Comparable stake leader
BlackRock, Inc.
SEC ownership of GLAUKOS Corp
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001192448.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
10 Apr 2026
- Public ticker
- GKOS on NYSE
- Parsed ownership sources
- 13F, 13D/G, and 3/4/5
- Largest SEC-reported holder
- BlackRock, Inc.
- Latest 13D/G holder
- BlackRock, Inc.
- Latest parsed ownership date
- 10 Apr 2026
- Issuer CIK
- 0001192448
- Issuer location
- Aliso Viejo, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
2 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of GLAUKOS Corp (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
50/50
Latest evidence
10 Apr 2026
13F
13D/G
3/4/5
Lead comparable stake: 14%
13D/G row: BlackRock, Inc.
Showing 1-8 of 50 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 14%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
14%
JANUS HENDERSON GROUP PLC
9.2%
PRIMECAP MANAGEMENT CO/CA/
5.9%
VANGUARD PORTFOLIO MANAGEMENT LLC
5.6%
VANGUARD CAPITAL MANAGEMENT LLC
5.1%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
14%
from 13D/G
|
$978,632,521
9,090,029 shares
|
— | 31 Mar 2026 |
| JANUS HENDERSON GROUP PLC |
13D/G
13F
Company
|
9.2%
|
$622,553,178
5,348,395 shares
|
+$271,166,371 | 31 Mar 2026 |
| PRIMECAP MANAGEMENT CO/CA/ |
13D/G
13F
Company
|
5.9%
|
$381,288,940
3,376,928 shares
|
$0 | 31 Dec 2025 |
| VANGUARD PORTFOLIO MANAGEMENT LLC |
13D/G
13F
Vanguard Portfolio Management · Company
|
5.6%
|
$350,644,529
3,256,962 shares
|
$0 | 31 Mar 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13D/G
13F
Vanguard Capital Management · Company
|
5.1%
|
$317,279,080
2,947,047 shares
|
$0 | 31 Mar 2026 |
| FMR LLC |
13D/G
13F
Company
|
4.5%
|
$262,367,116
2,561,428 shares
|
-$360,259,421 | 31 Jul 2025 |
| Thomas W. Burns |
13D/G
3/4/5
CHAIRMAN & CEO, Director
|
4.4%
|
$239,613,202
2,553,695 shares
|
$0 | 31 Dec 2024 |
| WELLINGTON MANAGEMENT GROUP LLP |
13D/G
13F
Company
|
0.8%
|
$54,967,298
486,824 shares
|
-$311,358,358 | 31 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$46,678,695.
Buys
$0
Insiders: 0
Sells
$46,678,695
Insiders: 8
Net
-$46,678,695
Shares: -399,368
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 399,368
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 49,054 | $0 | $6,668,617 | -$6,668,617 |
| 3-6 | 0 | 325,000 | $0 | $37,739,242 | -$37,739,242 |
| 6-9 | 0 | 25,314 | $0 | $2,270,836 | -$2,270,836 |
| 9-12 | 0 | 0 | $0 | $0 | $0 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-13 of 13 reporting-owner rows connected to GLAUKOS Corp. Open a relationship link for the CIK-to-CIK filing trail.
