Marshall Wace
MBX

Marshall Wace’s MBX Biosciences MBX Stock Holding History

Marshall Wace’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 		$1.87M Buy
+62,703
New +$2.13M ﹤0.01% 1827
2025
Q2 		– Sell
-111,211
Closed -$821K – 3281
2025
Q1 		$821K Buy
111,211
+85,311
+329% +$902K ﹤0.01% 1866
2024
Q4 		$477K Buy
25,900
+13,900
+116% +$296K ﹤0.01% 2047
2024
Q3 		$312K Buy
+12,000
New +$274K ﹤0.01% 2122

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

Marshall Wace's MBX Position: Q1 2026 in Review

Marshall Wace opened a new position in MBX Biosciences (MBX) in Q1 2026: 62,703 shares worth $1.87M. The stake represents ﹤0.01% of the portfolio and ranks #1827 among its holdings. This is a return to the name: Marshall Wace previously reported a position in MBX as recently as Q1 2025.

Marshall Wace first reported a position in MBX in Q3 2024 and has held it in 4 quarters since. 157 funds tracked by Wall St. Rank hold MBX as of Q1 2026.

  • Marshall Wace held 62,703 shares of MBX Biosciences worth $1.87M as of Q1 2026.
  • MBX Biosciences was a new Marshall Wace position in Q1 2026.
  • MBX Biosciences made up ﹤0.01% of Marshall Wace's portfolio in Q1 2026, its #1827 holding.
  • Marshall Wace first reported a position in MBX Biosciences in Q3 2024 and has held it in 4 quarters since.
  • 157 funds tracked by Wall St. Rank held MBX Biosciences as of Q1 2026.

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