false 0001539029 0001539029 2021-06-15 2021-06-15





Washington, DC 20549







Pursuant to Section 13 or 15(d)

of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported): June 15, 2021



Clearside Biomedical, Inc.

(Exact name of registrant as specified in its charter)




Delaware   001-37783   45-2437375

(State or other jurisdiction

of incorporation)



File Number)

  (IRS Employer
Identification No.)

900 North Point Parkway, Suite 200

Alpharetta, GA 30005

(Address of principal executive offices, including zip code)

(678) 270-3631

(Registrant’s telephone number, including area code)


(Former name or former address, if changed since last report)



Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:


Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)


Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)


Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))


Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class





Name of each exchange

on which registered

Common Stock, par value $0.001 per share   CLSD   The Nasdaq Stock Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company  

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  .




Item 7.01

Regulation FD Disclosure.

On June 15, 2021, Clearside Biomedical, Inc. (the “Company”) updated its corporate presentation for use in meetings with investors, analysts and others. The presentation is available through the Company’s website and a copy is attached as Exhibit 99.1 to this Current Report on Form 8-K.

The information in this Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1, is being furnished pursuant to Item 7.01 and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) or otherwise subject to the liabilities of that section, and it shall not be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, or under the Exchange Act, whether made before or after the date hereof, except as expressly set forth by specific reference in such filing to this item of this report.


Item 8.01

Other Events.

On June 15, 2021, the Company issued a press release entitled “Clearside Biomedical Announces Positive Safety Results from Cohort 1 of OASIS Phase 1/2a Clinical Trial of CLS-AX (axitinib injectable suspension) for the Treatment of Wet AMD.” The full text of the press release is attached as Exhibit 99.2 to this Current Report on Form 8-K and incorporated herein by reference.


Item 9.01

Financial Statements and Exhibits.

(d) Exhibits




Exhibit Description

99.1    Corporate Presentation
99.2    Press Release, dated June 15, 2021
104    Cover Page Interactive Data File (embedded within the Inline XBRL document)


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 hereunto duly authorized.


Date: June 15, 2021     CLEARSIDE BIOMEDICAL, INC.

/s/ Charles A. Deignan

    Name:   Charles A. Deignan
    Title:   Chief Financial Officer

Slide 1

Corporate Presentation | June 2021 Exhibit 99.1

Slide 2

Forward-Looking Statements This presentation contains forward-looking statements as defined in the Private Securities Litigation Reform Act of 1995, as amended. The words “may,” “will,” “could,” “would,” “should,” “expect,” “plan,” “anticipate,” “intend,” “believe,” “estimate,” “predict,” “project,” “potential,” “continue,” “target” and similar expressions are intended to identify forward-looking statements, although not all forward-looking statements contain these identifying words. Clearside Biomedical, Inc.’s views as of the date of this presentation about future events and are subject to risks, uncertainties, assumptions, and changes in circumstances that may cause Clearside’s actual results, performance, or achievements to differ significantly from those expressed or implied in any forward-looking statement. Although Clearside believes that the expectations reflected in the forward-looking statements are reasonable, Clearside cannot guarantee future events, results, performance, or achievements. Some of the key factors that could cause actual results to differ from Clearside’s expectations include its plans to develop and potentially commercialize its product candidates; Clearside’s planned clinical trials and preclinical studies for its product candidates; the timing of and Clearside’s ability to obtain and maintain regulatory approvals for its product candidates; the extent of clinical trials potentially required for Clearside’s product candidates; the clinical utility and market acceptance of Clearside’s product candidates; Clearside’s commercialization, marketing and manufacturing capabilities and strategy; Clearside’s intellectual property position; and Clearside’s ability to identify additional product candidates with significant commercial potential that are consistent with its commercial objectives. For further information regarding these risks, uncertainties and other factors you should read the “Risk Factors” section of Clearside’s Annual Report on Form 10-K for the year ended December 31, 2020, filed with the SEC on March 15, 2021, and Clearside’s other Periodic Reports filed with the SEC. Clearside expressly disclaims any obligation to update or revise the information herein, including the forward-looking statements, except as required by law. This presentation also contains estimates and other statistical data made by independent parties and by Clearside relating to market size and growth and other data about its industry. This data involves a number of assumptions and limitations, and you are cautioned not to give undue weight to such estimates. In addition, projections, assumptions and estimates of Clearside’s future performance and the future performance of the markets in which Clearside operates are necessarily subject to a high degree of uncertainty and risk.

