than the fees and expenses paid by USO.

Previous wording

Third, USO may hold Other Oil-Related Investments in its portfolio that may fail to closely track the Benchmark Oil Futures Contract’s total return movements. In that case, the error in tracking the Benchmark Oil Futures Contract could result in daily changes in the per share NAV of USO that are either too high, or too low, relative to the daily changes in the Benchmark Oil Futures Contract. During the nine months ended September 30, 2025, USO held OTC swaps, which are considered Other Oil-Related Investments. If USO increases in size, and due to its obligations to comply with market conditions, regulatory limits, and risk mitigation measures imposed by its

Current wording

Third, USO may hold Other Oil-Related Investments in its portfolio that may fail to closely track the Benchmark Oil Futures Contract’s total return movements. In that case, the error in tracking the Benchmark Oil Futures Contract could result in daily changes in the per share NAV of USO that are either too high, or too low, relative to the daily changes in the Benchmark Oil Futures Contract. During the three months ended March 31, 2026, USO held OTC swaps, which are considered Other Oil-Related Investments. If USO increases in size, and due to its obligations to comply with market conditions, regulatory limits, and risk mitigation measures imposed by its FCMs, USO may invest in additional Other Oil-Related Investments, such as OTC swaps, which may have the effect of increasing transaction related expenses and may result in increased tracking error. OTC swaps increase transaction-related expenses due to the fact that USO must pay to the swap counterparty certain fees that USO does not have to pay for transactions executed on an exchange.

Previous wording

The chart below compares the daily price of the near month crude oil futures contract to the price of the 13 th month crude oil futures contract (i.e., a contract one year forward) over the last 10 years. When the price of the near month futures contract is higher than the price of the 13 th month futures contract, the market would be described as being in backwardation. When the price of the near month futures contract is lower than the 13 th month futures contract, the market would be described as being in contango. Although the price of the near month futures contract and the price of the 13 th month futures contract tend to move together, it can be seen that at times the

Current wording

The chart below compares the daily price of the near month crude oil futures contract to the price of the 13 th month crude oil futures contract (i.e., a contract one year forward) over the last 10 years. When the price of the near month futures contract is higher than the price of the 13 th month futures contract, the market would be described as being in backwardation. When the price of the near month futures contract is lower than the 13 th month futures contract, the market would be described as being in contango. Although the price of the near month futures contract and the price of the 13 th month futures contract tend to move together, it can be seen that at times the near month futures contract prices are higher than the 13 th month futures contract prices (backwardation) and, at other times, the near month futures contract prices are lower than the 13 th month futures contract prices (contango).

Previous wording

Historically, the crude oil futures markets have experienced periods of contango and backwardation, with backwardation being in place somewhat less often than contango since oil futures trading started in 1983. Following the global financial crisis in the fourth quarter of 2008, the crude oil market moved into contango and remained primarily in contango until 2013. In 2014, global crude oil inventories grew rapidly after the Organization of the Petroleum Exporting Countries (“OPEC”) voted to defend its market share against U.S. shale-oil producers, resulting in another period during which the crude oil market remained primarily in contango. This period of contango continued through December 31, 2017. Declining global crude oil inventories caused the market to flip into backwardation at the beginning of 2018 through late October 2018, at which point ongoing supply growth in the U.S., combined with increased OPEC production, once again led market participants to fear another global glut of crude oil. The crude oil market was primarily in contango the first half of 2019 and in backwardation during the second half of 2019. Crude oil flipped back into contango in January 2020 and remained predominantly in contango throughout 2020.

Current wording

Historically, the crude oil futures markets have experienced periods of contango and backwardation, with backwardation being in place somewhat less often than contango since oil futures trading started in 1983. Following the global financial crisis in the fourth quarter of 2008, the crude oil market moved into contango and remained primarily in contango until 2013. In 2014, global crude oil inventories grew rapidly after the Organization of the Petroleum Exporting Countries (“OPEC”) voted to defend its market share against U.S. shale-oil producers, resulting in another period during which the crude oil market remained primarily in contango. This period of contango continued through December 31, 2017. Declining global crude oil inventories caused the market to flip into backwardation at the beginning of 2018 through late October 2018, at which point ongoing supply growth in the U.S., combined with increased OPEC production, once again led market participants to fear another global glut of crude oil. The crude oil market was primarily in contango the first half of 2019 and in backwardation during the second half of 2019. Crude oil flipped back into contango in January 2020.

Previous wording

the COVID-19 demand shock, which reduced global petroleum consumption, and the price war launched by Saudi Arabia at the beginning of March 2020 in response to Russia’s unwillingness to participate in extending previously agreed upon supply cuts. An estimated twenty million barrels a day of crude demand evaporated as a result of quarantines and massive drops in industrial and manufacturing activity. Eventually, the United States, OPEC, Russia, and other oil producers around the world agreed to a historic 9.7 million barrel per day cut to crude supply. The supply cut along with the partial reopening of economies during the third quarter of 2020 reduced some of the unprecedented volatility that oil markets experienced in the Spring of 2020.

