Altus Investment Advisory increases Duoback stake to 12.83% through open market purchases for simple investment purpose


  • Altus Investment Advisory and its specially related parties increased their stake in Duoback from 11.37% to 12.83% through open market purchases from May 20 to June 17, 2026, a net increase of 1.46 percentage points.
  • The purpose of holding is stated as simple investment with no intention to influence management, and the reporting entity is a professional investor filing under the simplified reporting regime.
  • The stake comprises 3.67% proprietary and 9.16% client accounts, acquired through market transactions without any issuance of new shares or convertible instruments that would dilute existing shareholders.
  • Given the current market price of 1,252 KRW and market cap of approximately 149.8 billion KRW, the 1.46% increase is a minor change with no direct impact on financial structure or dividend policy.
  • [AI Summary]This open market purchase for simple investment purposes does not involve capital raising or management change, remaining neutral for shareholder value. The slight stake increase may provide short-term momentum but is not a key investment factor.

KOSDAQ Filing Information


  • Report on Large Shareholding (Short Form)
  • Company: DUOBACK (073190)
  • Submission: Altus Investment Advisory

  • Shares: 11,968,040
  • Price: 1,252 KRW
  • Market Cap: 15 B KRW