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Phio Pharmaceuticals Announces Participation in the Renmark Financial Communications Live Virtual Non-Deal Roadshow Series

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Phio Pharmaceuticals (NASDAQ: PHIO) will present in a live Virtual Non-Deal Roadshow on April 29, 2026 at 12 PM EDT. CEO Robert Bitterman will overview the INTASYL siRNA platform, discuss PH-762 clinical progress, and host a live Q&A.

Phio reported 22 patients completed Phase 1b across five dose cohorts with no dose-limiting toxicities or serious adverse events; pathological response in cSCC was ~65% overall and 85% (6 of 7) in the highest-dose cohort.

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AI-generated analysis. Not financial advice.

Positive

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Negative

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News Market Reaction – PHIO

-1.60%
1 alert
-1.60% News Effect
-$236K Valuation Impact
$14.52M Market Cap
0.3x Rel. Volume

On the day this news was published, PHIO declined 1.60%, reflecting a mild negative market reaction. This price movement removed approximately $236K from the company's valuation, bringing the market cap to $14.52M at that time.

Data tracked by StockTitan Argus on the day of publication.

Key Figures

Phase 1b patients: 22 patients Dose-escalation cohorts: 5 cohorts Pathological response rate: 65% +5 more
8 metrics
Phase 1b patients 22 patients PH-762 intratumoral Phase 1b trial
Dose-escalation cohorts 5 cohorts PH-762 Phase 1b dose escalation
Pathological response rate 65% cSCC patients across all dosing cohorts in Phase 1b
High-dose response rate 85% (6 of 7 patients) Highest-dose PH-762 cohort in cSCC
ATM program size $6,360,000 Common stock under at-the-market offering agreement
ATM commission 3.0% Sales agent commission on gross proceeds
Public float $19,080,217 Based on 11,563,768 non-affiliate shares at Feb 13, 2026
Shares outstanding 11,617,250 shares Common shares outstanding as of Dec 31, 2025

Market Reality Check

Price: $1.0700 Vol: Volume 80,822 is below 20...
low vol
$1.0700 Last Close
Volume Volume 80,822 is below 20-day average 195,282 (relative volume 0.41x) ahead of the event-focused news. low
Technical Shares at $1.25 are trading below the 200-day MA of $1.63, well under the 52-week high of $4.19.

Peers on Argus

PHIO was flat while peers showed mixed moves: gains in APLM (+2.35%) contrasted ...
1 Up

PHIO was flat while peers showed mixed moves: gains in APLM (+2.35%) contrasted with declines in ADAP (-17.57%) and others, pointing to stock-specific drivers rather than a coordinated sector move.

Historical Context

5 past events · Latest: Apr 13 (Positive)
Pattern 5 events
Date Event Sentiment Move Catalyst
Apr 13 Investor fireside chat Positive +2.5% Virtual fireside chat highlighting INTASYL platform and PH-762 Phase 1b data.
Apr 09 Conference presentation Neutral -3.9% Centri Capital Conference presentation on clinical progress and PH-762 program.
Mar 30 Manufacturing agreement Positive -4.8% U.S. cGMP drug product manufacturing deal to supply PH-762 for trials and potential launch.
Mar 23 Clinical data presentation Positive +2.5% AAD 2026 presentation of Phase 1b PH-762 results in cutaneous carcinomas.
Mar 16 Investor fireside chat Positive +7.3% Virtual chat on INTASYL immuno-oncology approach and PH‑762 Phase 1b data.
Pattern Detected

Recent news has focused on PH-762 clinical data and investor outreach, with mostly positive reactions to clinically oriented updates and mixed responses to event-focused communications.

Recent Company History

Over the past months, Phio has repeatedly highlighted Phase 1b data for PH-762, with 22 patients treated, no dose-limiting toxicities and ~65% pathological response in cSCC, including 85% at the highest dose. Announcements on fireside chats, conference presentations, and a cGMP manufacturing agreement framed PH-762 as the core value driver. Price reactions have varied, with some clinical and investor-relations events (e.g., Mar 16, Mar 23, Apr 13) drawing positive moves, while other updates saw modest pullbacks.

Regulatory & Risk Context

Active S-3 Shelf · $24.5 million
Shelf Active
Active S-3 Shelf Registration 2025-11-20
$24.5 million registered capacity

An effective S-3 shelf filed on Nov 20, 2025 covers resale of up to 11,763,800 warrant shares by existing holders. Phio would receive up to $24.5 million only if these warrants are exercised for cash, while recent ATM arrangements for up to $6,360,000 of common stock provide an additional, separate source of potential equity issuance.

Market Pulse Summary

This announcement continues Phio’s investor-outreach campaign, featuring a virtual non-deal roadshow...
Analysis

This announcement continues Phio’s investor-outreach campaign, featuring a virtual non-deal roadshow to review its INTASYL siRNA platform and PH-762 data. Phase 1b results have shown 22 patients treated with no dose-limiting toxicities and ~65% pathological response in cSCC, including 85% at the highest dose. Recent filings highlight both clinical progress and active capital-raising tools, so monitoring future trial design updates, use of the $6.36M ATM, and warrant exercises remains important.

