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Occurring Fact4576D.Western Therapeutics Institute, Inc.Pharmaceuticals

Notice of Completion of the Observation Period for All Subjects in the Global Phase III Clinical Trials of K-321 for the Treatment of Fuchs Endothelial Corneal Dystrophy

In the global Phase III clinical trials of K-321, the observation period for all subjects in the one remaining trial has been completed, bringing the observation periods for both trials to a close. The company will now proceed with data compilation and analysis.

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Completion of the Observation Period for All Subjects in the Global Phase III Clinical Trials of K-321 for the Treatment of Fuchs Endothelial Corneal Dystrophy

Subject Entity

Kowa Company, Ltd. (licensee)

Target Locations / Products

Multiple countries and regions, including the United States and Europe; K-321 for the treatment of Fuchs endothelial corneal dystrophy

This disclosure03/19/2026
Impact on Earnings Forecast

There is no change to the earnings forecasts for the fiscal year ending December 2026.

Related procedures

Type

Global Phase III clinical trials

Outlook

The subjects' data will be collected and compiled and analyzed going forward. The results will be disclosed promptly once they become available. The application for manufacturing and marketing approval is expected to be filed in 2027.

Event that occurred
ItemDetails
Event nameCompletion of the Observation Period for All Subjects in the Global Phase III Clinical Trials of K-321 for the Treatment of Fuchs Endothelial Corneal Dystrophy
Subject EntityKowa Company, Ltd. (licensee)
Target Locations / ProductsMultiple countries and regions, including the United States and Europe; K-321 for the treatment of Fuchs endothelial corneal dystrophy
Impact on Earnings ForecastThere is no change to the earnings forecasts for the fiscal year ending December 2026.
Type of litigation or proceedingGlobal Phase III clinical trials
OutlookThe subjects' data will be collected and compiled and analyzed going forward. The results will be disclosed promptly once they become available. The application for manufacturing and marketing approval is expected to be filed in 2027.
Planned follow-up disclosureThe results will be disclosed promptly once they become available.
Items this document does not state (18)
Date of occurrenceDate recognized / date notice receivedCauseAmount of Impact on Business PerformanceAccounting period in which recognizedCourt or authorityPlaintiffDefendantDate of filing / date of actionClaim amount / surcharge amountAmount of receivables at risk of non-collection or delayed collectionSuspended operationsScheduled resumption dateInvestigation structureMeasures to prevent recurrenceDirectors' and officers' liabilityVoting rights ownership percentage before the changeVoting rights ownership percentage after the change

These are items the company does not state in this document. We do not leave them blank, nor fill them in from other sources or by inference.

The reasons the company gives

The company's own explanation, not something inferred from the numbers.

The company was notified by Kowa Company, Ltd., the licensee, that the observation period for the subjects in the remaining trial had been completed.

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Notice of Completion of the Observation Period for All Subjects in the Global Phase III Clinical Trials of K-321 for the Treatment of Fuchs Endothelial Corneal Dystrophy | D.Western Therapeutics Institute, Inc. (4576) timely disclosure | Komori