Quarterly Report for Quarter Ending June 30, 2026 (Form 10-Q)

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futures contracts and exchange-traded funds are based upon exchange settlement prices. Grant Park values forward contracts and options on forward contracts based on the average bid and ask price of quoted forward spot prices obtained. U.S. Government securities, securities of U.S. Government-sponsored enterprises, corporate bonds and commercial paper are valued using current market quotations provided by an independent external pricing source to determine fair value.

Results of Operations

Grant Park's returns, which are Grant Park's trading gains plus interest and dividend income less brokerage fees, performance fees, operating costs and offering costs borne by Grant Park, for the three and six months ended June 30, 2026 and 2025, are set forth in the table below:

Grant Park's total net asset value at June 30, 2026 was approximately $18.6 million, at December 31, 2025 was approximately $19.5 million, and at June 30, 2025 was approximately $19.2 million, respectively. Results from past periods are not indicative of results that may be expected for any future period.

The table below sets forth Grant Park's trading gains or losses by sector, excluding securities, for the three and six months ended June 30, 2026 and 2025.

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Three months ended June 30, 2026 compared to three months ended June 30, 2025

For the three months ended June 30, 2026, Grant Park had a negative return of (0.7)% for the Class A units, a negative return of (0.9)% for the Class B units, a negative return of (0.2)% for the Legacy 1 Class units, a negative return of (0.2)% for the Legacy 2 Class units, a negative return of (0.0)% for the Global 1 Class units, and a negative return of (0.1)% for the Global 2 Class units. On a combined basis prior to expenses, Grant Park had trading gains of 0.3% which were increased by gains of 0.7% from interest and dividend income. These trading gains were decreased by 1.5% in combined brokerage fees, performance fees and operating and offering costs borne by Grant Park. For the same period in 2025, Grant Park had a negative return of (1.8)% for the Class A units, a negative return of (2.0)% for the Class B units, a negative return of (1.3)% for the Legacy 1 Class units, a negative return of (1.3)% for the Legacy 2 Class units, a

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negative return of (1.1)% for the Global 1 Class units, and a negative return of (1.2)% for the Global 2 Class units. On a combined basis prior to expenses, Grant Park had trading losses of 0.9% which were decreased by gains of 0.9% from interest and dividend income. These trading losses were increased by 1.6% in combined brokerage fees, performance fees and operating and offering costs borne by Grant Park.

Six months ended June 30, 2026 compared to six months ended June 30, 2025

For the six months ended June 30, 2026, Grant Park had a positive return of 1.6% for the Class A units, a positive return of 1.2% for the Class B units, a positive return of 2.8% for the Legacy 1 Class units, a positive return of 2.6% for the Legacy 2 Class units, a positive return of 3.0% for the Global 1 Class units, and a positive return of 2.9% for the Global 2 Class units. On a combined basis prior to expenses, Grant Park had trading gains of 3.0% which were increased by gains of 1.5% from interest and dividend income. These trading gains were decreased by 2.5% in combined brokerage fees, performance fees and operating and offering costs borne by Grant Park. For the same period in 2025, Grant Park had a negative return of (6.0)% for the Class A units, a negative return of (6.3)% for the Class B units, a negative return of (4.9)% for the Legacy 1 Class units, a negative return of (5.0)% for the Legacy 2 Class units, a negative return of (4.6)% for the Global 1 Class units, and a negative return of (4.7)% for the Global 2 Class units. On a combined basis prior to expenses, Grant Park had trading losses of 4.5% which were decreased by gains of 1.8% from interest and dividend income. These trading losses were increased by 2.9% in combined brokerage fees, performance fees and operating and offering costs borne by Grant Park.

Six months ended June 30, 2026

Trading on international markets may increase the risk that events or circumstances that disrupt such markets may have a materially adverse effect on Grant Park's business or operations or the value of positions held by Grant Park. Such events or circumstances may include, but are not limited to, inflation or deflation, currency devaluation, interest rate changes, exchange rate fluctuations, changes in government policies, natural disasters, pandemics or other extraordinary events, armed conflicts, political or social instability or other unforeseen developments that cannot be quantified.

