BlackRock
OSTX

BlackRock’s OS Therapies Inc OSTX Stock Holding History

BlackRock’s Portfolio OSTX Stock Details OSTX Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q2 		$461K Buy
242,479
+177,707
+274% +$298K ﹤0.01% 4598
2026
Q1 		$91.3K Buy
64,772
+3,347
+5% +$4.75K ﹤0.01% 4977
2025
Q4 		$86K Buy
61,425
+13,262
+28% +$23.9K ﹤0.01% 4938
2025
Q3 		$94.4K Buy
48,163
+17,882
+59% +$35.4K ﹤0.01% 4842
2025
Q2 		$56.9K Sell
30,281
-7,226
-19% -$12.2K ﹤0.01% 4965
2025
Q1 		$57.8K Buy
37,507
+34,364
+1,093% +$80.6K ﹤0.01% 4886
2024
Q4 		$13.5K Buy
+3,143
New +$9.21K ﹤0.01% 5149

Other funds holding OSTX

HFS
Howard Financial Services Dallas, Texas $1B AUM 20.02% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
HighTower Advisors
HighTower Advisors Chicago, Illinois $103B AUM 28.65% 1-Year Est. Return
AC
AXQ Capital Jersey City, New Jersey $920M AUM 18.71% 1-Year Est. Return
QC
Quadrature Capital London, United Kingdom $11.7B AUM 87.29% 1-Year Est. Return
AAG
Armstrong Advisory Group Needham, Massachusetts $1.64B AUM 19.37% 1-Year Est. Return
CIAM
Caitong International Asset Management Hong Kong $729M AUM 1,176.98% 1-Year Est. Return

BlackRock's OSTX Position: Q2 2026 in Review

BlackRock increased its OS Therapies Inc (OSTX) stake by 274% in Q2 2026, buying an estimated $298K and bringing the position to 242,479 shares worth $461K. The position accounts for ﹤0.01% of the portfolio, ranked #4598.

BlackRock first reported a position in OSTX in Q4 2024 and has held it in 7 quarters since. 8 funds tracked by Wall St. Rank hold OSTX as of Q2 2026.

  • BlackRock held 242,479 shares of OS Therapies Inc worth $461K as of Q2 2026.
  • BlackRock bought 177,707 OS Therapies Inc shares in Q2 2026, an estimated $298K.
  • OS Therapies Inc made up ﹤0.01% of BlackRock's portfolio in Q2 2026, its #4598 holding.
  • BlackRock first reported a position in OS Therapies Inc in Q4 2024 and has held it in 7 quarters since.
  • 8 funds tracked by Wall St. Rank held OS Therapies Inc as of Q2 2026.

Based on BlackRock's 13F filing for Q2 2026, filed 7 Aug 2026.