Simplex Trading
MBX

Simplex Trading’s MBX Biosciences MBX Stock Holding History

Simplex Trading’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
Q2 		$73.3K Buy
1,327
+20
+2% +$699 ﹤0.01% 5910
2026
Q1 		$39K Sell
1,307
-7,618
-85% -$259K ﹤0.01% 6127
2025
Q4 		$281K Buy
+8,925
New +$217K ﹤0.01% 3884
2025
Q3 		– Sell
-411
Closed -$5.5K – 10310
2025
Q2 		$4K Buy
+411
New +$4.19K ﹤0.01% 7921

Other funds holding MBX

FLSM
Frazier Life Sciences Management Palo Alto, California $4.59B AUM 237.58% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $580B AUM 38.23% 1-Year Est. Return
NMC
NEA Management Company Timonium, Maryland $1.59B AUM 234.06% 1-Year Est. Return
O
OrbiMed New York $5.4B AUM 163.13% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
PBA
Paradigm Biocapital Advisors New York $5.34B AUM 380.18% 1-Year Est. Return
NA
NVP Associates Menlo Park, California $328M AUM 166.51% 1-Year Est. Return
DTC
Deep Track Capital Greenwich, Connecticut $6.87B AUM 205.24% 1-Year Est. Return
PCH
Polar Capital Holdings London, United Kingdom $42.4B AUM 181.11% 1-Year Est. Return

Simplex Trading's MBX Position: Q2 2026 in Review

Simplex Trading increased its MBX Biosciences (MBX) stake by 1.5% in Q2 2026, buying an estimated $699 and bringing the position to 1,327 shares worth $73.3K. The position accounts for ﹤0.01% of the portfolio, ranked #5910.

Simplex Trading first reported a position in MBX in Q2 2025 and has held it in 4 quarters since. The position peaked at $281K in Q4 2025. 173 funds tracked by Wall St. Rank hold MBX as of Q2 2026.

  • Simplex Trading held 1,327 shares of MBX Biosciences worth $73.3K as of Q2 2026.
  • Simplex Trading bought 20 MBX Biosciences shares in Q2 2026, an estimated $699.
  • MBX Biosciences made up ﹤0.01% of Simplex Trading's portfolio in Q2 2026, its #5910 holding.
  • Simplex Trading first reported a position in MBX Biosciences in Q2 2025 and has held it in 4 quarters since.
  • Simplex Trading's MBX Biosciences position peaked at $281K in Q4 2025.
  • 173 funds tracked by Wall St. Rank held MBX Biosciences as of Q2 2026.

Based on Simplex Trading's 13F filing for Q2 2026, filed 12 Aug 2026.