PDS Biotechnology Corp
For the period ended Jun 30, 2025. Filed Aug 13, 2025.
View on SEC.govAbout this filing
A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.
Jun 30, 2025 · Filed Aug 13, 2025
What changed in Management’s Discussion and Analysis?
Read the current filingPrevious report: 10-Q
Period ended 2025-03-31; filed 2025-05-14.
0001140361-25-018967
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of OperationsCurrent report: 10-Q
Period ended 2025-06-30; filed 2025-08-13.
0001140361-25-030825
Item 2. Management’s Discussion and Analysis of Financial Condition and Results of OperationsThe baseline is this issuer’s latest earlier reporting period of the same form that was filed before the current report. A previous 10-Q is a different quarter, not a year-over-year comparison. Amendments are excluded.
Compared 118 previous paragraphs and 130 current paragraphs.
67 unchanged; 35 reworded; 27 added; 11 removed; 5 previous and 1 current paragraphs rearranged.
Tables are not compared: 75 previous and 82 current tables excluded. Dates, whitespace, punctuation and numbering changes are ignored; changes to financial figures remain significant.
A changed paragraph is not evidence that risk increased or decreased. An unchanged paragraph does not establish that risk stayed the same.
Added paragraphs (27)
Current report
Index
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In July 2025, we announced that the colorectal cancer cohort of a phase 2 clinical trial with PDS01ADC met the pre-defined criteria for expansion to stage 2 following positive stage 1 results.
Current report
VERSATILE-003: PDS0101 (Versamune® HPV) + pembrolizumab
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VERSATILE-002: PDS0101 + Keytruda®
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Index
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Index
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In June 2025, we announced publication of an abstract at the American Society of Clinical Oncology (ASCO) Annual Meeting with updated data from VERSATILE-002. Main elements of the update were as follows:
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Index
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PDS0103 (Versamune® MUC1)
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Index
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Comparison of the Six months June 30, 2025 and 2024
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Index
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Research and development expenses decreased to $10.0 millionfor the six months ended June 30, 2025 from $11.2 million for the six months ended June 30, 2024. The decrease of $1.2 million was primarily attributable to a decrease of $0.5 million manufacturing and quality costs, a decrease of $1.1 million in personnel costs offset by an increase of $0.4 million in clinical trial costs.
Current report
General and Administrative Expenses
Current report
General and administrative expenses decreased to $6.7 million for the six months ended June 30, 2025 from $7.6 million for the six months ended June 30, 2024. The decrease of $0.9 million was primarily attributable to a decrease of $0.5 million in personnel costs and $0.4 million in professional fees.
Current report
Benefit from Income Taxes
Current report
Income tax benefit was $1.2 million for the six months ended June 30, 2025 and $0.9 million for the six months ended June 30, 2025. The increase of $0.3 million was due to an increase in the amount of New Jersey NOL carryforwards sold when compared to the comparable period. The New Jersey Economic Development Authority (NJEDA), Technology Business Tax Certificate Transfer (NOL) program has a lifetime cap of $20 million per business. We have reached the cap and we will no longer be eligible to participate in the program.
Current report
During the three and six months ended June 30, 2025, we sold 960,511 and 1,165,861 shares, respectively, of our common stock with a net value of $1.5 million and $1.8 million, respectively, pursuant to the New Sales Agreement. During the three and six months ended June 30, 2024, we sold 0 and 3,428,681 shares, respectively, of its common stock with a net value of $0 and $19.5 million, respectively, pursuant to the Sales Agreement.
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Index
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Net Cash Used in Investing Activities
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Net cash used in investing activities for the six months ended June 30, 2025 and 2024 was $0, respectively.
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Removed paragraphs (11)
Previous report
In February 2023, we announced a successful completion of a Type B meeting with the FDA for the triple combination of Versamune® HPV and PDS01ADC with an FDA-approved immune checkpoint inhibitor for the treatment of recurrent/metastatic, ICI resistant head and neck cancer that is positive for the HPV type 16. In recent interactions with the FDA, we confirmed the required contents of a clinical protocol for the potential registrational trial.
Previous report
In October 2023, updated interim data based on an August 2, 2023 cut off from our VERSATILE-002 Phase 2 clinical trial evaluating the combination of Versamune® HPV in combination with Merck’s anti-PD-1 therapy, Keytruda® (pembrolizumab) which is the FDA-approved standard of care for first-line treatment of recurrent/metastatic head and neck cancer was presented at a key opinion leader roundtable that we sponsored.
Previous report
In October 2023, immune response data from a preliminary analysis of a subset of patients in our VERSATILE-002 Phase 2 clinical trial was presented at the European Society for Medical Oncology Congress 2023.
Previous report
In November 2023, we announced updated survival data from our NCI-led Phase 2 trial investigating the triple combination of Versamune® HPV, PDS01ADC and an investigational immune checkpoint inhibitor (ICI) in two groups of advanced cancer patients with various types of human papillomavirus (HPV) 16-positive cancers. The data showed 75% Survival of ICI naïve patients at 36 months.
Previous report
In November 2023, preclinical data from our NCI-led trial including Versamune® HPV, PDS01ADC and an HDAC inhibitor in ICI-resistant HPV-16 positive cancer was presented during a poster presentation at the Society for Immunotherapy of Cancer 38 th Annual Meeting.