Rows
13
Largest Forms 3/4/5 holder
Thomas W. Burns
Net 12M change
-$46,678,695
Latest report
28 May 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Thomas W. Burns | CHAIRMAN & CEO, Director | $201,828,760 | -$31,625,000 | -14% | Mixed | 02 Apr 2026 |
| Chris M. Calcaterra | Chief Operating Officer | $17,854,811 | Mixed | 24 Mar 2022 | ||
| Joseph E. Gilliam | President & Coo | $12,233,306 | -$6,451,663 | -35% | Mixed | 01 May 2026 |
| Tomas Navratil | Chief Development Officer | $10,865,185 | -$844,415 | -7.2% | Filing P/S | 10 Apr 2026 |
| David F. Hoffmeister | Director | $9,743,218 | Mixed | 28 May 2026 | ||
| Alex R. Thurman | Svp & Chief Financial Officer | $7,490,876 | -$1,922,435 | -20% | Mixed | 30 Apr 2026 |
| Mark J. Foley | Director | $6,488,345 | Median | 28 May 2026 | ||
| Aimee S. Weisner | Director | $5,618,667 | -$1,760,761 | -24% | Median | 28 May 2026 |
| William J. Link PhD | Director | $5,480,783 | Mixed | 03 Jun 2021 | ||
| Gilbert H. Kliman | Director | $4,274,029 | -$1,915,150 | -31% | Mixed | 28 May 2026 |
| Marc Stapley | Director | $4,233,944 | -$1,915,576 | -31% | Median | 28 May 2026 |
| Denice Torres | Director | $2,693,011 | Mixed | 28 May 2026 | ||
| Leana Wen | Director | $2,413,634 | -$243,695 | -9.2% | Mixed | 28 May 2026 |
Recent insider transactions for GLAUKOS Corp
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Aimee S. Weisner | GKOS | Common Stock | Award | 9.99% | 1,878 | 20,684 | 28 May 2026 | Direct | ||
| Aimee S. Weisner | GKOS | Stock Option (Right to Buy) | Award | 2,987 | 2,987 | 28 May 2026 | Direct | |||
| Leana Wen | GKOS | Common Stock | Award | 9.51% | 1,878 | 21,617 | 28 May 2026 | Direct | ||
| Leana Wen | GKOS | Stock Option (Right to Buy) | Award | 2,987 | 2,987 | 28 May 2026 | Direct | |||
| Denice Torres | GKOS | Common Stock | Award | 8.41% | 1,878 | 24,212 | 28 May 2026 | Direct | ||
| Denice Torres | GKOS | Stock Option (Right to Buy) | Award | 2,987 | 2,987 | 28 May 2026 | Direct | |||
| Mark J. Foley | GKOS | Common Stock | Award | 3.22% | 1,878 | 60,267 | 28 May 2026 | Direct | ||
| Mark J. Foley | GKOS | Stock Option (Right to Buy) | Award | 2,987 | 2,987 | 28 May 2026 | Direct | |||
| David F. Hoffmeister | GKOS | Common Stock | Award | 3.94% | 1,878 | 49,549 | 28 May 2026 | Direct | ||
| David F. Hoffmeister | GKOS | Stock Option (Right to Buy) | Award | 2,987 | 2,987 | 28 May 2026 | Direct | |||
| Gilbert H. Kliman | GKOS | Common Stock | Award | 5.29% | 1,878 | 37,406 | 28 May 2026 | Direct | ||
| Gilbert H. Kliman | GKOS | Stock Option (Right to Buy) | Award | 2,987 | 2,987 | 28 May 2026 | Direct | |||
| Marc Stapley | GKOS | Common Stock | Award | 5.01% | 1,878 | 39,327 | 28 May 2026 | Direct | ||
| Marc Stapley | GKOS | Stock Option (Right to Buy) | Award | 2,987 | 2,987 | 28 May 2026 | Direct | |||
| David F. Hoffmeister | GKOS | Common Stock | Options Exercise | 45.9% | 15,000 | 47,671 | 26 May 2026 | Direct | ||
| David F. Hoffmeister | GKOS | Stock Option (Right to Buy) | Options Exercise | -100% | -15,000 | 0 | 26 May 2026 | Direct | ||
| Gilbert H. Kliman | GKOS | Common Stock | Sale | -12.3% | $703,800 | $140.76 | -5,000 | 35,528 | 14 May 2026 | Direct |
| Gilbert H. Kliman | GKOS | Common Stock | Options Exercise | 14.1% | 5,000 | 40,528 | 14 May 2026 | Direct | ||
| Gilbert H. Kliman | GKOS | Stock Option (Right to Buy) | Options Exercise | -100% | -5,000 | 0 | 14 May 2026 | Direct | ||
| Gilbert H. Kliman | GKOS | Common Stock | Sale | -12.3% | $675,000 | $135.00 | -5,000 | 35,528 | 11 May 2026 | Direct |