Current wording

In March 2020, contango dramatically increased and reached historic levels during the economic crisis arising from the COVID-19 pandemic, related supply chain disruptions and ongoing disputes among oil producing countries. This level of contango was due to significant market volatility that occurred in crude oil markets as well as oil futures markets. Crude oil prices collapsed in the wake of the COVID-19 demand shock, which reduced global petroleum consumption, and the price war launched by Saudi Arabia at the beginning of March 2020 in response to Russia’s unwillingness to participate in extending previously agreed upon supply cuts. An estimated twenty million barrels a day of crude demand evaporated as a result of quarantines and massive drops in industrial and manufacturing activity. Eventually, the United States, OPEC, Russia, and other oil producers around the world agreed to a historic 9.7 million barrel per day cut to crude supply. The supply cut along with the partial reopening of economies during the third quarter of 2020 reduced some of the unprecedented volatility that oil markets experienced in the Spring of 2020.

Previous wording

As a result of market and regulatory conditions, including significant market volatility, large numbers of USO shares purchased during a short period of time, applicable regulatory accountability levels and position limits on oil futures contracts and risk mitigation measures that were taken by USO and USO’s FCM in 2020, USO invested in Oil Futures Contracts with expiration dates for months later than that of the Benchmark Oil Futures Contract. Holdings in later month contracts will typically cause USO to experience lesser effects from contango and backwardation than would be the case if USO’s holdings were primarily in oil futures contracts in the first month or second month. Beginning with the monthly roll in September 2023 and ending with the monthly roll in January 2024, USO transitioned its investment portfolio to primarily invest in the Benchmark Oil Futures Contract, consistent with USO’s investment strategy prior to the Spring of 2020. However, USO has had, and will continue to have, the ability to invest in Oil Futures Contracts beyond the Benchmark Oil Futures Contract and Other Oil-Related Investments, such as OTC swaps, and USO may make such investments if market conditions (including but not limited to those allowing USO to obtain greater liquidity (i.e., liquidity requirements) or to execute transactions with more favorable pricing), regulatory requirements (including, but not limited to, exchange accountability levels and position limits imposed by NYMEX as well as statutory or regulatory limits), risk mitigation measures (including those that may be taken by USO, USO’s FCMs, counterparties or other market participants), liquidity requirements, or other factors require USO to do so in order to meet its investment objective. USO may invest in Oil Futures Contracts beyond the Benchmark Oil Futures Contract, and/or Other Oil-Related Investments, as a result of, or in response to, any of the foregoing factors. In addition, USO may need to hold significant portions of its portfolio in cash beyond what it has historically held for reasons including (but not limited to) the need to address the changes in market conditions, regulatory requirements or risk mitigation measures or the need to satisfy potential margin requirements.

Current wording

Beginning with the monthly roll in September 2023 and ending with the monthly roll in January 2024, USO transitioned its investment portfolio to primarily invest in the Benchmark Oil Futures Contract, consistent with USO’s investment strategy prior to the Spring of 2020. However, USO has had, and will continue to have, the ability to invest in Oil Futures Contracts beyond the Benchmark Oil Futures Contract and Other Oil-Related Investments, such as OTC swaps, and USO may make such investments if market conditions (including but not limited to those allowing USO to obtain greater liquidity (i.e., liquidity requirements) or to execute transactions with more favorable pricing), regulatory requirements (including, but not limited to, exchange accountability levels and position limits imposed by NYMEX as well as statutory or regulatory limits), risk mitigation measures (including those that may be taken by USO, USO’s FCMs, counterparties or other market participants), liquidity requirements, or other factors require USO to do so in order to meet its investment objective. USO may invest in Oil Futures Contracts beyond the Benchmark Oil Futures Contract, and/or Other Oil-Related Investments, as a result of, or in response to, any of the foregoing factors. In addition, USO may need to hold significant portions of its portfolio in cash beyond what it has historically held for reasons including (but not limited to) the need to address the changes in market conditions, regulatory requirements or risk mitigation measures or the need to satisfy potential margin requirements.

Previous wording

During the twelve months ended December 31, 2020, the crude oil futures market spent time in both a state of contango and backwardation as measured by the difference between the front month and the second month contract, whereas the crude oil futures market has primarily been in a state of backwardation since 2021 as measured by the difference between the front month and the second month contract.

Current wording

During the three months ended March 31, 2026, the crude oil futures market was in a state of backwardation.

Previous wording

Crude Oil Market. During the nine months ended September 30, 2025, the price of the front month WTI crude oil futures contract traded in a range between $57.13 to $80.04. Prices decreased (13.04)% from December 31, 2024 through September 30, 2025, finishing the quarter at $62.37.