Previous report
VERSATILE-003: Versamune® HPV + pembrolizumab
Previous report
VERSATILE-002: Versamune® HPV (PDS0101) + Keytruda®
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Versamune® MUC1 (formerly PDS0103)
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Research and Development Expenses
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Research and Development Expenses
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In connection with the Loan and Security Agreement, we issued Horizon Technology Finance Corporation and Powerscourt Investments XXV, LP warrants to purchase an aggregate total of 381,625 shares of our common stock at an initial exercise price of $3.6685 per share. Each warrant is classified as equity and is exercisable at any time for a period beginning on the date of grant and ending on the earlier of (A) 10 years from the date of grant, and (B) the closing of (A) (i) the sale, lease, exchange, conveyance or other disposition of all or substantially all of the our property or business, or (ii) its merger into or consolidation with any other corporation (other than a wholly-owned subsidiary of the Company), or any transaction (including a merger or other reorganization) or series of related transactions, in which more than 50% of the voting power of the Company is disposed of, in each case, for cash or for marketable securities meeting certain requirements as described in the applicable warrants. The key assumptions used in Black-Scholes option pricing model were (i) expected term of 10 years, (ii) a risk-free rate of 3.11%, (iii) expected volatility of 93.8%, and (iv) no estimated dividend yield.
Reworded paragraphs (35)
Previous wording
In March 2025, we announced the initiation of our VERSATILE-003 Phase 3 clinical trial evaluating Versamune® HPV in first-line treatment of recurrent/metastatic head and neck squamous cell carcinoma in HPV16-positive patients.
Current wording
In March 2025, we announced the initiation of our VERSATILE-003 Phase 3 clinical trial evaluating PDS0101 (Versamune® HPV) in HPV16-positive first-line treatment of recurrent/metastatic head and neck squamous cell carcinoma.
Previous wording
In November 2020, our VERSATILE-002 Phase 2 clinical trial evaluating the combination of Versamune® HPV in combination with Merck’s anti-PD-1 therapy, Keytruda® (pembrolizumab) which is the FDA-approved standard of care for first-line treatment of recurrent/metastatic head and neck cancer commenced. Enrollment in stage 2 of 2 for the ICI naïve arm and the ICI resistant arms are complete. The clinical trial will evaluate the efficacy and safety of this therapeutic combination as a first and second line treatment in patients with recurrent or metastatic head and neck cancer and high-risk human papillomavirus-16 (HPV16) infection.
Current wording
In November 2020, our VERSATILE-002 Phase 2 clinical trial evaluating the combination of PDS0101 in combination with Merck’s anti-PD-1 therapy, Keytruda® (pembrolizumab) which is the FDA-approved standard of care for first-line treatment of recurrent/metastatic head and neck cancer commenced. Enrollment in stage 2 of 2 for the ICI naïve arm and the ICI resistant arms are complete. The clinical trial will evaluate the efficacy and safety of this therapeutic combination as a first and second line treatment in patients with recurrent or metastatic head and neck cancer and high-risk human papillomavirus-16 (HPV16) infection.
Previous wording
In this trial sponsored by PDS Biotech, patients whose cancer has returned following initial treatment or spread will be treated with the combination of Versamune® HPV and Keytruda® to evaluate if the addition of Versamune® HPV might improve the efficacy reported in published studies of Keytruda® alone. Patients in the trial will receive a total of 5 cycles of combination therapy in the context of standard of care Keytruda® therapy administered every three weeks until disease progression. The primary endpoint of VERSATILE-002 is the objective response rate, or ORR, at six months following initiation of treatment. There are twocohorts in the trial. Cohort 1 is for patients who have yet to be treated with an immune checkpoint inhibitor (ICI naïve) and cohort 2 which consists of patients who have failed immune checkpoint inhibitor therapy (ICI resistant).
Current wording
In this trial sponsored by PDS Biotech, patients whose cancer has returned following initial treatment or spread will be treated with the combination of PDS0101 and Keytruda® to evaluate if the addition of PDS 0101 might improve the efficacy reported in published studies of Keytruda® alone. Patients in the trial will receive a total of 5 cycles of combination therapy in the context of standard of care Keytruda® therapy administered every three weeks until disease progression. The primary endpoint of VERSATILE-002 is the objective response rate, or ORR, at six months following initiation of treatment. There are twocohorts in the trial. Cohort 1 is for patients who have yet to be treated with an immune checkpoint inhibitor (ICI naïve) and cohort 2 which consists of patients who have failed immune checkpoint inhibitor therapy (ICI resistant).
Previous wording
In May 2024, at a virtual key opinion leader event, updated interim data was presented based on a November 30, 2023 cut-off from our VERSATILE-002 Phase 2 clinical trial evaluating the combination of Versamune® HPV in combination with Merck’s anti-PD-1 therapy, Keytruda® (pembrolizumab) which is an FDA-approved standard of care for first-line treatment of recurrent/metastatic head and neck cancer. Data from 53 patients was presented. The data from the event based on investigator assessment was as follows:
Current wording
In May 2024, at a virtual key opinion leader event, updated interim data was presented based on a November 30, 2023 cut-off from our VERSATILE-002 Phase 2 clinical trial evaluating the combination of PDS0101 in combination with Merck’s anti-PD-1 therapy, Keytruda® (pembrolizumab) which is an FDA-approved standard of care for first-line treatment of recurrent/metastatic head and neck cancer. Data from 53 patients was presented. The data from the event based on investigator assessment was as follows:
Previous wording
During the May 2024 event, we also announced an updated clinical strategy with a two-part registrational trial focused on the double combination of Versamune® HPV + pembrolizumab, accompanied by an investigation of the triple combination of Versamune® HPV + PDS01ADC + pembrolizumab as a first line treatment in HPV16-positive recurrent/metastatic HNSCC.
Current wording
During the May 2024 event, we also announced an updated clinical strategy with a two-part registrational trial focused on the double combination of Versamune® HPV + pembrolizumab, accompanied by an investigation of the triple combination of PDS0101 + PDS01ADC + pembrolizumab as a first line treatment in HPV16-positive recurrent/metastatic HNSCC.
