Glaukos (GKOS)
Develops implantable glaucoma therapies and corneal cross-linking treatments.
$154.44
vs last close−5.42 (−3.39%)
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13F · 13D/G · Form 4
| Institutions | ≈ 103.43% | 61.01M shares | |
|---|---|---|---|
| 379 holders · as of Jun 30, 2026 · largest filers plus last quarter's tail | |||
| Insiders | 2.90% | 1.71M shares | |
| 11 holders · as of Sep 18, 2026 | |||
| Strategic holders | 9.07% | 5.35M shares | |
| 1 holder · as of May 15, 2026 | |||
| Adds to | 115.40% | ||
58.98M company shares as of Sep 23, 2026 · institutions as of Jun 30, 2026 · holders as of their latest filing
This quarter's institutional total failed a plausibility check; shown: the largest filers plus last quarter's remainder.
These groups come from separate filings that can overlap, so they add to 115.40%; nothing is left for Other.
13F, as of Jun 30, 2026
379 holders · 61.01M shares · 69 new positions · 218 increased · 105 reduced · 42 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 |
13D/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 |
Form 4
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Sep 16, 2026 | Tomas Navratilofficer: CHIEF DEVELOPMENT OFFICER | Sale · 7 lots | 1,457 | $166.92 | 72,433 |
| Aug 28, 2026 | Tomas Navratilofficer: CHIEF DEVELOPMENT OFFICER | Sale · 3 lots | 13,744 | $180.67 | 73,890 |
| 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 |
House and Senate disclosures
Not reported.