Glaukos
Develops implantable glaucoma therapies and corneal cross-linking treatments.
$179.87
After-hours close−0.01 (−0.01%)
At close$179.88(−1.12%)
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Breakdown13F · Form 4
Institutions 119.37%Insiders 2.88%
A 13F quarter can total more than the shares outstanding — sub-advisers file the same block twice, and a filer's own share count can be a quarter stale. No split is drawn from it.
Shares outstanding 58.98M · Float 56.62M · 96.0% free float
Institutions13F, as of Jun 30, 2026
378 holders · 70.41M shares · 69 new positions · 218 increased · 103 reduced · 43 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 9.54M | 16.17% | +450.0K | Aug 7, 2026 |
| Jupiter Topco LLC | 4.86M | 8.24% | +4.86Mnew | Aug 14, 2026 |
| Vanguard Portfolio Management LLC | 3.32M | 5.63% | +113.5K | Aug 13, 2026 |
| Primecap Management Co/CA/ | 3.04M | 5.16% | −329.9K | Aug 14, 2026 |
| Vanguard Capital Management LLC | 2.55M | 4.33% | +42.4K | Aug 13, 2026 |
| State Street Corp | 2.32M | 3.93% | +133.0K | Aug 7, 2026 |
| Millennium Management LLC | 1.58M | 2.68% | +407.3K | Aug 14, 2026 |
| Holocene Advisors, LP | 1.51M | 2.57% | +131.2K | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 14.40% | 8.16M | 13G | Apr 29, 2025 ↗ |
| Janus Henderson Group PLC | 9.20% | 5.35M | 13G | May 15, 2026 ↗ |
| Primecap Management Co/CA/ | 5.88% | 3.38M | 13G | Feb 11, 2026 ↗ |
| Vanguard Portfolio Management | 5.60% | 3.26M | 13G | Apr 29, 2026 ↗ |
| Vanguard Capital Management | 5.07% | 2.95M | 13G | Apr 29, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Thomas William Burns | director, officer: CHAIRMAN & CEO | 1.21M | 2.05% | Jun 29, 2026 |
| Tomas Navratil | officer: CHIEF DEVELOPMENT OFFICER | 87.6K | 0.15% | Jul 8, 2026 |
| Joseph E. Gilliam | officer: PRESIDENT & COO | 72.6K | 0.12% | Aug 13, 2026 |
| Mark J. Foley | director | 60.3K | 0.10% | Jun 1, 2026 |
| Aimee S. Weisner | director | 50.2K | 0.09% | Jun 1, 2026 |
| David F. Hoffmeister | director | 49.5K | 0.08% | Jun 1, 2026 |
| Alex R. Thurman | officer: SVP & CHIEF FINANCIAL OFFICER | 43.9K | 0.07% | Aug 11, 2026 |
| Marc Stapley | director | 39.3K | 0.07% | Jun 1, 2026 |
| Gilbert H. Kliman | director | 37.4K | 0.06% | Aug 20, 2026 |
| Denice Torres | director | 24.2K | 0.04% | Jun 1, 2026 |
11 ten-percent owners hold 11.49M shares by Form 4, outside the officers-and-directors figure above · 5 people have not refiled in the last 18 months (611.4K shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 19, 2026 | Gilbert H. Klimandirector | Sale | 2,500 | $190.00 | 37,406 |
| Aug 11, 2026 | Joseph E. Gilliamofficer: PRESIDENT & COO | Sale · 2 lots | 60,000 | $179.74 | 72,588 |
| Aug 7, 2026 | Alex R. Thurmanofficer: SVP & CHIEF FINANCIAL OFFICER | Sale | 20,000 | $180.13 | 43,906 |
| Jul 31, 2026 | Leana Wendirector | Sale | 525 | $167.63 | 21,092 |
| Jul 16, 2026 | Alex R. Thurmanofficer: SVP & CHIEF FINANCIAL OFFICER | Sale | 10,000 | $160.00 | 43,906 |
| Jul 9, 2026 | Alex R. Thurmanofficer: SVP & CHIEF FINANCIAL OFFICER | Sale | 10,000 | $155.00 | 43,681 |
| Jul 1, 2026 | Tomas Navratilofficer: CHIEF DEVELOPMENT OFFICER | Sale | 716 | $139.06 | 87,634 |
| Jul 6, 2026 | Alex R. Thurmanofficer: SVP & CHIEF FINANCIAL OFFICER | Sale | 10,000 | $150.00 | 43,681 |
| Jun 16, 2026 | Tomas Navratilofficer: CHIEF DEVELOPMENT OFFICER | Sale | 1,537 | $130.68 | 88,833 |
| May 14, 2026 | Gilbert H. Klimandirector | Sale | 5,000 | $140.76 | 35,528 |
CongressHouse and Senate disclosures
Not reported.