Previous wording
In August 2024, we provided an update to our clinical strategy following discussions with the FDA. During the August 2024 update, we announced our intent to initiate a registrational study in first line treatment in HPV16-positive recurrent/metastatic HNSCC with the double combination of Versamune® HPV + pembrolizumab.
Current wording
In August 2024, we provided an update to our clinical strategy following discussions with the FDA. During the August 2024 update, we announced our intent to initiate a registrational study in first line treatment in HPV16-positive recurrent/metastatic HNSCC with the double combination of PDS0101 + pembrolizumab.
Previous wording
National Cancer Institute: Versamune® HPV+ PDS01ADC +Bintrafusp Alfa
Current wording
National Cancer Institute: PDS0101 + PDS01ADC +Bintrafusp Alfa
Previous wording
In June 2020, the first patient was dosed under a Cooperative Research and Development Agreement (CRADA), in the NCI led Phase 2 investigator-initiated trial evaluating Versamune® HPV with PDS01ADC, and M7824 (Bintrafusp alfa), which is owned by EMD Serono (Merck KGaA) in patients with advanced HPV-positive cancers who have failed prior treatment. In February 2021, the NCI’s Phase 2 clinical trial of Versamune® HPV for the treatment of advanced HPV-positive cancers had achieved its preliminary objective response target in patients naïve to check point inhibitors which allowed for full enrollment of approximately 20 patients in this group. In addition, based on promising results in the ICI naïve arm, the trial was amended to allow enrollment of a separate cohort of IC -resistant patients for assessment of safety and activity of the triple combination. The trial has been closed for enrollment. Preliminary efficacy assessment of the triple combination in this added group of 29 ICI resistant patients has been completed and evaluation of long-term patient survival is ongoing.
Current wording
In June 2020, the first patient was dosed under a Cooperative Research and Development Agreement (CRADA), in the NCI led Phase 2 investigator-initiated trial evaluating PDS0101 with PDS01ADC, and M7824 (Bintrafusp alfa), which is owned by EMD Serono (Merck KGaA) in patients with advanced HPV-positive cancers who have failed prior treatment. In February 2021, the NCI’s Phase 2 clinical trial of PDS0101 for the treatment of advanced HPV-positive cancers had achieved its preliminary objective response target in patients naïve to check point inhibitors which allowed for full enrollment of approximately 20 patients in this group. In addition, based on promising results in the ICI naïve arm, the trial was amended to allow enrollment of a separate cohort of IC -resistant patients for assessment of safety and activity of the triple combination. The trial has been closed for enrollment. Preliminary efficacy assessment of the triple combination in this added group of 29 ICI resistant patients has been completed and evaluation of long-term patient survival is ongoing.
Previous wording
Preclinical study results arising from this CRADA were published in the Journal for ImmunoTherapy of Cancer, Immunomodulation to enhance the efficacy of an HPV therapeutic vaccine (Journal for ImmunoTherapy of Cancer2020;8:e000612. Doi:10.1136/ jitc-2020-000612), and indicate that Versamune® HPV generated both HPV-specific T cells and an associated antitumor response when used as a monotherapy. When Versamune® HPV was combined with the two other novel clinical-stage anti-cancer agents, Bintrafusp Alfa and M9241 (which is now owned by us and referred to as PDS01ADC), the preclinical data suggested that all three therapeutic agents worked synergistically to provide superior tumor T cell responses and subsequent tumor regression when compared to any of the agents alone or the 2-component combinations. The published preclinical data demonstrating powerful activity of the triple combination appears to be corroborated in the Phase 2 trial, and this triple combination could form the basis of a unique platform providing improved cancer treatments across multiple cancers.
Current wording
Preclinical study results arising from this CRADA were published in the Journal for ImmunoTherapy of Cancer, Immunomodulation to enhance the efficacy of an HPV therapeutic vaccine (Journal for ImmunoTherapy of Cancer2020;8:e000612. Doi:10.1136/ jitc-2020-000612), and indicate that PDS0101 generated both HPV-specific T cells and an associated antitumor response when used as a monotherapy. When PDS0101 was combined with the two other novel clinical-stage anti-cancer agents, Bintrafusp Alfa and M9241 (which is now owned by us and referred to as PDS01ADC), the preclinical data suggested that all three therapeutic agents worked synergistically to provide superior tumor T cell responses and subsequent tumor regression when compared to any of the agents alone or the 2-component combinations. The published preclinical data demonstrating powerful activity of the triple combination appears to be corroborated in the Phase 2 trial, and this triple combination could form the basis of a unique platform providing improved cancer treatments across multiple cancers.
Previous wording
In February 2023, we announced the completion of a Type B meeting with the FDA for the combination therapy of Versamune® HPV, PDS01ADC, and an FDA-approved immune checkpoint inhibitor for the treatment of recurrent/metastatic HPV-positive ICI-resistant head and neck cancer. We confirmed the required contents of the trial design for a potential registrational trial of the combination.
Current wording
In February 2023, we announced the completion of a Type B meeting with the FDA for the combination therapy of PDS0101, PDS01ADC, and an FDA-approved immune checkpoint inhibitor for the treatment of recurrent/metastatic HPV-positive ICI-resistant head and neck cancer. We confirmed the required contents of the trial design for a potential registrational trial of the combination.
Previous wording
MD Anderson Cancer Center (IMMUNOCERV): Versamune® HPV+ Chemoradiotherapy
Current wording
MD Anderson Cancer Center (IMMUNOCERV): PDS0101 + Chemoradiotherapy
Previous wording
In October 2020, a Phase 2 Investigator Initiated Trial (IIT) was initiated with The University of Texas MD Anderson Cancer Center and is actively recruiting patients. This clinical trial is investigating the safety and anti-tumor efficacy of Versamune® HPV in combination with standard-of-care chemo-radiotherapy, or CRT, and their correlation with critical immunological biomarkers in patients with locally advanced cervical cancer. We believe that Versamune® has strong T cell induction with the potential to enhance efficacy of the current standard of care CRT treatment in this indication with the FDA at this meeting.
