Cerebras falls after Culper reveals short position

Cerebras Systems

28/10/2026 16:28

** Chip firm Cerebras Systems' CBRS.O shares fall 4.7% to $113.67 after Culper Research reveals short position
** Culper says it believes co's flagship Wafer Scale Engine chip, which spans an entire silicon wafer, will last "just 1.2 to 2.5 years in the field"
** Claims CBRS never solved thermal expansion, alleges constant dummy operations keep wafers hot, "such that the wafers never actually cool down"
** "This jerry-rigged workaround has only traded one fatal flaw for another: the wafers never cool, and break down rapidly in the field" - Culper
** Reuters could not independently verify the claims in the report
** CBRS did not immediately respond to a Reuters request for comment
** Up to last close, stock has fallen 61.6% since its May listing on Nasdaq

 (Reporting by Anhata Rooprai in Bengaluru)
 ((Anhata.Rooprai@thomsonreuters.com))