Sale of Trinidad Business

(TSXV:SEI, AIM:SEI, OTCQX:SEUSF) Sintana Energy Inc. announced that it has received the first instalment of $450,000 in deferred consideration for the sale of its business in Trinidad in 2025. The company agreed with the purchaser to vary the terms of the deferred consideration payment instalments, so that full payment of all outstanding amounts, less an agreed early payment discount, will be accelerated to the end of December 2026, instead of the previous schedule which extended through to the end of 2027. As a result, Sintana expects to receive aggregate cash payments totaling $900,000 in respect of the deferred balance owing for the sale of its Trinidad business, prior to the end of 2026, including the payment already received. This amount is a reduction from the previously expected $1,000,000 across 2026 and 2027. The completion of these payments will fully conclude Sintana's exit from all business, assets, and operations in Trinidad. Sintana Energy Inc. is focused on the acquisition, exploration, potential development, and monetisation of a diverse portfolio of interests in high-impact assets with significant hydrocarbon resource potential in emerging frontier geographies. The company holds interests in eight licences in Namibia and Uruguay, as well as pending indirect interests in additional licences in Namibia and Angola, and legacy assets in Colombia and The Bahamas. Robert Bose is the Chief Executive Officer and Eytan Uliel is the President of Sintana Energy Inc.

PEL90 Participating Interest Exchange with Chevron

(TSXV:SEI, AIM:SEI, OTCQX:SEUSF) Sintana Energy Inc. announced that Trago Energy Pty Ltd, a wholly-owned subsidiary of Custos Energy (Pty) Ltd., has entered into an agreement with Harmattan Energy Limited, an affiliate of Chevron Corporation, regarding its 10% participating interest in Petroleum Exploration License 90 (PEL 90) offshore Namibia. Sintana maintains a 49% indirect interest in Trago. Under the agreement, Trago will transfer its entire 10% participating interest in PEL 90 to Chevron in exchange for $11 million in cash at completion, plus further contingent consideration payable upon the achievement of appraisal and production milestones, including revenues associated with commercial production currently estimated to be between 1.5 and 2.5 million barrels of oil, depending on commodity price assumptions. The transaction provides Trago with ongoing exposure to PEL 90 through contingent consideration, while eliminating its funding and capital risk. Completion of the transaction is subject to governmental, regulatory, and third-party approvals. After completion, Trago will no longer hold a participating interest in PEL 90 and will have no further obligation to fund its share of costs on the licence, including the Nabba-1X exploration well. Sintana will use any upfront consideration, net of all costs including fees and taxes, to support its corporate activities. Upon completion, Custos will contribute N$10 million to the University of Namibia Foundation for the construction of a new campus in Walvis Bay. PEL 90 is located offshore Namibia in the Orange Basin and covers approximately 5,433 km². The licence is operated by Chevron. Adjusted for a recently announced but uncompleted farm-out to Equinor and prior to Trago’s interest exchange, PEL 90 participants are Chevron (35.1%), Qatar Energy (27.5%), Equinor (17.4%), the National Petroleum Corporation of Namibia (10%), and Trago (10%). No reserves or resources have been attributed to PEL 90. Robert Bose is the Chief Executive Officer of Sintana Energy. Eytan Uliel is President of Sintana Energy.

KON-16: Definitive Transaction Documents Executed

(TSX-V: SEI, AIM: SEI, OTCQX: SEUSF) Sintana Energy Inc. announced the execution of definitive agreements for the acquisition of an indirect 5% participating interest in Block KON-16 in the onshore Kwanza Basin, Angola, through the purchase of shares in Corcel KON-16 Limited, a Corcel Plc group company holding an 85% participating interest in Block KON-16. The agreements also provide Sintana with a net profit interest of 2.5% of Corcel's net proceeds from Block KON-16 after first oil until aggregate payments of US$50 million have been made, reducing to 1.5% thereafter. The aggregate consideration for the acquisition is US$2,500,000, comprising a US$500,000 initial payment previously paid to Corcel and a US$2,000,000 cash balance payable at completion. Completion of the transaction remains conditional upon governmental, regulatory and third-party approvals, including those required in Angola, as well as applicable AIM and TSX Venture Exchange requirements, which are expected to be finalized prior to year-end 2026. Corcel has provided an operational update for Block KON-16, including receipt of final PSTM seismic volumes for recently acquired 2D data, completion of a geomechanical program, and the appointment of NRG for the next phase of engineering and well design for the exploration drilling campaign. Corcel is targeting drilling of a pre-salt exploration well on Block KON-16 in 2027, subject to final technical selection, approvals, financing, rig availability and partner alignment. Sintana Energy's CEO, Robert Bose, stated that the progress on KON-16 positions the company to realize on this offshore-scaled resource with an onshore cost. Sintana holds interests in eight licences in Namibia and Uruguay, as well as pending indirect interests in additional licences in Namibia and Angola, and legacy assets in Colombia and The Bahamas.