Current wording
In October 2020, a Phase 2 Investigator Initiated Trial (IIT) was initiated with The University of Texas MD Anderson Cancer Center and is actively recruiting patients. This clinical trial is investigating the safety and anti-tumor efficacy of PDS0101 in combination with standard-of-care chemo-radiotherapy, or CRT, and their correlation with critical immunological biomarkers in patients with locally advanced cervical cancer. We believe that Versamune® has strong T cell induction with the potential to enhance efficacy of the current standard of care CRT treatment in this indication with the FDA at this meeting.
Previous wording
In October 2023, data demonstrating Versamune® HPV in combination with standard-of-care (SOC) chemoradiotherapy was associated with a rapid decline in human papillomavirus circulating cell-free DNA (ctHPV-DNA), a potential predictive biomarker of treatment response. The data from the IMMUNOCERV Phase 2 clinical trial was featured in an oral presentation at the American Society for Radiation Oncology Annual Meeting which included the following:
Current wording
In October 2023, data demonstrating PDS0101 in combination with standard-of-care (SOC) chemoradiotherapy was associated with a rapid decline in human papillomavirus circulating cell-free DNA (ctHPV-DNA), a potential predictive biomarker of treatment response. The data from the IMMUNOCERV Phase 2 clinical trial was featured in an oral presentation at the American Society for Radiation Oncology Annual Meeting which included the following:
Previous wording
Mayo Clinic: Versamune® HPV Monotherapy and in combination with Keytruda®
Current wording
Mayo Clinic: PDS0101 (Versamune® HPV) Monotherapy and in combination with Keytruda®
Previous wording
In February 2022, we initiated an IIT, MC200710, for Versamune® HPV alone or in combination with the immune checkpoint inhibitor, Keytruda®, in patients with HPV-positive oropharyngeal cancer (HPV(+) OPSCC) at high risk of recurrence. The trial is conducted by the Mayo Clinic, a nationally and internationally recognized center of excellence for the treatment of head and neck cancers. We believe that this trial allows us to better understand the activity of Versamune® HPV alone or in combination with Keytruda® in earlier stages of disease.
Current wording
In February 2022, we initiated an IIT, MC200710, for PDS0101 alone or in combination with the immune checkpoint inhibitor, Keytruda®, in patients with HPV-positive oropharyngeal cancer (HPV(+) OPSCC) at high risk of recurrence. The trial is conducted by the Mayo Clinic, a nationally and internationally recognized center of excellence for the treatment of head and neck cancers. We believe that this trial allows us to better understand the activity of PDS0101 alone or in combination with Keytruda® in earlier stages of disease.
Previous wording
In this trial, treatment will be administered before patients proceed to transoral robotic surgery (TORS) with curative intent. Treatment in this setting is referred to as neoadjuvant treatment. Versamune® HPV has been shown to induce killer T cells that target and kill HPV-positive cancers, either alone or in combination with ICIs in preclinical studies, and in combination in clinical studies of patients with advanced recurrent/metastatic HPV-positive cancers. The trial will explore whether Versamune® HPV with or without checkpoint inhibition may increase HPV-specific anti-tumor responses, potentially resulting in tumor shrinkage, pathologic regression, and decreases in circulating tumor DNA (ctDNA).
Current wording
In this trial, treatment will be administered before patients proceed to transoral robotic surgery (TORS) with curative intent. Treatment in this setting is referred to as neoadjuvant treatment. PDS0101 has been shown to induce killer T cells that target and kill HPV-positive cancers, either alone or in combination with ICIs in preclinical studies, and in combination in clinical studies of patients with advanced recurrent/metastatic HPV-positive cancers. The trial will explore whether Versamune®HPV with or without checkpoint inhibition may increase HPV-specific anti-tumor responses, potentially resulting in tumor shrinkage, pathologic regression, and decreases in circulating tumor DNA (ctDNA).
Previous wording
In April 2020, the above mentioned CRADA between PDS Biotech and the NCI was expanded beyond Versamune® HPV (formerly PDS0101) to include clinical and preclinical development of Versamune® MUC1. Versamune® MUC1 is an investigational immune therapy owned by PDS Biotech and designed to treat cancers associated with the mucin-1, or MUC1, oncogenic protein. These include cancers such as ovarian, breast, colorectal and lung cancers. Versamune® MUC1 combines Versamune® with novel highly immunogenic agonist epitopes of MUC1 developed by the NCI and licensed by us.
Current wording
In April 2020, the above mentioned CRADA between PDS Biotech and the NCI was expanded beyond PDS0101 (Versamune® HPV) to include clinical and preclinical development of PDS0103. PDS0103 is an investigational immune therapy owned by PDS Biotech and designed to treat cancers associated with the mucin-1, or MUC1, oncogenic protein. These include cancers such as ovarian, breast, colorectal and lung cancers. PDS0103 combines Versamune® with novel highly immunogenic agonist epitopes of MUC1 developed by the NCI and licensed by us.
Previous wording
MUC1 is highly expressed in several types of cancer and has been shown to be associated with drug resistance and poor disease prognosis in breast, colorectal, lung and ovarian cancers, for which Versamune® MUC1 is being developed. Expression of MUC1 is often associated with poor disease prognosis, due in part to drug resistance. In preclinical studies, and similarly to Versamune® HPV, Versamune® MUC1 demonstrated the ability to generate powerful MUC1-specific CD8 killer T cells.
