Agreements

SEAMEC/BSE&NSE/SMO/CHARTERHALOFSEAMECANANT/2110/2026 October 21, 2026 Corporate Relations Department The Manager Listing Department BSE Limited National Stock Exchange of India Limited Phirojee Jeejeebhoy Towers, Exchange Plaza, Plot No. C/1, G Block, Dalal Street, Bandra-Kurla Complex, Bandra (East) Mumbai – 400001 Mumbai - 400051 Scrip Code: 526807 Trading Symbol: SEAMECLTD Sub: Disclosure under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 Dear Sir / Madam, Further to our letter reference no. SEAMEC / BSE & NSE / SMO / TAKEOVERSEAMECANANT /1410/2026 dated 14th October, 2026, we wish to inform you that the Company and HAL Offshore Limited (HAL) have entered into a contract dated October 21, 2026, for charter hire of Vessel SEAMEC ANANT for deployment with Oil and Natural Gas Corporation (ONGC) IMR jobs. The charter hire period is for approximately 1225 days, subject to HAL’s Charter Hire Agreement with ONGC. The total contract value for the said period is about USD 55 million exclusive of GST. This is a related party transaction and in the normal course of business. Pursuant to Clause 5 of Para B of Part A of Schedule III of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 read with SEBI circular dated January 30, 2026, we enclose herewith the requisite details in the prescribed Annexure. Date and time of execution of the agreement: October 21, 2026 at 16:33 hours. We request you to kindly take the above on your records. Thanking you, Yours Faithfully, For SEAMEC LIMITED S.N. Mohanty President – Corporate Affairs, Legal and Company Secretary ANNEXURE Sr. No. Description Remarks a) Name(s) of parties with whom the agreement is entered M/s HAL Offshore Limited b) Purpose of entering into the agreement Charter Hire of Vessel “SEAMEC ANANT” for deployment with Oil and Natural Gas Corporation (ONGC) IMR jobs. c) Size of Agreement The charter hire period is for approximately 1225 days, subject to HAL’s Charter Hire Agreement with ONGC. The total contract value for the said period is about USD 55 million exclusive of GST d) Shareholding, if any, in the entity with whom the agreement is Hal Offshore Limited holds 70.77 % of executed; shareholding in SEAMEC Limited. e) Significant terms of the agreement (in brief) special rights like right to NA appoint directors, first right to share subscription in case of issuance of shares, right to restrict any change in capital structure etc’ f) Whether, the said parties are related to Promoter / Promoter Group / YES, HAL Offshore Limited is the Group companies in any manner. If yes, nature of relationship. Promoter of SEAMEC Limited g) Whether the transaction would fall within Related Party The transaction will be Related Party Transactions? If yes, whether the same is done at “arm’s length” Transaction and is on Arms’ Length. h) In case of issuance of shares to the parties, details of issue price, class NA of shares issued i) In case of loan agreements, details of lender/ borrower, nature of the NA loan, total amount of loan granted / taken, total amount outstanding, date of execution of the loan agreement/sanction letter, details of the security provided to the lender / by the borrowers for such loan or in case outstanding loans lent to a party or borrowed from a party become material on a cumulative basis j) Any other disclosures related to such agreements, viz, details of NA nominee on the board of directors of the listed entity, potential conflict of interest arising out of such agreement, etc; k) In case of termination or amendment of agreement, listed entity shall NA disclose additional details to the Stock Exchange(S): i) Name of the parties to the agreement; ii) Nature of the agreement; iii) Date of execution of the agreement; iv) Details of amendment and impact thereof or reasons of termination and impact thereof;