OS Therapies OSTX Institutional Ownership

NYSE OSTX

$1.63 +0.01 (+0.93%)

As of: Sep 30, 2026 · 3:59 PM EDT

Institutions by Trading Activity

30 Institutions

Increased 21 70.0%

Unchanged 5 16.7%

Reduced 4 13.3%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

60.66%

▼-0.03 pp QoQ

Shares Held by Institutions

2.90Mn

of 4.77Mn outstanding

▲+2.71% QoQ

Shares Outstanding

4.77Mn

1.88Mn held outside 13F filers

Institutional Investors

filed 13F for Jun 2026

▲+1 vs prior quarter

Net Shares Added (QoQ)

+76.42K

accumulated since last quarter

Value of Holdings

$4.66Mn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

OS Therapies Inc (NYSE:OSTX) showed up in the 13F filings of 30 institutional investors as of June 2026.

Collectively, these holders controlled 60.7% of OS Therapies's outstanding shares in June 2026, down from 60.7% in March 2026.
They increased total shares held in OS Therapies by 2.71% from last quarter, and the number of investors in OSTX increased 130.77% annually.
During the quarter, 21 of these 30 funds increased positions in OSTX, 4 reduced exposure, and 5 held steady.
Institutional investors collectively held 2.9Mn shares in OS Therapies as of June 2026, up by 76.42K shares quarter on quarter, and up 2.29Mn shares year over year.
As of June 30, 2026, VANGUARD CAPITAL MANAGEMENT LLC held the largest stake in OS Therapies with 777.65K shares, accounting for 16.29% of total shares outstanding.
The largest buyers of OS Therapies for the quarter ending June 2026 were VANGUARD CAPITAL MANAGEMENT LLC (308.18K), BlackRock, Inc. (177.71K), MARSHALL WACE, LLP (100.64K), HighTower Advisors, LLC (70.35K), VANGUARD FIDUCIARY TRUST CO (57.47K).
Top sellers of OSTX stock for the quarter ending June 2026 included SUSQUEHANNA INTERNATIONAL GROUP, LLP (435.2K), UBS Group AG (339.86K), JANE STREET GROUP, LLC (13.32K), MERCER GLOBAL ADVISORS INC /ADV (10.09K).
Per Business Quant, the top 10 investors in OSTX for the quarter ending June 2026 include VANGUARD CAPITAL MANAGEMENT LLC (777.65K), CM Management, LLC (400.0K), GEODE CAPITAL MANAGEMENT, LLC (301.79K), HOWARD FINANCIAL SERVICES, LTD. (248.0K), BlackRock, Inc. (242.48K), VANGUARD FIDUCIARY TRUST CO (174.13K), State Street Corp (120.1K), MARSHALL WACE, LLP (100.64K), HighTower Advisors, LLC (85.55K), Northern Trust Corp (70.82K).

Form 13F Holdings

30 Institutional Holders

Report period 30 Jun, 2026

Total shares held 2.90Mn

Of outstanding 60.66%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	777,651	16.29%	▲308,184	+65.65%	$1.48Mn
2	CM Management, LLC	0001841857	400,000	8.38%	0	0.00%	$760.00K
3	GEODE CAPITAL MANAGEMENT, LLC	0001214717	301,794	6.32%	▲21,749	+7.77%	$573.41K
4	HOWARD FINANCIAL SERVICES, LTD.	0001768130	248,001	5.19%	▲2,565	+1.05%	$471.20K
5	BlackRock, Inc.	0002012383	242,479	5.08%	▲177,707	+274.36%	$460.71K
6	VANGUARD FIDUCIARY TRUST CO	0000933478	174,132	3.65%	▲57,469	+49.26%	$330.85K
7	State Street Corp	0000093751	120,100	2.52%	▲28,900	+31.69%	$228.19K
8	MARSHALL WACE, LLP	0001318757	100,640	2.11%	▲100,640	0.00%	$191.22K
9	HighTower Advisors, LLC	0001462245	85,550	1.79%	▲70,350	+462.83%	$162.55K
10	Northern Trust Corp	0000073124	70,817	1.48%	▲4,763	+7.21%	$134.55K
11	Beacon Pointe Advisors, LLC	0001744317	62,507	1.31%	0	0.00%	$118.76K
12	BRIDGEWAY CAPITAL MANAGEMENT, LLC	0001107261	45,000	0.94%	▲20,000	+80.00%	$85.50K
13	INGALLS & SNYDER LLC	0001041885	36,676	0.77%	0	0.00%	$70
14	TWO SIGMA INVESTMENTS, LP	0001179392	30,414	0.64%	▲4,034	+15.29%	$57.79K
15	Stifel Financial Corp	0000720672	27,900	0.58%	▲12,900	+86.00%	$53.01K
16	JANE STREET GROUP, LLC	0001595888	26,999	0.57%	▼13,317	-33.03%	$51.30K
17	AXQ CAPITAL, LP	0001916908	24,623	0.52%	▲24,623	0.00%	$46.78K
18	Vanguard Global Advisers, LLC	0001811242	20,958	0.44%	0	0.00%	$39.82K
19	Stratos Wealth Advisors, LLC	0001707202	19,314	0.40%	▲5,497	+39.78%	$36.70K
20	Quadrature Capital Ltd	0001651424	15,662	0.33%	▲15,662	0.00%	$29.76K

Showing 1 to 20 of 30 holders