Current wording
MUC1 is highly expressed in several types of cancer and has been shown to be associated with drug resistance and poor disease prognosis in breast, colorectal, lung and ovarian cancers, for which PDS0103 is being developed. Expression of MUC1 is often associated with poor disease prognosis, due in part to drug resistance. In preclinical studies, and similarly to PDS0101, PDS0103 demonstrated the ability to generate powerful MUC1-specific CD8 killer T cells.
Previous wording
In March 2025, we announced FDA clearance of our IND application for the combination of Versamune® MUC1 and PDS01ADC in treatment of metastatic colorectal cancer.
Current wording
In March 2025, we announced FDA clearance of our IND application for the combination of PDS0103 and PDS01ADC in treatment of metastatic colorectal cancer.
Previous wording
With theexclusive global license agreement with Merck KGaA, Darmstadt, Germany for PDS01ADC, we believe we have simplified our registrational pathway for the NCI-led triple combination by owning both Versamune® HPV and PDS01ADC and combining these agents with an FDA approved ICI. PDS01ADC has been designed to overcome the limitations of cytokine therapy as explained above, and based on extensive preclinical studies performed at the NCI evaluating PDS01ADC as a monotherapy and also in combinations with established standard of care treatments for cancer, we believe that PDS01ADC has significant potential as a cytokine therapy independent of Versamune®. Based on the informative preclinical studies, a number of IIT Phase 2 trials are currently in progress at the NCI, some of which are outlined below:
Current wording
With theexclusive global license agreement with Merck KGaA, Darmstadt, Germany for PDS01ADC, we believe we have simplified our registrational pathway for the NCI-led triple combination by owning both PDS0101 and PDS01ADC and combining these agents with an FDA approved ICI. PDS01ADC has been designed to overcome the limitations of cytokine therapy as explained above, and based on extensive preclinical studies performed at the NCI evaluating PDS01ADC as a monotherapy and also in combinations with established standard of care treatments for cancer, we believe that PDS01ADC has significant potential as a cytokine therapy independent of Versamune®. Based on the informative preclinical studies, a number of IIT Phase 2 trials are currently in progress at the NCI, some of which are outlined below:
Previous wording
We have never been profitable and have incurred net losses in each year since inception. Our net losses were $8.5 million, and $10.6 million for the three months ended March 31, 2025 and 2024, respectively. As of March 31, 2025, we had an accumulated deficit of $190.6 million. Substantially all of our net losses have resulted from costs incurred in connection with our research and development programs and from general and administrative costs associated with these operations.
Current wording
We have never been profitable and have incurred net losses in each year since inception. Our net losses were $17.9 million, and $18.9 million for the six months ended June 30, 2025 and 2024, respectively. As of June 30, 2025, we had an accumulated deficit of $200.0 million. Substantially all of our net losses have resulted from costs incurred in connection with our research and development programs and from general and administrative costs associated with these operations.
Previous wording
As of March 31, 2025, we had $40.0 million in cash and cash equivalents.
Current wording
As of June 30, 2025, we had $31.9 million in cash and cash equivalents.
Previous wording
Research and development (R&D) expenses decreased to $5.8 millionfor the three months ended March 31, 2025 from $6.7 millionfor the three months ended March 31, 2024. The decrease of $0.9 million was primarily attributable to a decrease of $0.6 million in clinical trial costs, a decrease of $0.2 million in personnel costs, and a decrease of $0.1 million inmanufacturing costs.
Current wording
Research and development (R&D) expenses decreased to $4.2 millionfor the three months ended June 30, 2025 from $4.5 millionfor the three months ended June 30, 2024. The decrease of $0.3 million was primarily attributable to a decrease of $0.4 million in manufacturing costs, a decrease of $0.9 million in personnel costs, offset by an increase of $1.0 million in clinical trial costs
Previous wording
General and administrative expenses decreased to $3.3 million for the three months ended March 31, 2025 from $3.4 million for the three months ended March 31, 2024. Thedecrease of $0.1 million was primarily attributable to a decrease of $0.2 million in personnel costs offset by an increaseof $0.1 million inprofessional fees.
Current wording
General and administrative expenses decreased to $3.4 million for the three months ended June 30, 2025 from $4.2 million for the three months ended June 30, 2024. Thedecrease of $0.8 million was primarily attributable to a decrease of $0.4 million in personnel costs and $0.4 million in professional fees.
Previous wording
Income tax benefit was $1.2 million for the three months ended March 31, 2025 and $0 million for the three months ended March 31, 2024. The increase of $1.2 million was due to the timing of proceeds received from the net sale of tax benefits to an unrelated, profitable New Jersey corporation pursuant to the Company’s participation in the New Jersey Technology Business Tax Certificate Transfer Net Operating Loss (NOL) Program. The comparable tax benefit of $0.9 million was received in April 2024 and reflected as an income tax benefit for the three months ended June 30, 2024.
Current wording
Income tax benefit was $0 for the three months ended June 30, 2025 and $0.9 million for the three months ended June 30, 2024. The decrease of $0.9 million was due to the timing of proceeds received from the net sale of tax benefits to an unrelated, profitable New Jersey corporation pursuant to the Company’s participation in the New Jersey Technology Business Tax Certificate Transfer Net Operating Loss (NOL) Program. The tax benefit of $1.2 million was received in March 2025 and reflected as an income tax benefit for the three months ended March 31, 2025.