Sintana Energy Inc — TotalEnergies Becomes Operator of PEL 83

(TSX-V: SEI, AIM: SEI, OTCQX: SEUSF) Sintana Energy Inc. announced the completion of the previously announced transaction between TotalEnergies and Galp Energias, under which TotalEnergies has acquired a 40% operated interest in Petroleum Exploration Licence 83 (PEL 83), home to the giant Mopane discoveries in Namibia's Orange Basin. PEL 83 is now held by TotalEnergies (40% as operator), Galp (40%), NAMCOR (10%) and Custos Energy (Pty) Ltd. (10%). Sintana maintains an indirect 49% interest in Custos, providing the Company with an effective 4.9% interest in PEL 83. The Mopane discoveries have a current 3C resource estimate of approximately 1.3 billion barrels equivalent. TotalEnergies, as operator, plans to initiate a 3-well exploration and appraisal campaign on PEL 83 in 2026. This campaign is in anticipation of a potential final investment decision in relation to a phase 1 development in 2028, targeting first oil production in 2032. Sintana holds interests in eight licences in two countries, Namibia and Uruguay, as well as pending indirect interests in additional licences in Namibia and Angola, and legacy assets in Colombia and The Bahamas. Sintana remains committed to supporting the responsible development of Namibia's resources for the benefit of its people, including through its indirect interest in Custos, a proudly Namibian company.

Sintana Energy Inc — Interim Results for the 3 months to 30 June 2026

(TSX-V:SEI, AIM:SEI, OTCQX:SEUSF) Sintana Energy Inc. announced that it has filed its interim financial statements for the three months ended 30 June 2026 and the accompanying Management's Discussion and Analysis. As at June 30, 2026, Sintana Energy Inc. reported total assets of $67,680,751 and shareholders' equity of $62,104,258. For the three months ended June 30, 2026, Sintana Energy Inc. reported a net loss of $3,089,105 and a net comprehensive loss of $4,189,997. The company had cash and cash equivalents of $15,524,004 as at June 30, 2026. Sintana Energy Inc. completed a capital raise with net proceeds of $9,890,690 during the six months ended June 30, 2026. The company agreed to conditionally assign its interest in the VMM-37 block in Colombia in exchange for total cash consideration of $9 million, of which $3 million has been received to date, with the remaining $6 million payable upon receipt of governmental approvals and satisfaction of certain contractual conditions.

Sintana Energy Inc — Portfolio Update – Strategic Investment

(TSXV:SEI, AIM:SEI, OTCQX:SEUSF) Sintana Energy, Inc. announced the entry into definitive documentation providing for the acquisition of a 44% interest in Maravilla Oil and Gas (Pty) Ltd., a privately held Namibian company focused on high-impact opportunities in West Africa. Maravilla owns an 80% controlling shareholding in Paragon Oil and Gas (Pty) Ltd., which in turn owns a 100% operated interest in Petroleum Exploration License 37 (PEL 37) located in the Walvis Basin, offshore Namibia. Sintana's investment in Maravilla provides an indirect 35% interest in PEL 37. The total consideration for the acquisition is US$6.5MM, comprised of a US$0.5 million deposit, US$3.0 million in cash at signing and closing, US$500,000 in pre-funded expenses, and US$2.5 million in newly issued Sintana common shares at a price of US$0.30 per common share. PEL 37 covers an area of 17,295km² in relatively shallow waters (100 - 1,500m), with identified prospects at water depths between 300 and 600m, and benefits from an extensive technical database including 2,813 km2 of 3D seismic data and ~1,000 line kms of 2D seismic data. In conjunction with Sintana's investment, Maravilla will make a Namibian $1MM donation to the communities in the Erongo Region to be distributed in coordination with the Office of the Governor, the Honorable Dr. Natalia IGoagoses and the Knowledge Foundation, led by Knowledge Katti. Chevron has indicated an expectation of exploration activities including a potential inaugural exploration well in 2027 on PEL 82, which is adjacent to PEL 37.