Slide 3

Versatile Therapeutic Platform SCS Microinjector® with proprietary drug formulations target the Suprachoroidal Space Proprietary Access to the Suprachoroidal Space (SCS®) Utilization Across Small Molecules and Gene Therapy Ability to Target Multiple Ocular Diseases Internal Research & Development Pipeline External Collaborations for Pipeline Expansion Developing and Delivering Treatments that Restore and Preserve Vision for People with Serious Back of the Eye Diseases

Slide 4

Core Advantages of Treating Via the Suprachoroidal Space Sources: Rai UDJ, Young SA, Thrimawithana TR, et al. The suprachoroidal pathway: a new drug delivery route to the back of the eye. Drug Discov Today. 2015;20(4):491-495. | Moisseiev E, Loewenstein A, Yiu G. The suprachoroidal space: from potential space to a space with potential. Clin Ophthalmol. 2016;10:173-178. | Chiang B, Jung JH, Prausnitz MR. The suprachoroidal space as a route of administration to the posterior segment of the eye. Adv Drug Deliv Rev. 2018;126:58-66. TARGETED The back of the eye is the location of many irreversible and debilitating visual impairments BIOAVAILABLE & PROLONGED DRUG LEVELS Fluid spreads circumferentially and posteriorly when injected within the suprachoroidal space, bathing the choroid and adjacent areas with drug COMPARTMENTALIZED Drug is compartmentalized in the suprachoroidal space, which helps keep it away from non-diseased tissues and entirely behind the visual field for efficacy for safety for durability

Slide 5

Administration of any drug to the suprachoroidal space by microinjection Administration of any drug to the eye by inserting a microinjector into the sclera SCS Microinjector features Methods of using SCS Microinjector for drug delivery Device using an adjustable needle Pioneers in the Suprachoroidal Space (SCS®) with Patented Technology DEVICE PATENTS DRUG PATENTS Methods of treating posterior ocular disorders by SCS administration DISEASE PATENTS Key Intellectual Property Components Comprehensive IP portfolio that includes protection of: SCS delivery technology, proprietary SCS Microinjector, treatment of various conditions with SCS administration of therapeutic products 24 U.S. and >50 European and International issued patents with multiple pending patent applications Granted patents provide exclusivity for our delivery technology and product candidates to mid-2030s with pending applications potentially extending exclusivity beyond 2040

Slide 6

Clearside's SCS Microinjector®: The Only Clinically Tested Injection Device for Suprachoroidal Drug Delivery Clinically tested in >1200 suprachoroidal Injections 8 clinical trials completed Injections performed across multiple retinal disorders Safety profile comparable to intravitreal injections1 No Serious Adverse Events (SAEs) involving lens injury, suprachoroidal hemorrhage, or endophthalmitis have been observed 4 clinical trials ongoing including partner programs SUPRACHOROIDAL SPACE INJECTION Novel SCS Microinjector® allows for precise delivery into the suprachoroidal space Sources: Clearside data on file | 1Kurup, et. al, Macula Society 2021 Safety of the Suprachoroidal Injection Procedure Utilizing SCS Microinjector® across Three Retinal Disorders

Slide 7

Exclusive Access to the Back of the Eye Using Clearside’s Proprietary SCS Microinjector®

Slide 8

CLS-AX Delivered with SCS Microinjector® for Wet AMD

Slide 9

Suprachoroidal Space (SCS®) Injection Platform PARTNER THERAPEUTC ENTITY INDICATION IND-Enabling PHASE 2 PHASE 3 NDA REGENXBIO AAV-based Gene Therapy Wet AMD (AAVIATE) REGENXBIO AAV-based Gene Therapy Diabetic Retinopathy (ALTITUDE) AURA BIOSCIENCES Viral-like Drug Conjugate Ocular Oncology/Choroidal Melanoma XIPERE™ (triamcinolone acetonide suprachoroidal injectable suspension) is an investigational product SCS Microinjector® Partner Programs XIPERE™ Commercial Partners PARTNER THERAPEUTC ENTITY TERRITORY PRE-CLINICAL PHASE 1 PHASE 2 PHASE 3 NDA BAUSCH HEALTH Small Molecule U.S. & Canada; options ex-North America ARCTIC VISION Small Molecule Greater China & South Korea PROGRAM THERAPEUTC ENTITY INDICATION RESEARCH PRECLINICAL PHASE 1/2 PHASE 3 CLS-AX (axitinib injectable suspension) Small Molecule Wet AMD Integrin Inhibitor (Injectable suspension) Small Molecule Diabetic Macular Edema (DME) Gene Therapy Non-Viral Vectors “Therapeutic Biofactory” / Inherited Retinal Disease Internal Development Pipeline PDUFA 10/30/21

Slide 10

Macular edema is the leading cause of vision loss in patients with non-infectious uveitis NDA was resubmitted and accepted for review with PDUFA goal date of October 30, 2021 Commercialization and development partnerships to enhance value and expand patient access XIPERE™: Potential Suprachoroidal Approach to Treating Uveitic Macular Edema XIPERE™ is an investigational product If approved, XIPERE would represent the FIRST therapy for macular edema associated with uveitis FIRST uveitis trial using visual acuity change as a primary endpoint (Phase 3 PEACHTREE) FIRST approved therapeutic delivered into the suprachoroidal space FIRST commercial product for Clearside

Slide 11

Sources for in-vitro IC50 range: Stellato et al. J Allergy Clin Immol. 1999 volume 104, number 3, part 1 | Yuan et al. Haematologica 2017 Mar, 102(3) 466-475 | Inlyta, EMA 2012 May; CHMP assessment report | 2014 R13 HAE conference, Che, Wilson, Babu, Preclinical Characterization of BCX4161, an oral plasma kallikrein inhibitor, for the treatment of Hereditary Angioedema. Preclinical Data Supports Durability Potential of Small Molecule Suspensions Delivered into the Suprachoroidal Space