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Grant Park could lose money over short periods due to short-term volatility or market movements and over longer periods during more prolonged market downturns. During a general market downturn, multiple asset classes may be negatively affected. Changes in market conditions and interest rates can have the same impact on all types of securities and instruments. In times of severe market disruptions, investors could lose their entire investment.

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Key trading developments for Grant Park during the first six months of 2026 included the following:

January. Grant Park recorded gains during the month. Class A units were up 7.69%, Class B units were up 7.76%, Legacy 1 Class units were up 7.61%, Legacy 2 Class units were up 7.61%, Global 1 Class units were up 7.66% and Global 2 Class units were up 7.61%. Grant Park's January performance was positive. Positive performance in the metals sector was driven by positions in gold, silver, aluminum and copper. Performance in the stock indices sector was positive and was driven by positions in the FTSE Taiwan, Nikkei, MSCI Emerging Markets and FTSE indices. Currencies sector performance was positive and was driven by positions in the Mexican peso, British pound and Australian dollar. The agricultural markets were positive, led by positions in cocoa, sugar and soybean meal. The interest-rate sector was positive due to positions in Japanese government bonds, Italian government bonds and U.S. 10-year treasury notes. The energies sector was positive due to positions in gasoline blendstock and heating oil.

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February. Grant Park recorded gains during the month. Class A units were up 1.76%, Class B units were up 1.70%, Legacy 1 Class units were up 1.94%, Legacy 2 Class units were up 1.92%, Global 1 Class units were up 1.98% and Global 2 Class units were up 1.96%. Grant Park's February performance was positive. Performance in the stock indices sector was positive and was driven by positions in the Nikkei, FTSE, S&P Canada and MSCI Emerging Markets indices. Positive performance in the metals sector was driven by positions in gold, high-grade copper and platinum. The energies sector was positive due to positions in gasoline blendstock, crude oil and natural gas. The interest-rate sector was negative due to positions in Japanese government bonds, U.K. gilts and German long-term government bonds. The

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agricultural markets were negative, led by positions in feeder cattle, soybean meal and live cattle. Currencies sector performance was flat.

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March. Grant Park recorded losses during the month. Class A units were down 6.64%, Class B units were down 6.81%, Legacy 1 Class units were down 6.19%, Legacy 2 Class units were down 6.24%, Global 1 Class units were down 6.14% and Global 2 Class units were down 6.14%. Grant Park's March performance was negative. Performance in the stock indices sector was negative and was driven by positions in the Nikkei, FTSE, MSCI Emerging Markets and VIX volatility indices. The interest-rate sector was negative due to positions in Italian government bonds, U.S. Ultra T-notes and French government bonds. Negative performance in the metals sector was driven by positions in gold, high-grade copper and copper. Currencies sector performance was negative, led by positions in the Mexican peso, British pound, Canadian dollar and Australian dollar. The energies sector was positive due to positions in gasoline blendstock, crude oil and heating oil. The agricultural markets were flat.

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April. Grant Park recorded gains during the month. Class A units were up 2.53%, Class B units were up 2.47%, Legacy 1 Class units were up 2.61%, Legacy 2 Class units were up 2.62%, Global 1 Class units were up 2.65% and Global 2 Class units were up 2.61%. Grant Park's April performance was positive. Performance in the stock indices sector was positive and was driven by positions in the Nasdaq, Nikkei, S&P 500, MSCI Emerging Markets and FTSE China A50 indices. The agricultural markets were positive, led by positions in soybean oil, live cattle and feeder cattle. Positive performance in the energies sector was due to positions in gasoline blendstock. The interest-rate sector was positive due to positions in Japanese government bonds and Euro-Buxl. Currencies sector performance was slightly positive, led by positions in the British pound, Mexican peso and Australian dollar. Negative performance in the metals sector was driven by positions in gold.

