Bank of America
MBX

Bank of America’s MBX Biosciences MBX Stock Holding History

Bank of America’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 		$858K Sell
28,750
-9,144
-24% -$311K ﹤0.01% 4591
2025
Q4 		$1.2M Buy
37,894
+11,278
+42% +$274K ﹤0.01% 4412
2025
Q3 		$466K Sell
26,616
-15,771
-37% -$211K ﹤0.01% 5833
2025
Q2 		$484K Buy
42,387
+14,297
+51% +$146K ﹤0.01% 5731
2025
Q1 		$207K Buy
28,090
+12,031
+75% +$127K ﹤0.01% 6155
2024
Q4 		$296K Buy
+16,059
New +$342K ﹤0.01% 5889

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

Bank of America's MBX Position: Q1 2026 in Review

Bank of America reduced its MBX Biosciences (MBX) stake by 24% in Q1 2026, selling an estimated $311K and leaving 28,750 shares worth $858K. The position accounts for ﹤0.01% of the portfolio, ranked #4591.

Bank of America first reported a position in MBX in Q4 2024 and has held it in 6 quarters since. The position peaked at $1.2M in Q4 2025. 157 funds tracked by Wall St. Rank hold MBX as of Q1 2026.

  • Bank of America held 28,750 shares of MBX Biosciences worth $858K as of Q1 2026.
  • Bank of America sold 9,144 MBX Biosciences shares in Q1 2026, an estimated $311K.
  • MBX Biosciences made up ﹤0.01% of Bank of America's portfolio in Q1 2026, its #4591 holding.
  • Bank of America first reported a position in MBX Biosciences in Q4 2024 and has held it in 6 quarters since.
  • Bank of America's MBX Biosciences position peaked at $1.2M in Q4 2025.
  • 157 funds tracked by Wall St. Rank held MBX Biosciences as of Q1 2026.

Based on Bank of America's 13F filing for Q1 2026, filed 18 May 2026.