Previous wording
In August 2022, we entered into an At Market Issuance Sales Agreement, or the Sales Agreement, with B. Riley Securities, Inc. and BTIG, LLC, each an Agent and collectively the Agents, with respect to an at-the-market offering program under which we may offer and sell, from time to time at our sole discretion, shares of our common stock, having an aggregate offering price of up to $50 million, or the Placement Shares, through or to the Agents, as sales agents or principals. Upon delivery of a placement notice and subject to the terms and conditions of the Sales Agreement, the Agents may sell the Placement Shares by any method permitted by law deemed to be an “at the market” offering as defined in Rule 415 of the Securities Act of 1933, as amended, including, without limitation, sales made through The Nasdaq Capital Market or on any other existing trading market for our common stock. The Agents will use commercially reasonable efforts to sell the Placement Shares from time to time, based upon our instructions (including any price, time or size limits or other customary parameters or conditions we may impose). We will pay the Agents a commission equal to three percent (3%) of the gross sales proceeds of any Placement Shares sold through the Agents under the Sales Agreement, and we have also provided the Agents with customary indemnification and contribution rights. We are not obligated to make any sales of our common stock under the Sales Agreement. The offering of Placement Shares pursuant to the Sales Agreement will terminate upon the earlier of (i) the sale of all Placement Shares subject to the Sales Agreement or (ii) the termination of the Sales Agreement in accordance with its terms. In August 2024, we entered into an Amended and Restated At Market Issuance Sales Agreement, or the New Sales Agreement, with B. Riley Securities, Inc. and H.C. Wainwright & Co., LLC, with terms that are substantially consistent with those included in the original Sales Agreement. The New Sales Agreement superseded and replaced the Sales Agreement. For the year ended December 31, 2024, the Company sold 3,428,681 shares of common stock for a net value of $19.5 million pursuant to the Sales Agreement and 1,108,105 shares of common stock for a net value of $3.2 million pursuant to the New Sales Agreement. During the three months ended March 31, 2025, the Company sold 205,350 shares of common stock for a net value of $0.3 million pursuant to the New Sales Agreement and during the three months ended March 31, 2024, we sold 3,428,681 shares of common stock for a net value of $19.5 million, pursuant to the Sales Agreement.
Current wording
In August 2022, we entered into an At Market Issuance Sales Agreement, or the Sales Agreement, with B. Riley Securities, Inc. and BTIG, LLC, each an Agent and collectively the Agents, with respect to an at-the-market offering program under which we may offer and sell, from time to time at our sole discretion, shares of our common stock, having an aggregate offering price of up to $50 million, or the Placement Shares, through or to the Agents, as sales agents or principals. Upon delivery of a placement notice and subject to the terms and conditions of the Sales Agreement, the Agents may sell the Placement Shares by any method permitted by law deemed to be an “at the market” offering as defined in Rule 415 of the Securities Act of 1933, as amended, including, without limitation, sales made through The Nasdaq Capital Market or on any other existing trading market for our common stock. The Agents will use commercially reasonable efforts to sell the Placement Shares from time to time, based upon our instructions (including any price, time or size limits or other customary parameters or conditions we may impose). We will pay the Agents a commission equal to three percent (3%) of the gross sales proceeds of any Placement Shares sold through the Agents under the Sales Agreement, and we have also provided the Agents with customary indemnification and contribution rights. We are not obligated to make any sales of our common stock under the Sales Agreement. The offering of Placement Shares pursuant to the Sales Agreement will terminate upon the earlier of (i) the sale of all Placement Shares subject to the Sales Agreement or (ii) the termination of the Sales Agreement in accordance with its terms. In August 2024, we entered into an Amended and Restated At Market Issuance Sales Agreement, or the New Sales Agreement, with B. Riley Securities, Inc. and H.C. Wainwright & Co., LLC, with terms that are substantially consistent with those included in the original Sales Agreement. The New Sales Agreement superseded and replaced the Sales Agreement. For the year ended December 31, 2024, we sold 3,428,681 shares of common stock for a net value of $19.5 million pursuant to the Sales Agreement and 1,108,105 shares of common stock for a net value of $3.2 million pursuant to the New Sales Agreement.
Previous wording
In August 2022, the Company entered into a venture loan and security agreement, or the Loan and Security Agreement, with Horizon Technology Finance Corporation, as lender and collateral agent for itself and the other lenders. In total, the Company received $24.6 million in net proceeds under the Loan and Security Agreement. The Company’s indebtedness under the Loan and Security Agreement was satisfied in full and retired in full with a portion of the proceeds received from the Securities Purchase Agreement, as discussed below.
Current wording
In August 2022, we entered into a venture loan and security agreement, or the Loan and Security Agreement, with Horizon Technology Finance Corporation, as lender and collateral agent for itself and the other lenders. In total, the Company received $24.6 million in net proceeds under the Loan and Security Agreement. The Company’s indebtedness under the Loan and Security Agreement was satisfied in full and retired in full with a portion of the proceeds received from the Securities Purchase Agreement, as discussed below.
Previous wording
In February 2025, we entered into a Securities Purchase Agreement with certain purchasers, pursuant to which the we agreed to sell an aggregate of 6,396,787 shares of common stock, pre-funded warrants to purchase up to an aggregate of 933,334 shares of common stock, and common stock warrants to purchase up to an aggregate of 7,330,121 shares of common stock at a combined purchase price of $1.50 per share and warrant (the “February 2025 Offering”). Two of our directors participated in the February 2025 Offering and purchased 30,121 shares of common stock in the aggregate at an offering price per share of $1.66 and common stock warrants to purchase 30,121 shares of common stock. The common stock warrants issued to our directors have an exercise price per share of $1.53, but are otherwise identical to the common stock warrants issued to all other participants in the February 2025 Offering. Aggregate gross proceeds from the February 2025 Offering were approximately $11 million. Net proceeds to us from the offering, after deducting the placement agent fees and other estimated offering expenses payable by us, were approximately $10.05 million. The February 2025 Offering closed on February 28, 2025.
