Jane Street’s OS Therapies Inc OSTX Stock Holding History

Jane Street’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 Q1	$56.8K	Buy	40,316 +12,576	+45%	+$17.9K	﹤0.01%	10920
2025 Q4	$38.8K	Buy	+27,740	New	+$50K	﹤0.01%	10573

Other funds holding OSTX

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Susquehanna International Group Bala Cynwyd, Pennsylvania $893B AUM 36.07% 1-Year Est. Return

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

UBS Group Zurich, Switzerland $666B AUM 30.12% 1-Year Est. Return

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

HFS

Howard Financial Services Dallas, Texas $1B AUM 20.02% 1-Year Est. Return

VFT

Vanguard Fiduciary Trust Malvern, Pennsylvania $396B AUM

State Street Boston, Massachusetts $2.9T AUM 29.55% 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

Jane Street's OSTX Position: Q1 2026 in Review

Jane Street increased its OS Therapies Inc (OSTX) stake by 45% in Q1 2026, buying an estimated $17.9K and bringing the position to 40,316 shares worth $56.8K. The position accounts for ﹤0.01% of the portfolio, ranked #10920.

Jane Street first reported a position in OSTX in Q4 2025 and has held it in 2 quarters since. 29 funds tracked by Wall St. Rank hold OSTX as of Q1 2026.

Jane Street held 40,316 shares of OS Therapies Inc worth $56.8K as of Q1 2026.
Jane Street bought 12,576 OS Therapies Inc shares in Q1 2026, an estimated $17.9K.
OS Therapies Inc made up ﹤0.01% of Jane Street's portfolio in Q1 2026, its #10920 holding.
Jane Street first reported a position in OS Therapies Inc in Q4 2025 and has held it in 2 quarters since.
29 funds tracked by Wall St. Rank held OS Therapies Inc as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.