GLAUKOS Corp
GKOS · Surgical & Medical Instruments & Apparatus · 58.7M shares · +4%/yr ↑ dilution · EDGAR filings ↗
Net buyback after stock comp: -$43M (gross $132K, SBC $44M)
Reference price $130.68 · est. market cap ~$7.7B — last insider sale, 2026-06-16 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
D50Ophthalmic-device/pharma (iStent/iDose) with strong growth but operating losses and cash burn.
Strengths
- Strong revenue growth — +32% (75th)
- Strong liquidity — current ratio 4.7 (70th)
Risks
- Operating/net losses — operating margin -39%, net margin -37%
- Cash burn — FCF -$22M
- Commercial-ramp/competition risk — per 10-K
Notable findings
- Net lossNet loss (net margin -37.0%)
- Cash burnNegative free cash flow (-22.5M)
- Fund exitedNotable fund(s) exited this quarter: VANGUARD GROUP INC
- Notable holderHeld by 5 notable fund(s): STATE STREET CORP, CITADEL ADVISORS LLC, GOLDMAN SACHS GROUP INC +2 more (as of 2026-03-31)
- New fund positionNotable fund(s) opened this quarter: RENAISSANCE TECHNOLOGIES LLC
- Insider sellingInsider selling — 32 open-market sale(s) by 8 insider(s) (cluster of 8 insiders, ~$44M, last 6mo) Form 4 ↗
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Gross margin
55.7%
Operating margin
-39.3%
Net margin
-37.0%
Return on equity
-28.6%
Return on assets
-21.0%
Revenue growth (QoQ)
5.2%
Current ratio
4.7×
Free cash flow
-$22M
EBITDA
-$162M
Tangible book value
$448M
Cash & investments
$91M
Cash runway
16q
Stock comp / revenue
12.5%
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-06-16 | Navratil Tomas | Sell | 1.5K | $130.68 |
| 2026-05-28 | Torres Denice | Grant | 1.9K | — |
| 2026-05-28 | Stapley Marc | Grant | 1.9K | — |
| 2026-05-28 | Foley Mark J | Grant | 1.9K | — |
| 2026-05-28 | Hoffmeister David F | Grant | 1.9K | — |
| 2026-05-28 | Kliman Gilbert H | Grant | 1.9K | — |
| 2026-05-28 | WEN LEANA | Grant | 1.9K | — |
| 2026-05-28 | WEISNER AIMEE S | Grant | 1.9K | — |
| 2026-05-26 | Hoffmeister David F | Option exercise | 15K | $24.69 |
| 2026-05-14 | Kliman Gilbert H | Option exercise | 5.0K | $24.69 |
| 2026-05-14 | Kliman Gilbert H | Sell | 5.0K | $140.76 |
| 2026-05-11 | Kliman Gilbert H | Option exercise | 5.0K | $24.69 |
| 2026-05-11 | Kliman Gilbert H | Sell | 5.0K | $135.00 |
| 2026-05-01 | Gilliam Joseph E | Sell | 20K | $143.54 |
| 2026-05-01 | WEN LEANA | Sell | 1.7K | $143.35 |
| 2026-04-30 | Thurman Alex R. | Option exercise | 10K | $38.68 |
| 2026-04-30 | Thurman Alex R. | Sell | 10K | $140.00 |
| 2026-04-10 | Navratil Tomas | Sell | 32 | $120.23 |
| 2026-04-10 | Navratil Tomas | Sell | 1.2K | $116.72 |
| 2026-04-10 | Navratil Tomas | Sell | 210 | $117.45 |
| 2026-04-10 | Navratil Tomas | Sell | 614 | $119.35 |
| 2026-04-02 | Thurman Alex R. | Tax withheld | 1.6K | $109.60 |
| 2026-04-02 | Gilliam Joseph E | Tax withheld | 3.2K | $109.60 |
| 2026-04-02 | Burns Thomas William | Tax withheld | 7.5K | $109.60 |
| 2026-04-02 | Navratil Tomas | Tax withheld | 1.1K | $109.60 |
| 2026-04-02 | Navratil Tomas | Tax withheld | 1.8K | $109.60 |
| 2026-04-02 | Burns Thomas William | Tax withheld | 2.5K | $109.60 |
| 2026-04-01 | Burns Thomas William | Gift | 180K | — |
| 2026-04-01 | Burns Thomas William | Gift | 180K | — |