Current wording
In February 2025, we entered into a securities purchase agreement with certain purchasers, pursuant to which we agreed to sell an aggregate of 6,396,787 shares of common stock, pre-funded warrants to purchase up to an aggregate of 933,334 shares of common stock, and common stock warrants to purchase up to an aggregate of 7,330,121 shares of common stock at a combined purchase price of $1.50 per share and warrant (the “February 2025 Offering”). Two of our directors participated in the February 2025 Offering and purchased 30,121 shares of common stock in the aggregate at an offering price per share of $1.66 and common stock warrants to purchase 30,121 shares of common stock. The common stock warrants issued to our directors have an exercise price per share of $1.53, but are otherwise identical to the common stock warrants issued to all other participants in the February 2025 Offering. Aggregate gross proceeds from the February 2025 Offering were approximately $11 million. Net proceeds to us from the offering, after deducting the placement agent fees and other estimated offering expenses payable by us, were approximately $10.05 million. The February 2025 Offering closed on February 28, 2025.
Previous wording
On April 30, 2025, the Company entered into a Securities Purchase Agreement (the “Securities Purchase Agreement”) with certain third party lenders and JGB Collateral LLC, as collateral agent. Pursuant to the Securities Purchase Agreement, the Company agreed to sell (i) senior secured convertible debentures in an aggregate principal amount of $22,222,222 (collectively, the “Debentures”) and (ii) warrants to purchase up to 1,000,000 shares of common stock, for an exercise price of $2.52 per share (collectively, the “Warrants”), subject to adjustments as set forth in the Warrants, for a total purchase price of $20,000,000. Approximately $19 million of the proceeds from the transactions contemplated by the Securities Purchase Agreement were used to satisfy in full and retire the Company’s indebtedness under the Loan and Security Agreement.
Current wording
On April 30, 2025, we entered into a securities purchase agreement (the “Securities Purchase Agreement”) with certain third party lenders and JGB Collateral LLC, as collateral agent. Pursuant to the Securities Purchase Agreement, the we agreed to sell (i) senior secured convertible debentures in an aggregate principal amount of $22,222,222 (collectively, the “Debentures”) and (ii) warrants to purchase up to 1,000,000 shares of common stock, for an exercise price of $2.52 per share (collectively, the “Warrants”), subject to adjustments as set forth in the Warrants, for a total purchase price of $20,000,000. Approximately $19 million of the proceeds from the transactions contemplated by the Securities Purchase Agreement were used to satisfy in full and retire our indebtedness under the Loan and Security Agreement. The remaining proceeds from the transactions contemplated by the Securities Purchase Agreement will be used for general corporate purposes and transaction expenses. Pursuant to the Debentures, we must at all times maintain a cash balance equal to the lesser of (a) $15.0 million and (b) the then-outstanding principal balance of the Debentures plus $3.0 million, in a deposit account subject to an account control agreement. In addition, for as long as any portion of the Debentures remain outstanding, we are generally restricted from: incurring indebtedness; granting or suffering liens on any of our property or assets; amending our organizational documents; repurchasing any of our securities; paying dividends; selling, disposing, licensing or leasing our assets other than in the ordinary course; and other customary restrictive covenants. Beginning on August 28, 2025, the holders of the Debentures may require us to redeem a portion of the Debentures in an amount up to $500,000 per calendar month in the aggregate by providing written notice to us. In connection with the Securities Purchase Agreement, on April 30, 2025, we also entered into a Security Agreement (the “Security Agreement”), pursuant to which we and our subsidiary granted, for the benefit of the investors, to secure our obligations under the Securities Purchase Agreement and the Debentures, (i) first priority liens on certain assets, in each case subject to permitted liens described in the Security Agreement. In addition, on April 30, 2025, we and our subsidiary entered into a Subsidiary Guarantee, pursuant to which we and our subsidiary guaranteed all of our obligations under the JGB Purchase Agreement and the Debentures.
Previous wording
As of March 31, 2025, we had $40.0 million in cash and cash equivalents. Our primary uses of cash are to fund operating expenses, primarily research and development expenditures. Cash used to fund operating expenses is impacted by the timing of when we pay these expenses, as reflected in the change in our outstanding accounts payable and accrued expenses.
Current wording
As of June 30, 2025, we had $31.9 million in cash and cash equivalents. Our primary uses of cash are to fund operating expenses, primarily research and development expenditures. Cash used to fund operating expenses is impacted by the timing of when we pay these expenses, as reflected in the change in our outstanding accounts payable and accrued expenses.
Previous wording
Net cash used in operating activities was $9.0 million and $9.9 million for the three months ended March 31, 2025 and 2024, respectively. The decrease in net cash used in operating activities of $0.9 million was primarilydue to a decrease in the non-cash stock-based compensation expense of $0.4 million offset by a decrease in net loss of $2.1 million and changes in the timing of working capital requirements, including changes in prepaid expenses and other assets, accrued expenses and accounts payable.
Current wording
Net cash used in operating activities was $18.1 million and $18.8 million for the six months ended June 30, 2025 and 2024, respectively. The decrease in net cash used in operating activities of $0.7 million was primarily due to a decrease in non-cash stock-based compensation expense of $1.7 million offset by a decrease in net loss of $1.0 million and changes in the timing of working capital requirements, including changes in prepaid expenses and other assets, accrued expenses and accounts payable.
Previous wording
Net cash provided by financing activities for the three months ended March 31, 2025 and 2024 decreased by $12.7 million primarily due to a $19.2 million decrease in proceeds from the issuance of common stock from the Sales Agreement, an increase in proceeds from the issuance of common stock and pre-funded warrants of $10.2 million from the financing agreement, offset by a $3.1 million loan repayment.
