Intimation on Execution of Diving Agreement with M/s. HAL Offshore Limited - Availing Diving Subsea Services on Vessel SAMUDRA SEVAK managed by SEAMEC

SEAMEC LIMITED A member of MMG l'flJGV,.WAJ..GROJP Regd. Office: A-901-905, 9th Floor, 215 Atrium, Andheri Kurla Road, Andheri (East), Mumbai 400 093, India Tel.: +91-22-6694 1800 • Fax: +91-22-6694 1818 • E-mail : contact@seamec.in • CIN : L63032MH1986PLC154910 SEAMEC/BSE&NSE/SMO/ HALDIVINGSAMUDRASEVAK/2307/2026 July 23, 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 no. SEAMEC/BSE&NSE/SMO/NOASAMUDRASEVAK/1303/2026 and SEAMEC/BSE&NSE/SMO/CONTRACTSAMUDRASEVAK/2804/2026 dated 13th March 2026 and 28th April 2026 respectively, we wish to inform you that the Company has, on 23rd July 2026, entered into a Diving Agreement with M/s. HAL Offshore Limited (HAL) for availing Diving Subsea Services on the ONGC Vessel “SAMUDRA SEVAK”, managed by SEAMEC. The total contract value is approximately USD 9.96 million exclusive of GST. The above transaction is a Related Party Transaction and on Arm’s Length and in normal course of business. Pursuant to Clause 5 of Para B of Part A of Schedule III (Listing Obligations and Disclosure Requirements) Regulations, 2015 read with the SEBI Circular dated January 30, 2026, we enclose herewith the requisite details in respect of the said Agreement entered between SEAMEC Limited and HAL Offshore Limited in the prescribed Annexure. Date and time of occurrence of event: July 23, 2026 at 13:53 hours. We request you to kindly take the above on your records. Yours Faithfully, For SEAMEC LIMITED S.N. Mohanty President – Corporate Affairs, Legal and Company Secretary Please visit us at: www.seamec.in - Q Q CONTRACTOR MEMBER GIMCA ~ MGMTSYS MGMlSYS 1SO9001:2015 1SO14001:2015 1SO4SO0U018 International Marine Contractors Association Certified by IRQS Av AC0 71 Certified by IRQS AvA C07 1 Certified by IRQS OHSMS 007 SEAMEC LIMITED A member of MMG l'flJGV,.WAJ..GROJP Regd. Office: A-901-905, 9th Floor, 215 Atrium, Andheri Kurla Road, Andheri (East), Mumbai 400 093, India Tel.: +91-22-6694 1800 • Fax: +91-22-6694 1818 • E-mail : contact@seamec.in • CIN : L63032MH1986PLC154910 ANNEXURE (Clause 5) Sr. No. Description Remarks a) Name(s) of parties with whom the Diving agreement M/s. HAL OFFSHORE LIMITED b) Purpose of entering into the Diving agreement Availing Diving Subsea Services on ONGC Vessel “SAMUDRA SEVAK” managed by SEAMEC. c) Size of Diving agreement The total contract value is approximately USD 9.96 million exclusive of GST d) Shareholding, if any, in the entity with whom the agreement / HAL Offshore Limited holds 70.77 memorandum of understanding is executed; % of 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 / 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 Transactions? The transaction will be Related If yes, whether the same is done at “arm’s length” Party Transaction and is on Arms’ Length. h) In case of issuance of shares to the parties, details of issue price, class of NA 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; Please visit us at: www.seamec.in - Q Q CONTRACTOR MEMBER GIMCA ~ MGMTSYS MGMlSYS 1SO9001:2015 1SO14001:2015 1SO4SO0U018 International Marine Contractors Association Certified by IRQS Av AC0 71 Certified by IRQS AvA C07 1 Certified by IRQS OHSMS 007