Glaukos
GKOS
172.18
+10.59
+6.55%
Glaukos
US · GKOS
#1500 by market cap
Listed 2015
172.18
+10.59
+6.55%
Live - 5344 symbols - heartbeat 398s ago
· 2026-10-08 08:25
Pre-market
172.44
+0.15%
After-hours
172.18
0.00%
Overnight
170.79
-0.81%
- Market cap
- 10.16B
- P/E (TTM)i
- -52.65
- P/Bi
- 14.88
- EPSi
- -3.28
- Div yieldi
- 0.00%
- 52W posi
- 84%
Reader sentiment
Are you bullish or bearish on GKOS?
Anonymous reader poll. Unscientific, not investment advice.
✦ Quant Ownership Signal how this is computed
Distributing
- The number of reporting institutions increased by 1 in the most recent period (2026/Q3).
- Total institutional ownership fell 0.5 percentage points.
Institutional ownership
- Held by institutions
- 104.08% -0.54pp
- Institutions
- 437 +1
- As of
- 2026/Q3 vs. prior period
Ownership vs. money flow
AlignedInstitutions trimmed shares last reporting period, and the stock has seen net outflows in main-fund flow over the last 20 trading sessions - the two line up.
Institutional ownership changes are reported quarterly with a lag; fund-flow data is daily. Treat this as a directional cross-check, not a precise timing signal.
Holder types
Mutual Fund84.30%
Hedge Fund12.95%
Individual/Insider3.57%
Public Company3.40%
Government Pension Fund1.45%
Sovereign Wealth Fund0.85%
Private Company0.69%
Insurance Company0.32%
Top holders as of 2026-06-30
BlackRock
16.18% · 9.54M sh
Janus Henderson Group plc
8.25% · 4.86M sh
Vanguard Portfolio Management, LLC
5.63% · 3.32M sh
PRIMECAP Management Company
5.16% · 3.04M sh
Vanguard Capital Management, LLC
5.04% · 2.97M sh
State Street Global Advisors
3.93% · 2.32M sh
Thomas Burns
2.90% · 1.71M sh
Millennium Management LLC
2.68% · 1.58M sh
Holocene Advisors, LP
2.57% · 1.51M sh
Geode Capital Management, LLC
2.48% · 1.46M sh
Bar length is relative to the largest holder shown here, not to 100% of the company.
Insiders
50 filings tracked · 21 buys · 29 sells
| Name | Role | Stake |
|---|---|---|
| Thomas Burns | Chairperson & CEO | 2.90% |
| David Hoffmeister | Independent Director | 0.14% |
| Mark Foley | Lead Independent Director | 0.09% |
| Aimee Weisner | Independent Director | 0.08% |
| Alex Thurman | Senior Vice President | 0.07% |
| Gilbert Kliman | Independent Director | 0.06% |
| Marc Stapley | Independent Director | 0.06% |
| Tomas Navratil | Chief Development Officer | 0.05% |
| Joseph Gilliam | President | 0.05% |
| Denice Torres | Independent Director | 0.03% |
Insider transactions most recent Form 4 filings
| Date | Name | Role | Type | Shares | Price |
|---|---|---|---|---|---|
| 2026-10-04 | Tomas Navratil | Chief Development Officer | Intent to Sell (Form 144) | -1,527 | $164.45 |
| 2026-09-24 | Tomas Navratil | Chief Development Officer | Automatic Disposition | -1,615 | $151.70–154.88 |
| 2026-09-15 | Tomas Navratil | Chief Development Officer | Automatic Disposition | -1,457 | $163.20–172.00 |
| 2026-08-27 | Tomas Navratil | Chief Development Officer | Private Disposition | -10 | $182.50 |
| 2026-08-27 | Tomas Navratil | Chief Development Officer | Open Market Disposition | -13,734 | $180.25–181.19 |
| 2026-08-18 | Gilbert Kliman | Independent Director | Derivative Exercise and Sale | -2,500 | $25.77–190.00 |
| 2026-08-10 | Joseph Gilliam | President | Derivative Exercise and Sale | -60,000 | $48.46–180.49 |
| 2026-08-06 | Alex Thurman | Senior Vice President | Derivative Exercise and Sale | -20,000 | $33.81–180.13 |
| 2026-07-30 | Leana Wen | Independent Director | Open Market Disposition | -525 | $167.63 |
| 2026-07-15 | Alex Thurman | Senior Vice President | Derivative Exercise and Sale | -10,000 | $38.68–160.00 |
| 2026-07-08 | Alex Thurman | Senior Vice President | Derivative Exercise and Sale | -10,000 | $38.68–155.00 |
| 2026-07-05 | Alex Thurman | Senior Vice President | Derivative Exercise and Sale | -10,000 | $38.68–150.00 |
| 2026-06-30 | Tomas Navratil | Chief Development Officer | Automatic Disposition | -716 | $139.06 |
| 2026-06-24 | Thomas Burns | Chairperson & CEO | Sale to Issuer | -4,059 | $142.57 |
| 2026-06-24 | Joseph Gilliam | President | Sale to Issuer | -1,056 | $142.57 |
| 2026-06-24 | Tomas Navratil | Chief Development Officer | Sale to Issuer | -483 | $142.57 |
| 2026-06-15 | Tomas Navratil | Chief Development Officer | Automatic Disposition | -1,537 | $130.68 |
| 2026-05-27 | Gilbert Kliman | Independent Director | Other Acquisition | +1,878 | -- |
| 2026-05-27 | Gilbert Kliman | Independent Director | Other Derivative Acquisition | +2,987 | $106.52 |
| 2026-05-27 | Aimee Weisner | Independent Director | Other Acquisition | +1,878 | -- |
Form 4 filings, most recent per company. "Other Derivative Acquisition" rows are mostly RSU/option vesting, not open-market buying - the Type column says which.
Quote time 2026-10-08 08:25:48 · For reference only, not investment advice and not tailored to your situation.