Current wording
Net cash provided by financing activities for the six months ended June 30, 2025 and 2024 decreased by $11.7 million primarily due to a $22.8 million decrease in proceeds due to the repayment of the Loan and Security Agreement, a $17.7 million decrease in proceeds from the issuance of common stock from the Sales Agreement, a $0.5 million decrease in proceeds from the exercise of stock options, offset by a $19.2 million increase in proceeds from the Securities Purchase Agreement and a $10.2 million increase in proceeds from the issuance of common stock, warrants and pre-funded warrants from the February 2025 Offering.
Previous wording
We evaluated whether there are any conditions and events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year after the filing of this Quarterly Report. Our budgeted cash requirements in 2025 and beyond include expenses related to continuing development and clinical studies as well as payments on our debt. Until we can generate significant cash from our operations, we expect to continue to fund our operations with available financial resources. These financial resources may not be adequate to sustain our operations. While we intend to finance our cash needs principally through equity or debt financings, collaborations, strategic alliances, or license agreements with third parties, there is no assurance that new financing will be available to us on commercially acceptable terms or in the amounts required, if at all. In addition, the Loan and Security Agreement allows for the lenders to call the outstanding balance of the term loans if we fail to maintain the minimum cash balances outlined in the Loans and Security Agreement. We have concluded that substantial doubt exists about our ability to continue as a going concern for a period of at least 12 months from the date of the issuance of these unaudited Condensed Consolidated financial statements.
Current wording
We evaluated whether there are any conditions and events, considered in the aggregate, that raise substantial doubt about our ability to continue as a going concern within one year after the filing of this Quarterly Report. Our budgeted cash requirements in 2025 and beyond include expenses related to continuing development and clinical studies as well as payments on our debt. Until we can generate significant cash from our operations, we expect to continue to fund our operations with available financial resources. These financial resources may not be adequate to sustain our operations. While we intend to finance our cash needs principally through equity or debt financings, collaborations, strategic alliances, or license agreements with third parties, there is no assurance that new financing will be available to us on commercially acceptable terms or in the amounts required, if at all. In addition, the securities Purchase Agreement allows for the lenders to call the outstanding balance of the term loans if we fail to maintain the minimum cash balances outlined in the Securities Purchase Agreement. We have concluded that substantial doubt exists about our ability to continue as a going concern for a period of at least 12 months from the date of the issuance of these unaudited Condensed Consolidated Financial Statements.
Previous wording
There have been no material changes to our critical accounting policies and estimates during the three months ended March 31, 2025 from those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2024.
Current wording
There have been no material changes to our critical accounting policies and estimates during the six months ended June 30, 2025 from those disclosed in our Annual Report on Form 10-K for the year ended December 31, 2024.
Previous wording
As of January 1, 2021, we were no longer an “emerging growth company,” as defined in the Jumpstart Our Business Startups Act of 2012, or the JOBS Act. However, we remain a “smaller reporting company,” as defined in Rule 12b-2 under the Securities Exchange Act of 1934, as amended. We will cease to be a smaller reporting company if we have a non-affiliate public float in excess of $250 million and annual revenues in excess of $100 million, or a non-affiliate public float in excess of $700 million, determined on an annual basis. As a smaller reporting company, we are permitted and intend to rely on exemptions from certain disclosure requirements that are applicable to other public companies that are not smaller reporting companies. We will continue to take advantage of some or all of the available exemptions.
Current wording
We are a “smaller reporting company,” as defined in Rule 12b-2 under the Securities Exchange Act of 1934, as amended. We will cease to be a smaller reporting company if we have a non-affiliate public float in excess of $250 million and annual revenues in excess of $100 million, or a non-affiliate public float in excess of $700 million, determined on an annual basis. As a smaller reporting company, we are permitted and intend to rely on exemptions from certain disclosure requirements that are applicable to other public companies that are not smaller reporting companies. We will continue to take advantage of some or all of the available exemptions.
Rearranged current paragraphs (1)
Current report — wording carried from elsewhere
The following table summarizes the results of our operations for the six months ended June 30, 2025 and 2024:
Rearranged previous paragraphs (5)
Previous report — wording carried elsewhere
In June 2023, an abstract was presented at the 2023 American Society of Clinical Oncology: Abstract number 6012, Safety and Efficacy of Immune Checkpoint Inhibitor (ICI) Naïve Cohort from Study of Versamune® HPVand Pembrolizumab in HPV16-Positive Head and Neck Squamous Cell Carcinoma (HNSCC). The abstract was also selected as one of the featured posters reviewed by an expert panel in the Head and Neck Cancer discussion session.
Previous report — wording carried elsewhere
In September 2023, data on our investigational universal flu vaccine, PDS0202, was presented at the 9 th European Scientific Working Group on Influenza (ESWI) conference. This data demonstrated broad neutralization across multiple influenza strains in animals and provided protection against infection after challenging animals not previously exposed to flu with lethal doses of the pandemic H1N1 flu virus.
Previous report — wording carried elsewhere
In October 2023, data demonstrating Versamune® HPV in combination with standard-of-care (SOC) chemoradiotherapy was associated with a rapid decline in human papillomavirus circulating cell-free DNA (ctHPV-DNA), a potential predictive biomarker of treatment response. The data from the IMMUNOCERV Phase 2 clinical trial were featured in an oral presentation at the American Society for Radiation Oncology Annual Meeting.
Previous report — wording carried elsewhere
In October 2023, interim safety and immune response data was presented for the first-in-human Phase1/2 clinical trial evaluating PDS01ADC in combination with current SOC chemotherapy, docetaxel, to treat metastatic castration sensitive and castration resistant prostate cancer. The data was featured in an oral presentation at the 11 th Annual Meeting of the International Cytokine & Interferon Society.
Previous report — wording carried elsewhere
In September 2024, we announced updated data from our VERSATILE-002 Phase 2 clinical trial presented during a poster session at the European Society for Medical Oncology (ESMO) Congress 2024.