Slide 12

CLS-AX (axitinib injectable suspension) for Suprachoroidal Injection

Slide 13

AMD causes a progressive loss of central vision and is the most common cause of blindness in individuals over age 55 Neovascular or Wet AMD accounts for the majority of blindness U.S. prevalence expected to increase to 22 million by the year 2050 Global prevalence expected to increase to 288 million by the year 2040 Current treatments require frequent injections causing reduced compliance Under-treatment contributes to limited outcomes Age-Related Macular Degeneration (AMD) A large and growing market opportunity Sources: Medscape: F Ryan Prall, MD, et al Assistant Professor of Ophthalmology, Indiana University School of Medicine | Pennington, Katie L and DeAngelis, Margaret M Eye and Vision, Epidemiology of age-related macular degeneration (AMD): associations with cardiovascular disease phenotypes and lipid factors , Dec 22, 2016. 170 million patients worldwide 10-20% patients wet AMD 11 million U.S. Patients

Slide 14

Ceiling of efficacy Treatment burden Limited outcomes with current regimens CURRENT THERAPY On-label dosing involves fixed frequent injections With on-label anti-VEGF dosing, at 1 year1-3: ~1/5 of patients lose BCVA ~1/2 do not achieve ≥ 20/40 ~2/3 do not gain ≥ 3 lines BCVA In clinical trials, more intensive anti-VEGF regimens or dosage yield no additional BCVA benefit1,6,7 In clinical practice, patients cannot maintain intensive on-label dosing and are undertreated, improving by only 1-3 letters at 1 year4,5 Undertreatment and limited real-world outcomes Current Wet AMD Therapies Lead to Under-Treatment and Limited “Real-World” Clinical Outcomes Sources: 1. Heier JS et al. Ophthalmology. 2012;119:2537-2548. | 2. Brown DM et al. Ophthalmology. 2009;116:57-65.e5. | 3. Rosenfeld PJ et al. N Engl J Med. 2006;355:1419-1431. | 4. Ciulla TA et al. Ophthalmology Retina. 2019 May 25. pii: S2468-6530(19)30280-5. | 5. Rao P, Lum F, Wood K, et al. Ophthalmology. 2018;125:522e528. | 6. Busbee BG et al. Ophthalmology. 2013;120:1046-1056. | 7. Schmidt-Erfurth U et al. Ophthalmology. 2014;121:193-201.

Slide 15

CLS-AX (axitinib injectable suspension) for Suprachoroidal Injection in wet AMD Proprietary CLS-AX suspension formulation Potential to improve the treatment landscape for wet AMD patients Longer lasting treatment may reduce patient burden from monthly injections Targeted high levels to affected choriod-retina for potential efficacy benefits Protecting the vitreous and anterior chamber may eliminate symptomatic floaters and other side effects Given experience with >1200 injections, may be easily adopted in current clinical practice Axitinib is a tyrosine kinase inhibitor (TKI) Delivery via proprietary SCS Microinjector® High potency and pan-VEGF attributes of TKI axitinib

Slide 16

Axitinib: a Highly Potent, pan-VEGF TKI to Treat Wet AMD Axitinib’s intrinsic pan-VEGF inhibition through receptor blockade Approved treatments are focused VEGF-A inhibitors Inhibits VEGFR-1, VEGFR-2, VEGFR-3 receptors More effective than anti-VEGF-A in in-vitro angiogenesis model1-2 Highly potent tyrosine kinase inhibitor (TKI) >10x more potent than other TKIs in preclinical studies Better ocular cell biocompatibility than other TKIs3 More effective than other TKIs for experimental corneal neovascularization in preclinical models Preclinical data showed axitinib inhibition and regression of angiogenesis Sources: 1. Cabral T et al. Bevacizumab Injection in Patients with Neovascular Age-Related Macular Degeneration Increases Angiogenic Biomarkers. Ophthalmol Retina. 2018 January ; 2(1): 31–37. doi:10.1016/j.oret.2017.04.004. | 2. Lieu et al. The Association of Alternate VEGF Ligands with Resistance to Anti-VEGF Therapy in Metastatic Colorectal Cancer. PLoS ONE 8(10): e77117. | 3. Theile et al. Multikinase Inhibitors as a New Approach in Neovascular Age-Related Macular Degeneration (AMD) Treatment: In Vitro Safety Evaluations of Axitinib, Pazopanib and Sorafenib for Intraocular Use. Klin Monatsbl Augenheilkd 2013; 230: 247-254. | Image by Mikael Häggström, used with permission. Häggström, Mikael (2014). "Medical gallery of Mikael Häggström 2014". WikiJournal of Medicine 1 (2). DOI:10.15347/wjm/2014.008. ISSN 2002-4436. Public Domain.

