Costar Group, INC Schedule 13G passive stakes

Filed when an investor crosses five percent without intending to seek control — the passive counterpart to a 13D.

NASDAQ
Baron Capital Group and its affiliates report a combined beneficial ownership of 5.3% in CoStar Group, Inc., holding over 21.6 million shares.
NASDAQ
Vanguard Capital Management has reported a beneficial ownership of 7.53% in CoStar Group Inc. common stock as of March 31, 2026.
NASDAQ
Vanguard Portfolio Management has reported a beneficial ownership of 9.12% in CoStar Group Inc. common stock as of March 31, 2026.
NASDAQ
The Vanguard Group has filed an amendment to its Schedule 13G for CoStar Group Inc., reporting zero beneficial ownership following an internal realignment.
NASDAQ
BlackRock, Inc. has filed an amended Schedule 13G, reporting a passive beneficial ownership of 7.5% of CoStar Group Inc.'s common stock as of March 31, 2025.