PHIO PHARMACEUTICALS CORP PHIO
COM NEW · Common Stock · CUSIP 71880W501
- SectorHealth care
- IndustryPharmaceutical Preparations
- HeadquartersKing Of Prussia, PA
- FilingsSEC EDGAR
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once. Holder counts are more reliable. Shares outstanding: 11.6m as of 2026-08-04, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $1.02.
Trends to Q2 2026
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2024 | 7 |
| Q4 2024 | 12 |
| Q1 2025 | 12 |
| Q2 2025 | 12 |
| Q3 2025 | 11 |
| Q4 2025 | 17 |
| Q1 2026 | 24 |
| Q2 2026 | 24 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2024 | 8 | 2 |
| Q1 2025 | 7 | 6 |
| Q2 2025 | 7 | 5 |
| Q3 2025 | 7 | 4 |
| Q4 2025 | 13 | 2 |
| Q1 2026 | 17 | 6 |
| Q2 2026 | 10 | 12 |
Biggest buyers
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | New | +50.0k |
| CITADEL ADVISORS LLC | New | +47.1k |
| VANGUARD CAPITAL MANAGEMENT LLC | Added | +14.4k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC | New | +12.0k |
| CITIGROUP INC | Added | +10.6k |
| NORTHERN TRUST CORP | Added | +4.0k |
| Cetera Investment Advisers | Added | +2.5k |
| BARCLAYS PLC | New | +231 |
| SBI Securities Co., Ltd. | Added | +23 |
| Caitong International Asset Management Co., Ltd | Added | +3 |
Biggest sellers
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | -32.7k |
| Scientech Research LLC | Sold out | -30.0k |
| UBS Group AG | Reduced | -21.6k |
| HRT FINANCIAL LP | Reduced | -21.6k |
| GSA CAPITAL PARTNERS LLP | Sold out | -19.9k |
| TWO SIGMA SECURITIES, LLC | Sold out | -15.2k |
| TWO SIGMA INVESTMENTS, LP | Reduced | -11.0k |
| XTX Topco Ltd | Reduced | -6.4k |
| JANE STREET GROUP, LLC | Reduced | -1.4k |
| Tower Research Capital LLC (TRC) | Reduced | -1.4k |
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| CVI Investments, Inc. 13G · passive investor no change · filed 2026-02-17 | 9.9% |
| INTRACOASTAL CAPITAL, LLC 13G · passive investor +2.1 pts · filed 2026-02-13 | 9.1% |
Fell to 5% or below in the last year: Orca Capital AG (4.9%, 2025-12-11)
Insider purchases and sales since 1 Apr 2026
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q4 2024 | 0 | — | 0 | — | — |
| Q1 2025 | 0 | — | 0 | — | — |
| Q2 2025 | 2 | $27.0k | 0 | — | — |
| Q3 2025 | 0 | — | 0 | — | — |
| Q4 2025 | 1 | $22.3k | 0 | — | — |
| Q1 2026 | 0 | — | 0 | — | — |
| Q2 2026 | 1 | $9.9k | 0 | — | — |
| Q3 2026 | 3 | $59.0k | 0 | — | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2026-09-29 | Plott Ronald Todd Director | Bought | $5.2k5.0k shares |
| 2026-09-28 | Plott Ronald Todd Director | Bought | $5.2k5.0k shares |
| 2026-09-24 | BRADFORD PATRICIA A Director | Bought | $6.6k6.5k shares |
| 2026-09-22 | Bitterman Robert J Chairman, Pres. & CEO, director | Bought | $2.1k2.0k shares |
| 2026-09-15 | BRADFORD PATRICIA A Director | Bought | $12.4k12.0k shares |
| 2026-08-19 | Plott Ronald Todd Director | Bought | $17.1k15.0k shares |
| 2026-08-18 | Bitterman Robert J Chairman, Pres. & CEO, director | Bought | $10.6k10.0k shares |
| 2026-06-26 | Bitterman Robert J Chairman, Pres. & CEO, director | Bought | $9.9k10.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q2 2026
| Manager | Shares | Change |
|---|---|---|
| JANE STREET GROUP, LLC 0.00% of their portfolio | 117.8k $120.7k | Reduced -1.4k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 114.6k $117.4k | Reduced -32.7k |
| VANGUARD CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 94.3k $96.6k | Added +14.4k |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. 0.00% of their portfolio | 50.0k $51.0k | New |
| Cetera Investment Advisers 0.00% of their portfolio | 47.5k $48.7k | Added +2.5k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 47.1k $48.3k | New |
| VANGUARD FIDUCIARY TRUST CO 0.00% of their portfolio | 38.2k $39.1k | Unchanged |
| NORTHERN TRUST CORP 0.00% of their portfolio | 27.8k $28.5k | Added +4.0k |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 21.5k $22.0k | Reduced -11.0k |
| XTX Topco Ltd 0.00% of their portfolio | 18.5k $18.9k | Reduced -6.4k |
| HRT FINANCIAL LP 0.00% of their portfolio | 13.2k $13.0k | Reduced -21.6k |
| BRIDGEWAY CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 12.0k $12.3k | New |
| CITIGROUP INC 0.00% of their portfolio | 11.6k $11.9k | Added +10.6k |
| CAPTRUST FINANCIAL ADVISORS 0.00% of their portfolio | 10.0k $10.2k | Unchanged |
| Tower Research Capital LLC (TRC) 0.00% of their portfolio | 6.2k $6.4k | Reduced -1.4k |
| MORGAN STANLEY 0.00% of their portfolio | 6.0k $6.2k | Unchanged |
| UBS Group AG 0.00% of their portfolio | 5.4k $5.5k | Reduced -21.6k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 2.0k $2.1k | Unchanged |
| Spire Wealth Management 0.00% of their portfolio | 2.0k $2.0k | Reduced -10 |
| SBI Securities Co., Ltd. 0.00% of their portfolio | 1.2k $1.3k | Added +23 |
| BARCLAYS PLC 0.00% of their portfolio | 231 $237 | New |
| ASSETMARK, INC 0.00% of their portfolio | 110 $113 | Unchanged |
| Activest Wealth Management 0.00% of their portfolio | 9 $9 | Unchanged |
| Caitong International Asset Management Co., Ltd 0.00% of their portfolio | 6 $6 | Added +3 |