Activist investor Jana Partners is urging Six Flags to explore a sale, according to the Wall Street Journal. The push comes as the theme-park company grapples with disappointing earnings during an ongoing turnaround effort. The firm has built a stake in Six Flags and is pressing management to consider strategic alternatives.

The company has been working to revive its business after a period of weak attendance and financial underperformance. Jana Partners believes a sale could unlock greater value for shareholders. Six Flags has not publicly responded to the activist's demands.

The situation highlights continued investor frustration with the pace of the company's recovery.