Key Terms

sirna, intratumoral, cutaneous squamous cell carcinoma, cSCC, +3 more
7 terms
sirna medical
"Phio Pharmaceuticals Corp. (NASDAQ: PHIO) is a clinical-stage siRNA biopharmaceutical company"
Small interfering RNA (siRNA) is a short strand of genetic material that binds to and destroys the messenger RNA that carries instructions for making a specific protein, effectively switching that gene off. Investors care because siRNA is a platform for precise medicines: successful trials or approvals can create high-value drugs, while delivery challenges, manufacturing complexity, patent positions and regulatory risk can sharply affect a biotech company's prospects.
intratumoral medical
"PH-762, is being evaluated as an intratumoral therapy in cutaneous squamous cell carcinoma"
"Intratumoral" describes something that occurs or exists within a tumor, which is an abnormal growth of tissue. For investors, understanding intratumoral is important because it relates to medical treatments or research aimed at targeting the tumor directly, potentially leading to more effective therapies. Think of it as focusing treatment straight into the problem area, much like fixing a leak by working directly on the pipe itself.
cutaneous squamous cell carcinoma medical
"therapy in cutaneous squamous cell carcinoma (cSCC), melanoma and Merkel cell carcinoma"
A common form of skin cancer that starts in the thin, outer layer of the skin and can grow or, in some cases, spread to nearby tissue or organs. For investors, it matters because diagnosis rates, available treatments, and regulatory approvals shape demand for therapies, influence clinical trial results, and affect potential revenue for companies developing drugs, devices, or diagnostics — like spotting a stubborn weed that may require different tools to remove.
cSCC medical
"pathological response rate in cSCC across all dosing cohorts of approximately 65%"
Cutaneous squamous cell carcinoma (CSCC) is a common type of skin cancer that starts in the outer layer of the skin, often after long-term sun exposure. It can behave like a weed growing from a small patch—usually treatable when caught early but capable of invading nearby tissue or spreading if unchecked. For investors, CSCC matters because its prevalence and severity drive demand for diagnostics, treatments and follow-on care, influencing clinical trial opportunities, regulatory decisions and market potential in the oncology sector.
merkel cell carcinoma medical
"melanoma and Merkel cell carcinoma. In its Phase 1b trial, Phio has reported"
Merkel cell carcinoma is a rare, fast-growing form of skin cancer that starts in cells near the base of the skin and often spreads quickly to nearby tissues and organs. For investors, it matters because treatments for this aggressive disease can create high-value opportunities or risks: successful drugs or tests can unlock significant revenue and partnerships, while failed trials or regulatory setbacks can sharply affect a biotech company’s prospects — like a single critical test determining whether a new product succeeds or stalls.
pathological response medical
"The Company has also reported a pathological response rate in cSCC across all dosing cohorts"
A pathological response is the change seen in tissue samples—often tumor tissue—after a medical treatment, as assessed under a microscope or by lab tests. Investors care because it provides direct evidence of whether a therapy is killing or shrinking diseased cells, acting like a close-up inspection of repairs after work is done; strong pathological responses can support regulatory approval, higher sales expectations, and a therapy’s perceived value.
immuno-oncology medical
"why we believe INTASYL represents a differentiated approach to immuno-oncology and our strategy"
Immuno-oncology is a field of medicine focused on using the body's immune system to fight cancer. It involves developing treatments that help the immune system recognize and attack cancer cells more effectively. For investors, advancements in immuno-oncology can signal promising new therapies that may lead to improved patient outcomes and potentially significant commercial opportunities.

AI-generated analysis. Not financial advice.

Live Presentation and Q&A: Wednesday, April 29, 2026 12 PM EDT

King of Prussia, Pennsylvania--(Newsfile Corp. - April 23, 2026) - Phio Pharmaceuticals Corp. (NASDAQ: PHIO) is a clinical-stage siRNA biopharmaceutical company developing therapeutics using its proprietary INTASYL® gene silencing technology to eliminate cancer. Phio announced today that Mr. Robert Bitterman, CEO and Chairman of the Board, Phio Pharmaceuticals will provide an overview of the Company's INTASYL siRNA platform and discuss recent clinical progress and priorities, followed by a live Q&A.

Phio's lead clinical candidate, PH-762, is being evaluated as an intratumoral therapy in cutaneous squamous cell carcinoma (cSCC), melanoma and Merkel cell carcinoma. In its Phase 1b trial, Phio has reported that 22 patients completed treatment across five dose-escalation cohorts, with no dose-limiting toxicities or serious adverse events. The Company has also reported a pathological response rate in cSCC across all dosing cohorts of approximately 65%, including an 85% pathological response (6 of 7 patients) in the highest-dose cohort.

"We look forward to sharing why we believe INTASYL represents a differentiated approach to immuno-oncology and our strategy for PH-762 as we plan for the next stage of development," said Robert Bitterman, CEO and Chairman of Phio Pharmaceuticals.

Phio's presentation and live Q&A will take place on Wednesday April 29, 2026, at 12 PM EDT in the live Virtual Non-Deal Roadshow Series hosted by Renmark Financial Communications Inc.