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May. Grant Park recorded losses during the month. Class A units were down 0.83%, Class B units were down 0.89%, Legacy 1 Class units were down 0.60%, Legacy 2 Class units were down 0.62%, Global 1 Class units were down 0.56% and Global 2 Class units were down 0.58%. Grant Park's May performance was negative. The agricultural markets were negative, led by positions in feeder cattle, live cattle, corn, robusta, red wheat and cotton. The energies sector was negative due to positions in gasoline blendstock, natural gas and brent oil. The interest-rate sector was negative due to positions in Australian 3-year bonds, German bunds and Euro-Buxl. Performance in the stock indices sector was positive and was driven by positions in the Nikkei, Nasdaq, S&P 500 and FTSE Taiwan indices. Currencies sector performance was positive, led by positions in the Japanese yen, Mexican peso, and USD/CNH (Renminbi) futures. Positive performance in the metals sector was driven by positions in high-grade copper and aluminum.

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June. Grant Park recorded losses during the month. Class A units were down 2.35%, Class B units were down 2.41%, Legacy 1 Class units were down 2.09%, Legacy 2 Class units were down 2.15%, Global 1 Class units were down 2.04% and Global 2 Class units were down 2.04%. Grant Park's June performance was negative. The agricultural markets were negative, led by positions in soybean oil, sugar, coffee, soybean meal, corn, feeder cattle and live cattle. Negative performance in the metals sector was driven by positions in gold, high-grade copper, aluminum, iron ore and nickel. The energies sector was negative due to positions in gasoline blendstock and heating oil. The interest-rate sector was negative due to positions in Japanese government bonds and the Euro-Buxl. Performance in the stock indices sector was positive and was driven by positions in the Nikkei index. Currencies sector performance was positive, led by positions in the Canadian dollar, Japanese yen, euro, Swiss franc, U.S. dollar and New Zealand dollar.

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Six months ended June 30, 2025

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Key trading developments for Grant Park during the first six months of 2025 included the following:

January. Grant Park recorded gains during the month. Class A units were up 0.56%, Class B units were up 0.51%, Legacy 1 Class units were up 0.75%, Legacy 2 Class units were up 0.73%, Global 1 Class units were up 0.80% and Global 2 Class units were up 0.78%. Grant Park's January performance was positive. Positive performance in the agriculturals sector was led by positions in coffee, robusta, live cattle, feeder cattle and cotton. Performance in the metals sector was positive and driven by positions in gold. Performance in the stock indices sector was positive and was driven by positions in the FTSE, Dax, S&P Canada and All Ordinaries indices. The energies sector was negative due to positions in gas oil, brent oil and natural gas. Currencies sector performance was negative, led by positions in the

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Japanese yen and Mexican peso. The interest rate sector performance was negative due to positions in Ultra Treasury notes, 3-month SONIA futures, 3-month CORRA futures and Ultra Treasury bonds.

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February. Grant Park recorded losses during the month. Class A units were down 5.15%, Class B units were down 5.20%, Legacy 1 Class units were down 4.97%, Legacy 2 Class units were down 4.99%, Global 1 Class units were down 4.93% and Global 2 Class units were down 4.95%. Grant Park's February performance was negative across all investment sectors. Losses in the agriculturals sector occurred in positions in cattle, robusta, cocoa, sugar and corn. In the interest-rate sector, performance was negative in Ultra Treasury notes, Ultra Treasury bonds, U.S. 10-year Treasury Notes and German bunds positions. Currencies sector performance was negative, led by positions in the Japanese yen, Swiss franc and British pound. The energies sector was negative due to positions in crude oil and brent oil. Performance in the metals sector was negative and driven by positions in high grade copper and platinum. Performance in the stock indices sector was slightly negative and was driven by positions in the Nasdaq and MSCI EM indices.

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March. Grant Park recorded gains during the month. Class A units were up 0.42%, Class B units were up 0.37%, Legacy 1 Class units were up 0.61%, Legacy 2 Class units were up 0.59%, Global 1 Class units were up 0.66% and Global 2 Class units were up 0.64%. Grant Park's March performance was positive. Performance in the metals sector was positive and driven by positions in gold and silver. In the interest-rate sector, positive performance was led by positions in German bunds, Japanese government bonds and the Euro-Buxl. The energies sector was slightly negative due to positions in gas oil, brent oil and heating oil. Losses in the agriculturals sector occurred in positions in sugar, cotton and cocoa. Performance in the stock indices sector was negative and was driven by positions in the Dax, OMX 30 and FTSE indices. Currencies sector performance was negative, led by positions in the euro, Swiss franc, U.S. dollar and New Zealand dollar.

