Stock Track | iRhythm Technologies Plunges 11.92% After-Hours Despite Q1 Revenue Beat and Raised Guidance

Stock Track04:54

iRhythm Technologies Inc. (IRTC) experienced a significant after-hours plunge of 11.92% on Thursday following the release of its first-quarter 2026 financial results.

The company reported a net loss of $13.9 million for the quarter, which represents a 54.6% narrowing from the year-ago period. Revenue rose 25.7% to $199.4 million, beating the IBES estimate of $194 million. Gross margin improved to 70.9%, and adjusted EBITDA swung to a profit of $14.1 million.

Despite these positive metrics, the stock sold off sharply in post-market trading. iRhythm also raised its fiscal 2026 revenue guidance to $875 million-$885 million and lifted its adjusted EBITDA margin outlook to 12%-13%, but this appears to have fallen short of market expectations, leading to the significant decline in share price.

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