Investor Presentaiton

2 BORUSAN MANNESMANN: LOCAL PLAYER OF GLOBAL MARKETS SALZGITTERAG Stahl und Technologie BORUSAN HOLDİNG ( 23 23% (77% D Borusan Mannesmann Yatırım Holding BMBYH 73.5% Float and Other 26.5% Borusan Mannesmann Boru San. ve Tic. A.Ş. - BMB Borusan Mannesmann Pipe "BM Pipe" - 100% Borusan Mannesmann Vobarno Tubi Borusan Tube Products "Borusan Tube Romanya" 100% Borusan Tube International "Borusan Tube Germany" 100% "BM Vobarno" - 99% Borusan Berg Pipe Panama - 100% Borusan Berg Pipe Mobile - 100% * Detailed information is available on Berg Pipe Acquisition Presentation at https://www.borusanmannesmann.com/media/2554/bmb-berg-pipe-acqusition-final-eng.pdf " Borusan Mannesman ("BMB"), is among the pioneer manufacturers in Europe's and the world's steel pipe sector. Founded in 1958, BMB is the first industrial company of Borusan Group. In 1994, the Company's shares have been quoted on Borsa İstanbul and since been trading with BRSAN ticker symbol. (Float: 19.85%) In 1998, BMB merged its operations in Turkey with Salzgitter Mannesmann GMBH; the leader steel company in Europe. In 2001, in line with its strategy to grow in global markets, BMB acquired its first company abroad in Italy, established its first company in the USA in 2014, and started an investment in Romania in 2023. Ultimately, in parallel to its strategy of positioning itself as the "local player of global markets", BMB acquired 100% of USA originated Berg Europipe Holding Corp's shares in April 13, 2023, in exchange of $162 million.* Berg Pipe financials have been consolidated into Borusan Mannesmann's financial tables as of April 13, 2023. Borusan Holding signed a share purchase agreement in June 2023 to acquire 23% share of Salzgitter Mannesmann GmbH in BMBYH's capital, for a transaction price of €52,8 million. Necessary permissions for the share transfer have been obtained. The Extraordinary General Assembly Meeting is to convene on November 21 for the amendment of Articles of Association. BORUSAN MANNESMANN

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