6-K
ProQR Therapeutics N.V. (PRQR)
UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM 6-K
Report of Foreign Private Issuer
Pursuant to Rule 13a-16 or 15d-16 of
the Securities Exchange Act of 1934
For the month of April 2026
Commission File Number: 001-36622
PROQR THERAPEUTICS N.V.
Zernikedreef 9
2333 CK Leiden
The Netherlands
Tel: +31 88 166 7000
(Address, Including Zip Code, and Telephone Number,
Including Area Code, of Registrant’s Principal Executive Offices)
Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F x Form 40-F ¨
Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1): ¨
Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7): ¨
On April 8, 2026, ProQR Therapeutics N.V. (“ProQR”) hosted a virtual analyst and investor event entitled “Expanding the Axiomer™ RNA Editing Opportunity Beyond AX-0810” to discuss developments of its current pipeline programs and announce two new programs, AX-0811 and AX-0422, including the selection of biliary atresia as the initial indication for Phase 2 development of AX-0810, along with a strategic overview. ProQR also released a press release entitled “ProQR Highlights Pipeline Expansion and Multiple Clinical Catalysts at Investor and Analyst Event.” Copies of the presentation and the press release are attached hereto as Exhibit 99.1 and Exhibit 99.2, respectively, and are incorporated herein by reference.
ProQR hereby incorporates by reference the information contained herein into ProQR’s registration statements on Form F-3 (File No. 333-282419, File No. 333-270943, File No. 333-263166 and File No. 333-285767).
SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.
| PROQR THERAPEUTICS N.V. | ||
|---|---|---|
| Date: April 8, 2026 | By: | /s/ Dennis Hom |
| Dennis Hom | ||
| Chief Financial Officer |
INDEX TO EXHIBITS
| Number | Description |
|---|---|
| 99.1 | Presentation of ProQR Therapeutics N.V. for April 8,<br> 2026 Analyst and Investor Event. |
| 99.2 | Press Release of ProQR Therapeutics N.V. on April 8, 2026. |
Exhibit 99.1
| EXPANDING<br>THE AXIOMER<br>RNA EDITING<br>OPPORTUNITY<br>BEYOND AX-0810<br>Nasdaq: PRQR | April 8, 2026 |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026<br>Agenda<br>Welcome & Agenda<br>Sarah Kiely<br>Opening Remarks<br>Daniel A. de Boer<br>Platform and<br>Pipeline Programs<br>Cristina Lopez Lopez<br>Gerard Platenburg<br>Agenda<br>Corporate Outlook<br>Dennis Hom<br>Q&A<br>Daniel A. de Boer<br>Cristina Lopez Lopez<br>Gerard Platenburg<br>Dennis Hom<br>Sarah Kiely<br>VP Investor Relations<br> & Corporate Affairs<br>Daniel A. de Boer<br>Founder & CEO<br>Cristina Lopez Lopez, MD, PhD<br>Chief Medical Officer<br>Dennis Hom<br>Chief Financial Officer<br>Gerard Platenburg<br>Chief Scientific Officer<br>Speakers<br>2 | |
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| Forward-looking statements<br>This presentation contains forward-looking statements. All statements other than statements of<br>historical fact are forward-looking statements, which are often indicated by terms such as<br> “continue,” "anticipate," "believe," "could," "estimate," "expect," "goal," "intend," "look forward<br>to", "may," "plan," "potential," "predict," "project," "should," "will," "would" and similar<br>expressions. Such forward-looking statements include, but are not limited to, statements<br>regarding our business, technology, strategy, preclinical and clinical model data; our initial<br>pipeline targets and the upcoming strategic priorities and milestones related thereto, the<br>continued advancement of our lead development pipeline programs, including approved,<br>ongoing and planned clinical trials; expectations regarding the ongoing Phase 1 clinical trial of<br>AX-0810 in NTCP for cholestatic diseases, including the planned trial design, and our ability to<br>recruit for and complete a Phase 1 clinical trial for AX-0810, biliary atresia as our primary<br>indication for AX-0810, the timing of top-line data readout for Phase 1 and Phase 1b of the<br>clinical trial and the initiation of Phase 2 trial; expectations regarding the safety and therapeutic<br>benefits of AX-0810, including the planned dosing levels and their efficacy; the anticipated<br>timing of initial Phase 1 clinical data for our lead program, AX-0810, in H1 2026; our new<br>pipeline targets, including the planned Phase 1 clinical trial of AX-0811 in NTCP for cholestatic<br>diseases, our ability to recruit for and complete a Phase 1 clinical trial for AX-0811, an<br>anticipated CTA filing and the Phase 1b cohort 1 data readout for AX-0811 pending regulatory<br>clearance, expectations regarding the efficacy, clinical