XT
MREO

XTX Topco’s Mereo BioPharma MREO Stock Holding History

XTX Topco’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
2026
Q1 		$27.9K Buy
+84,469
New +$36.2K ﹤0.01% 3473
2025
Q4 		– Sell
-191,037
Closed -$394K – 3619
2025
Q3 		$394K Buy
191,037
+121,696
+176% +$224K 0.02% 1276
2025
Q2 		$188K Buy
+69,341
New +$167K 0.01% 1728
2025
Q1 		– Sell
-37,974
Closed -$133K – 2824
2024
Q4 		$133K Buy
+37,974
New +$149K 0.01% 1706
2023
Q4 		– Sell
-11,313
Closed -$14.6K – 1911
2023
Q3 		$14.6K Buy
+11,313
New +$15K ﹤0.01% 1397

Other funds holding MREO

RCMNY
Rubric Capital Management (New York) New York $9.44B AUM 68.42% 1-Year Est. Return
EC
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
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return
DCM
Defilade Capital Management Emeryville, California $712M AUM
NM
Newtyn Management New York $936M AUM 27.23% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return
TC
Tejara Capital London, United Kingdom $303M AUM 5.43% 1-Year Est. Return
UBS Group
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

XTX Topco's MREO Position: Q1 2026 in Review

XTX Topco opened a new position in Mereo BioPharma (MREO) in Q1 2026: 84,469 shares worth $27.9K. The stake represents ﹤0.01% of the portfolio and ranks #3473 among its holdings. This is a return to the name: XTX Topco previously reported a position in MREO as recently as Q3 2025.

XTX Topco first reported a position in MREO in Q3 2023 and has held it in 5 quarters since. The position peaked at $394K in Q3 2025. 63 funds tracked by Wall St. Rank hold MREO as of Q1 2026.

  • XTX Topco held 84,469 shares of Mereo BioPharma worth $27.9K as of Q1 2026.
  • Mereo BioPharma was a new XTX Topco position in Q1 2026.
  • Mereo BioPharma made up ﹤0.01% of XTX Topco's portfolio in Q1 2026, its #3473 holding.
  • XTX Topco first reported a position in Mereo BioPharma in Q3 2023 and has held it in 5 quarters since.
  • XTX Topco's Mereo BioPharma position peaked at $394K in Q3 2025.
  • 63 funds tracked by Wall St. Rank held Mereo BioPharma as of Q1 2026.

Based on XTX Topco's 13F filing for Q1 2026, filed 15 May 2026.