RIDGEWOOD ENERGY T FUND LLC

During the years ended December 31, 2025 and 2024, the Fund had no drilling activity for exploratory and developmental wells.

Unaudited Oil and Gas Reserve Quantities

The preparation of the Fund’s oil and gas reserve estimates are completed in accordance with the Fund’s internal control procedures over reserve estimation. Such control procedures include: 1) verification of input data that is provided to an independent petroleum engineering firm; 2) engagement of well-qualified and independent reservoir engineers for preparation of reserve reports annually in accordance with SEC reserve estimation guidelines; and 3) a review of the reserve estimates by a third-party independent petroleum engineering firm.

The Manager’s primary technical person in charge of overseeing the Fund’s reserve estimates has a B.S. degree in Petroleum Engineering, a Master of Business Administration, and is a member of the Society of Petroleum Engineers, the Association of American Drilling Engineers and the American Petroleum Institute. With over thirty-five years of industry experience, he is currently responsible for reserve reporting, engineering and economic evaluation of exploration and development opportunities, and the oversight of drilling and production operations.

The Fund’s reserve estimates as of December 31, 2025 and 2024 were prepared by Netherland, Sewell & Associates, Inc. (“NSAI”), an independent petroleum engineering firm. The information regarding the qualifications of the petroleum engineer is included within the report from NSAI, which is filed as Exhibit 99.1 to this Annual Report, and is incorporated herein by reference.

Proved Reserves. Proved oil and gas reserves are estimated quantities of oil and natural gas, which geological and engineering data demonstrate with reasonable certainty to be recoverable in future years from known reservoirs under existing economic and operating conditions. Proved developed oil and gas reserves are proved reserves expected to be recovered through existing wells with existing equipment and operating methods. Proved undeveloped oil and gas reserves are proved reserves expected to be recovered through new wells on undrilled acreage, or through existing wells where a relatively major expenditure is required for recompletion. The information regarding the Fund’s proved reserves, which is contained in Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Annual Report under the heading “Critical Accounting Estimates – Proved Reserves,” is incorporated herein by reference. The information regarding the Fund’s unaudited net quantities of proved developed and undeveloped reserves, which is contained in Table III in the “Supplementary Financial Information – Information about Oil and Gas Producing Activities – Unaudited” included in Item 8. “Financial Statements and Supplementary Data” of this Annual Report, is incorporated herein by reference.

Proved Undeveloped Reserves. As of December 31, 2025, the Fund had proved undeveloped reserves related to the Beta Project totaling 38 thousand barrels of oil, 4 thousand barrels of natural gas liquid (“NGL”) and 18 thousand mcf of natural gas. As of December 31, 2024, the Fund had proved undeveloped reserves related to the Beta Project totaling 38 thousand barrels of oil, 3 thousand barrels of NGL and 18 thousand mcf of natural gas. The Beta Project was determined to be a discovery in 2012 and commenced production in 2016. The amount of total proved undeveloped reserves at December 31, 2025 remained relatively consistent with the amount of total proved undeveloped reserves at December 31, 2024.

The proved undeveloped reserves relating to the Beta Project, which were initially assigned at the end of the year 2021 and 2022, are associated with planned well recompletions. The Fund did not incur costs during the year ended December 31, 2025 to advance the development of its proved undeveloped reserves related to the Beta Project. The Fund expects additional recompletion operations to be completed in 2026 related to the Beta Project.

Information regarding estimated future development costs relating to the Beta Project, which is contained in Item 1. “Business” of this Annual Report under the heading “Properties,” is incorporated herein by reference. Estimated future development costs include capital spending on planned well recompletions.

Production and Prices

The information regarding the Fund’s production of oil and natural gas, and certain price and cost information during the years ended December 31, 2025 and 2024 that is contained in Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” of this Annual Report under the headings “Results of Operations – Overview” and “Results of Operations – Operating Expenses” is incorporated herein by reference. The Form 10-K for the fiscal year ended December 31, 2024 provides information regarding the Fund’s production of oil and natural gas, and certain price and cost information during the years ended December 31, 2024 and 2023 contained in Item 7. “Management’s Discussion and Analysis of Financial Condition and Results of Operations” under the headings “Results of Operations – Overview” and “Results of Operations – Operating Expenses” that is incorporated herein by reference.

Delivery Commitments

As of December 31, 2025, the Fund had no delivery obligations or delivery commitments under any existing contracts.