Slide 17

Suprachoroidal Injection of CLS-AX Provides Targeted Delivery Relative to Intravitreal Injection at Same Dose 11x SCS vs IVT Retina / RPE-choroid-sclera 0.003X SCS vs IVT Vitreous humor Aqueous Humor SCS CLS-AX at or below level of detection Rabbit Model Values: area under the curve ratios, SCS / IVT SCS : 1 mg/eye, 100 µL. | IVT: 1 mg/eye, 25 µL Single bilateral injection, 1-wk rabbit PK studies Plasma SCS CLS-AX at or below level of detection Source: Based on Clearside Biomedical preclinical data Abbreviations: SCS: Suprachoroidal Space | IVT: Intravitreal Injection | PK: Pharmacokinetic | LLOQ: lower limit of quantification, 0.15 mg/mL | RPE: Retinal pigment epithelium Concentration (nM) High Retina Levels: Sufficient to block VEGF pathway Low Plasma Levels: <1 ng/mL Time (days) CLS-AX: High, Sustained Drug Levels in the Retina after SCS Administration

Slide 18

CLS-AX has Potential for Meaningful Durability Therapeutic Levels > IC50 for 6 months after 1.05 mg/eye SC Injection in Rabbits Rabbit toxicology study with single bilateral suprachoroidal injection of axitinib, 1.05 mg/eye (n=4 eyes/ timepoint) On day 182, mean axitinib levels in the RPE-choroid-sclera (199 µg/gm) and in the retina (1.1 µg/gm) were 3-5 log orders higher than the in-vitro IC50 value (0.2 ng/mL, VEGFR2 autophosphorylation inhibition assay). Based on this IC50 value, therapeutic levels were achieved in the RPE-choroid-sclera and retina for 6 months after a single suprachoroidal injection of axitinib in rabbits. Source: Translational Vision Science & Technology, 2021, in press.

Slide 19

CLS-AX Has the Potential to Improve Current Wet AMD Treatment SCS Delivery May Synergistically Enhance Pan-VEGF Effect SAFETY EFFICACY TREATMENT BURDEN Well characterized small molecule Potential for less immune response & inflammation vs biological products Better compatibility with retinal pigment epithelial cells vs other TKIs AXITINIB SUPRACHOROIDAL DELIVERY Compartmentalized SCS drug delivery potentially results in few anterior AEs Favorable tolerability profile of SCS Microinjector in >1200 patient injections Use of SCS Microinjector is well accepted by physician-investigators Shows pan-VEGF inhibition Pan-VEGF inhibition shows greater effect preclinically & clinically Regresses neovascularization preclinically >10x the in-vitro potency vs. other TKIs Current anti-VEGF agents only target VEGF-A Targets drug to the diseased chorioretinal tissue in wAMD Shows up to 11x higher drug levels vs intravitreal administration Shown prolonged duration in preclinical studies Potential to have less frequent dosing compared to current anti-VEGF products which may: Limit undertreatment by facilitating better compliance Further enhance clinical outcomes Sources: Clearside Biomedical preclinical and clinical studies | Cabral T et al. Bevacizumab Injection in Patients with Neovascular Age-Related Macular Degeneration Increases Angiogenic Biomarkers. Ophthalmol Retina. 2018 January ; 2(1): 31–37. doi:10.1016/j.oret.2017.04.004. | Lieu et al. The Association of Alternate VEGF Ligands with Resistance to Anti-VEGF Therapy in Metastatic Colorectal Cancer. PLoS ONE 8(10): e77117. | Theile et al. Multikinase Inhibitors as a New Approach in Neovascular Age-Related Macular Degeneration (AMD) Treatment: In Vitro Safety Evaluations of Axitinib, Pazopanib and Sorafenib for Intraocular Use. Klin Monatsbl Augenheilkd 2013; 230: 247-254.

Slide 20

CLS-AX Phase 1/2a Clinical Trial in Wet AMD 2 mg aflibercept dosed at screening CLS-AX dosed at baseline (30 days post screening) Cohort Enrollment and Treatment Open-label study to evaluate safety and tolerability of escalating single doses of CLS-AX administered through suprachoroidal injection following IVT aflibercept 3 Cohorts of 5 patients each: n=15 Dose-escalation of CLS-AX (in mg): Cohort 1 at 0.03; Cohort 2 at 0.10; Cohort 3 currently planned at 0.30 Evaluate visual function, ocular anatomy, and need for additional treatment Assessment for additional therapy: loss from best measurement of >10 letters in BCVA with exudation; increase in CST >75 microns; a vision-threatening hemorrhage Trial Design and Objectives Note: aflibercept is dosed via intravitreal injection (IVT); CLS-AX is dosed via suprachoroidal injection | clinicaltrials.gov NCT# 04626128 Assessment for additional therapy Assessment for additional therapy Assessment for additional therapy Screening Baseline Week 4 Week 8 Week 12

Slide 21

Cohort 1 Objective: To establish a floor of safety in this first-in-human trial with low dose CLS-AX (0.03 mg dose) Patients: Highly treatment-experienced Total number prior anti-VEGF treatments: mean = 25.8, median = 28.0 Total number prior anti-VEGF treatments within the last 12 months: mean = 9.0, median = 11.0 Conclusion Cohort 1 supports progression to Cohort 2 Cohort 1: Encouraging Results Support Progression to Cohort 2 Source: Clearside data on file.

