Wendy's stock has slid roughly one-third, handing Nelson Peltz's Trian Partners a fresh opening to push for changes at the fast-food chain. The sharp decline in market value makes the company an attractive target for activist investors who thrive on buying beaten-down shares and engineering turnarounds.

Peltz has built a reputation for targeting underperforming consumer brands and pressuring management on strategy and capital allocation. Wendy's fits the profile perfectly: a recognizable name trading at a steep discount, with plenty of operational levers to pull.

The question now is whether Wendy's board will welcome engagement or dig in against outside pressure. For Peltz, the math is straightforward—buy cheap, demand change, pocket gains when the market re-rates the stock.