| 2026-03-31 | Navratil Tomas | Tax withheld | 5.8K | $109.60 |
| 2026-03-25 | Burns Thomas William | Grant | 9.4K | — |
| 2026-03-25 | Burns Thomas William | Grant | 14K | — |
| 2026-03-25 | Thurman Alex R. | Sell | 2.5K | $106.46 |
| 2026-03-25 | Thurman Alex R. | Grant | 3.3K | — |
| 2026-03-25 | Navratil Tomas | Grant | 4.6K | — |
| 2026-03-25 | Navratil Tomas | Grant | 12K | — |
| 2026-03-25 | Navratil Tomas | Grant | 3.7K | — |
| 2026-03-25 | Navratil Tomas | Grant | 13K | — |
| 2026-03-25 | Gilliam Joseph E | Grant | 5.8K | — |
| 2026-03-25 | Gilliam Joseph E | Grant | 18K | — |
| 2026-03-24 | Gilliam Joseph E | Tax withheld | 4.9K | $105.23 |
| 2026-03-24 | Thurman Alex R. | Sell | 1.5K | $105.24 |
| 2026-03-24 | Thurman Alex R. | Tax withheld | 2.0K | $105.23 |
| 2026-03-24 | Navratil Tomas | Tax withheld | 2.5K | $105.23 |
| 2026-03-24 | Gilliam Joseph E | Tax withheld | 7.4K | $105.23 |
| 2026-03-24 | Burns Thomas William | Tax withheld | 2.7K | $105.23 |
| 2026-03-23 | Thurman Alex R. | Tax withheld | 1.2K | $106.84 |
| 2026-03-23 | Navratil Tomas | Tax withheld | 2.6K | $106.84 |
| 2026-03-23 | Gilliam Joseph E | Tax withheld | 2.8K | $106.84 |
| 2026-03-17 | Thurman Alex R. | Sell | 625 | $99.15 |
| 2026-03-16 | Navratil Tomas | Sell | 299 | $98.21 |
| 2026-03-16 | Navratil Tomas | Sell | 272 | $99.05 |
| 2026-03-16 | Burns Thomas William | Tax withheld | 2.8K | $98.94 |
| 2026-03-16 | Gilliam Joseph E | Tax withheld | 1.2K | $98.94 |
| 2026-03-16 | Thurman Alex R. | Tax withheld | 614 | $98.94 |
| 2026-03-16 | Navratil Tomas | Tax withheld | 958 | $98.94 |
| 2026-03-16 | Navratil Tomas | Sell | 460 | $97.33 |
| 2026-03-13 | Navratil Tomas | Tax withheld | 1.1K | $97.02 |
| 2026-03-13 | Gilliam Joseph E | Tax withheld | 2.5K | $97.02 |
| 2026-03-13 | Burns Thomas William | Tax withheld | 5.2K | $97.02 |
| 2026-03-05 | Navratil Tomas | Tax withheld | 361 | $112.10 |
| 2026-03-05 | Burns Thomas William | Tax withheld | 1.1K | $112.10 |
| 2026-02-24 | Navratil Tomas | Tax withheld | 396 | $119.17 |
| 2026-02-24 | Gilliam Joseph E | Tax withheld | 1.1K | $119.17 |
| 2026-02-24 | Burns Thomas William | Tax withheld | 4.1K | $119.17 |
| 2026-02-19 | WEISNER AIMEE S | Sell | 5.2K | $116.64 |
| 2026-02-19 | WEISNER AIMEE S | Gift | 980 | — |
| 2026-02-19 | WEISNER AIMEE S | Gift | 980 | — |
| 2026-02-19 | WEISNER AIMEE S | Option exercise | 15K | $24.69 |
| 2026-02-19 | WEISNER AIMEE S | Sell | 2.2K | $115.69 |
| 2026-02-19 | WEISNER AIMEE S | Sell | 1.1K | $117.33 |
| 2026-02-19 | WEISNER AIMEE S | Sell | 6.5K | $118.56 |
| 2026-02-09 | Burns Thomas William | Option exercise | 166K | $30.92 |
| 2026-02-06 | Burns Thomas William | Gift | 67K | — |
| 2026-02-06 | Burns Thomas William | Gift | 67K | — |
| 2026-01-22 | Gilliam Joseph E | Sell | 3.1K | $127.03 |
| 2026-01-22 | Gilliam Joseph E | Sell | 1.8K | $128.07 |
| 2026-01-22 | Gilliam Joseph E | Sell | 3.2K | $129.28 |
| 2026-01-22 | Stapley Marc | Option exercise | 15K | $24.69 |
| 2026-01-22 | Stapley Marc | Sell | 3.8K | $126.07 |
| 2026-01-22 | Stapley Marc | Sell | 1.7K | $127.92 |
| 2026-01-22 | Stapley Marc | Sell | 4.3K | $129.11 |
| 2026-01-22 | Stapley Marc | Sell | 1.3K | $129.78 |