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April. Grant Park recorded losses during the month. Class A units were down 1.87%, Class B units were down 1.92%, Legacy 1 Class units were down 1.68%, Legacy 2 Class units were down 1.70%, Global 1 Class units were down 1.63% and Global 2 Class units were down 1.65%. Grant Park's April performance was negative. Performance in the stock indices sector was negative and was driven by positions in the Hang Seng, OMX 30 and FTSE MIB indices. In the interest-rate sector, negative performance was led by positions in Japanese government bonds, U.S. 10-year Treasury Notes, U.S. Ultra Treasury Bonds and the Euro-Buxl. Currencies sector performance was negative, led by positions in the Japanese yen, Canadian dollar, New Zealand dollar and Australian dollar. The energies sector was slightly negative due to positions in crude oil, gasoline blendstock and natural gas. Small losses in the agriculturals sector occurred in positions in coffee, cotton and soybean oil. Performance in the metals sector was positive and driven by positions in gold, aluminum and zinc.

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May. Grant Park recorded losses during the month. Class A units were down 0.97%, Class B units were down 1.02%, Legacy 1 Class units were down 0.77%, Legacy 2 Class units were down 0.80%, Global 1 Class units were down 0.73% and Global 2 Class units were down 0.75%. Grant Park's May performance was negative. In the interest-rate sector, negative performance was led by positions in 3-month SOFR contracts, 3-month SONIA contracts, 2-year U.S. Treasury Notes and U.S. Ultra Treasury Notes. Performance in the metals sector was negative and driven by positions in aluminum, palladium and gold. The energies sector was negative due to positions in brent oil. Gains in the agricultural markets occurred in positions in live cattle, coffee and corn. Performance in the stock indices sector was positive and was driven by positions in the FTSE China A50, Hang Seng and FTSE indices. Currencies sector performance was positive, led by positions in the British pound.

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June. Grant Park recorded gains during the month. Class A units were up 1.02%, Class B units were up 0.96%, Legacy 1 Class units were up 1.21%, Legacy 2 Class units were up 1.19%, Global 1 Class units were up 1.26% and Global 2 Class units were up 1.24%. Grant Park's June performance was positive. Gains in the agricultural markets were made in positions in soybean meal, sugar, live cattle, coffee and corn. Performance in the stock indices sector was positive and was driven by positions in the Nikkei, Nasdaq, MSCI EM and NIFTY 50 indices. Currencies sector performance was positive, led by positions in the British pound, Mexican peso, euro and the U.S. dollar. Performance in the metals sector was positive and driven by positions in platinum, silver and palladium. In the interest-rate sector,

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negative performance was led by positions in U.S. 10-year Treasury Notes, U.S. Ultra Treasury Bonds, Euro-Schatz and U.K. Gilts. The energies sector was negative due to positions in gas oil and brent oil.

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Capital Resources

Effective April 1, 2019, units in Grant Park were no longer offered for sale. For existing investors in Grant Park, business has been and will continue as usual. There was no change in trading, operations or monthly statements, etc., and redemptions requests will continue to be offered on a monthly basis.

Due to the nature of Grant Park's business, it does not make any capital expenditures and does not have any capital assets that are not operating capital or assets.

Grant Park maintains 65% to 95% of its net asset value in cash, cash equivalents or other liquid positions over and above that needed to post as collateral for trading. These funds are available to meet redemptions each month.

