GLAUKOS Corp (GKOS) Institutional Ownership

Ownership Summary

GLAUKOS Corp (NYSE:GKOS) is held by 321 institutional investors per 13F filings through December 2025.

• They owned 99.0% of outstanding stock in December 2025, down from 100.2% the prior quarter.
• They increased total shares held in Glaukos by 6.93% from the prior quarter, while the number of investors in GKOS increased 0.63% year over year.
• Of these 321 holders, 190 added to their stakes in Glaukos, 102 trimmed positions, and 29 made no changes.
• In total, institutional investors held 56.83Mn shares in Glaukos as of December 2025, up by 3.68Mn shares quarter on quarter, and down 2.34Mn shares year over year.
• Janus Henderson Group Plc holds the largest position in GKOS at 10.7Mn shares as of December 31, 2025, or 18.64% of shares outstanding.
• The largest buyers of Glaukos for the quarter ending December 2025 were Janus Henderson Group Plc (7.68Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (3.21Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.51Mn), CITADEL ADVISORS LLC (1.42Mn), DRIEHAUS CAPITAL MANAGEMENT LLC (487.91K).
• Leading sellers of Glaukos shares for the quarter ending December 2025 were Goldman Sachs Group Inc (1.33Mn), Ameriprise Financial Inc (493.52K), UBS Group AG (487.54K), MILLENNIUM MANAGEMENT LLC (436.0K), WELLINGTON MANAGEMENT GROUP LLP (337.67K).
• Business Quant data shows the 10 biggest positions in Glaukos as of December 2025 are held by Janus Henderson Group Plc (10.7Mn), BlackRock, Inc. (9.09Mn), PRIMECAP MANAGEMENT CO/CA/ (3.37Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (3.21Mn), VANGUARD CAPITAL MANAGEMENT LLC (2.51Mn), State Street Corp (2.18Mn), Ameriprise Financial Inc (1.61Mn), CITADEL ADVISORS LLC (1.45Mn), ALLIANCEBERNSTEIN L.P. (1.4Mn), Holocene Advisors, LP (1.38Mn).