Citius Oncology, Inc. (CTOR) Ownership
CTOR ownership summary
as of October 18, 2026- Institutions
- 15.2% of shares outstanding
- Insiders
- 77.51% of shares outstanding
- Shares outstanding
- 105.8M
- Float
- 31.0M shares available to trade
- Short interest
- 0.98% 290K shares short
- Days to cover
- 2.86 short interest down 43.1% vs prior month
- Institutions 15.21%
- Insiders 77.51%
- Other investors 7.28%
CTOR top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Armistice Capital, LLC | 8.23% | 8.7M | $6.7M | −483,266 (−5.3%) | June 30, 2026 |
| 2 | Bank of America Corp | 3.63% | 3.8M | $2.9M | — | June 30, 2026 |
| 3 | Vanguard Capital Management, LLC | 0.52% | 546K | $419,578 | +11,501 (+2.2%) | June 30, 2026 |
| 4 | UBS Group AG | 0.32% | 335K | $256,987 | +297,779 (+808.3%) | June 30, 2026 |
| 5 | Geode Capital Management, LLC | 0.23% | 245K | $188,473 | −19,326 (−7.3%) | June 30, 2026 |
| 6 | Vanguard Fiduciary Trust Co | 0.12% | 122K | $93,627 | — | June 30, 2026 |
| 7 | IFP Advisors, LLC | 0.10% | 107K | $82,502 | — | June 30, 2026 |
| 8 | Citadel Advisors Llc | 0.09% | 91K | $69,570 | +90,586 (0.0%) | June 30, 2026 |
| 9 | Northern Trust Corp | 0.04% | 46K | $35,133 | — | June 30, 2026 |
| 10 | State Street Corp | 0.04% | 43K | $32,947 | — | June 30, 2026 |
| 11 | Virtu Financial LLC | 0.02% | 22K | $16,802 | +21,877 (0.0%) | June 30, 2026 |
| 12 | XTX Topco Ltd | 0.02% | 21K | $15,850 | +20,638 (0.0%) | June 30, 2026 |
| 13 | Tower Research Capital LLC | 0.01% | 14K | $10,611 | +13,816 (0.0%) | June 30, 2026 |
| 14 | Arkadios Wealth Advisors | 0.01% | 12K | $8,959 | — | June 30, 2026 |
| 15 | Advisor Group Holdings, Inc. | <0.01% | 1,000 | $768 | −9,125 (−90.1%) | June 30, 2026 |
| 16 | Wells Fargo & Co | <0.01% | 500 | $384 | +500 (0.0%) | June 30, 2026 |
| 17 | Mercer Global Advisors Inc. | <0.01% | 200 | $154 | +200 (0.0%) | June 30, 2026 |
| 18 | Royal Bank of Canada | <0.01% | 186 | $143 | +163 (+708.7%) | March 31, 2026 |
| 19 | Barclays PLC | <0.01% | 90 | $69 | +90 (0.0%) | June 30, 2026 |
| 20 | Morgan Stanley - Brokerage Accounts | 0.00% | 23 | $18 | +23 (0.0%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 11 holders added 457K shares and 3 cut 512K.
CTOR top mutual fund and ETF holders
5 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 0.35% | 370K | $284,237 | — | August 31, 2026 |
| 2 | Fidelity Extended Market Index | 0.09% | 97K | $74,872 | −524 (−0.5%) | August 31, 2026 |
| 3 | Fidelity Nasdaq Composite Index | 0.05% | 55K | $42,033 | — | August 31, 2026 |
| 4 | Fidelity Total Market Index | 0.02% | 26K | $20,191 | — | August 31, 2026 |
| 5 | Fidelity Series Total Market Index | 0.02% | 23K | $17,965 | — | August 31, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
CTOR shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns CTOR
Institutional investors own 15.2% of Citius Oncology's shares and insiders 77.51%. The largest holder is Armistice Capital, LLC with 8.23% of the shares (8.7M), as of June 30, 2026. Among the top 20 institutions, 11 added shares and 3 reduced their stake in the latest filings. Short interest is 0.98% of the float, or 2.86 days of average trading volume. The share count rose 4,273.1% since 2021.
Related: CTOR analyst forecast, CTOR key metrics. See the CTOR stock overview for the latest quote and news.
CTOR ownership FAQ
Who owns the most Citius Oncology stock?
The largest shareholders of Citius Oncology are Armistice Capital, LLC (8.23%), Bank of America Corp (3.63%), Vanguard Capital Management, LLC (0.52%), UBS Group AG (0.32%), Geode Capital Management, LLC (0.23%).
What percentage of Citius Oncology is owned by institutions?
Institutions hold 15.2% of Citius Oncology's shares outstanding; insiders hold 77.51%.
Which funds own Citius Oncology?
The largest fund holders of Citius Oncology are Vanguard MStar Total Stk Mkt Idx Invest (0.35%), Fidelity Extended Market Index (0.09%), Fidelity Nasdaq Composite Index (0.05%), Fidelity Total Market Index (0.02%), Fidelity Series Total Market Index (0.02%).
What is Citius Oncology's short interest?
290K shares of Citius Oncology were sold short, 0.98% of the float; at the average daily volume it would take 2.86 days to cover.
How many shares of Citius Oncology are outstanding?
Citius Oncology has 105.8M shares outstanding, of which 31.0M are in the public float.