Doximity, Inc. (DOCS) experienced a severe 39.08% plunge in post-market trading on Thursday, following the release of its fiscal third-quarter financial results.

The healthcare technology company reported a mixed quarter, with revenue rising 10% year-over-year to $185.1 million and adjusted earnings per share of $0.46, both beating analyst expectations. However, investors focused on concerning trends including an 18% year-over-year decline in net income to $61.6 million and decreases in both operating cash flow and free cash flow.

The primary catalyst for the sell-off appears to be weak forward guidance. Doximity provided fourth-quarter revenue guidance of $143 million to $144 million, significantly below the consensus estimate of $150.4 million. Additionally, the company narrowed its full-year revenue outlook to a range of $642.5 million to $643.5 million, which falls short of analyst expectations. Adding to investor concerns, the company disclosed that Chief Financial Officer Anna Bryson is taking a temporary medical leave, creating uncertainty around financial leadership during a challenging period.