Slide 22

1-month visual acuity improvement of 1 line post CLS-AX vs no change for aflibercept, at this initial low dose Aflibercept: 1-month BCVA change -0.2 ETDRS letters (p=0.862*) CLS-AX 0.03 mg: 1-month BCVA change +4.7 ETDRS letters (p=0.029*) with 5/6 patients improving by 4 or more letters Mean CST stable within 50 µm at one month post 2 mg aflibercept and at one month post 0.03 mg CLS-AX In these treatment-experienced patients, the normal screening baseline CST imposes a floor effect, limiting improvement in CST SAFETY: CLS-AX WELL TOLERATED No study suspension or stopping rules were met No SAEs have been reported No signs of inflammation, vitreous haze, IOP safety signals, vasculitis, or intravitreal dispersion of investigational product 2 TEAEs assessed as unrelated to CLS-AX by the investigators BCVA AND ANATOMIC RESULTS Cohort 1: Summary of Primary and Secondary Measures Source: Clearside data on file. |. *Post hoc, unadjusted

Slide 23

Best Corrected Visual Acuity One Month Response Following Aflibercept 2 mg vs CLS-AX 0.03 mg 1 Mo Change after Aflibercept : -0.2 letters, P=0.862* 1 Mo Change after CLS-AX : +4.7 letters, P=0.029* Source: Clearside data on file. |. *Post hoc, unadjusted

Slide 24

Central Subfield Thickness Mean CST Stable within 50 µm at One Month 1 Mo Change after Aflibercept (2 mg) 1 Mo Change after CLS-AX (0.03 mg) Source: Clearside data on file.

Slide 25

No subjects required additional treatment at 1 month post CLS-AX 2 of 6 subjects did not require additional treatment for 3 months post CLS-AX Cohort 1: Preliminary Signs of Potential Durability at Low Dose in Highly Treatment Experienced and Dependent Patients Therapies for nAMD up to 6 Months Prior to Screening Source: Clearside data on file.

Slide 26

OASIS Cohort 1 Results Support Advancing to Cohort 2 SAFETY CLS-AX well tolerated No signs of inflammation, vitreous haze, IOP safety signals, vasculitis, or intravitreal dispersion of investigational product VISUAL ACUITY At 1 month, 5 of 6 patients had improved BCVA >4 letters (mean +4.7 letters) At 3 months, 2/6 no need for additional therapy and BCVA improved by 5 and 7 letters from baseline ANATOMIC EFFECTS Mean CST stable within 50 µm at 1 month DURABILITY POST CLS-AX No subjects required additional therapy at 1 month 2/6 no need for additional therapy through 3 months 4/6 received additional therapy at 2 months COHORT 1 RESULTS Source: Clearside data on file.

Slide 27

With 3.3x and 10x dosing in cohorts 2 and 3 respectively: We expect progressively increased durability, based on our preclinical pharmacokinetic studies And potential for better visual acuity outcomes than anti-VEGFA based on pan-VEGF inhibition Preclinical pharmacokinetic studies show progressively prolonged tissue levels with increased dosing Cohorts 2 and 3 Continue to Escalate Single CLS-AX Dose Source: Clearside data on file. Cohort 1 0.03 mg Cohort 2 0.1 mg Cohort 3 0.3 mg

Slide 28

Early-Stage Pipeline

Slide 29

The Opportunity Beyond the VEGF pathway Novel target Early industry validation in DME and AMD Advantages of targeted suprachoroidal administration with potential for: Improved safety profile, through compartmentalization in SCS Enhanced efficacy, through drug levels at affected tissues Extended durability Limited potential competition in the non-VEGF approach to treatment Primary Need Targeted delivery addressing disease-modifying pathways beyond anti-VEGF therapy SCS Injection Platform and Integrin Inhibition

Slide 30

Integrin Small Molecule Suspension for SCS administration Note: This image of integrin avβ3 extracellular domains has been released for public use by its creator and original copyright holder: http://www.ebi.ac.uk/. Multi-functional cell-adhesion molecules, heterodimeric receptors with a and β subunits Connect extracellular matrix (ECM) to actin cytoskeleton in the cell cortex Regulate cellular adhesion, migration, proliferation, invasion, survival, and apoptosis Also play a role in inflammation, angiogenesis and fibrosis Targets integrins avβ3, avβ5 and a5β1 implicated in DME, DR & AMD Given unique MOA, could serve as: Primary therapy Adjunctive therapy to anti-VEGF Secondary therapy in refractory cases

Slide 31

Strategic Priority: Seeking a clinical development partner to advance SCS delivery of current gene therapy assets Suprachoroidal Injection of Gene Therapy May Offer Potential for Safe and Efficient Delivery Sources: Clearside data on file. | Campochiaro, P. A. (2019). AAV8-vectored suprachoroidal gene transfer produces widespread ocular transgene expression. Journal of Clinical Investigation. doi: 10.1172/jci129085 The Opportunity Convert gene therapy into an office-based procedure Avoid risks of vitrectomy (surgery) Avoid risks of retinotomy, subretinal injection, and macular detachment Enhance patient access Equivalent expression for subretinal and suprachoroidal administration preclinically Potential for broader retinal coverage & repeat dosing of suprachoroidal vs subretinal injection Delivery of viral and non-viral vectors Preclinical studies with AAV show transfection of photoreceptors