development timeline, and expected trial<br>designs and development of AX-0422 and AX-2911, including the potential CTA filings and data<br>readout pending regulatory clearance; clinical updates across multiple programs in 2026 and<br>2027; the therapeutic potential and development timeline regarding AX-0810, AX-0811, AX-0422,<br>AX-2911 and AX-2402; the continued development and advancement of our Axiomer platform;<br>the therapeutic potential of our Axiomer RNA editing oligonucleotides and product candidates;<br>the timing, progress and results of our preclinical studies and other development activities,<br>including the release of data related thereto; our patent estate, including our anticipated<br>strength and our continued investment in it; our AI strategy and expectations regarding AI’s<br>ability to accelerate Axiomer discovery; our partnership with Ginkgo; and the potential of our<br>technologies and product candidates. Forward-looking statements are based on management's<br>beliefs and assumptions and on information available to management only as of the date of this<br>presentation. Our actual results could differ materially from those expressed or implied by<br>these forward-looking statements for many reasons, including, without limitation, the risks,<br>uncertainties and other factors in our filings made with the Securities and Exchange<br>Commission, including certain sections of our most recent annual report filed on Form 20-F.<br>These risks and uncertainties include, among others, the cost, timing and results of preclinical<br>studies and clinical trials and other development activities by us and our collaborative partners<br>whose operations and activities may be slowed or halted shortage and pressure on supply and<br>logistics on the global market, economic sanctions and international tariffs; the likelihood of our<br>preclinical and clinical programs being initiated and executed on timelines provided and<br>reliance on our contract research organizations and predictability of timely enrollment of<br>subjects and patients to advance our clinical trials and maintain their own operations; our<br>reliance on contract manufacturers to supply materials for research and development and the<br>risk of supply interruption from a contract manufacturer; the potential for future data to alter<br>initial and preliminary results of early-stage clinical trials; the unpredictability of the duration<br>and results of the regulatory review of applications or clearances that are necessary to initiate<br>and continue to advance and progress our clinical programs; the ability to secure, maintain and<br>realize the intended benefits of collaborations with partners, including the collaboration with<br>Lilly; the possible impairment of, inability to obtain, and costs to obtain intellectual property<br>rights; possible safety or efficacy concerns that could emerge as new data are generated in<br>research and development; general business, operational, financial and accounting risks, and<br>risks related to litigation and disputes with third parties; and risks related to macroeconomic<br>conditions and market volatility resulting from global economic developments, geopolitical<br>events and conflicts, high inflation, rising interest rates, tariffs and potential for significant<br>changes in U.S. policies and regulatory environment. Given these risks, uncertainties and other<br>factors, you should not place undue reliance on these forward-looking statements, and we<br>assume no obligation to update these forward-looking statements, even if new information<br>becomes available in the future, except as required by law.<br>Photo credits cover slide: https://cindyjeurissen.com/<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 3 | |
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| Presenter: Daniel A. de Boer<br>Strategic Overview<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 4 | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 5<br>Multiple clinical catalysts within the runway<br>Core focus on cholestatic development, with value creating pipeline beyond<br>Q2 2026<br>AX-0810 cholestatic<br>disease Phase 1<br>target engagement data<br>in healthy volunteers<br>YEAR END 2026<br>AX-0810 cholestatic<br>disease Phase 1b<br>top-line data<br>in PSC patients<br>AX-0810 start<br>Phase 2 trial in<br>Biliary Atresia<br>AI-ENABLED<br>discovery engine and<br>Ginkgo partnership +<br>AI-board<br>MID-2026<br>AX-0811 cholestatic<br>disease CTA filing<br>H1 2027<br>AX-0422 Hurler<br>Phase 1 initial liver<br>data in patients<br>EARLY 2027<br>AX-0422 Hurler<br>CTA filing<br>AX-0422 Hurler<br>expand to CNS<br>treatment<br>Clinical data expected<br>in 3 development<br>programs within the<br>current runway<br>2026<br>H1 2027 2027<br>AX-2911<br>YEAR END 2026 MASH FIH<br>AX-0811 cholestatic<br>disease Phase 1<br>initial data | |
