GRAIL stock tumbles on short-seller report

Published 09/06/2025, 15:32
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Investing.com -- GRAIL, Inc. (NASDAQ:GRAL) shares fell 5.4% after a report by Ningi Research labeled the company as a short, citing insurmountable regulatory challenges and operational missteps. The short seller’s analysis casts doubt on the commercial viability of GRAIL’s Multi-Cancer Early Detection (MCED) test, Galleri, which aims to detect over 50 types of cancer from a single blood sample.

Ningi Research’s report, released today, argues that GRAIL’s strategy hinges on a precarious sequence of regulatory approvals for its MCED test, which currently lacks both FDA approval and widespread insurance coverage. The report further claims that the company’s leadership has ignored expert advice, leading to a dysfunctional corporate culture and operational errors, resulting in disappointing sales and potential financial distress.

The report challenges the effectiveness of GRAIL’s Galleri test, stating that it is unlikely to receive FDA approval for the detection of more than 50 types of cancer. According to testimony from an Illumina (NASDAQ:ILMN) expert, the test has only shown efficacy in detecting seven early-stage cancers, contrary to the company’s marketing claims. Furthermore, the report highlights that leading insurance providers have designated the Galleri test as "unproven" and "not medically necessary," which significantly hinders reimbursement prospects.

The short seller’s analysis also calls into question GRAIL’s claims of the Galleri test’s positive predictive value (PPV), suggesting that the company’s comparisons to standard screening tools are misleading. The recalculated PPV figures, when adjusted for prevalence rates, do not support GRAIL’s narrative of diagnostic superiority.

GRAIL’s financial situation is also under scrutiny, with actual sales falling short of projections and the company rapidly depleting its cash reserves. Ningi Research suggests that GRAIL’s valuation should be tied to its projected cash reserves through 2025, which they estimate to be around $14.28 per share.

The report from Ningi Research paints a grim picture for GRAIL, Inc., raising serious questions about the company’s future in the highly competitive cancer screening market. Investors reacted to the revelations by driving the stock price down in today’s trading session.

This article was generated with the support of AI and reviewed by an editor. For more information see our T&C.

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