Wendy’s has rejected a $1.4 billion buyout offer from activist investor Nelson Peltz, saying Thursday that the bid substantially undervalued the company, and its board adopted a shareholder rights plan designed to block a hostile takeover, according to the Chicago Tribune and the Associated Press.

A committee of independent directors unanimously rejected the offer, which was made last week by Peltz’s Trian Fund Management and partner investors who together hold 16.3 percent of the burger chain’s shares. The poison pill plan grants all shareholders except a hostile bidder the right to purchase discounted shares and automatically triggers if any person or group reaches 15 percent ownership. It will remain in place for one year.

Shares of the struggling chain spiked 14 percent last Wednesday after the offer became public, and rose more than 2 percent Thursday as Wendy’s reported better-than-expected third-quarter performance. The company has wrestled with the same pressures as other fast food operators: rising labor, food and packaging costs pushed menu prices higher, and lower-income customers have cut back on visits.

The standoff puts a spotlight on one of the restaurant industry’s most prominent activist campaigns. Peltz, whose Trian has a long history with the company, argued in making the offer that the brand needed sharper operational focus. The board’s decision signals it sees more value in an independent turnaround than in a sale at current levels.

For franchisees and operators across the Chicago area, where Wendy’s maintains dozens of locations, the resolution matters for stability. Several Wendy’s operators nationally have faced financial stress in recent years, and the company has been closing underperforming restaurants as part of a broader cull. A bruising takeover fight could have slowed decisions on remodels, digital investments and menu changes that operators rely on.

Wendy’s said the rights plan does not prevent the investor group from continuing to engage with the company. Both sides now have a year under the plan’s umbrella, and analysts expect Trian to keep pressing for change, whether through the boardroom or the ballot, while the chain works to rebuild traffic among value-conscious diners.

The bid itself underscores how far the brand’s valuation has fallen. A $1.4 billion offer for a company that once traded at more than ten times that figure reflects years of eroding market share in the burger segment, where Wendy’s has struggled to keep pace with rivals’ value menus and digital loyalty programs. The chain’s decision to reject the bid and simultaneously arm itself against a forced sale suggests the board believes a turnaround under current management can deliver more value than Peltz’s price.

Fast food’s value wars have hit operators hard across Illinois and the broader Midwest, where franchisees have absorbed successive minimum wage increases in some markets while passing along menu price hikes that pushed combo meals beyond what many budget-conscious customers will pay. Wendy’s has leaned on limited-time offerings and breakfast expansion to reverse traffic declines, with mixed results.

Whether Trian returns with a higher bid, nominates directors or simply holds its stake will shape the company’s next chapter. For now, the poison pill guarantees no buyer can accumulate control quietly, leaving the activist to negotiate in the open.