| Gilbert H. Kliman | GKOS | Common Stock | Options Exercise | 14.1% | 5,000 | 40,528 | 11 May 2026 | Direct | ||
| Gilbert H. Kliman | GKOS | Stock Option (Right to Buy) | Options Exercise | -50% | -5,000 | 5,000 | 11 May 2026 | Direct | ||
| Joseph E. Gilliam | GKOS | Common Stock | Sale | -21% | $2,809,508 | $143.54 | -19,573 | 73,419 | 01 May 2026 | Direct |
| Leana Wen | GKOS | Common Stock | Sale | -7.93% | $243,695 | $143.35 | -1,700 | 19,739 | 01 May 2026 | Direct |
| Alex R. Thurman | GKOS | Common Stock | Sale | -18.6% | $1,400,000 | $140.00 | -10,000 | 43,681 | 30 Apr 2026 | Direct |
| Alex R. Thurman | GKOS | Common Stock | Options Exercise | 22.9% | 10,000 | 53,681 | 30 Apr 2026 | Direct | ||
| Alex R. Thurman | GKOS | Stock Option (Right to Buy) | Options Exercise | -25% | -10,000 | 30,000 | 30 Apr 2026 | Direct | ||
| Tomas Navratil | GKOS | Common Stock | Sale | -2.26% | $246,175 | $117.62 | -2,093 | 90,370 | 10 Apr 2026 | Direct |
| Tomas Navratil | GKOS | Common Stock | Tax liability | -3.12% | -2,977 | 92,463 | 02 Apr 2026 | Direct | ||
| Alex R. Thurman | GKOS | Common Stock | Tax liability | -3.51% | -1,589 | 43,681 | 02 Apr 2026 | Direct | ||
| Joseph E. Gilliam | GKOS | Common Stock | Tax liability | -3.3% | -3,169 | 92,992 | 02 Apr 2026 | Direct | ||
| Thomas William Burns | GKOS | Common Stock | Tax liability | -12% | -9,937 | 73,026 | 02 Apr 2026 | Direct | ||
| Thomas William Burns | GKOS | Common Stock | Gift | 18.8% | 180,308 | 1,141,593 | 01 Apr 2026 | Through the Burns Family Trust | ||
| Thomas William Burns | GKOS | Common Stock | Gift | -68.5% | -180,308 | 82,963 | 01 Apr 2026 | Direct | ||
| Tomas Navratil | GKOS | Common Stock | Tax liability | -5.73% | -5,798 | 95,440 | 31 Mar 2026 | Direct | ||
| Thomas William Burns | GKOS | Common Stock | Award | 9.83% | 23,564 | 263,271 | 25 Mar 2026 | Direct | ||
| Thomas William Burns | GKOS | Stock Option (Right to Buy) | Award | 227,661 | 110,254 | 25 Mar 2026 | Direct | |||
| Alex R. Thurman | GKOS | Common Stock | Award | 7.87% | 3,303 | 45,270 | 25 Mar 2026 | Direct | ||
| Alex R. Thurman | GKOS | Common Stock | Sale | -5.65% | $267,321 | $106.46 | -2,511 | 41,967 | 25 Mar 2026 | Direct |
| Alex R. Thurman | GKOS | Stock Option (Right to Buy) | Award | 169.1% | 28,743 | 45,738 | 25 Mar 2026 | Direct | ||
| Joseph E. Gilliam | GKOS | Common Stock | Award | 32.6% | 23,621 | 96,161 | 25 Mar 2026 | Direct | ||
| Joseph E. Gilliam | GKOS | Stock Option (Right to Buy) | Award | 75,168 | 71,475 | 25 Mar 2026 | Direct | |||
| Tomas Navratil | GKOS | Common Stock | Award | 47.9% | 32,781 | 101,238 | 25 Mar 2026 | Direct | ||
| Thomas William Burns | GKOS | Common Stock | Tax liability | -1.13% | -2,744 | 239,707 | 24 Mar 2026 | Direct | ||
| Tomas Navratil | GKOS | Common Stock | Tax liability | -3.59% | -2,546 | 68,457 | 24 Mar 2026 | Direct | ||
| Alex R. Thurman | GKOS | Common Stock | Tax liability | -4.34% | -2,020 | 44,478 | 24 Mar 2026 | Direct | ||
| Alex R. Thurman | GKOS | Common Stock | Sale | -3.17% | $160,070 | $105.24 | -1,521 | 46,498 | 24 Mar 2026 | Direct |
| Joseph E. Gilliam | GKOS | Common Stock | Tax liability | -14.5% | -12,314 | 72,540 | 24 Mar 2026 | Direct | ||
| Tomas Navratil | GKOS | Common Stock | Tax liability | -3.57% | -2,628 | 71,003 | 23 Mar 2026 | Direct | ||
| Alex R. Thurman | GKOS | Common Stock | Tax liability | -2.5% | -1,230 | 48,019 | 23 Mar 2026 | Direct |
* marks a reported price that did not pass the local price check.