PremiumCompany AnnouncementsHOYA CORPORATION Announces Treasury Stock Cancellation to Boost Capital Efficiency HOYA Corporation Concludes Share Repurchase Plan Hoya Corp. downgraded to Hold from Buy at Erste Group PremiumCompany AnnouncementsHOYA Corporation Concludes Share Repurchase Plan HOYA Completes Part of Share Repurchase Plan HOYA Corporation Reports Strong Revenue Growth PremiumCompany AnnouncementsHOYA Corporation Completes Treasury Stock Disposal HOYA CORPORATION Concludes Stock Buyback Plan HOYA Announces Executive Incentive Stock Disposal