Slide 32

Corporate Partnerships & Milestones

Slide 33

Enabling SCS Delivery of AAV Gene Therapy for Retinal Disease The Opportunity: Gene Therapy Exclusive worldwide rights to our SCS Microinjector for delivery of adeno-associated virus (AAV)-based therapeutics to the suprachoroidal space to treat wet AMD, diabetic retinopathy and other conditions for which anti-VEGF treatment is the standard of care Delivery of gene therapy through the SCS may provide a targeted, in-office, non-surgical treatment approach option Encouraging preclinical results delivering RGX-314 into the SCS SCS delivery of AAV gene therapy well tolerated to date The Terms: Up to an additional $34M in development milestones across multiple indications Up to $102M in sales milestones Mid single digit royalties on net sales of products using SCS Microinjector

Slide 34

REGENXBIO: Two Phase 2 Trials Using SCS Microinjector® Two multi-center, open-label, randomized, controlled, dose-escalation studies evaluating the efficacy, safety and tolerability of suprachoroidal delivery of RGX-314 RGX-314 for Treatment of Wet Age-Related Macular Degeneration (wet AMD) Phase 2 AAVIATE trial of suprachoroidal delivery of RGX-314 using SCS Microinjector is ongoing Patient population: severe wet AMD patients who are responsive to anti-VEGF treatment Interim efficacy data from Cohort 1 expected in Q3 2021 Interim data from Cohort 2 expected in H2 2021 Enrolling Cohort 3 in patients who are positive for neutralizing antibodies RGX-314 for Treatment of Diabetic Retinopathy (DR) Phase 2 ALTITUDE trial of suprachoroidal delivery of RGX-314 using SCS Microinjector is ongoing Initial data expected in 2021

Slide 35

Aura Bioscience: Phase 2 Ocular Oncology trial using SCS Microinjector® The Opportunity: Ocular Oncology Worldwide licensing agreement for the use of our SCS Microinjector to deliver their proprietary drug candidates into the SCS for the potential treatment of certain ocular cancers, including choroidal melanoma Non-surgical alternative to intravitreal delivery of Aura’s oncology drug candidates via our SCS Microinjector Choroidal melanoma is the most common, primary intraocular tumor in adults Aura’s Phase 2 clinical trial is ongoing using SCS Microinjector SCS delivery clinically well tolerated to date The Terms: Potential future financial upside for Clearside from pre-specified development and sales milestones Royalties on net sales of products using SCS Microinjector

Slide 36

XIPERE: Two Global Commercialization & Development Partners XIPERE™ is an investigational product License for the U.S. and Canada; options for other territories Received $5M upfront payment Up to $15M in FDA approval and pre-launch milestones Up to $57.3M in milestone payments; tiered royalties from the high-teens to 20% License for Greater China & South Korea Received $4M upfront payment $4M at U.S. approval Up to $31.5M in approval, development and sales milestones Tiered royalties of 10% to 12%

Slide 37

1 2 3 4 Maximizes the commercial and development opportunities for XIPERE in multiple geographic markets Validates our investment in suprachoroidal delivery using our SCS Microinjector Expands our overall internal and collaborative product development pipeline Eligible to receive >$230M from the four partnerships in potential development and sales milestones, and potential royalties to fund our internal R&D pipeline Four Validating Partnerships to Drive Growth

Slide 38

2021 Research and Development Investment Highlights *REGENXBIO (RGNX) trials involve suprachoroidal delivery of RGX-314 using the SCS Microinjector; Aura Biosciences trials involve suprachoroidal delivery of AU-011 using the SCS Microinjector; Arctic Vision program involves suprachoroidal delivery of ARVN001 (triamcinolone acetonide suprachoroidal injectable suspension) using the SCS Microinjector. Versatile therapeutic platform with proprietary access to the suprachoroidal space Scientific presentations and publications Q1: Angiogenesis, Macula Society Q2: ARVO Q3: ASRS, Retina Society Q4: AAO REGENXBIO: RGX-314 Q1: Initiate Cohort 2 Phase 2 AAVIATE trial in wet AMD Q3: Interim Cohort 1 Phase 2 AAVIATE trial data in wet AMD 2021: Initial Data Phase 2 ALTITUDE Trial in DR AURA BIOSCIENCES: AU-011 2021: Phase 2 trial in choroidal melanoma ongoing Patented technology & delivery approach Partnering to expand use of SCS platform* CLS-AX Phase 1/2a OASIS Q1: Complete Cohort 1 Enrollment Mid 2021: Cohort 1 Safety Data June 2021: Initiate Cohort 2 Screening YE: Cohort 2 Completion Building an internal R&D pipeline XIPERE Q2: NDA Resubmission October 2021: PDUFA Date Q4: Arctic Vision initiates Phase 3 trial in China in uveitic macular edema (ARVN001) 2021: Integrin Inhibitor preclinical data Exploratory preclinical SC non-viral vector delivery studies ongoing