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| Presenters: Cristina Lopez Lopez & Gerard Platenburg<br>Pipeline Programs<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 6 | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 7<br>Addressing unmet need in cholestatic<br>diseases through NTCP modulation<br>NTCP, sodium taurocholate co-transporting polypeptide. References: 1Trivedi PJ, et al. Clin Gastroenterol Hepatol. 2022 Aug;20(8):1687-1700.e4; 2Schreiber RA, et al. J Clin Med. 2022 Feb 14;11(4):999<br>CHOLESTATIC<br>DISEASE<br> • Biliary Atresia affects<br>pediatrics early in life<br>(~20,000 patients<br>worldwide)<br> • Primary Sclerosing<br>Cholangitis affects adults<br>(~80,000 US+EU)<br> • No approved therapies<br>and may require liver<br>transplantation1,2<br>BILE ACID<br>TOXICITY<br> • Bile acid accumulation<br>drives liver injury,<br>leading to fibrosis and<br>liver failure<br>NTCP MODULATION<br>STRATEGY<br> • Human genetics<br>supports NTCP<br>modulation as<br>hepato-protective<br>mechanism to reduce<br>bile acid reuptake and<br>protect liver | |
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| AX-0810 reduces bile acid accumulation in<br>hepatocytes by modulating NTCP activity<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 8<br>Halilbasic E, et al. J Hepatol. 2013 Jan;58(1):155-68; Nyholm I, et al. J Hepatol. 2025 Aug;83(2):440-452.<br>HEALTHY LIVER<br>Normal bile acids homeostasis in<br>hepatocytes<br>NTCP WT<br>Bile duct<br>LIVER WITH<br>CHOLESTATIC DISEASE<br>High concentration of bile acids in<br>hepatocytes<br>Bile duct<br>NTCP WT<br>AX-0810 STRATEGY FOR<br>DISEASED LIVER<br>AX-0810 restore bile acids homeostasis in<br>the hepatocytes<br>NTCP Q68R<br>Bile duct<br> ↓ hepatocyte toxicity<br> ↓ inflammation/ fibrosis<br>Blood Blood Blood | |
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| 0.0<br>0.5<br>1.0<br>1.5<br>Relative mRNA expression<br>NTCP modulation reduces fibrosis markers<br>and elevates circulating bile acids<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 9<br>NTCP channel blocking increases plasma bile acids<br>concentrations, up to 3-fold in cholestatic disease<br>mouse model<br>Pro-fibrotic markers show reduced expression<br>after NTCP channel blocking<br>0<br>1<br>2<br>3<br>4<br>Plasma conjugated BS<br>(Fold change vs. control)<br>Plasma bile acids<br>*<br>NTCP blocker<br>- +<br>* *<br>*<br>*<br>NTCP blocker<br>- + - + - + - +<br>Timp α-Sma Tgf-β1 Col1a1<br>Liver fibrosis markers<br>Bulevirtide (Hepcludex) is a daily SC injected NTCP inhibitor approved for Hepatitis D. Slijepcevic D, et al. Hepatology. 2018 Sep;68(3):1057-1069. | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 10<br>Assessing Safety, PK and Target Engagement<br>of AX-0810 in First-in-Human Trial<br>CTA, Clinical Trial Application; DMC, Data Monitoring Committee; MAD, Multiple Ascending Dose; PK, Pharmacokinetics; TUDCA, Tauroursodeoxycholic acid; AX-0810 CTA has been approved in Europe (October 2025).<br>DMC safety reviews before proceeding to next dose and dose escalation is sequential during the dosing phase<br>Patient cohort<br>Cohort 1 (3mg/kg) 12-weeks follow-up<br>Cohort 2 (6mg/kg) 12-weeks follow-up<br>Cohort 3 (9mg/kg) 12-weeks follow-up<br>Multiple ascending dose (MAD) N=33 (24 on treatment, 9 on placebo)<br>Phase 1 progressing<br>Initial AX-0810 data demonstrate<br>no safety signals and<br>pharmacokinetics consistent with<br>non-clinical models<br> • Target engagement data on track<br>for H1 2026<br>Treatment<br>AX-0810 GalNAc conjugated editing oligonucleotide<br>Objectives<br> • Assess safety, tolerability, and PK of AX-0810<br> • Confirm target engagement as measured by<br>biomarkers<br>Key endpoints<br> • Change in bile acids levels<br> • Bile acids profile<br> • TUDCA challenge<br> • Liver biomarkers | |