REGISTER HERE: Renmark Virtual Non-Deal Roadshow NASDAQ - PHIO | Event Registration | Renmark Financial Communications

Please Note: If the link does not work, please copy and paste into your browser. To ensure smooth connectivity, please access the link above using the latest version of Google Chrome.

A replay of the event may be accessed on the Renmark Financial Communications Inc. website at https://www.renmarkfinancial.com/vndrs.

About Phio Pharmaceuticals Corp.
Phio Pharmaceuticals Corp. (NASDAQ: PHIO) is a clinical-stage siRNA biopharmaceutical company advancing its INTASYL® gene silencing technology focused on immuno-oncology therapeutics. Phio's INTASYL compounds are designed to enhance the body's immune cells to more effectively kill cancer cells. Phio's lead clinical program is an INTASYL compound, PH-762, that silences the PD-1 gene implicated in various forms of skin cancer. The Phase 1b trial (NCT# 06014086) is evaluating PH-762 for the treatment of cutaneous squamous cell carcinoma, melanoma and Merkel cell carcinoma. PH-762 is a potential non-surgical treatment for skin cancers.

For additional information, visit the Company's website, www.phiopharma.com.

Forward-Looking Statements
This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements can be identified by words such as "intends," "believes," "anticipates," "indicates," "plans," "expects," "suggests," "may," "would," "should," "potential," "designed to," "will," "ongoing," "estimate," "forecast," "target," "predict," "could" and similar references, although not all forward-looking statements contain these words. These statements, which include statements regarding the anticipated benefits of our INTASYL™ RNAi platform, the results from our ongoing clinical trials, our expectations that our cash runway will extend into the first half of 2027, our expectations regarding timing of FDA submissions intended to propose and seek guidance for next steps in clinical study design for PH-762, details regarding our planned non-clinical toxicology study, and our ability to support ongoing clinical development, operational requirements and strategic initiatives with the capital we currently have on hand, are based only on our current beliefs, expectations and assumptions and are subject to inherent uncertainties, risks and changes in circumstances that are difficult to predict and many of which are outside of our control. Our actual results may differ materially from those indicated in the forward-looking statements as a result of a number of important factors, including, but not limited to, the impact to our business and operations by inflationary pressures, rising interest rates, recession fears, the development of our product candidates, results from our preclinical and clinical activities, our ability to execute on business strategies, our ability to develop our product candidates with collaboration partners, and the success of any such collaborations, the timeline and duration for advancing our product candidates into clinical development, the timing or likelihood of regulatory filings and approvals, the success of our efforts to commercialize our product candidates if approved, our ability to manufacture and supply our product candidates for clinical activities, and for commercial use if approved, the scope of protection we are able to establish and maintain for intellectual property rights covering our technology platform, our ability to obtain future financing, market and other conditions and those risks identified in our Annual Report on Form 10-K and subsequent Quarterly Reports on Form 10-Q under the caption "Risk Factors" and in other filings the Company periodically makes with the SEC. Readers are urged to review these risk factors and to not act in reliance on any forward-looking statements, as actual results may differ from those contemplated by our forward-looking statements. Phio does not undertake to update forward-looking statements to reflect a change in its views, events or circumstances that occur after the date of this release, except as required by law.

Contact:
Phio Pharmaceuticals Corp.
Jennifer Phillips: jphillips@phiopharma.com
Corporate Affairs

Renmark Financial Communications Inc.
James R. Kautz: jkautz@renmarkfinancial.com
Tel: (416)-644-2020 or (212)-812-7680
www.renmarkfinancial.com

To view the source version of this press release, please visit https://www.newsfilecorp.com/release/293854

FAQ

When is Phio (PHIO) presenting its Renmark virtual non-deal roadshow?

Phio will present live virtually on Wednesday, April 29, 2026 at 12 PM EDT via Renmark's Virtual Non-Deal Roadshow. According to the company, CEO Robert Bitterman will provide an INTASYL overview and answer investor questions; a replay will be available on Renmark's site.

What clinical update will Phio (PHIO) provide about PH-762 at the April 29, 2026 presentation?

Phio will discuss Phase 1b clinical progress for PH-762, including safety and pathological responses. According to the company, 22 patients completed treatment with no dose-limiting toxicities or serious adverse events and response data in cSCC will be reviewed.

What safety results has Phio (PHIO) reported for PH-762 in the Phase 1b trial?

Phio reported no dose-limiting toxicities and no serious adverse events in the Phase 1b trial. According to the company, these safety observations cover 22 patients across five dose-escalation cohorts.

What efficacy signals has Phio (PHIO) reported for PH-762 in cutaneous squamous cell carcinoma?

Phio reported an approximately 65% pathological response rate in cSCC across all dosing cohorts. According to the company, the highest-dose cohort showed an 85% pathological response (6 of 7 patients).

How can investors access Phio's (PHIO) presentation and replay after April 29, 2026?

Investors can join the live webcast on April 29, 2026 at 12 PM EDT via Renmark's registration link and access a replay later. According to the company, the replay will be posted on Renmark Financial Communications' website.