| 2026-01-22 | Stapley Marc | Sell | 3.9K | $126.96 |
| 2026-01-22 | Gilliam Joseph E | Option exercise | 10K | $55.18 |
| 2026-01-22 | Gilliam Joseph E | Sell | 2.4K | $126.10 |
| 2026-01-21 | Gilliam Joseph E | Option exercise | 4.5K | $55.18 |
| 2026-01-21 | Gilliam Joseph E | Sell | 4.5K | $124.65 |
| 2026-01-16 | Burns Thomas William | Sell | 187K | $115.00 |
| 2026-01-16 | Burns Thomas William | Option exercise | 187K | $16.49 |
| 2026-01-08 | Burns Thomas William | Option exercise | 88K | $16.49 |
| 2026-01-08 | Burns Thomas William | Sell | 88K | $115.00 |
| 2026-01-02 | WEN LEANA | Grant | 623 | — |
| 2026-01-02 | Torres Denice | Grant | 623 | — |
| 2026-01-02 | Stapley Marc | Grant | 727 | — |
| 2026-01-02 | Foley Mark J | Grant | 1.2K | — |
| 2026-01-02 | Hoffmeister David F | Grant | 753 | — |
| 2026-01-02 | Kliman Gilbert H | Grant | 623 | — |
| 2026-01-02 | WEISNER AIMEE S | Grant | 623 | — |
| 2025-12-30 | Navratil Tomas | Tax withheld | 510 | $114.24 |
| 2025-12-30 | Burns Thomas William | Tax withheld | 1.1K | $114.24 |
| 2025-12-11 | Navratil Tomas | Grant | 2.1K | — |
| 2025-12-11 | Burns Thomas William | Grant | 4.2K | — |
| 2025-12-09 | Kliman Gilbert H | Sell | 5.0K | $107.27 |
| 2025-12-09 | Kliman Gilbert H | Option exercise | 5.0K | $24.69 |
| 2025-11-25 | Thurman Alex R. | Sell | 315 | $105.00 |
| 2025-11-18 | Gilliam Joseph E | Sell | 19K | $90.00 |
| 2025-09-23 | Navratil Tomas | Tax withheld | 483 | $84.69 |
| 2025-09-23 | Burns Thomas William | Tax withheld | 4.1K | $84.69 |
| 2025-09-23 | Gilliam Joseph E | Tax withheld | 1.1K | $84.69 |
| 2025-09-22 | Navratil Tomas | Sell | 276 | $84.70 |
| 2025-09-22 | Navratil Tomas | Sell | 23 | $82.79 |
| 2025-09-22 | Navratil Tomas | Sell | 218 | $83.76 |
| 2025-09-19 | Navratil Tomas | Tax withheld | 510 | $83.47 |
| 2025-09-19 | Burns Thomas William | Tax withheld | 1.1K | $83.47 |
| 2025-09-18 | Navratil Tomas | Grant | 1.9K | — |
| 2025-09-18 | Burns Thomas William | Grant | 15K | — |
| 2025-09-18 | Gilliam Joseph E | Grant | 3.9K | — |
| 2025-09-11 | Navratil Tomas | Sell | 3.2K | $87.98 |
| 2025-09-11 | Navratil Tomas | Sell | 1.9K | $88.61 |
| 2025-06-11 | Hoffmeister David F | Option exercise | 25K | $32.00 |
| 2025-05-29 | WEN LEANA | Grant | 2.1K | — |
| 2025-05-29 | Foley Mark J | Grant | 2.1K | — |
| 2025-05-29 | Hoffmeister David F | Grant | 2.1K | — |
| 2025-05-29 | Stapley Marc | Grant | 2.1K | — |
| 2025-05-29 | WEISNER AIMEE S | Grant | 2.1K | — |
| 2025-05-29 | Torres Denice | Grant | 2.1K | — |
| 2025-05-29 | Kliman Gilbert H | Grant | 2.1K | — |
| 2025-05-28 | Gilliam Joseph E | Tax withheld | 1.1K | $96.97 |
| 2025-05-27 | Navratil Tomas | Tax withheld | 483 | $96.97 |
| 2025-05-27 | Burns Thomas William | Tax withheld | 4.1K | $96.97 |
| 2025-05-07 | Navratil Tomas | Tax withheld | 510 | $88.24 |
| 2025-05-07 | Burns Thomas William | Tax withheld | 1.1K | $88.24 |
| 2025-04-21 | Burns Thomas William | Tax withheld | 8.0K | $97.09 |
| 2025-04-21 | Thurman Alex R. | Tax withheld | 2.5K | $97.09 |
| 2025-04-01 | Navratil Tomas | Tax withheld | 484 | $97.09 |
| 2025-04-01 | Gilliam Joseph E | Tax withheld | 1.9K | $97.09 |
