INOVIO Reports Second Quarter 2025 Financial Results and Recent Business Highlights

On track to submit Biologics License Application (BLA) for INO-3107 in 2H25, with the goal of file acceptance by year end Completed design verification (DV) testing of CELLECTRA® 5PSP device required for BLA submission and requested rolling submission from US Food and Drug Administration (FDA) Continuing to advance commercial preparations for potential launch of INO-3107 in 2026 if approved by FDA , /PRNewswire/ -- INOVIO (NASDAQ: INO), a biotechnology company focused on developing and commercializing DNA medicines to help treat and protect people from HPV-related diseases, cancer, and infectious diseases, today announced its financial results for the second quarter of 2025 and provided an update on recent company developments. "With device DV testing complete, we remain on track to submit our BLA for INO-3107 in the second half of this year, with the goal of having FDA acceptance of the file by year end. Utilizing our breakthrough therapy designation, we've requested rolling submission and expect to be able to immediately provide the clinical and non-clinical modules for review, while we complete work on the device-related sections and update our Investigational New Drug (IND) Application for our confirmatory trial," said Dr. Jacqueline Shea, INOVIO's President and Chief Executive Officer. "We believe that INO-3107 could become the preferred treatment option for Recurrent Respiratory Papillomatosis (RRP) patients and their physicians—a treatment option with the potential to change the trajectory of this disease. I look forward to building on the significant progress of this past quarter and providing updates as we work toward a potential approval date in mid-2026." Operational Highlights INO-3107 – Recurrent Respiratory Papillomatosis (RRP)INOVIO completed the DV testing for the CELLECTRA 5PSP device and requested in July 2025 that the FDA allow it to begin submitting its BLA on a rolling basis based on the Breakthrough Therapy designation previously granted to INO-3107. INOVIO anticipates completing its submission over the next several months and requesting a priority review. FDA inspection of INOVIO as clinical sponsor of the Phase 1/2 trial was successfully completed. The company is working on the device-related sections for its BLA and updating its active IND so it can begin enrolling patients into its placebo-controlled, randomized confirmatory trial, which will include 100 patients and be conducted at approximately 20 sites across the United States. Data from a retrospective study (RRP-002) investigating the long-term clinical efficacy of patients treated with INO-3107 have been published in a peer-reviewed journal, The Laryngoscope. The data demonstrate that INO-3107 provided significant clinical benefit to RRP patients, as measured by reduction in surgery, that continued to improve in years two and three following initial treatment. Highlights from the paper include: Patients experiencing a 50-100% reduction in surgeries (Overall Response Rate) increased from 72% at the end of the initial 12-month Phase 1/2 trial (Year 1) to 86% at the end of the second 12-month period (Year 2) Patients experiencing a Complete Response (CR - 0 surgeries per year) increased from 28% for Year 1 to 50% for Year 2 Mean number of surgeries was reduced from 4.1 in the pre-treatment period (the 52 weeks prior to beginning treatment with INO-3107) to 1.7 for Year 1 to 0.9 for Year 2 Partial data into the third 12-month period (Year 3 - median follow up 2.8 years following initial treatment) continued the trend of improvement and a reduced number of surgeries INO-3107 was well tolerated, with no serious adverse events or long-term safety concerns identified Next Generation DNA Medicine CandidatesINOVIO presented data on its next generation DNA medicine technology at the Orphan Drug Summit in July. Data included key insights from an ongoing Phase 1 proof-of-concept trial evaluating DNA-encoded monoclonal antibodies (DMAbs) for COVID-19 (preprint of manuscript available on Research Square) as well as an overview of DNA-encoded protein technology (DPROT) that targets long-term protein expression and aims to address some of the shortcomings of conventional therapeutic protein replacement treatments. Upcoming PresentationsINOVIO will present data on INO-3107 and other promising DNA medicine candidates at the following upcoming events: American Academy of Otolaryngology – October 10-13 World Vaccine Congress Europe - October 13-16 European Society for Medical Oncology - October 17-21 37th International Papillomavirus Society Conference - October 23-26 World Orphan Drug Congress - October 27-29 ISV Congress - October 28-30 General CorporateINOVIO remains focused on financial discipline and directing resources to support the INO-3107 program. The company strengthened its balance sheet with an underwritten public offering of common stock and warrants in July 2025. Net proceeds from the offering, after deducting underwriting discounts, commissions and offering expenses, were