Glaukos Corporation (GKOS) Insider Trading
Over the last 3 months, GKOS insiders made 0 open-market buys and 10 sales, a net sale of -$6.3M (SEC Form 4). Over the last 6 months, 251 institutions increased and 236 reduced their position (13F).
Insider Activity
Sentiment
0/100
Buys (3m)
0
Sells (3m)
10
Net (3m)
-$6.3M
Insider trades by month Buys Sells
Jan
Feb
Mar
Apr
May
Jun
Context3-month price +29.8%Institutions mixed (13F)
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| Jun 29, 2026 | Navratil Tomasofficer: CHIEF DEVELOPMENT OFFICER | Tax | 483 | $142.57 |
| Jun 29, 2026 | Burns Thomas Williamdirector, officer: CHAIRMAN & CEO | Tax | 4,059 | $142.57 |
| Jun 29, 2026 | Gilliam Joseph Eofficer: PRESIDENT & COO | Tax | 1,056 | $142.57 |
| Jun 23, 2026 | WEISNER AIMEE Sdirector | Grant | 2,987 | $106.52 |
| Jun 23, 2026 | Hoffmeister David Fdirector | Grant | 2,987 | $106.52 |
| Jun 23, 2026 | Torres Denicedirector | Grant | 2,987 | $106.52 |
| Jun 23, 2026 | Stapley Marcdirector | Grant | 2,987 | $106.52 |
| Jun 23, 2026 | Kliman Gilbert Hdirector | Grant | 2,987 | $106.52 |
| Jun 23, 2026 | WEN LEANAdirector | Grant | 2,987 | $106.52 |
| Jun 23, 2026 | Foley Mark Jdirector | Grant | 2,987 | $106.52 |
| Jun 18, 2026 | Navratil Tomasofficer: CHIEF DEVELOPMENT OFFICER | Sell | 1,537 | $130.68 |
| Jun 1, 2026 | Hoffmeister David Fdirector | Grant | 1,878 | — |
| Jun 1, 2026 | Stapley Marcdirector | Grant | 1,878 | — |
| Jun 1, 2026 | Foley Mark Jdirector | Grant | 2,987 | $53.57 |
| Jun 1, 2026 | Kliman Gilbert Hdirector | Grant | 2,987 | $53.57 |
| Jun 1, 2026 | Hoffmeister David Fdirector | Grant | 2,987 | $53.57 |
| Jun 1, 2026 | WEN LEANAdirector | Grant | 2,987 | $53.57 |
| Jun 1, 2026 | WEN LEANAdirector | Grant | 1,878 | — |
| Jun 1, 2026 | Stapley Marcdirector | Grant | 2,987 | $53.57 |
| Jun 1, 2026 | Foley Mark Jdirector | Grant | 1,878 | — |
| Jun 1, 2026 | WEISNER AIMEE Sdirector | Grant | 2,987 | $53.57 |
| Jun 1, 2026 | Torres Denicedirector | Grant | 2,987 | $53.57 |
| Jun 1, 2026 | WEISNER AIMEE Sdirector | Grant | 1,878 | — |
| Jun 1, 2026 | Kliman Gilbert Hdirector | Grant | 1,878 | — |
| Jun 1, 2026 | Torres Denicedirector | Grant | 1,878 | — |
| May 28, 2026 | Hoffmeister David Fdirector | Option | 15,000 | $24.69 |
| May 18, 2026 | Kliman Gilbert Hdirector | Sell | 5,000 | $140.76 |
| May 18, 2026 | Kliman Gilbert Hdirector | Option | 5,000 | $24.69 |
| May 13, 2026 | Kliman Gilbert Hdirector | Option | 5,000 | $24.69 |
| May 13, 2026 | Kliman Gilbert Hdirector | Sell | 5,000 | $135.00 |
Source: GKOS SEC Form 4 filings, latest Jun 29, 2026. For informational purposes only — not investment advice.
Institutional activity (13F)
How institutions changed their GKOS positions over the last 6 months (SEC Form 13F).
Increased
251
New positions
113
Reduced
236
Sold out
93
Largest moves
| Institution | Action | Shares | Filed |
|---|---|---|---|
| JANUS HENDERSON GROUP PLC | Increased | 10.7M | May 18, 2026 |
| BLACKROCK, INC. | Increased | 9.2M | Feb 12, 2026 |
| BLACKROCK, INC. | Reduced | 9.1M | May 13, 2026 |
| VANGUARD GROUP INC | Reduced | 6.0M | Jan 29, 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC | New Position | 5.0M | May 15, 2026 |
| PRIMECAP MANAGEMENT CO/CA/ | Increased | 3.4M | Feb 11, 2026 |
| PRIMECAP MANAGEMENT CO/CA/ | Reduced | 3.4M | May 11, 2026 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | New Position | 3.2M | May 8, 2026 |
| JANUS HENDERSON GROUP PLC | Increased | 3.0M | Feb 17, 2026 |
| STATE STREET CORP | Increased | 2.2M | May 15, 2026 |
| STATE STREET CORP | Increased | 2.1M | Feb 13, 2026 |
| AMERIPRISE FINANCIAL INC | Increased | 2.1M | Feb 17, 2026 |
| ALLIANCEBERNSTEIN L.P. | Reduced | 1.6M | Feb 17, 2026 |
| AMERIPRISE FINANCIAL INC | Reduced | 1.6M | May 15, 2026 |
| MILLENNIUM MANAGEMENT LLC | Increased | 1.6M | Feb 17, 2026 |
Source: SEC Form 13F filings. For informational purposes only — not investment advice.