Glaukos GKOS Insider Ownership

Updated Nov 4, 2026

Over the past 12 months, Glaukos insiders sold $79.93 million of stock on the open market (571.77K shares) and made no open-market purchases.

• By number of insiders, Glaukos saw 8 insiders sell on the open market over the past 12 months and none buy.
• Thomas William Burns (Chairman & CEO) was GKOS's largest open-market seller in the past 12 months, with $31.62 million of sales (275K shares); the latest was on January 16, 2026.
• The latest open-market trade in GKOS stock by an insider was a sale of 44.44K shares for $10.62 million by Tomas Navratil (Chief Development Officer) on October 30, 2026.
• Away from the open market, GKOS insiders received 94.64K shares in stock awards, acquired 651.47K shares through option exercises and conversions, gave up 78.24K shares to cover taxes or exercise prices and gave away 251.02K shares as gifts over the last 12 months.
• Business Quant data puts insider holdings in GKOS at 1.84Mn shares across insiders' latest Form 4 filings, or 3.11% of the 59.2Mn shares outstanding; that total is down 2.82% from 1.9Mn shares at the end of Q2 2026 and up 7.33% from 1.72Mn shares at the end of Q3 2025.
• Glaukos insiders hold 470.44K shares directly (25.51% of their total) and 1.37Mn shares (74.49%) indirectly, through entities such as trusts and partnerships.
• Per Business Quant, 11 insiders of GKOS hold shares, counting officers, directors and 10% owners who have filed a Form 4 in the past two years.
• GKOS's largest insider holders by reported holdings are Thomas William Burns (Chairman & CEO, 1.41Mn shares), Joseph E. Gilliam (President & COO, 72.59K shares) and Mark J. Foley (Director, 60.27K shares).
• The holding of Thomas William Burns makes up 76.50% of all shares held by Glaukos insiders.
• In the past year, 11 insiders of Glaukos submitted 86 Form 4 filings reporting trades, awards or other transactions.
• This summary of Glaukos insider activity covers Form 4 filings through November 3, 2026.