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| Biliary atresia is a severe pediatric disease<br>with no approved therapies<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026<br>Adike A, et al. Expert Rev Gastroenterol Hepatol. 2018 Oct;12(10):1025-1032; Verkade HJ, et al. J Hepatol. 2016 Sep;65(3):631-42; Sundaram SS, et al. Liver Transpl. 2017 Jan;23(1):96-109; Raghu VK, et al. Liver Transpl. 2021 May;27(5):711-718; NORD, 2019, Japanese<br>Biliary Atresia Society. Japanese Biliary Atresia Registry (JBAR). https://jbas.net/en/national-registration/.<br>11<br>DIAGNOSIS<br>Pediatric: in<br>the first weeks<br>of life<br>POPULATION<br>Approximately<br>20,000<br>patients<br>worldwide<br>SYMPTOMS<br>Jaundice, poor<br>weight gain,<br>pale stool, dark<br>urine<br>PROGRESSION<br>Rapid<br>progression<br>to cirrhosis<br>and portal<br>hypertension<br>early in life<br>SIGNIFICANT<br>UNMET NEED<br>No approved<br>pharmacological<br>treatments;<br>60-80% require<br>liver transplant<br>despite Kasai<br>STANDARD<br>OF CARE<br>Kasai procedure<br>as first-line<br>therapy | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 12<br>Biliary atresia as primary indication for AX-0810<br>SEVERITY<br>AND UNMET<br>NEED<br>BIOLOGICAL<br>RATIONALE<br>CLINICAL<br>DE-RISKING<br>CENTRALIZED<br>CARE<br>REGULATORY<br>PATHWAY<br>Leading cause of<br>pediatric liver<br>transplantation<br>and no approved<br>therapies<br>AX-0810 targets<br>the key driver of<br>liver injury in the<br>disease<br>No comorbidities<br>and limited<br>confounding<br>factors<br>Patients<br>concentrated<br>in specialized<br>centers<br>Pediatric<br>guidance and<br>orphan<br>designation<br>potential<br>BILIARY ATRESIA | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 13<br>AI-guided EON design accelerates discovery<br>~90% faster discovery and up to 6× improvement in EON performance<br>Trained on<br>12+ years of<br>PROPRIETARY<br>AXIOMER<br>DATA<br>Trained on<br>experimentally-validated editing<br>outcomes of<br>numerous EONS<br>and targets<br>AI enables<br>discovery of<br>BETTER-PERFORMING<br>EONs<br>Models trained on<br>our in-house data<br>generate EONs<br>with higher editing<br>efficiency and<br>greater sequence<br>diversity<br>Robotics-enabled HTS<br>ACCELERATES<br>DESIGN-TEST<br>CYCLES<br>Enabling rapid<br>iteration per target<br>and amplifying<br>AI-driven learning<br>through continuous<br>model<br>improvement<br>0<br>20<br>40<br>60<br>Editing (%)<br>NTCP PNPLA3<br>30 months 6 months<br>Manual Discovery AI Discovery<br>New EON design process | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 14<br>AX-0811: AI-enabled next-gen RNA editing<br>therapy targeting NTCP for cholestatic diseases<br>~3x higher editing efficiency<br> • Improved efficacy and<br>dosing convenience over<br>AX-0810<br>Upcoming development<br>milestones<br> • AX-0811 program<br>advancing rapidly, with CTA<br>filing in mid-2026<br> • Initial clinical data in<br>healthy volunteers<br>expected before<br>year-end 2026<br>Editing of hNTCP in livers of humanized mice<br>SC administration, GalNAc EONs, 30mg/kg,<br>10 doses, n=3-4, D24, dPCR, Mean, SEM<br>Untreated AX-0810 AX-0811<br>0<br>20<br>40<br>60<br>80<br>Editing (%)<br>3x higher<br>editing<br>In vivo | |
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| Assessing Safety, PK and Target Engagement<br>of AX-0811 in First-in-Human Trial<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 15<br>CTA enabling activities<br>ongoing<br> • CTA filing in mid 2026<br> • Target engagement data<br>expected by year-end<br>2026<br>Treatment<br>AX-0811 GalNAc conjugated editing oligonucleotide<br>Objectives<br> • Assess safety, tolerability, and PK of AX-0811<br> • Confirm target engagement as measured by biomarkers<br>Key endpoints<br> • Change in bile acids levels<br> • Bile acids profile<br> • TUDCA challenge<br> • Liver biomarkers<br>CTA, Clinical Trial Application; DMC, Data Monitoring Committee; MAD, Multiple Ascending Dose; PK, Pharmacokinetics; TUDCA, Tauroursodeoxycholic acid<br>DMC safety reviews before proceeding to next dose and dose escalation is sequential during the dosing phase<br>Cohort 1 12-weeks follow-up<br>Cohort 2 12-weeks follow-up<br>Cohort 3 (optional) 12-weeks follow-up<br>Multiple ascending dose (MAD) N=33 (24 on treatment, 9 on placebo) | |
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| NTCP FRANCHISE<br>AX-0811<br>ProQR building a leading NTCP franchise in<br>cholestatic disease<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 16<br>Rapid path to<br>patients with<br>high unmet<br>medical need<br>Establishes<br>clinical<br>validation<br>Awareness<br>amongst<br>physicians and<br>centers of<br>excellence<br>AI-discovered<br>next-gen<br>candidate<br>with enhanced<br>efficiency<br>Optimized<br>Dose and<br>scalability<br>AX-0810<br>NTCP FRANCHISE | |