Slide 39

Nasdaq: CLSD


Exhibit 99.2



Clearside Biomedical Announces Positive Safety Results from Cohort 1 of OASIS Phase 1/2a Clinical Trial of CLS-AX (axitinib injectable suspension) for the Treatment of Wet AMD

- CLS-AX 0.03 mg dose delivered via suprachoroidal injection was well-tolerated with no treatment related adverse events -

- Initiating Cohort 2 patient screening for 0.1 mg dose in June 2021-

ALPHARETTA, Ga., June 15, 2021 — Clearside Biomedical, Inc. (NASDAQ:CLSD), a biopharmaceutical company dedicated to developing and delivering treatments that restore and preserve vision for people with serious back of the eye diseases, announced today positive safety results from Cohort 1 of OASIS, its ongoing Phase 1/2a clinical trial of CLS-AX (axitinib injectable suspension) administered by suprachoroidal injection via Clearside’s SCS Microinjector® in six patients (n=6) with neovascular age-related macular degeneration (wet AMD).

The primary endpoints were achieved in Cohort 1, as the initial lowest planned dose of 0.03 mg CLS-AX was well tolerated with no serious adverse events and no drug related treatment emergent adverse events observed throughout the study period. There were no signs of inflammation, no vasculitis, no intraocular pressure (IOP) safety signals, no dispersion of drug into the vitreous, or any other drug related adverse events observed in any of the patients. The OASIS Safety Monitoring Committee has reviewed the data and the trial will advance to Cohort 2. Clearside expects to begin Cohort 2 patient screening for a dose of 0.1 mg CLS-AX in June 2021 with completion of this four month study period expected by the end of the year.

“We are very encouraged by the Cohort 1 results of the OASIS trial and we are immediately beginning Cohort 2 enrollment as planned,” said Thomas A. Ciulla, M.D., MBA, Chief Medical Officer and Chief Development Officer. “The initial data from Cohort 1 clearly achieved our safety and tolerability endpoints. While still early and recognizing there are a limited number of patients, we believe the Cohort 1 data supports our hypothesis that the combination of targeted and compartmentalized suprachoroidal delivery and the potent pan-VEGF attributes of axitinib may facilitate an effective treatment option for patients suffering from wet AMD.”

The average age of the patients in Cohort 1 was 82 years and all were anti-VEGF treatment-experienced, having undergone numerous injections of standard-of-care anti-VEGF treatments prior to entering the OASIS trial. The mean number of prior anti-VEGF treatments within the twelve months and up to the 3 years prior to the start of the trial was 9.0 injections and 22.5 injections, respectively. All enrolled patients underwent diagnostic imaging at screening, followed by masked reading center confirmation of persistent active disease. The mean central subfield thickness (CST) of the macula was 231 µm (range 208 - 294 µm). The mean baseline best corrected visual acuity (BCVA) score as measured by Early Treatment Diabetic Retinopathy Study (ETDRS) letters, at the start of the trial was 59.0 (range 29 - 74).

As part of the trial design, at the initial visit, the six treatment-experienced patients in Cohort 1 received a standard-of-care, single intravitreal injection of 2 mg aflibercept. One month later, the mean ETDRS BCVA score for all patients remained stable, changing only by -0.2 letters, and patients then received a single suprachoroidal dose of 0.03 mg CLS-AX. One month after receiving CLS-AX, five of six patients exhibited improvement in BCVA, each gaining four or more letters, with mean ETDRS BCVA score of all patients increasing by +4.7 letters (p=0.029, post hoc, unadjusted). In Cohort 1: no patients required additional treatment with aflibercept at the one-month visit post CLS-AX; two patients went three months post CLS-AX without additional treatment with aflibercept and BCVA improved by 5 and 7 ETDRS letters for these patients; and four patients received additional treatment with aflibercept at the two month visit post CLS-AX. The mean CST was stable within 50 µm for all Cohort 1 patients both at one month post 2 mg aflibercept and at one month post 0.03 mg CLS-AX.

“CLS-AX was well-tolerated and these initial results in this heavily treatment-experienced group of wet AMD patients are promising. I look forward to the continued clinical advancement of CLS-AX at the planned higher doses to further explore potential benefits in visual acuity, ocular anatomy and durability,” added Mark R. Barakat, M.D., Director of Research, Retinal Consultants of Arizona; Clinical Assistant Professor, University of Arizona College of Medicine, Phoenix.

The current OASIS trial protocol includes a CLS-AX dose of 0.1 mg for Cohort 2 and 0.3 mg for Cohort 3, which equates to 3.3x and 10.0x the Cohort 1 dose of 0.03 mg. The Company expects to add a three-month extension study to follow patients in Cohort 2 and Cohort 3. Combined data from the multiple cohorts of the OASIS trial is planned to be presented at future medical meetings.

Information on Clearside’s pipeline, including the CLS-AX program and Cohort 1 top-line results, are included in the Company’s corporate presentation which may be accessed on the Clearside website under the Investors section: Events and Presentations.