approximately $22.5 million. Second Quarter 2025 Financial Results Research and Development (R&D) Expenses: R&D expenses for the three months ended June 30, 2025, decreased to $14.5 million from $23.1 million for the same period in 2024. The decrease was primarily the result of lower drug manufacturing, clinical study and other expenses related to INO-3107, and lower contract labor, among other variances. General and Administrative (G&A) Expenses: G&A expenses decreased to $8.6 million for the three months ended June 30, 2025, from $10.2 million for the same period in 2024. The decrease was primarily related to a decrease in employee and consultant stock-based compensation, lower outside services and lower contract labor, among other variances. Total Operating Expenses: Total operating expenses decreased to $23.1 million for the three months ended June 30, 2025, from $33.3 million for the same period in 2024. Net Loss: Net loss for the three months ended June 30, 2025, decreased to $23.5 million, or $0.61 per basic and diluted share, from a net loss of $32.2 million, or $1.19 per basic and diluted share, for the three months ended June 30, 2024. Shares Outstanding: As of June 30, 2025, INOVIO had 36.7 million common shares outstanding and 51.7 million common shares outstanding on a fully diluted basis, after giving effect to the exercise, vesting, and conversion, as applicable, of its outstanding common stock warrants, including pre-funded warrants and stock options, restricted stock units and convertible preferred stock. Cash, Cash Equivalents and Short-term Investments: As of June 30, 2025, cash, cash equivalents and short-term investments were $47.5 million (excluding net proceeds from the July 2025 offering of $22.5 million), compared to $94.1 million as of December 31, 2024. INOVIO's balance sheet and statement of operations are provided below. Additional information is included in INOVIO's quarterly report on Form 10-Q for the quarter ended June 30, 2025, which can be accessed at: http://ir.inovio.com/financials/default.aspx. Cash Guidance INOVIO estimates its current cash, cash equivalents and short-term investments balances, including the net proceeds from the July 2025 offering, will support the company's operations into the second quarter of 2026. This projection includes an operational net cash burn estimate of approximately $22 million for the third quarter of 2025. These projections do not include any further capital-raising activities that INOVIO may undertake. Conference Call / Webcast InformationINOVIO's management will host a live conference call and webcast with slides at 4:30 p.m. ET today to discuss INOVIO's financial results and provide a general business update. The live webcast and replay may be accessed by visiting INOVIO's website at http://ir.inovio.com/events-and-presentations/default.aspx. About INOVIO's DNA Medicines PlatformINOVIO's DNA medicines platform has two innovative components: precisely designed DNA plasmids, delivered by INOVIO's proprietary investigational medical device, CELLECTRA. INOVIO uses proprietary technology to design its DNA plasmids, which are small circular DNA molecules that work like software the body's cells can download to produce specific proteins to target and fight disease. INOVIO's proprietary CELLECTRA delivery devices are designed to optimally deliver its DNA medicines to the body's cells without requiring chemical adjuvants or lipid nanoparticles and without the risk of the anti-vector response historically seen with viral vector platforms. About INOVIOINOVIO is a biotechnology company focused on developing and commercializing DNA medicines to help treat and protect people from HPV-related diseases, cancer, and infectious diseases. INOVIO's technology optimizes the design and delivery of innovative DNA medicines that teach the body to manufacture its own disease-fighting tools. For more information, visit www.inovio.com. Forward-Looking StatementsThis press release contains certain forward-looking statements relating to our business, including the planned initiation and conduct of pre-clinical studies and clinical trials and the availability and timing of data from those studies and trials, the completion of the FDA-required device verification testing, the BLA submission and request for priority review and goal of FDA's acceptance of the submission by the end of 2025, the potential commercial launch of INO-3107 if regulatory approval is obtained, the potential benefits of our product candidates, expectations regarding sufficiency of our cash resources into the second quarter of 2026 and expected cash burn for the third quarter of 2025. Actual events or results may differ from the expectations set forth herein as a result of a number of factors, including uncertainties inherent in pre-clinical studies, clinical trials, product development programs and commercialization activities and outcomes, the availability of funding to support continuing research and studies in an effort to prove safety and efficacy of electroporation technology as a delivery mechanism or develop