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| AX-0422 RNA editing therapy<br>to address Hurler Syndrome<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 17<br>GAGs: glycosaminogylcans; MPS1: Mucopolysaccharidosis type I. 1Baldo G, et al, 2018, https://doi.org/10.1111/cge.13224<br>HURLER SYNDROME<br> • Most severe form of<br>MPS1<br> • Early onset, multi-symptom disease<br> • Progressive deterioration,<br>high morbidity<br> • Current therapies do not<br>address all comorbidities<br>and have limitations<br>IDUA DEFICIENCY<br> • W402X mutation<br>(c. 1293G>A; p.W402X)<br>is present in up to 60%<br>of patients with severe<br>phenotype1<br> • Causes IDUA deficiency,<br>leading to toxic<br>accumulation of GAGs<br>CLINICAL DE-RISKING<br> • AX-0422 corrects the<br>W402X mutation back<br>to WT<br> • Restores endogenous<br>enzyme production,<br>leading to GAGs<br>clearance<br> • Potential to impact<br>systemic and CNS disease | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 18<br>Increases in IDUA enzymatic activity drive<br>meaningful clinical impact<br>A restoration of<br>1-15% of normal<br>IDUA enzymatic<br>function2 can<br>improve phenotype<br>Scheie Hurler-Scheie Hurler<br>Diagnosis Teens Childhood < 18 months<br>Life expectancy Normal 20 yo 10 yo<br>Enzymatic activity in<br>fibroblasts<br>(% of WT)1<br>0.8% 0.3% 0.2%<br>1Oussoren E, et al. Mol Genet Metab. 2013 Aug;109(4):377-81; 2Kakkis ED, et al. N Engl J Med. 2001 Jan 18;344(3):182-8.<br>Severity | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 19<br>RNA editing achieves therapeutically meaningful<br>enzyme restoration in Idua mouse model<br>1AX-0422 surrogate treatment of Idua-W392X mice, SC, 30 mg/kg, Q1W until 8 wks, data at 8 weeks, n=6, mean, SEM; 2AX-0422 surrogate treatment of Idua-W392X mice, SC, 10 and 30 mg/kg, Q1W until 4 wks, n=4-6, mean, SEM<br>Following SC delivery, targeted editing of the W402X mutation restores ~21% IDUA activity,<br>driving substantial liver GAG reduction and dose-dependent normalization of urinary GAGs -<br>supporting potential for disease-modifying benefit<br>Liver GAGs levels1 Urine GAGs levels2 Liver IDUA enzymatic activity RNA Editing of 1 Idua in liver1<br>Untreated AX-0422<br>0<br>5<br>10<br>15<br>20<br>25<br>WT IDUA activity (%)<br>~21% WT<br>Untreated AX-0422<br>0<br>2<br>4<br>6<br>Editing (%)<br>Untreated AX-0422<br>0.0<br>0.5<br>1.0<br>1.5<br>GAGs (ug/mg tissue)<br>54% ↓<br>1 wks 4 wks 8 wks<br>0<br>50<br>100<br>GAGs relative to baseline (ug)<br>Untreated AX-0422<br>10 mg/kg<br>AX-0422<br>30 mg/kg | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 20<br>AX-0422 shows differentiated activity vs<br>standard of care in Idua mouse model<br>Greater biomarker reduction and functional improvement vs ERT<br>1Idua-W392X mice, AX-0422 surrogate treatment: SC, 30 mg/kg, ERT (Laronidase) treatment: IV, 0.58 mg/kg, Q1W until 4 wks, n=6, mean, SEM<br>AX-0422 delivers reduction in urinary GAGs compared<br>to ERT, approaching biomarker normalization<br>AX-0422 shows improvement in motor skills<br>test compared to ERT<br>Direction of improvement<br>Untreated ERT AX-0422<br>0<br>100<br>200<br>300<br>uGAG relative to baseline (ug)<br>Urine GAGs levels at 8 weeks1<br>-60%<br>-90%<br>Untreated ERT AX-0422<br>0<br>5<br>10<br>15<br>20<br>Improvement vs. Non Treated (% points)<br>Hang Test at 10 weeks1<br>+4%<br>+11% | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 21<br>AX-0422 achieves robust, durable CNS<br>editing with functional enzyme restoration<br>1AX-0422 surrogate treatment of Idua-W392X mice ICV, 250μg, single dose, n=6, 4 weeks, ddPCR, mean, SEM / western blot, mean, SEM; 2IT administration, 10.6mg AX-0422 surrogate treatment, single dose, n=3, up to 12 weeks, ddPCR, mean, SD<br>RNA Editing of Idua in cortex<br>of Idua-W392X mice1<br>Untreated AX-0422<br>0<br>10<br>20<br>30<br>Editing (%)<br>4 wks 8 wks 12 wks<br>0<br>20<br>40<br>60<br>80<br>Editing (%)<br>Temporal<br>Cortex<br>Frontal<br>Cortex<br>Parietal<br>Cortex<br>Sustained RNA editing of<br>ACTB in cortex of NHP2<br>0.0<br>0.5<br>1.0<br>IDUA activity (nmol/24h/mg)<br>~11.5% WT<br>~8.5% WT<br>~11.5% WT<br>~8% WT<br>~7.5% WT<br>Cortex Hippocampus Midbrain Cerebellum Brainstem<br>IDUA enzymatic activity in the brain of Idua-W392X mice1 (% WT recovery)<br> • Axiomer results in sustained CNS editing of up to 12 weeks (single dose, NHP)<br> • Following ICV delivery, efficient editing in Hurler disease model leads to broad<br>enzyme restoration across brain regions (~7–12% of WT)<br> • Levels consistent with<br>disease-modifying potential<br>in Hurler syndrome<br>Untreated AX-0422 | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 22<br>AX-0422 positioned to redefine the standard<br>of care in Hurler Syndrome<br>Positioned to deliver systemic and neurological benefit through a single,<br>targeted mechanism<br>DIFFERENTIATED<br>APPROACH<br> • Impact liver and neurological driven<br>symptoms<br> • Convenient, infrequent dosing