Impinj (PI) shares fell sharply by 5.44% during intraday trading on Wednesday, as the radio-frequency identification chip maker's fourth-quarter guidance failed to meet heightened investor expectations.

The company expects adjusted EBITDA above the midpoint of its prior guidance ($15.4M-$16.9M) and revenue near the high end of its $90M-$93M range. While solid, this outlook was seen as modest compared to previous quarters, leading to a sell-off. Analysts had anticipated stronger results, with Susquehanna Financial Group noting the guidance as a "disappointment for bulls."

Impinj, an IoT pioneer, saw its shares rise 20% in 2025, outperforming the S&P 500. However, the lack of a guidance hike in Q4 has tempered investor enthusiasm, driving the stock lower.