OSTX · OS Therapies Inc · Shareholders & Ownership
$1.29
+0.02 (+1.18%)
At close · Oct 20
Return incl. dividend (before tax)
Going-concern doubt
— flagged Aug 14, 2026
Substantial doubt about the company's ability to continue as a going concern.
“These factors raise substantial doubt about the Company's ability to continue as a going concern within one year after the date that the unaudited consolidated financial statements are issued.”View the 10-Q filed Aug 14, 2026
Market Cap
$58.58M
Shares
46.13M
Volume · Oct 20
206.52K
Avg daily vol (3M)
581.18K
Every disclosed holder of OSTX in one list: 13F institutions, Schedule 13D and 13G filers, insiders (Forms 3, 4 and 5) and registered funds, each from its own latest filing. Holders nest by CIK and SEC reporting links, never by name, and each is summed once.
Who Owns OSTX
13F quarter Sep 30, 2026, combined view: filers that have not filed yet carry their Jun 30, 2026 positions| Holder group | Shares | % Out |
|---|---|---|
| Institutional (13F) | 2,915,941 | 6.32% |
| Insiders (Forms 3, 4, 5) | 0 | 0.00% |
| 13D/G-only blocks | 7,957,466 | 17.25% |
| Remaining | 35,252,418 | 76.43% |
| Registered funds (N-PORT, not summed) | 1,153,382 | 2.50% |
Shares outstanding: 46,125,825, the issuer's latest cover-page count restated onto today's split basis.
Insiders are listed but not summed: the issuer has more than one class of common stock and Forms 3, 4 and 5 report one issuer-wide balance across them.
13D/G-only counts each filer's latest 13D or 13G that no 13F report of the listing contains, that names no 13F filer and that no counted insider files. Funds are never summed: their shares sit inside their advisers' 13F reports.
Holders of OSTX
| # | Holder | Shares | As of | Notes |
|---|---|---|---|---|
| 1 |
|
3,115,681 | ||
| 2 |
Shalom Auerbach
13D
CIK 2048828 · Unknown · Jul 29, 2025
|
2,677,570 | ||
| 2.1 |
|
2,687,570 | ||
| 3 |
Romness Paul A.
Insider
CIK 1974517 · Jan 22, 2026
Director, President and CEO, issuer-wide, not summed
|
2,473,000 | ||
| 4 |
|
2,164,215 | ||
| 5 |
VANGUARD CAPITAL MANAGEMENT LLC
13F
CIK 2100119 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
777,651 | ||
| 6 |
|
455,835 | ||
| 7 |
|
455,835 | ||
| 8 |
VANGUARD TOTAL STOCK MARKET INDEX FUND
Fund
S000002848 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
416,115 | ||
| 9 |
CM Management, LLC
13F
CIK 1841857 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
400,000 | ||
| 10 |
VANGUARD EXTENDED MARKET INDEX FUND
Fund
S000002841 · Registered fund · Jun 30, 2026
VANGUARD INDEX FUNDS, not summed
|
361,536 | ||
| 11 |
GEODE CAPITAL MANAGEMENT, LLC
13F
CIK 1214717 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
301,794 | ||
| 12 |
HOWARD FINANCIAL SERVICES, LTD.
13F
CIK 1768130 · Registered investment adviser · Sep 30, 2026
|
248,001 | ||
| 13 |
BlackRock, Inc.
13F
CIK 2012383 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
242,479 | ||
| 13.1 |
iShares Micro-Cap ETF
Fund
S000004439 · Registered fund · Jun 30, 2026
iShares Trust, not summed
|
110,432 | ||
| 14 |
|
225,179 | ||
| 15 |
|
200,000 | ||
| 16 |
VANGUARD FIDUCIARY TRUST CO
13F
CIK 933478 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
174,132 | ||
| 17 |
Fidelity Extended Market Index Fund
Fund
S000006021 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
145,135 | ||
| 18 |
|
120,100 | ||
| 19 |
Acevedo Christopher P.
