Citius Oncology, Inc.
Citius Oncology, Inc. (CTOR) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · CTOR · as of Sep 30, 2025
Ownership Breakdown
16
Institutional Holders
▲ 9 vs Q2
$16.97M
Total Inst. Value
▲ $15.98M vs Q2
92.98M
Shares Outstanding
freeFloat 5.39%
8.36M
13F Shares Held
▲ 8.13M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
CTOR largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
ARMISTICE CAPITAL, LLC | 7.68M | 10.48% | 10.48% | $15.58B | Nov 17, 2025 | NEW |
VANGUARD GROUP INC | 180.2K | 24.59% | 24.59% | $365.74M | Nov 7, 2025 | NEW |
GEODE CAPITAL MANAGEMENT, LLC | 167.2K | 22.82% | 22.82% | $339.36M | Nov 12, 2025 | ▲ 109.9K |
XTX TOPCO LTD | 126.9K | 17.32% | 17.32% | $257.57M | Nov 14, 2025 | NEW |
RENAISSANCE TECHNOLOGIES LLC | 55.9K | 7.63% | 7.63% | $113.48M | Nov 13, 2025 | NEW |
STATE STREET CORP | 42.9K | 5.86% | 5.86% | $87.09M | Nov 14, 2025 | NEW |
IFP ADVISORS, INC | 33.2K | 4.53% | 4.53% | $67.43M | Feb 6, 2026 | ▲ 11.0K |
NORTHERN TRUST CORP | 21.8K | 2.97% | 2.97% | $44.18M | Nov 14, 2025 | NEW |
CITADEL ADVISORS LLC | 17.7K | 2.41% | 2.41% | $35.85M | Nov 14, 2025 | NEW |
TOWER RESEARCH CAPITAL LLC (TRC) | 11.8K | 1.62% | 1.62% | $24.05M | Nov 14, 2025 | NEW |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
3
Increased
+127.3K shares10
New Positions
first time holders2
Decreased
−23.7K shares1
Sold Out
fully exitedNet shares change (top 50)
+103.6K
+127.3K / −23.7K
Net new holders
+10
10 new / 1 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
CTOR insider trading · insider activity
Source: SEC Form 4
7
Buy transactions
1
Sell transactions
7.00
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
HOLUBIAK MYRON Z Secretary | Sep 19, 2025 | Award | 850,000 | — | — | 850.0K | Form 4 ↗ |
HOLUBIAK MYRON Z Secretary | Sep 19, 2025 | Award | 100,000 | — | — | 100.0K | Form 4 ↗ |
Smith Robert Joseph director | Sep 19, 2025 | Award | 300,000 | — | — | 300.0K | Form 4 ↗ |
Mazur Leonard L Chief Executive Officer | Sep 19, 2025 | Award | 1,700,000 | — | — | 1.70M | Form 4 ↗ |
Webb Carol director | Sep 19, 2025 | Award | 300,000 | — | — | 300.0K | Form 4 ↗ |
Czuczman Myron Chief Medical Officer | Sep 19, 2025 | Award | 825,000 | — | — | 825.0K | Form 4 ↗ |
MCGRATH DENNIS M director | Sep 19, 2025 | Award | 300,000 | — | — | 300.0K | Form 4 ↗ |
Bartushak Jaime Chief Financial Officer | Sep 19, 2025 | Award | 825,000 | — | — | 825.0K | Form 4 ↗ |
Mayersohn Joel David director | Sep 19, 2025 | Award | 300,000 | — | — | 321.2K | Form 4 ↗ |
Dutia Suren G director | Sep 19, 2025 | Award | 300,000 | — | — | 300.0K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Citius Oncology, Inc. (CTOR) is primarily owned by institutional investors, who hold approximately 9.0% of total shares outstanding. Company insiders own approximately 94.61%, while retail and public investors account for the remaining 0.00%.
The largest institutional shareholder of Citius Oncology, Inc. is ARMISTICE CAPITAL, LLC, holding approximately 7.68 million shares — equal to 10.48% of outstanding shares — as of September 30, 2025.
A total of 16 institutional investors currently hold CTOR stock, with a combined institutional value of approximately $16,966,429 as of the most recent 13F filing period.
Frequently asked questions
CTOR ownershipCitius Oncology, Inc. (CTOR) is primarily owned by institutional investors, who hold approximately 9.0% of shares. The largest shareholder is ARMISTICE CAPITAL, LLC with a 10.48% stake. Company insiders hold 94.61%. Data sourced from SEC Form 13F as of September 30, 2025.