Current wording

Crude Oil Market. During the three months ended March 31, 2026, the price of the front month WTI crude oil futures contract traded in a range between $55.99 to $102.88. Prices increased 76.56% from December 31, 2025 through March 31, 2026, finishing the quarter at $101.38.

Previous wording

USO currently generates cash primarily from: (i) the sale of baskets consisting of 100,000 shares (“Creation Baskets”) and (ii) income earned on Treasuries, cash and/or cash equivalents. USO has allocated substantially all of its net assets to trading in Oil Interests. USO invests in Oil Interests to the fullest extent possible without being leveraged or unable to satisfy its current or potential margin or collateral obligations with respect to its investments in Oil Futures Contracts and Other Oil-Related Investments. A significant portion of USO’s NAV is held in cash and cash equivalents that are used as margin and as collateral for its trading in Oil Interests. The balance of the assets is held in USO’s account at its custodian bank and in investments in money market funds and Treasuries at the FCMs. Income received from USO’s investments in money market funds and Treasuries is paid to USO. During the nine months ended September 30, 2025, USO’s expenses did not exceed the income USO earned and the cash earned from the sale of Creation Baskets and the redemption of Redemption Baskets. During the nine months ended September 30, 2025, USO did not use other assets to pay expenses. To the extent income exceeded expenses, USO’s NAV will be positively impacted.

Current wording

USO currently generates cash primarily from: (i) the sale of baskets consisting of 100,000 shares (“Creation Baskets”) and (ii) income earned on Treasuries, cash and/or cash equivalents. USO has allocated substantially all of its net assets to trading in Oil Interests. USO invests in Oil Interests to the fullest extent possible without being leveraged or unable to satisfy its current or potential margin or collateral obligations with respect to its investments in Oil Futures Contracts and Other Oil-Related Investments. A significant portion of USO’s NAV is held in cash and cash equivalents that are used as margin and as collateral for its trading in Oil Interests. The balance of the assets is held in USO’s account at its custodian bank and in investments in money market funds and Treasuries at the FCMs. Income received from USO’s investments in money market funds and Treasuries is paid to USO. During the three months ended March 31, 2026, USO’s expenses did not exceed the income USO earned and the cash earned from the sale of Creation Baskets and the redemption of Redemption Baskets. During the three months ended March 31, 2026, USO did not use other assets to pay expenses. To the extent income exceeds expenses, USO’s NAV will be positively impacted.

Previous wording

USO’s investments in Oil Interests may be subject to periods of illiquidity because of market conditions, regulatory considerations and other reasons. For example, most commodity exchanges limit the fluctuations in futures contracts prices during a single day by regulations referred to as “daily limits.” During a single day, no trades may be executed at prices beyond the daily limit. Once the price of a futures contract has increased or decreased by an amount equal to the daily limit, positions in the contracts can neither be taken nor liquidated unless the traders are willing to effect trades at or within the specified daily limit. Such market conditions could prevent USO from promptly liquidating its positions in Futures Contracts. During the nine months ended September 30, 2025, USO did not purchase or liquidate any of its positions while daily limits were in effect; however, USO cannot predict whether such an event may occur in the future.

Current wording

USO’s investments in Oil Interests may be subject to periods of illiquidity because of market conditions, regulatory considerations and other reasons. For example, most commodity exchanges limit the fluctuations in futures contracts prices during a single day by regulations referred to as “daily limits.” During a single day, no trades may be executed at prices beyond the daily limit. Once the price of a futures contract has increased or decreased by an amount equal to the daily limit, positions in the contracts can neither be taken nor liquidated unless the traders are willing to effect trades at or within the specified daily limit. Such market conditions could prevent USO from promptly liquidating its positions in Futures Contracts. During the three months ended March 31, 2026, USO did not purchase or liquidate any of its positions while daily limits were in effect; however, USO cannot predict whether such an event may occur in the future.

Previous wording

As of September 30, 2025, USO held cash deposits and short-term investments in the amount of $901,511,887 with the custodian and FCMs. Some or all of these amounts held by a custodian or an FCM, as applicable, may be subject to loss should USO’s custodian or FCMs, as applicable, cease operations.

Current wording

As of March 31, 2026, USO held cash deposits and short-term investments in the amount of $2,300,218,065 with the custodian and FCMs. Some or all of these amounts held by a custodian or an FCM, as applicable, may be subject to loss should USO’s custodian or FCMs, as applicable, cease operations.

Previous wording

As of September 30, 2025, USO’s portfolio held 11,962 Oil Futures Contracts traded on the NYMEX. As of September 30, 2025, USO did not hold any Oil Futures Contracts traded on the ICE Futures. For a list of USO’s current holdings, please see USO’s website at www.uscfinvestments.com.

Current wording

As of March 31, 2026, USO’s portfolio held 23,766 Oil Futures Contracts traded on the NYMEX. As of March 31, 2026, USO did not hold any Oil Futures Contracts traded on the ICE Futures. For a list of USO’s current holdings, please see USO’s website at www.uscfinvestments.com.