A worker loads an aluminum coil onto a loading dock at the Arconic manufacturing facility in Alcoa, Tennessee.

Metals manufacturer Arconic shares spiked on Monday after a report released from The Wall Street Journal said the company was drawing interest from private equity firms.

The stock closed with shares up 10.47 percent at $19.20 per share on Monday, making it the biggest gainer in the Standard & Poor's 500 index. The stock had its best daily performance since Feb. 2, 2017.

According to a report from The Wall Street Journal released on Friday, the company has piqued the interest of buyout firms, including Apollo Global Management.

Apollo raised $24.6 billion last year for the largest private equity fund ever. It has not announced a large deal this year. The report said the deal, which could cost over $10 billion, is not imminent.

Arconic declined CNBC's request for comment. Apollo did not respond.

The speculation comes amid a rough year for Arconic, whose shares are down about 29 percent for the year. The New York-based company saw no change in net income in the fiscal first quarter compared with the same quarter in 2017 and slashed its 2018 profit forecasts on expectations for high aluminum prices in its earnings report on April 30.

Arconic announced updates to two long-term contracts on Monday. The company will provide Boeing with aluminum sheet and plate for all of the aircraft producer's commercial planes, expanding on the companies' contract from 2014 which focused on manufacturing parts for Boeing's wings.

The New York-based company also announced a two-year joint development agreement with Lockheed Martin, a global security and aerospace company that develops automation, satellite and energy technology. Together, the companies intend to customize lightweight material systems and manufacturing processes for aerospace and defense purposes.

Read the full WSJ report here.