About the OASIS Phase 1/2a Clinical Trial

OASIS is an open-label, single dose-escalation Phase 1/2a trial in wet AMD patients to assess the safety and tolerability of three increasing doses of CLS-AX administered by suprachoroidal injection via Clearside’s SCS Microinjector®. Eligible patients are those who demonstrate stable visual acuity following two or more previous injections with an intravitreal anti-VEGF agent. All enrolled patients undergo diagnostic imaging on screening, followed by masked reading center confirmation of persistent active disease.

Enrolled patients initially receive aflibercept at the first visit followed by a single dose of CLS-AX at the second visit one month later. The primary endpoint for the trial will assess the safety and tolerability of CLS-AX for the three months following the administration of CLS-AX, and secondary endpoints will evaluate the pharmacokinetics, visual function, ocular anatomy, and the need for additional treatment with intravitreal aflibercept during the three-month period.

The study design is planned with 3 cohorts of approximately 5 patients each (n=15). Cohort 1 participants received the lowest dose, 0.03 mg of axitinib delivered via suprachoroidal injection, and the trial is proceeding to Cohort 2 with a dose of 0.1 mg of axitinib. Dose escalation to the next Cohort follows review of the safety data by the Safety Monitoring Committee and their recommendation to advance to the next higher dose cohort. Additional information on the Phase 1/2a trial can be found on https://clinicaltrials.gov (NCT04626128).

About CLS-AX (axitinib injectable suspension)

Axitinib is a tyrosine kinase inhibitor (TKI) currently approved to treat renal cell cancer that achieves pan-VEGF blockade, directly inhibiting VEGF receptors-1, -2, and -3 with high potency and specificity. Clearside believes this broad VEGF blockade may have efficacy advantages over existing retinal therapies by acting at a different level of the angiogenesis cascade and may benefit patients who sub-optimally respond to current, more narrowly focused anti-VEGF therapies. Preclinical studies by independent investigators have shown pharmacodynamic effects with reduced growth of experimental neovascularization and decreased fluorescein leakage.

CLS-AX (axitinib injectable suspension) is a proprietary suspension of axitinib for suprachoroidal injection. With suprachoroidal administration of axitinib, there is targeted delivery of this pan-VEGF inhibitor to affected tissue layers for potential efficacy benefits, as well as prolonged chorioretinal tissue levels for potential durability benefits. Suprachoroidal injection of this proprietary suspension of axitinib has demonstrated meaningful potential in preclinical studies in multiple species.

About Clearside’s Suprachoroidal Space (SCS®) Injection Platform and SCS Microinjector®

Clearside’s patented, proprietary suprachoroidal space (SCS®) injection treatment approach offers unprecedented access to the back of the eye where sight-threatening disease often occurs. The company’s unique platform is inherently flexible and intended to work with established and new formulations of medications. Clearside’s proprietary SCS Microinjector® can be used to inject a wide variety of drug candidates that are specifically formulated to be delivered via suprachoroidal injection. The SCS Microinjector provides targeted delivery to potentially improve efficacy and compartmentalization of medication to reduce or eliminate toxic effects on non-diseased cells. The SCS Microinjector is composed of a syringe and two 30-gauge hollow microneedles of varying lengths, each less than 1.2 millimeters, within a custom-designed hub that optimizes insertion and suprachoroidal administration of drugs.

About Clearside Biomedical

Clearside Biomedical, Inc. is a biopharmaceutical company dedicated to developing and delivering treatments that restore and preserve vision for people with serious back of the eye diseases. Clearside’s proprietary SCS Microinjector® targets the suprachoroidal space (SCS®) and offers unique access to the macula, retina and choroid where sight-threatening disease often occurs. The Company’s SCS injection platform is an inherently flexible, in-office, non-surgical procedure, intended to provide targeted delivery to the site of disease and to work with both established and new formulations of medications. For more information, please visit www.clearsidebio.com.

Cautionary Note Regarding Forward-Looking Statements

Any statements contained in this press release that do not describe historical facts may constitute forward-looking statements as that term is defined in the Private Securities Litigation Reform Act of 1995. These statements may be identified by words such as “believe”, “expect”, “may”, “plan”, “potential”, “will”, and similar expressions, and are based on Clearside’s current beliefs and expectations. These forward-looking statements include statements regarding the clinical development, including the timing of initiation of Cohort 2 patient screening for the OASIS clinical trial, and the potential benefits of CLS-AX and therapies using Clearside’s SCS Microinjector®. These statements involve risks and uncertainties that could cause actual results to differ materially from those reflected in such statements. Risks and uncertainties that may cause actual results to differ materially include uncertainties inherent in the conduct of clinical trials, Clearside’s reliance on third parties over which it may not always have full control, uncertainties

regarding the COVID-19 pandemic and other risks and uncertainties that are described in Clearside’s Annual Report on Form 10-K for the year ended December 31, 2020, filed with the U.S. Securities and Exchange Commission (SEC) on March 15, 2021, and Clearside’s other Periodic Reports filed with the SEC. Any forward-looking statements speak only as of the date of this press release and are based on information available to Clearside as of the date of this release, and Clearside assumes no obligation to, and does not intend to, update any forward-looking statements, whether as a result of new information, future events or otherwise.

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Source: Clearside Biomedical, Inc.