This announcement is issued as a corrective statement to the announcement released at 3:02p.m. on 13 March 2026 (RNS No. 6440W). Details of the total number of shares sold, total proceeds, and resultant shareholding of Charlestown Energy Partners LLC are restated below.

13 March 2026

Sintana Energy, Inc.

("Sintana" or the "Company")

Director/PDMR Shareholding

Sintana Energy, Inc (TSXV:SEI, AIM:SEI, OTCQX:SEUSF), announces that between the 6th and the 12^th of March 2026, Charlestown Energy Partners LLC a private company that Robert Bose, CEO of Sintana, is a minority, beneficial owner of and also the managing member of, sold a total of 1,497,500 Common Shares in the Company (the "Shares") at an average price of $0.387 US dollars per Share for total proceeds of $579,532 US dollars. Charlestown Energy Partners LLC now holds 23,173,412 shares of Sintana, representing approximately 4.5 per cent of the share capital of the Company.

Additionally, Mr. Bose holds the legal and beneficial title in 1,402,334 Common Shares directly, 416,666 Common Shares held by CP Sintana LLC and 250,000 Common Shares held by Kuromatsu LLC.

Further information:

About Sintana

Sintana, the Canadian parent company of a group of companies, is focused on the acquisition, exploration, potential development, and ultimately the monetisation of a diverse portfolio of interests in high-impact assets with significant hydrocarbon resource potential in emerging "frontier" geographies. Specifically, this includes 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), providing exposure to a range of geologic plays, basins, operators, regulators, jurisdictions and geopolitical regimes.

Notification and public disclosure of transactions by persons discharging managerial responsibilities ("PDMRs") and persons closely associated ("PCAs") with them.