Sales volume fell 7.5 percent, and currency fluctuations weighed on the Swiss confectionery giant.
Revenues in the first half of the year increased by 4.3 percent, compared with analysts' average forecast of 5.4 percent.
Lindt & Sprüngli confirms its growth forecast of 4-6 percent this year.
The stock, which has lost 17 percent so far this year, is down around 1 percent after the half-year figures.
The company cites geopolitical uncertainty and market turmoil as explanations for the unexpectedly weak demand.
The world market price of cocoa has fallen from the 2024-2025 peaks, but remains above historical average levels and is feared to rise if production is disrupted by the El Niño weather phenomenon.
