California State Teachers Retirement System (CalSTRS)
MBX

California State Teachers Retirement System (CalSTRS)’s MBX Biosciences MBX Stock Holding History

California State Teachers Retirement System (CalSTRS)’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 		$1.29M Buy
23,376
+611
+3% +$21.3K ﹤0.01% 1824
2026
Q1 		$680K Buy
22,765
+21,011
+1,198% +$715K ﹤0.01% 1950
2025
Q4 		$55.3K Buy
1,754
+689
+65% +$16.7K ﹤0.01% 2291
2025
Q3 		$18.6K Buy
1,065
+1
+0.1% +$13 ﹤0.01% 2581
2025
Q2 		$12.1K Buy
1,064
+232
+28% +$2.36K ﹤0.01% 2667
2025
Q1 		$6.14K Hold
832
– – ﹤0.01% 2885
2024
Q4 		$15.3K Buy
+832
New +$17.7K ﹤0.01% 2701

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

California State Teachers Retirement System (CalSTRS)'s MBX Position: Q2 2026 in Review

California State Teachers Retirement System (CalSTRS) increased its MBX Biosciences (MBX) stake by 2.7% in Q2 2026, buying an estimated $21.3K and bringing the position to 23,376 shares worth $1.29M. The position accounts for ﹤0.01% of the portfolio, ranked #1824.

California State Teachers Retirement System (CalSTRS) first reported a position in MBX in Q4 2024 and has held it in 7 quarters since. 173 funds tracked by Wall St. Rank hold MBX as of Q2 2026.

  • California State Teachers Retirement System (CalSTRS) held 23,376 shares of MBX Biosciences worth $1.29M as of Q2 2026.
  • California State Teachers Retirement System (CalSTRS) bought 611 MBX Biosciences shares in Q2 2026, an estimated $21.3K.
  • MBX Biosciences made up ﹤0.01% of California State Teachers Retirement System (CalSTRS)'s portfolio in Q2 2026, its #1824 holding.
  • California State Teachers Retirement System (CalSTRS) first reported a position in MBX Biosciences in Q4 2024 and has held it in 7 quarters since.
  • 173 funds tracked by Wall St. Rank held MBX Biosciences as of Q2 2026.

Based on California State Teachers Retirement System (CalSTRS)'s 13F filing for Q2 2026, filed 24 Aug 2026.