Millennium Management’s Mereo BioPharma MREO Stock Holding History

Millennium 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 Q4	–	Sell	-57,700	Closed	-$119K	–	6297
2025 Q3	$119K	Sell	57,700 -231,000	-80%	-$426K	﹤0.01%	5667
2025 Q2	$782K	Hold	288,700	–	–	﹤0.01%	4594
2025 Q1	$650K	Buy	288,700 +241,000	+505%	+$682K	﹤0.01%	4651
2024 Q4	$167K	Buy	+47,700	New	+$187K	﹤0.01%	5359

Other funds holding MREO

RCMNY

Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return

EcoR1 Capital San Francisco, California $2.36B AUM 204.53% 1-Year Est. Return

6CM

683 Capital Management New York $1.92B AUM 85.52% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

DCM

Defilade Capital Management Emeryville, California $712M AUM

Newtyn Management New York $936M AUM 27.23% 1-Year Est. Return

Tejara Capital London, United Kingdom $303M AUM 5.43% 1-Year Est. Return

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

WANY

Wealthspire Advisors (New York) New York $12.7B AUM 17.31% 1-Year Est. Return

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

Millennium Management's MREO Position: Q1 2026 in Review

Millennium Management increased its Mereo BioPharma (MREO) stake by 4,155% in Q1 2026, buying an estimated $1.49M and bringing the position to 3,559,103 shares worth $1.17M. The position accounts for ﹤0.01% of the portfolio, ranked #4276.

Millennium Management first reported a position in MREO in Q4 2020 and has held it in 22 quarters since. The position peaked at $22.2M in Q3 2024. 63 funds tracked by Wall St. Rank hold MREO as of Q1 2026.

Millennium Management held 3,559,103 shares of Mereo BioPharma worth $1.17M as of Q1 2026.
Millennium Management bought 3,475,457 Mereo BioPharma shares in Q1 2026, an estimated $1.49M.
Mereo BioPharma made up ﹤0.01% of Millennium Management's portfolio in Q1 2026, its #4276 holding.
Millennium Management first reported a position in Mereo BioPharma in Q4 2020 and has held it in 22 quarters since.
Millennium Management's Mereo BioPharma position peaked at $22.2M in Q3 2024.
63 funds tracked by Wall St. Rank held Mereo BioPharma as of Q1 2026.

Based on Millennium Management's 13F filing for Q1 2026, filed 15 May 2026.