DM
MREO

Deerfield Management’s Mereo BioPharma MREO Stock Holding History

Deerfield Management’s Portfolio MREO Stock Details MREO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q3 		– Sell
-6,710,429
Closed -$18.2M – 162
2025
Q2 		$18.2M Hold
6,710,429
– – 0.33% 50
2025
Q1 		$15.1M Hold
6,710,429
– – 0.3% 57
2024
Q4 		$23.5M Hold
6,710,429
– – 0.44% 47
2024
Q3 		$27.6M Hold
6,710,429
– – 0.41% 48
2024
Q2 		$24.2M Buy
+6,710,429
New +$21.7M 0.4% 46

Other funds holding MREO

Janus Henderson Group
Janus Henderson Group London $209B AUM 37.72% 1-Year Est. Return
RCMNY
Rubric Capital Management (New York) New York $10.9B AUM 70.31% 1-Year Est. Return
FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return
MP
Mangrove Partners Greenwich, Connecticut $1.52B AUM 36.54% 1-Year Est. Return
Aberdeen Group
Aberdeen Group Edinburgh, United Kingdom $71.2B AUM 41.74% 1-Year Est. Return
6CM
683 Capital Management New York $2.04B AUM 94.26% 1-Year Est. Return
RSCM
Rock Springs Capital Management Baltimore, Maryland $2.05B AUM 161.37% 1-Year Est. Return
CC
Clearline Capital New York $1.68B AUM 53.07% 1-Year Est. Return
Alkeon Capital Management
Alkeon Capital Management New York $74.1B AUM 71.18% 1-Year Est. Return
Morgan Stanley
Morgan Stanley New York $1.89T AUM 35.08% 1-Year Est. Return

Deerfield Management's MREO Position: Q3 2025 in Review

Deerfield Management sold out of Mereo BioPharma (MREO) in Q3 2025, closing a stake of 6,710,429 shares — an estimated $18.2M sold.

Deerfield Management first reported a position in MREO in Q2 2024 and held it in 5 quarters. The position peaked at $27.6M in Q3 2024. 84 funds tracked by Wall St. Rank hold MREO as of Q3 2025.

  • Deerfield Management reported no remaining Mereo BioPharma position as of Q3 2025 after selling out during the quarter.
  • Deerfield Management sold 6,710,429 Mereo BioPharma shares in Q3 2025, an estimated $18.2M.
  • Deerfield Management first reported a position in Mereo BioPharma in Q2 2024 and held it in 5 quarters.
  • Deerfield Management's Mereo BioPharma position peaked at $27.6M in Q3 2024.
  • 84 funds tracked by Wall St. Rank held Mereo BioPharma as of Q3 2025.

Based on Deerfield Management's 13F filing for Q3 2025, filed 14 Nov 2025.