potential<br> • Avoids limitations of SoC<br>HIGH AXIOMER<br>PLATFORM POTENTIAL<br> • RNA editing restores endogenous<br>enzyme production<br> • Preclinical data show relevant enzyme<br>restoration, biomarker and functional<br>improvement | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 23<br>AX-0422 preliminary clinical development<br>A two-step approach with liver delivery followed by CNS delivery<br>DS: dermatan sulfate; HS: heparan sulfate<br>Subcutaneous administration for Liver<br> • Primary objective: safety, tolerability<br> • Secondary: pharmacokinetics<br> • Exploratory PD and clinical measures: plasma IDUA<br>enzyme activity and protein level; HS and DS levels<br> • Development candidate selected<br> • CTA filing in early 2027<br> • First-in-human trial clinical biomarker data in<br>patients in H1 2027<br>Dose level 1<br>Dose level 2<br>Dose level 3<br>Intrathecal administration for CNS<br>Dose level 1<br>Dose level 2<br>Interim<br>biomarker readout<br>in H1 2027 | |
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| 1Sandireddy R, et al. Front Cell Dev Biol. 2024 Jul 16;12:1433857; 2Tsedendorj Yumchinsuren et al., 2025; 3 Sookoian Silvia et al., 2011; 4 Souza Matheus et al., 2024; 5Chen, Yunzhi et al, 2020<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 24<br>AX-2911 RNA editing therapy to address metabolic<br>dysfunction-associated steatohepatitis (MASH)<br>MASH<br> • Highly prevalent and<br>increasing worldwide<br> • Progression to cirrhosis,<br>liver cancer and liver-related mortality<br> • Limited treatment<br>options1 highlight the<br>significant unmet<br>medical need, particularly<br>in lean MASH patients<br>PNPLA3 I148M<br>Patatin-like phospholipase<br>domain-containing3 variant<br> • Strongest genetic risk<br>factor for disease<br>progression<br> • ~50% of MASH patients2-4<br> • Associated with higher<br>liver fat, NASH risk, and<br>fibrosis progression<br> • Carriers may<br>show reduced response<br>to GLP-1 agonists5<br>RESTORING<br>WT-LIKE PNPLA3<br> • AX-2911 restores PNPLA3<br>I148M (Met→Val)<br>function<br> • Targets MASH primary<br>genetic driver, unlike<br>metabolic therapies<br> • Broad potential,<br>including GLP-1-low<br>response and lean MASH<br>patients | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 25<br>Editing has functional advantage over knockdown<br>AX-2911 substantially reduces liver fat vs clinical-stage ASO2<br>1N=4-6, 20mg/kg, 14 doses, GalNAc conjugated-AX-2911 or 0.7mg/kg, 14 doses, AZ AZD2693 treatment, SC, readout at day D28; 2AZ AZD2693 previously evaluated in Phase 2b<br>AX-2911 leads to 23%<br>editing of<br>hPNPLA3 mRNA<br>0<br>10<br>20<br>30<br>Editing (%)<br>Editing<br>82% reduction of<br>macrovesicular lipid<br>droplets<br>0<br>50<br>100<br>hPNPLA3 total expression (%)<br>hPNPLA3 I148M humanized mouse liver model1<br>dPCR (Qiagen), AVG±SEM<br>Clinical-stage ASO2:<br>~89% mRNA reduction<br>via knockdown of<br>hPNPLA3<br>89%<br>Knockdown<br>Liver sections of steatosis mouse model<br>treated with ASO2 or AX-29111<br>PNPLA3 I148M humanized FRG mouse, WD 4W+4W<br>Clinical-stage<br>ASO2 Untreated AX-2911<br>0<br>50<br>100<br>% of macrovesicular hepatic steatosis<br>82%<br>36%<br>Macrovesicular steatotic<br>incidence scoring1 (%)<br>AVG±SEM<br>Clinical stage ASO AX-2911 Untreated 1 Clinical stage ASO AX-2911 Untreated 1<br>mRNA LIVER FUNCTION (steatosis)<br>23% | |
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| ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 26<br>AX-2911 development strategy<br>Exploring an Investigator-Initiated Trial (IIT) in China<br>OBJECTIVE<br>Generate early proof-of-concept in patients<br>De-risk the program and<br>inform development<br>strategy<br>ACCELERATED<br>APPROACH<br>Parallel preparation for<br>global CTA/IND<br>development<br>EXPECTED<br>TIMELINE<br>FIH in H1 2027<br>Interim readouts to<br>guide next steps | |
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| Progress undisclosed<br>DEVELOPMENT PIPELINE<br>AX-0810<br>for Cholestatic diseases<br>NTCP Modulate Target engagement data<br>1H 2026 ~100K<br>patients AX-0811<br>for Cholestatic diseases<br>NTCP Modulate Target engagement<br>data in 2026<br>AX-0422<br>for Hurler Syndrome<br>IDUA Correct CTA filing early 2027;<br>Clinical biomarkers in H1 2027<br>~500-1000<br>patients<br>AX-2911<br>for MASH<br>PNPLA3 Correct FIH H1 2027 ~8M<br>patients<br>AX-2402<br>for Rett syndrome<br>MECP2<br>R270X Correct ~5K<br>PARTNERED PIPELINE<br>10 undisclosed targets<br>(option to expand to 15)<br>ProQR Therapeutics – Investor & Analyst Event - April 8, 2026 27<br>ProQR development pipeline and milestones<br>TARGET<br>AXIOMER<br>APPLICATION DISCOVERY NON-CLINICAL CLINICAL MILESTONES<br>ESTIMATED<br>POPULATION | |
