Latest Period
Q1 2026
Security Snapshot
GLAUKOS Corp - Common Stock (GKOS) Institutional Ownership
CUSIP: 377322102
13F Institutional Holders and Ownership History from Q2 2015 to Q1 2026
Institutions Reporting
335
Shares (Excl. Options)
57,984,500
Price
$107.66
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- Security type / class
- Equity / Common Stock
- Symbol
- GKOS on NYSE
- All holders as of 31 Mar 2026
- Q1 2026
- Total 13F shares
- 57,984,500
- Total 13F value
- $6,250,629,458
- Portfolio coverage rank
- 0%
- Share change
- +720,685
- Value change
- +$69,506,672
- Number of holders
- 335
- Shares outstanding
- 58,134,728
- SEC-reported price per share
- $120.23
- Insider filing price
- $120.23
Latest holder snapshot
5 signals
Issuer context
Names, identifiers, and filing context for this profile.
3 identity fields
13F Shares, Excluding Options vs Price
13F Value, Excluding Options
Total Investors
Key facts
- GKOS - GLAUKOS Corp - Common Stock is tracked under CUSIP 377322102.
- 335 institutions reported positions in Q1 2026.
- 8 significant owners is listed from Schedule 13D/13G reporting.
Change
- Holder count moved from 331 to 335 between Q4 2025 and Q1 2026.
- SEC-reported value moved from $6,443,592,197 to $6,250,629,458.
Research use
- You can quickly see who holds this security, then open quarter and manager detail pages for full evidence.
- 13F and Schedule 13D/13G sections are kept together so you can cross-check institutional and beneficial ownership context.
Evidence
Source: SEC Form 13F
Open SEC evidence
Latest holder context comes from 335 institutions filings for Q1 2026.
Security key
377322102
Latest holder period
Q1 2026
13F holders
335
13D/G owners
8
CIK / CUSIP context first
Open Q1 2026 holders
GKOS full holder history
GLAUKOS Corp SEC filings
GLAUKOS Corp company facts
GLAUKOS Corp insider transactions
Broader feeds
Recent Quarterly Holder Reports
Open recent reporting periods for CUSIP 377322102:
13D/G owners
Significant owners
Large-stake holder rows connected to Schedule 13D/G evidence.
Rows
8
Security
GKOS
| Filer | Ownership | Change % | Holdings Value | Net Change | Nb Shares | Change % | Reporting Name | Report Period |
|---|---|---|---|---|---|---|---|---|
| BlackRock, Inc. | 14% | $765,685,922 | 8,160,353 | BlackRock, Inc. | 31 Mar 2025 | |||
| JANUS HENDERSON GROUP PLC | 9.2% | +78% | $622,553,178 | +$271,166,371 | 5,348,395 | +77% | JANUS HENDERSON GROUP PLC | 31 Mar 2026 |
| PRIMECAP MANAGEMENT CO/CA/ | 5.9% | $381,288,940 | 3,376,928 | PRIMECAP MANAGEMENT CO/CA/ | 31 Dec 2025 | |||
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.6% | $350,644,529 | 3,256,962 | Vanguard Portfolio Management | 31 Mar 2026 | |||
| VANGUARD CAPITAL MANAGEMENT LLC | 5.1% | $317,279,080 | 2,947,047 | Vanguard Capital Management | 31 Mar 2026 | |||
| FMR LLC | 4.5% | -59% | $262,367,116 | -$360,259,421 | 2,561,428 | -58% | FMR LLC | 31 Jul 2025 |
| Burns Thomas William | 4.4% | $239,613,202 | 2,553,695 | Thomas W. Burns | 31 Dec 2024 | |||
| WELLINGTON MANAGEMENT GROUP LLP | 0.8% | -82% | $54,967,298 | -$311,358,358 | 486,824 | -85% | Wellington Management Group LLP | 31 Dec 2025 |
As of 31 Mar 2026, 335 institutional investors reported holding 57,984,500 shares of GLAUKOS Corp - Common Stock (GKOS). This represents 100% of the company’s total 58,134,728 outstanding shares.
13F concentration
Top 25 institutional shareholders
Largest 13F positions for this security by reported shares and value.
