D. E. Shaw group has publicly challenged CoStar Group regarding its recent financial reporting changes. The activist investor criticized the reorganization of reporting segments and the decision to stop disclosing specific performance metrics for the Homes.com portal.
These reporting shifts have raised investor concerns regarding transparency and accountability. Market scrutiny follows CoStar’s heavy capital investment in its residential portal.
CoStar shares hit a new 52-week low of $41.83 on March 24, 2026. The stock has lost nearly half of its value over the past year.
The D. E. Shaw letter adds pressure as a standstill agreement with other activist investors expires in early 2026.