GLAUKOS Corp (GKOS) Insider Ownership

Historic Insider Ownership Trends

Glaukos's top three insider shareholders as of April 22, 2026 are Thomas William Burns (Chairman Ceo, 1.21Mn shares), Chris M. Calcaterra (Chief Operating Officer, 181.59K shares), Joseph E Gilliam (President Coo, 92.99K shares).

Top Direct Holders

Insider ownership data is derived from the last 60 months of Form 4 SEC filings.
Holder Position Shares (Direct) Shares (Indirect) Report Date
Thomas William Burns Chairman Ceo 73,026 1,141,593 03 Apr, 2026
Chris M. Calcaterra Chief Operating Officer 181,594 0 28 Mar, 2022
Joseph E Gilliam President Coo 92,992 0 03 Apr, 2026
Joseph E Gilliam President Coo 92,992 0 03 Apr, 2026
Tomas Navratil Chief Development Officer 90,370 0 14 Apr, 2026
Mark J Foley - 58,389 0 07 Jan, 2026
Aimee S Weisner - 18,806 29,505 23 Feb, 2026
Aimee S Weisner - 18,806 29,505 23 Feb, 2026
Alex R. Thurman Svp Chief Financial Officer 43,681 0 03 Apr, 2026
Alex R. Thurman Svp Chief Financial Officer 43,681 0 03 Apr, 2026
Marc Stapley - 37,449 0 26 Jan, 2026
Gilbert H Kliman - 35,528 0 07 Jan, 2026
David F Hoffmeister - 32,671 0 07 Jan, 2026
Denice Torres - 22,334 0 07 Jan, 2026
Leana Wen - 21,439 0 07 Jan, 2026
Leana Wen - 21,439 0 07 Jan, 2026
Gilbert H Kliman - 0 13,965 18 May, 2022

* Please note that the shares above only reflect shares from the fund portfolio and the institutional portfolio. Shares from the personal portfolio are excluded from this Institutional Ownership Page. See these insiders' latest transactions here on Insider Page.

Recent Insider Transactions

Detailed insider trading activity based on Form 4 SEC filings.
Download Data
Transaction Date Insider Name Security Class Transaction Type Shares Traded Price Shares Remaining Ownership Code
10 Apr, 2026 Tomas Navratil Common Stock D 1,237 $116.72 91,226 D S
10 Apr, 2026 Tomas Navratil Common Stock D 210 $117.45 91,016 D S
10 Apr, 2026 Tomas Navratil Common Stock D 614 $119.35 90,402 D S
10 Apr, 2026 Tomas Navratil Common Stock D 32 $120.23 90,370 D S
02 Apr, 2026 Tomas Navratil Common Stock D 1,146 $109.60 94,294 D F
02 Apr, 2026 Alex R. Thurman Common Stock D 1,589 $109.60 43,681 D F
02 Apr, 2026 Joseph E Gilliam Common Stock D 3,169 $109.60 92,992 D F
01 Apr, 2026 Thomas William Burns Common Stock D 180,308 $0.00 82,963 D G
01 Apr, 2026 Thomas William Burns Common Stock A 180,308 $0.00 1,141,593 I G
02 Apr, 2026 Tomas Navratil Common Stock D 1,831 $109.60 92,463 D F
02 Apr, 2026 Thomas William Burns Common Stock D 2,469 $109.60 80,494 D F
02 Apr, 2026 Thomas William Burns Common Stock D 7,468 $109.60 73,026 D F
31 Mar, 2026 Tomas Navratil Common Stock D 5,798 $109.60 95,440 D F
25 Mar, 2026 Joseph E Gilliam Common Stock A 5,829 $0.00 78,369 D A
25 Mar, 2026 Thomas William Burns Common Stock A 9,380 $0.00 249,087 D A
25 Mar, 2026 Alex R. Thurman Common Stock D 2,511 $106.46 41,967 D S
25 Mar, 2026 Tomas Navratil Common Stock A 4,622 $0.00 73,079 D A
25 Mar, 2026 Tomas Navratil Common Stock A 11,693 $0.00 84,772 D A
25 Mar, 2026 Alex R. Thurman Common Stock A 3,303 $0.00 45,270 D A
25 Mar, 2026 Thomas William Burns Common Stock A 14,184 $0.00 263,271 D A