Russell Investments Group
MBX

Russell Investments Group’s MBX Biosciences MBX Stock Holding History

Russell Investments Group’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 		$115K Buy
3,856
+1,000
+35% +$34K ﹤0.01% 3044
2025
Q4 		$90.1K Buy
2,856
+1,375
+93% +$33.4K ﹤0.01% 3077
2025
Q3 		$25.9K Buy
1,481
+1,446
+4,131% +$19.3K ﹤0.01% 3516
2025
Q2 		$399 Buy
+35
New +$357 ﹤0.01% 3763

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

Russell Investments Group's MBX Position: Q1 2026 in Review

Russell Investments Group increased its MBX Biosciences (MBX) stake by 35% in Q1 2026, buying an estimated $34K and bringing the position to 3,856 shares worth $115K. The position accounts for ﹤0.01% of the portfolio, ranked #3044.

Russell Investments Group first reported a position in MBX in Q2 2025 and has held it in 4 quarters since. 157 funds tracked by Wall St. Rank hold MBX as of Q1 2026.

  • Russell Investments Group held 3,856 shares of MBX Biosciences worth $115K as of Q1 2026.
  • Russell Investments Group bought 1,000 MBX Biosciences shares in Q1 2026, an estimated $34K.
  • MBX Biosciences made up ﹤0.01% of Russell Investments Group's portfolio in Q1 2026, its #3044 holding.
  • Russell Investments Group first reported a position in MBX Biosciences in Q2 2025 and has held it in 4 quarters since.
  • 157 funds tracked by Wall St. Rank held MBX Biosciences as of Q1 2026.

Based on Russell Investments Group's 13F filing for Q1 2026, filed 8 May 2026.