MADRID, Oct 7 (Reuters) - Spanish power utility Naturgy (NTGY.MC) , opens new tab has sold about 3.5% of its shares into the market through an accelerated bookbuilding process to further increase its free float in a push to join the MSCI indexes, the company said on Tuesday.

The company listed on Madrid's Ibex-35 index said it raised 883 million euros ($1 billion) at a price of 25.90 euros per share, reducing its own stake in the business to less than 1%.

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The transaction increases the free float - or shares available to the public for trading - to about 18.7%, Naturgy's statement said.

The company said it was the same price, after paying a dividend, it offered in February to buy back almost 2.5 billion euros of its own shares and then resell them in the market.

Naturgy's shares closed at 26.94 euros on Monday.

($1 = 0.8556 euros)

https://www.reuters.com/business/energy/naturgy-sells-35-stake-increase-free-float-2025-10-07/