The Exchange has received the disclosure under Regulation 29(2) of SEBI (Substantial Acquisition of Shares & Takeovers) Regulations, 2011 for Tenneco Mauritius Holdings Ltd & Others

TENNECO CLEAN AIR INDIA LIMITED (formerly known as Tenneco Clean Air India Private Limited) CIN: L29308TN2018FLC126510 Telephone: +2135 612501/506 Email: Tennecoindiainfo@tenneco.com Website: www.tennecoindia.com Date: August 14, 2026 To To National Stock Exchange of India Limited BSE Limited Exchange Plaza, C-1, Block G Phiroze Jeejeebhoy Towers Bandra Kurla Complex, Dalal Street, Bandra (E), Mumbai – 400051 Mumbai – 400001 Scrip Symbol: TENNIND Scrip Code: 544612 Sub: Disclosure under Regulation 29 of the SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011 Dear Sir/Madam, Please note that the Company has received the disclosures from Tenneco Mauritius Holdings Limited and Tenneco (Mauritius) Limited, Promoters of the Company, pursuant to Regulation 29(2) of the SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011 (“SEBI SAST Regulations”), regarding the sale of equity shares of the Company. Accordingly, please find enclosed the said disclosures and take the same on record in compliance with the provisions of Regulation 29 of the SEBI SAST Regulations. This is for your information and records. Yours faithfully, For Tenneco Clean Air India Limited Roopali Singh Company Secretary and Compliance Officer Membership No: A15006 Place: Gurugram Encl: As above Registered Office: RNS2, Nissan Supplier Park, SIPCOT Industrial Park Oragadam Industrial Corridor, Sriperumbudur, Taluk, Kancheepuram, Tamil Nadu, India, 602105 Date: August 13, 2026 BSE Limited 1st Floor, Phiroze Jeejeebhoy Towers Dalal Street, Mumbai 400 001 Maharashtra, India National Stock Exchange of India Limited Exchange Plaza, C-1, Block G, Bandra Kurla Complex, Bandra (E), Mumbai 400 051 Maharashtra, India Tenneco Clean Air India Limited RNS2, Nissan Supplier Park, SIPCOT Industrial Park, Oragadam Industrial Corridor, Sriperumbudur Taluk, Kanchipuram 602105, Tamil Nadu Sir/ Madam, Sub: Disclosures under Regulation 29(2) of SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011 by Tenneco Mauritius Holdings Limited and Tenneco (Mauritius) Limited in respect of sale of equity shares of Tenneco Clean Air India Limited In compliance with Regulation 29(2) of SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011, as amended, please find enclosed the requisite disclosure. Request you to kindly take note and do the needful. Signature of the Authorised Signatory of the Sellers For TENNECO (MAURITIUS) LIMITED Name: Kevin L. Freeman Designation: Director Place: Chicago, Illinois USA For TENNECO MAURITIUS HOLDINGS LIMITED Name: Kevin L. Freeman Designation: Director Place: Chicago, Illinois USA General Business - Tenneco Confidential Disclosures under Regulation 29(2) of SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011 Name of the Target Tenneco Clean Air India Limited Company (TC) Name(s) of the seller and Tenneco Mauritius Holdings Limited (“TMHL”) Persons Acting in Concert Tenneco (Mauritius) Limited (“TML”) (PAC) with the seller (collectively “Sellers”) Whether the seller belongs to Yes Promoter/Promoter group Name(s) of the Stock (i) National Stock Exchange of India Limited Exchange(s) where the (ii) BSE Limited shares of TC are Listed Details of the acquisition / Number % w.r.t. total % w.r.t. total disposal as follows share/voting diluted capital share/voting wherever capital of the TC applicable (*) (**) Before the acquisition/sale under consideration, TMHL: 24,30,45,425 60.22% 60.22% holding of: TML: 2,67,34,261 6.62% 6.62% a. Shares carrying Total: 26,97,79,686 Total: 66.84 % Total: 66.84% voting rights# b. Shares in the nature N/A N/A N/A of encumbrance (pledge/ lien/ non- disposal undertaking/ others) c. Voting rights (VR) N/A N/A N/A otherwise than by shares d. Warrants/convertible N/A N/A N/A securities/any other instrument that entitles the acquirer to receive shares carrying voting rights in the TC (specify holding in each category) e. Total (a+b+c+d) 26,97,79,686 66.84 % 66.84 % Details of acquisition/sale: TMHL: 5,05,72,736 12.53% 12.53% a. Shares carrying TML: 99,67,910 2.47% 2.47% voting rights acquired/sold Total: 6,05,40,646 Total: 15% Total: 15% b. VRs acquired /sold N/A N/A N/A otherwise than by shares c. Warrants/convertible N/A N/A N/A securities/any other instrument that entitles the acquirer to receive shares carrying voting rights in the TC (specify holding in each category) acquired/sold d. Shares encumbered / N/A N/A N/A invoked/released by the acquirer/ seller e. Total (a+b+c+/-d) 6,05,40,646 15% 15% After the acquisition/sale, holding of: TMHL: 19,24,72,689 47.69% 47.69% TML: 1,67,66,351 4.15% 4.15% a. Shares carrying voting rights## Total: 20,92,39,040 Total: 51.84% Total: 51.84% b. Shares encumbered N/A N/A N/A with the acquirer/seller c. VRs otherwise than N/A N/A N/A by shares d. Warrants/convertible N/A N/A N/A securities/any other instrument that entitles the acquirer to receive shares carrying voting rights in the TC (specify holding in each category) after acquisition e. Total (a+b+c+d) 20,92,39,040 51.84% 51.84% Mode of acquisition / sale Open Market. (e.g. open market / off- market / public issue / rights issue / preferential allotment / inter- se transfer etc). Date of acquisition / sale of August 12, 2026 shares / VR or date of receipt of intimation of allotment of shares, whichever is applicable Equity share capital / total 403,60,43,090 (As per the shareholding pattern of the TC for the voting capital of the TC quarter ended June 30, 2026 (i.e. the latest publicly disclosed before the said acquisition / shareholding pattern), the total no. of equity shares of the TC was sale 40,36,04,309 of face value INR 10/- each) Equity share capital/ total 403,60,43,090 (As per the shareholding pattern of the TC for the quarter voting capital of the TC after ended June 30, 2026, the total no. of equity shares of the TC is the said acquisition / sale 40,36,04,309 of face value INR 10/- each) Total diluted share/voting 403,60,43,090 (As per the shareholding pattern of the TC for the capital of the TC after the quarter ended June 30, 2026, the total no. equity shares (upon fully said acquisition/ sale converted basis) is 40,36,04,309) Note: (*) Total share capital/ voting capital to be taken as per the latest filing done by the company to the Stock Exchange under Regulation 31 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, viz., the shareholding pattern as of June 30, 2026. (**) Diluted share/voting capital means the total number of shares in the TC assuming full conversion of the outstanding convertible securities/warrants into equity shares of the TC. Signature of the Authorised Signatory of the Sellers For TENNECO (MAURITIUS) LIMITED Name: Kevin L. Freeman Designation: Director Place: Chicago, Illinois USA For TENNECO MAURITIUS HOLDINGS LIMITED Name: Kevin L. Freeman Designation: Director Place: Chicago, Illinois USA General Business - Tenneco Confidential