Vanguard Group’s OS Therapies Inc OSTX Stock Holding History

Vanguard Group’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
2025 Q4	$757K	Buy	540,421 +352,158	+187%	+$635K	﹤0.01%	3844
2025 Q3	$369K	Buy	+188,263	New	+$373K	﹤0.01%	4015

Other funds holding OSTX

CM Management Gulf Breeze, Florida $120M AUM 37.12% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Marshall Wace London, United Kingdom $100B AUM 35.1% 1-Year Est. Return

Two Sigma Investments New York $124B AUM 33.93% 1-Year Est. Return

Northern Trust Chicago, Illinois $757B AUM 28.64% 1-Year Est. Return

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

ISL

Ingalls & Snyder LLC New York $2.83B AUM 21.61% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Jane Street New York $777B AUM 61.18% 1-Year Est. Return

Vanguard Group's OSTX Position: Q4 2025 in Review

Vanguard Group increased its OS Therapies Inc (OSTX) stake by 187% in Q4 2025, buying an estimated $635K and bringing the position to 540,421 shares worth $757K. The position accounts for ﹤0.01% of the portfolio, ranked #3844.

Vanguard Group first reported a position in OSTX in Q3 2025 and has held it in 2 quarters since. 25 funds tracked by Wall St. Rank hold OSTX as of Q4 2025.

Vanguard Group held 540,421 shares of OS Therapies Inc worth $757K as of Q4 2025.
Vanguard Group bought 352,158 OS Therapies Inc shares in Q4 2025, an estimated $635K.
OS Therapies Inc made up ﹤0.01% of Vanguard Group's portfolio in Q4 2025, its #3844 holding.
Vanguard Group first reported a position in OS Therapies Inc in Q3 2025 and has held it in 2 quarters since.
25 funds tracked by Wall St. Rank held OS Therapies Inc as of Q4 2025.

Based on Vanguard Group's 13F filing for Q4 2025, filed 29 Jan 2026.