Insider
CIK 2010225 · Jan 22, 2026
Chief Financial Officer, issuer-wide, not summed
|
109,375 | ||
| 20 |
MARSHALL WACE, LLP
13F
CIK 1318757 · Exempt reporting adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
100,640 | ||
| 21 |
HighTower Advisors, LLC
13F
CIK 1462245 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
85,550 | ||
| 22 |
NORTHERN TRUST CORP
13F
CIK 73124 · Bank · Jun 30, 2026
carried, not yet filed for the newest quarter
|
70,817 | ||
| 23 |
Beacon Pointe Advisors, LLC
13F
CIK 1744317 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
62,507 | ||
| 24 |
BRIDGEWAY CAPITAL MANAGEMENT, LLC
13F
CIK 1107261 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
45,000 | ||
| 24.1 |
Ultra-Small Company Market Fund
Fund
S000004424 · Registered fund · Jun 30, 2026
Bridgeway Funds, Inc., not summed
|
45,000 | ||
| 25 |
INGALLS & SNYDER LLC
13F
CIK 1041885 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
36,676 | ||
| 26 |
Fidelity Series Total Market Index Fund
Fund
S000065248 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
34,884 | ||
| 27 |
Fidelity Total Market Index Fund
Fund
S000006026 · Registered fund · May 31, 2026
Fidelity Concord Street Trust, not summed
|
32,844 | ||
| 28 |
TWO SIGMA INVESTMENTS, LP
13F
CIK 1179392 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
30,414 | ||
| 29 |
STIFEL FINANCIAL CORP
13F
CIK 720672 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
27,900 | ||
| 30 |
JANE STREET GROUP, LLC
13F
CIK 1595888 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
26,999 | ||
| 31 |
|
25,000 | ||
| 32 |
AXQ CAPITAL, LP
13F
CIK 1916908 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
24,623 | ||
| 33 |
Vanguard Global Advisers, LLC
13F
CIK 1811242 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
20,958 | ||
| 34 |
|
20,000 | ||
| 35 |
SANDERS MORRIS HARRIS LLC
13F
CIK 1053994 · Broker-dealer · Sep 30, 2026
|
20,000 | ||
| 36 |
Stratos Wealth Advisors, LLC
13F
CIK 1707202 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
19,314 | ||
| 37 |
Quadrature Capital Ltd
13F
CIK 1651424 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
15,662 | ||
| 38 |
JONES FINANCIAL COMPANIES LLLP
13F
CIK 815917 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
14,501 | ||
| 39 |
SUSQUEHANNA INTERNATIONAL GROUP, LLP
13F
CIK 1446194 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
13,532 | ||
| 40 |
MORGAN STANLEY
13F
CIK 895421 · Holding company · Jun 30, 2026
carried, not yet filed for the newest quarter
|
13,000 | ||
| 41 |
|
8,813 | ||
| 42 |
Rockefeller Capital Management L.P.
13F
CIK 1739439 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
7,500 | ||
| 43 |
1290 VT Micro Cap Portfolio
Fund
S000044688 · Registered fund · Jun 30, 2026
EQ Advisors Trust, not summed
|
7,436 | ||
| 44 |
Steward Partners Investment Advisory, LLC
13F
CIK 1723397 · Registered investment adviser · Jun 30, 2026
carried, not yet filed for the newest quarter
|
5,681 | ||
| 45 |
|
5,000 | ||
| 46 |
|
1,534 | ||
| 47 |
ARMSTRONG ADVISORY GROUP, INC
13F
CIK 1932952 · Registered investment adviser · Sep 30, 2026
|
100 | ||
| 48 |
Caitong International Asset Management Co., Ltd
13F
CIK 1963355 · Unknown · Jun 30, 2026
carried, not yet filed for the newest quarter
|
63 |
Shares are restated onto today's split basis. Change compares each row with the same holder's previous filing in the same source; a dash means there is none to compare. Nested 13D/G, insider and fund rows are not summed, since a 13F report already holds them.