viable DNA medicines, our ability to support our pipeline of DNA medicine products, the ability of our collaborators to attain development and commercial milestones for products we license and product sales that will enable us to receive future payments and royalties, the adequacy of our capital resources, the availability or potential availability of alternative therapies or treatments for the conditions targeted by us or collaborators, including alternatives that may be more efficacious or cost effective than any therapy or treatment that we and our collaborators hope to develop, issues involving product liability, issues involving patents and whether they or licenses to them will provide us with meaningful protection from others using the covered technologies, whether such proprietary rights are enforceable or defensible or infringe or allegedly infringe on rights of others or can withstand claims of invalidity and whether we can finance or devote other significant resources that may be necessary to prosecute, protect or defend them, the level of corporate expenditures, assessments of our technology by potential corporate or other partners or collaborators, capital market conditions, the impact of government healthcare proposals and other factors set forth in our Annual Report on Form 10-K for the year ended December 31, 2024, our Quarterly Report on Form 10-Q for the quarter ended June 30, 2025, and other filings we make from time to time with the Securities and Exchange Commission. There can be no assurance that any product candidate in our pipeline will be successfully developed, manufactured, or commercialized, that the results of clinical trials will be supportive of regulatory approvals required to market products, or that any of the forward-looking information provided herein will be proven accurate. Forward-looking statements speak only as of the date of this release, and we undertake no obligation to update or revise these statements, except as may be required by law. ContactsMedia: Jennie Willson, (267) 429-8567, [email protected]Investors: Peter Vozzo - ICR Healthcare, (443) 213-0505, [email protected] Inovio Pharmaceuticals, Inc. CONSOLIDATED BALANCE SHEETS June 30, 2025 December 31, 2024 (Unaudited) ASSETS Current assets: Cash and cash equivalents $24,351,377 $65,813,297 Short-term investments 23,198,083 28,300,232 Accounts receivable from affiliated entity 840,312 1,199,056 Prepaid expenses and other current assets 4,307,377 2,517,465 Total current assets 52,697,149 97,830,050 Fixed assets, net 3,089,293 3,659,818 Investments in affiliated entity 3,085,348 1,613,844 Operating lease right-of-use assets 7,356,238 8,113,840 Other assets 2,012,476 1,979,654 Total assets $68,240,504 $113,197,206 LIABILITIES AND STOCKHOLDERS' EQUITY Current liabilities: Accounts payable and accrued expenses $15,750,691 $16,200,013 Accounts payable and accrued expenses due to affiliated entity 369,370 1,351,163 Accrued clinical trial expenses 1,510,984 2,021,860 Common stock warrant liability 11,420,326 13,255,188 Operating lease liability 2,656,239 2,497,360 Total current liabilities 31,707,610 35,325,584 Operating lease liability, net of current portion 8,001,989 9,367,827 Total liabilities 39,709,599 44,693,411 Stockholders' equity: Preferred stock — — Common stock 36,719 36,099 Additional paid-in capital 1,802,589,299 1,799,362,625 Accumulated deficit (1,773,433,371) (1,730,219,262) Accumulated other comprehensive loss (661,742) (675,667) Total Inovio Pharmaceuticals, Inc. stockholders' equity 28,530,905 68,503,795 Total liabilities and stockholders' equity $68,240,504 $113,197,206 Inovio Pharmaceuticals, Inc. CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) Three Months Ended June 30, Six Months Ended June 30, 2025 2024 2025 2024 Revenues: Revenue from collaborative arrangement $— $100,762 $65,343 $100,762 Operating expenses: Research and development 14,521,407 23,090,989 30,612,309 44,001,307 General and administrative 8,563,112 10,206,686 17,588,082 20,781,337 Total operating expenses 23,084,519 33,297,675 48,200,391 64,782,644 Loss from operations (23,084,519) (33,196,913) (48,135,048) (64,681,882) Other income (expense): Interest income 610,638 1,307,358 1,418,715 2,807,648 Interest expense — — — (177,833) Change in fair value of common stock warrant liability (1,878,010) — 1,834,862 — Gain (loss) on investment in affiliated entity 776,373 (334,294) 1,471,504 (460,312) Net unrealized gain (loss) on available-for-sale equity securities 759,289 (20,820) 899,523 480,057 Other (expense) income, net (703,183) 7,571 (703,665) (674,647) Net loss $(23,519,412) $(32,237,098) $(43,214,109) $(62,706,969) Net loss per share Basic and diluted $(0.61) $(1.19) $(1.12) $(2.48) Weighted average number of common shares used to compute net loss per share Basic and diluted 38,830,053 27,197,802 38,722,451 25,244,657 SOURCE INOVIO Pharmaceuticals, Inc. 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INOVIO Reports Second Quarter 2025 Financial Results and Recent Business Highlights

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