Liquidity

Most U.S. futures exchanges limit fluctuations in some futures and options contract prices during a single day by regulations referred to as daily price fluctuation limits or daily limits. During a single trading day, no trades may be executed at prices beyond the daily limit. Once the price of a contract has reached the daily limit for that day, positions in that contract can neither be taken nor liquidated. Futures prices have occasionally moved to the daily limit for several consecutive days with little or no trading. Similar occurrences could prevent Grant Park from promptly liquidating unfavorable positions and subject Grant Park to substantial losses that could exceed the margin initially committed to those trades. In addition, even if futures or options prices do not move to the daily limit, Grant Park may not be able to execute trades at favorable prices, if little trading in the contracts is taking place. Other than these limitations on liquidity, which are inherent in Grant Park's futures and options trading operations, Grant Park's assets are expected to be highly liquid.

A portion of each Trading Company's assets is used as margin to support its trading. Margin requirements are satisfied by the deposit of U.S. Treasury bills and/or cash with brokers subject to CFTC regulations and various exchange and broker requirements.

Grant Park maintains a portion of its assets at its clearing brokers as well as at Lake Forest Bank & Trust Company. These assets, which may range from 5% to 35% of Grant Park's value, are held in cash, and/or U.S. Treasury securities. The balance of Grant Park's assets, which range from 65% to 95%, are invested in investment grade money market instruments, U.S. Treasury securities, U.S. Government sponsored enterprises and exchange-traded funds purchased by the general partner which are held in a separate account in the name of GP Cash Management, LLC and were previously custodied at State Street Bank and Trust Company. See Note 4 to the consolidated financial statements included in this report for further information regarding this arrangement. Grant Park has engaged U.S. Bank N.A. as custodian and terminated its custodial relationship with State Street Bank and Trust Company, effective July 31, 2026. The general partner currently manages the liquid assets of Grant Park. Violent fluctuations in prevailing interest rates and/or changes in other economic conditions could cause mark-to-market losses on Grant Park's cash management income.

Off-Balance Sheet Risk

Off-balance sheet risk refers to an unrecorded potential liability that, even though it does not appear on the balance sheet, may result in future obligation or loss. Grant Park trades in futures, swap transactions and other commodity interest contracts and is therefore a party to financial instruments with elements of off-balance sheet market and credit risk. In entering into these contracts, Grant Park faces the market risk that these contracts may be significantly influenced by market conditions, such as interest rate volatility, resulting in such contracts being less valuable. If the markets should move against all of the commodity interest positions of Grant Park at the same time, and if Grant Park were unable to offset positions, Grant Park could lose all of its assets and the limited partners would realize a 100% loss. Grant Park minimizes market risk through real-time monitoring of open positions, diversification of the portfolio and maintenance of a margin-to-equity ratio that rarely exceeds 25%. All positions of Grant Park are valued each day on a mark-to-market basis.

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In addition to market risk, when entering into commodity interest contracts there is a credit risk that a counterparty will not be able to meet its obligations to Grant Park. The counterparty for futures and options on futures contracts traded in the United States and on most non-U.S. futures exchanges is the clearing organization associated with such exchange. In general, clearing organizations are backed by the corporate members of the clearing organization who are required to share any financial burden resulting from the nonperformance by one of their members and, as such, should significantly reduce this credit risk.

In cases where the clearing organization is not backed by the clearing members, like some non-U.S. exchanges, it is normally backed by a consortium of banks or other financial institutions.

In the case of forward contracts, over-the-counter options contracts or swap contracts, which are traded on the interbank or other institutional market rather than on exchanges, the counterparty is generally a single bank or other financial institution, rather than a central clearing organization backed by a group of financial institutions. As a result, there likely will be greater counterparty credit risk in these transactions. Grant Park trades only with those counterparties that it believes to be creditworthy. Nonetheless, the clearing member, clearing organization or other counterparty to these transactions may not be able to meet its obligations to Grant Park, in which case Grant Park could suffer significant losses on these contracts.

In the normal course of business, Grant Park enters into contracts and agreements that contain a variety of representations and warranties and which provide general indemnifications. Grant Park's maximum exposure under these arrangements is unknown, as this would involve future claims that may be made against Grant Park that have not yet occurred. Grant Park expects the risk of any future obligation under these indemnifications to be remote.

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Contractual Obligations

None.