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| IT’S IN<br>OUR RNA | |
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Exhibit 99.2
ProQR Highlights Pipeline Expansion and Multiple Upcoming Clinical Catalysts at Investor and Analyst Event
| · | AX-0810 clinical target engagement data in healthy volunteers on track for this quarter; biliary atresia selected as initial Phase<br>2 indication |
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| · | Additional programs advancing toward the clinic, including AX-0811 and AX-0422 |
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| · | Axiomer platform supporting multiple additional clinical data readouts within current runway |
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LEIDEN, Netherlands & CAMBRIDGE, Mass., April 8, 2026 – ProQR Therapeutics N.V. (Nasdaq: PRQR) (ProQR), a company dedicated to changing lives through transformative RNA therapies based on its proprietary Axiomer™ RNA editing technology platform, today highlighted key updates from its virtual Investor and Analyst event hosted today.
During the event, ProQR provided an overview of its RNA editing pipeline and development strategy, emphasizing its lead clinical program AX-0810, expansion of its pipeline with two new programs announced, and multiple clinical data readouts within its current runway.
“Today’s event highlighted the progress we are making across our pipeline and the strength of the Axiomer platform,” said Daniel A. de Boer, Founder and Chief Executive Officer of ProQR. “We look forward to the target engagement data with AX-0810 later this quarter and are excited about additional programs approaching the clinic, building a pipeline with multiple clinical readouts in the runway. At the same time, we are continuing to enhance our discovery capabilities, through AI-enabled and automated approaches, which are already supporting the advancement of next-generation programs.”
AX-0810 Advancing Toward Target Engagement Data
AX-0810, ProQR’s lead RNA editing program targeting NTCP, remains on track to report target engagement data from healthy volunteers in the first half of 2026. The company also announced the selection of biliary atresia as the initial indication for Phase 2 development, based on strong biological rationale, high unmet need, and the anticipated development path.
Pipeline Expansion
ProQR highlighted continued expansion of its pipeline, including:
| · | AX-0811, a next-generation NTCP program for cholestatic diseases generated by ProQR’s AI-enabled discovery engine, with CTA<br>filing expected in mid 2026 and initial clinical data anticipated by year-end 2026; |
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| · | AX-0422, targeting IDUA for Hurler syndrome, with CTA filing expected in early 2027 and initial clinical data anticipated in the first<br>half of 2027; |
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| · | AX-2911, targeting PNPLA3 for MASH, advancing toward early clinical data generation with plans for a first-in-human (FIH) investigator-initiated<br>trial (IIT) in China in H1 2027. |
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Advancing the Axiomer Platform
ProQR also discussed continued advancement of the Axiomer platform, including the application of AI-enabled discovery and high-throughput screening supported by a partnership with Ginkgo Bioworks, to support the design and optimization of RNA editing therapeutics.
ProQR expects to deliver multiple clinical data readouts across its pipeline within its current cash runway, which extends into mid-2027.
A replay of the webcast and the presentation slides are available on ProQR’s website, www.proqr.com, under “Events”.
About Axiomer^™^
ProQR is pioneering a next-generation RNA base editing technology called Axiomer^™^, which could potentially yield a new class of medicines for diverse types of diseases. Axiomer^™^ “Editing Oligonucleotides”, or EONs, mediate single nucleotide changes to RNA in a highly specific and targeted way using molecular machinery that is present in human cells called ADAR (Adenosine Deaminase Acting on RNA). Axiomer^™^ EONs are designed to recruit and direct endogenously expressed ADARs to change an Adenosine (A) to an Inosine (I) in the RNA – an Inosine is translated as a Guanosine (G) – correcting an RNA with a disease-causing mutation back to a normal (wild type) RNA, modulating protein expression, or altering a protein so that it will have a new function that helps prevent or treat disease.