Top holder share
76%
| Institution | Ownership % | Shares Held | Share Change % | Portfolio % | Holdings Value |
|---|---|---|---|---|---|
| BlackRock, Inc. | 16% | 9,090,029 | -0.81% | 0.02% | $978,632,521 |
| JANUS HENDERSON GROUP PLC | 9.2% | 5,348,395 | +77% | 0.27% | $575,844,474 |
| PRIMECAP MANAGEMENT CO/CA/ | 5.8% | 3,370,628 | -0.19% | 0.29% | $362,881,812 |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 5.5% | 3,208,363 | 0% | 0.02% | $345,412,361 |
| VANGUARD CAPITAL MANAGEMENT LLC | 4.3% | 2,508,771 | 0% | 0.01% | $270,094,286 |
| STATE STREET CORP | 3.8% | 2,182,617 | +2.8% | 0.01% | $234,980,546 |
| AMERIPRISE FINANCIAL INC | 2.8% | 1,610,774 | -23% | 0.04% | $173,416,177 |
| CITADEL ADVISORS LLC | 2.5% | 1,446,926 | +5268% | 0.11% | $155,776,053 |
| ALLIANCEBERNSTEIN L.P. | 2.4% | 1,397,556 | -15% | 0.05% | $157,798,048 |
| Holocene Advisors, LP | 2.4% | 1,383,715 | +6.5% | 0.36% | $148,970,757 |
| GOLDMAN SACHS GROUP INC | 2.4% | 1,374,958 | +1.8% | 0.02% | $148,027,978 |
| GEODE CAPITAL MANAGEMENT, LLC | 2.3% | 1,356,453 | +2.9% | 0.01% | $146,063,660 |
| MILLENNIUM MANAGEMENT LLC | 2% | 1,173,696 | -27% | 0.09% | $126,360,111 |
| WILLIAM BLAIR INVESTMENT MANAGEMENT, LLC | 1.8% | 1,073,819 | -3% | 0.38% | $115,607,354 |
| Capital World Investors | 1.7% | 989,060 | +16% | 0.01% | $106,482,200 |
| Invesco Ltd. | 1.6% | 914,188 | +17% | 0.02% | $98,421,481 |
| BRAIDWELL LP | 1.3% | 763,505 | -17% | 2.7% | $82,198,948 |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | 1.2% | 714,389 | +0.05% | 0.01% | $76,911,120 |
| MORGAN STANLEY | 1.2% | 678,825 | +1.2% | 0% | $73,082,425 |
| BANK OF AMERICA CORP /DE/ | 1.1% | 657,432 | +22% | 0.01% | $70,779,103 |
| NOMURA ASSET MANAGEMENT INTERNATIONAL INC. | 1.1% | 612,063 | -9% | 0.11% | $65,895,000 |
| Artisan Partners Limited Partnership | 1% | 607,462 | -14% | 0.11% | $65,399,359 |
| NORTHERN TRUST CORP | 0.99% | 576,209 | -1.9% | 0.01% | $62,034,662 |
| Driehaus Capital Management LLC | 0.84% | 487,912 | 0.39% | $52,528,606 | |
| JENNISON ASSOCIATES LLC | 0.84% | 487,020 | 0.04% | $52,432,572 |
Quarter history
Institutional holders across reporting periods
Holder count, reported shares/value, and median price by quarter.
Periods
44
Latest
Q1 2026
Rows shown
1-25 of 44
| Period | 13F Shares, Excl. Options | Value, Excl. Options | Value Change | Price (Median) | Investors |
|---|---|---|---|---|---|
| 2026 Q1 | 57,984,500 | $6,250,629,458 | +$69,506,672 | $107.66 | 335 |
| 2025 Q4 | 57,074,132 | $6,443,592,197 | +$169,395,380 | $112.91 | 331 |
| 2025 Q3 | 55,921,410 | $4,561,721,472 | -$456,444,413 | $81.55 | 313 |
| 2025 Q2 | 61,056,629 | $6,306,184,856 | +$430,126,517 | $103.29 | 297 |
| 2025 Q1 | 56,920,710 | $5,602,550,629 | -$131,202,348 | $98.42 | 313 |
| 2024 Q4 | 57,136,161 | $8,567,896,672 | +$336,126,676 | $149.94 | 320 |
| 2024 Q3 | 54,888,174 | $7,151,261,658 | +$54,382,295 | $130.28 | 313 |
| 2024 Q2 | 54,042,831 | $6,395,837,794 | +$282,843,807 | $118.35 | 282 |
| 2024 Q1 | 51,842,920 | $4,888,448,545 | +$105,452,984 | $94.29 | 252 |
| 2023 Q4 | 50,930,304 | $4,048,545,236 | +$90,675,813 | $79.49 | 245 |
| 2023 Q3 | 49,799,223 | $3,747,316,168 | +$97,607,908 | $75.25 | 231 |
| 2023 Q2 | 48,437,046 | $3,449,116,516 | +$95,457,907 | $71.21 | 217 |
| 2023 Q1 | 47,342,474 | $2,371,756,462 | +$44,473,822 | $50.10 | 200 |
| 2022 Q4 | 46,564,095 | $2,034,031,934 | +$16,170,892 | $43.68 | 211 |
| 2022 Q3 | 44,438,207 | $2,366,244,684 | +$21,899,626 | $53.24 | 219 |
| 2022 Q2 | 44,147,155 | $2,006,060,592 | +$48,735,644 | $45.42 | 191 |
| 2022 Q1 | 43,205,720 | $2,498,715,661 | -$11,042,581 | $57.82 | 204 |
| 2021 Q4 | 43,543,281 | $1,935,700,781 | -$31,171,187 | $44.44 | 204 |
| 2021 Q3 | 44,184,518 | $2,128,367,593 | -$260,417,707 | $48.17 | 201 |
| 2021 Q2 | 48,339,669 | $4,100,514,324 | +$31,234,246 | $84.83 | 214 |
| 2021 Q1 | 49,205,858 | $4,130,409,129 | +$57,694,335 | $83.93 | 215 |
| 2020 Q4 | 48,537,899 | $3,653,566,909 | -$82,853,803 | $75.26 | 202 |
| 2020 Q3 | 50,418,256 | $2,497,765,020 | +$157,363,543 | $49.52 | 174 |
| 2020 Q2 | 47,326,259 | $1,818,308,189 | +$97,458,392 | $38.42 | 174 |
| 2020 Q1 | 44,993,563 | $1,388,618,776 | -$62,101,410 | $30.86 | 157 |