Barclays
MBX

Barclays’s MBX Biosciences MBX Stock Holding History

Barclays’s Portfolio MBX Stock Details MBX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$353K Sell
11,838
-40,853
-78% -$1.39M ﹤0.01% 3376
2025
Q4 		$1.66M Buy
52,691
+31,065
+144% +$754K ﹤0.01% 3063
2025
Q3 		$378K Sell
21,626
-36,915
-63% -$494K ﹤0.01% 3969
2025
Q2 		$668K Buy
58,541
+46,723
+395% +$476K ﹤0.01% 3590
2025
Q1 		$87.2K Sell
11,818
-5,615
-32% -$59.4K ﹤0.01% 4453
2024
Q4 		$321K Buy
17,433
+1,033
+6% +$22K ﹤0.01% 4082
2024
Q3 		$426K Buy
+16,400
New +$375K ﹤0.01% 3879

Other funds holding MBX

FLSM
Frazier Life Sciences Management Palo Alto, California $3.89B AUM 201.1% 1-Year Est. Return
O
OrbiMed New York $5.05B AUM 125.28% 1-Year Est. Return
NMC
NEA Management Company Timonium, Maryland $1.76B AUM 223.33% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.12B AUM 144% 1-Year Est. Return
NA
NVP Associates Menlo Park, California $176M AUM 208.78% 1-Year Est. Return
PCH
Polar Capital Holdings London, United Kingdom $28.2B AUM 115.26% 1-Year Est. Return
B
Braidwell Stamford, Connecticut $3B AUM 46.72% 1-Year Est. Return

Barclays's MBX Position: Q1 2026 in Review

Barclays reduced its MBX Biosciences (MBX) stake by 78% in Q1 2026, selling an estimated $1.39M and leaving 11,838 shares worth $353K. The position accounts for ﹤0.01% of the portfolio, ranked #3376.

Barclays first reported a position in MBX in Q3 2024 and has held it in 7 quarters since. The position peaked at $1.66M in Q4 2025. 157 funds tracked by Wall St. Rank hold MBX as of Q1 2026.

  • Barclays held 11,838 shares of MBX Biosciences worth $353K as of Q1 2026.
  • Barclays sold 40,853 MBX Biosciences shares in Q1 2026, an estimated $1.39M.
  • MBX Biosciences made up ﹤0.01% of Barclays's portfolio in Q1 2026, its #3376 holding.
  • Barclays first reported a position in MBX Biosciences in Q3 2024 and has held it in 7 quarters since.
  • Barclays's MBX Biosciences position peaked at $1.66M in Q4 2025.
  • 157 funds tracked by Wall St. Rank held MBX Biosciences as of Q1 2026.

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