About ProQR
ProQR Therapeutics is dedicated to changing lives through the creation of transformative RNA therapies. ProQR is pioneering a next-generation RNA technology called Axiomer^™^, which uses a cell’s own editing machinery called ADAR to make specific single nucleotide edits in RNA to reverse a mutation or modulate protein expression and could potentially yield a new class of medicines for both rare and prevalent diseases with unmet need. Based on our unique proprietary RNA repair platform technologies we are growing our pipeline with patients and loved ones in mind.
Learn more about ProQR at www.proqr.com.
Forward Looking Statements
This press release contains forward-looking statements. All statements other than statements of historical fact are forward-looking statements, which are often indicated by terms such as “continue,” "anticipate," "believe," "could," "estimate," "expect," "goal," "intend," "look forward to", "may," "plan," "potential," "predict," "project," "should," "will," "would" and similar expressions. Such forward-looking statements include, but are not limited to, statements regarding our business, technology, strategy, preclinical and clinical model data; our initial pipeline targets and the upcoming strategic priorities and milestones related thereto; our new pipeline targets, the continued advancement of our lead development pipeline programs, including approved, ongoing and planned clinical trials; expectations regarding the ongoing Phase 1 clinical study of AX-0810 in NTCP for cholestatic diseases; expectations regarding the safety and therapeutic benefits of AX-0810, including the planned dosing levels and their efficacy; the anticipated timing of initial Phase 1 clinical data for our lead program in healthy volunteers, AX-0810, in H1, 2026, and clinical updates across multiple programs in 2026; the anticipated development path in relation to the selection of biliary atresia as the initial indication for AX-0810 Phase 2 development; our new pipeline targets, including the planned Phase 1 clinical trial of AX-0811 in NTCP for cholestatic diseases, our ability to recruit for and complete a Phase 1 clinical trial for AX-0811, an anticipated CTA filing and the Phase 1b cohort 1 data readout for AX-0811 pending regulatory clearance, expectations regarding the efficacy, clinical development timeline, and expected trial designs and development of AX-0422 and AX-2911, including the potential CTA filings and data readout pending regulatory clearance; clinical updates across multiple programs in 2026 and 2027; the therapeutic potential and development timeline regarding AX-0810, AX-0811, AX-0422, AX-2911 and AX-2402; the anticipated benefits from our partnership with Ginkgo Bioworks; the continued development and advancement of our Axiomer^™^ platform; the therapeutic potential of our Axiomer RNA editing oligonucleotides and product candidates; the timing, progress and results of our preclinical studies and other development activities, including the release of data related thereto; our patent estate, including our anticipated strength and our continued investment in it; and the potential of our technologies and product candidates; and our cash runway. Forward-looking statements are based on management's beliefs and assumptions and on information available to management only as of the date of this press release. Our actual results could differ materially from those expressed or implied by these forward-looking statements for many reasons, including, without limitation, the risks, uncertainties and other factors in our filings made with the Securities and Exchange Commission, including certain sections of our most recent annual report filed on Form 20-F. These risks and uncertainties include, among others, the cost, timing and results of preclinical studies and clinical trials and other development activities by us and our collaborative partners whose operations and activities may be slowed or halted shortage and pressure on supply and logistics on the global market, economic sanctions, U.S. government shutdown and international tariffs; the likelihood of our preclinical and clinical programs being initiated and executed on timelines provided and reliance on our contract research organizations and predictability of timely enrollment of subjects and patients to advance our clinical trials and maintain their own operations; our reliance on contract manufacturers to supply materials for research and development and the risk of supply interruption from a contract manufacturer; the potential for future data to alter initial and preliminary results of early-stage clinical trials; the unpredictability of the duration and results of the regulatory review of applications or clearances that are necessary to initiate and continue to advance and progress our clinical programs; the ability to secure, maintain and realize the intended benefits of collaborations with partners, including the collaboration with Lilly; the possible impairment of, inability to obtain, and costs to obtain intellectual property rights; possible safety or efficacy concerns that could emerge as new data are generated in research and development; general business, operational, financial and accounting risks, and risks related to litigation and disputes with third parties; and risks related to macroeconomic conditions and market volatility resulting from global economic developments, geopolitical events and conflicts, high inflation, rising interest rates, tariffs and potential for significant changes in U.S. policies and regulatory environment. Given these risks, uncertainties and other factors, you should not place undue reliance on these forward-looking statements, and we assume no obligation to update these forward-looking statements, even if new information becomes available in the future, except as required by law.
ProQR Therapeutics N.V.
Investorand media contact:
Sarah Kiely
ProQR Therapeutics N.V.
T: +1 617 599 6228
skiely@proqr.com
or
**Investor contact:**Peter Kelleher
LifeSci Advisors
T: +1 617 430 7579
pkelleher@lifesciadvisors.com