Broker Appointment

(TSX-V:SEI, AIM:SEI, OTCQX:SEUSF) Sintana Energy Inc. announced that it has appointed Stifel Nicholaus Europe Limited as the Company's Joint Broker, with immediate effect. Sintana Energy is an Atlantic Margin-focused oil and gas company, holding interests in a diverse portfolio of high-impact assets that spans the Southern Atlantic conjugate margin. The Company's current portfolio is strategically positioned in the emerging frontier geographies of Namibia, Uruguay and Angola, with additional legacy assets in Colombia and The Bahamas. Sintana Energy is listed on the TSX-V in Canada under the symbol "SEI", in the United Kingdom on the LSE-AIM under the symbol "SEI" and in the U.S. on the OTCQX under the symbol "SEUSF".

Sintana Energy Inc — Latin-America Updates

(TSX-V:SEI, AIM:SEI, OTCQX:SEUSF) Sintana Energy, Inc. announced that ANCAP, the Uruguayan state-owned energy company and regulator, has agreed to a suspension of the initial exploration subperiod of the AREA OFF-1 block, offshore Uruguay, for 1 year, extending the first exploration subperiod to expire on 23 August 2027. The suspension was requested by Chevron Mexico Finance LLC, Sucursal Uruguay, due to the time taken for environmental authorisation of the AREA OFF-1 3D seismic acquisition campaign. An initial season of seismic acquisition was completed prior to the end of April 2026, with a second season scheduled to commence in Q4 2026. On 14 February 2025, Challenger Energy Group plc, a member of the Sintana group of companies, submitted an expression of interest for an offshore hydrocarbon exploration permit in the North Argentine Basin (CAN - 200). On 15 July 2026, Decree 590/2026 was published, instructing the National Secretariat of Energy to call for an International Public Tender based on Challenger Energy's expression of interest. The company projects that Challenger will proceed to participate in this process, in compliance with Argentine law and authorities.

Solaris Energy Infrastructure Set to Join S&P SmallCap 600

(NYSE: SEI) Solaris Energy Infrastructure Inc. will replace Catalyst Pharmaceuticals Inc. (NASD: CPRX) in the S&P SmallCap 600 effective prior to the opening of trading on Wednesday, July 15. Angelini Pharma S.p.A. is acquiring Catalyst Pharmaceuticals in a deal expected to close soon, pending final closing conditions. The effective date for these index changes is July 15, 2026. Solaris Energy Infrastructure will be added to the S&P SmallCap 600, while Catalyst Pharmaceuticals will be deleted from the index. S&P Dow Jones Indices is a division of S&P Global (NYSE: SPGI). More assets are invested in products based on S&P Dow Jones Indices than products based on indices from any other provider in the world. The S&P 500® and the Dow Jones Industrial Average® are among the financial market indicators managed by S&P Dow Jones Indices.

Sintana Energy Inc — Mid-Year Operational and Corporate Update

(TSX-V:SEI, AIM:SEI, OTCQX:SEUSF) Sintana Energy Inc. provided a mid-year operational and corporate update for the six-month period to 30 June 2026. The company announced a TotalEnergies farm-in to PEL 83 in Namibia, which will include a fully carried three well exploration and appraisal campaign expected to commence in 2H 2026, and a 57% resource upgrade for PEL 83's Mopane project, increasing the 3C contingent resource from 875 mmboe (gross) to 1.38 bnboe (gross; Sintana's 4.9% indirect interest ~67 mmboe). Sintana completed the first season of 3D seismic acquisition at AREA OFF-1 in Uruguay and is fully carried by Chevron for all anticipated costs associated with this program. The company completed the acquisition of Challenger Energy and reached a settlement with ExxonMobil regarding its legacy Colombian interests, resulting in a significant cash receipt. As of 30 June 2026, Sintana's cash balance was approximately $16.1 million, including $700,000 of restricted cash, and it expects approximately $6.75 million of gross cash inflows in the coming six months. The company projects a Final Investment Decision (FID) for the Mopane project in 2028 and first oil in 2032, and anticipates further important milestones in the second half of 2026.

Closing of Fundraise

Sintana Energy, Inc. (TSXV:SEI, AIM:SEI, OTCQX:SEUSF) announced the closing of its Fundraise, following satisfaction of the final condition, Admission. The Company issued 38,001,253 New Common Shares at 22.5 pence per share on AIM and C$0.41 per share on the TSXV, raising aggregate gross proceeds of US$11.5 million (£8.6 million, C$15.6 million). Insiders Robert Bose (CEO) and Eytan Uliel (President) each subscribed for 826,105 Subscription Shares for US$250,000 each. The Fundraise constitutes a related party transaction under Multilateral Instrument 61-101, but exemptions from formal valuation and minority approval requirements apply. Cash finder's fees totaling C$0.9 million were paid in connection with the Fundraise. The New Common Shares are not subject to a hold period under Canadian securities laws. The Fundraise remains subject to the final approval of the TSXV.