| 2025-04-01 | Burns Thomas William | Tax withheld | 4.1K | $97.09 |
| 2025-04-01 | Thurman Alex R. | Tax withheld | 311 | $97.09 |
| 2025-03-31 | Burns Thomas William | Tax withheld | 1.1K | $98.42 |
| 2025-03-31 | Navratil Tomas | Tax withheld | 510 | $98.42 |
| 2025-03-25 | Thurman Alex R. | Tax withheld | 1.6K | $96.60 |
| 2025-03-25 | Navratil Tomas | Tax withheld | 5.1K | $107.61 |
| 2025-03-25 | Navratil Tomas | Tax withheld | 1.8K | $96.60 |
| 2025-03-25 | Thurman Alex R. | Tax withheld | 3.3K | $107.61 |
| 2025-03-25 | Thurman Alex R. | Sell | 1.1K | $106.56 |
| 2025-03-25 | Thurman Alex R. | Sell | 430 | $107.44 |
| 2025-03-25 | Thurman Alex R. | Sell | 31 | $108.14 |
| 2025-03-25 | Burns Thomas William | Tax withheld | 2.0K | $107.61 |
| 2025-03-25 | Burns Thomas William | Tax withheld | 7.5K | $96.60 |
| 2025-03-25 | Gilliam Joseph E | Tax withheld | 13K | $107.61 |
| 2025-03-25 | Gilliam Joseph E | Tax withheld | 2.9K | $96.60 |
| 2025-03-17 | Thurman Alex R. | Tax withheld | 489 | $102.19 |
| 2025-03-17 | Gilliam Joseph E | Tax withheld | 1.0K | $102.19 |
| 2025-03-17 | Navratil Tomas | Tax withheld | 958 | $102.19 |
| 2025-03-17 | Burns Thomas William | Tax withheld | 2.0K | $102.19 |
| 2025-03-13 | Thurman Alex R. | Grant | 5.0K | — |
| 2025-03-13 | Gilliam Joseph E | Grant | 3.9K | — |
| 2025-03-13 | Thurman Alex R. | Grant | 3.3K | — |
| 2025-03-13 | Gilliam Joseph E | Grant | 18K | — |
| 2025-03-13 | Burns Thomas William | Grant | 15K | — |
| 2025-03-13 | Burns Thomas William | Grant | 14K | — |
| 2025-03-13 | Burns Thomas William | Grant | 15K | — |
| 2025-03-13 | Burns Thomas William | Grant | 40K | — |
| 2025-03-13 | Gilliam Joseph E | Grant | 5.8K | — |
| 2025-03-13 | Navratil Tomas | Grant | 12K | — |
| 2025-03-13 | Navratil Tomas | Grant | 3.7K | — |
| 2025-03-13 | Navratil Tomas | Grant | 1.9K | — |
| 2025-02-26 | Foley Mark J | Sell | 21K | $120.72 |
| 2025-02-26 | Foley Mark J | Option exercise | 25K | $32.00 |
| 2025-02-26 | Foley Mark J | Option exercise | 15K | $24.69 |
| 2025-02-14 | Navratil Tomas | Sell | 3.4K | $147.14 |
| 2025-01-06 | Navratil Tomas | Tax withheld | 1.2K | $149.68 |
| 2025-01-02 | WEN LEANA | Grant | 461 | — |
| 2025-01-02 | Kliman Gilbert H | Grant | 461 | — |
| 2025-01-02 | Torres Denice | Grant | 461 | — |
| 2025-01-02 | WEISNER AIMEE S | Grant | 461 | — |
| 2025-01-02 | Stapley Marc | Grant | 538 | — |
| 2025-01-02 | Hoffmeister David F | Grant | 557 | — |
| 2025-01-02 | Foley Mark J | Grant | 864 | — |
| 2024-12-31 | Burns Thomas William | Tax withheld | 549 | $151.16 |
| 2024-12-31 | Navratil Tomas | Tax withheld | 255 | $151.16 |
| 2024-12-30 | Navratil Tomas | Grant | 2.1K | — |
| 2024-12-30 | Burns Thomas William | Grant | 4.2K | — |
All non-derivative Form 4 activity (SEC), newest first.
Notable events (8-K)
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-06-03 | 2026-05-28 | 0001193125-26-255758 ↗ |
| 8-K | 2026-05-04 | 2026-05-04 | 0001193125-26-202466 ↗ |
| 10-Q | 2026-04-30 | 2026-03-31 | 0001193125-26-193004 ↗ |
| 8-K | 2026-04-29 | 2026-04-29 | 0001193125-26-191553 ↗ |
| 8-K | 2026-03-02 | 2026-03-02 | 0001104659-26-021885 ↗ |
| 10-K | 2026-02-23 | 2025-12-31 | 0001193125-26-061944 ↗ |
| 8-K | 2026-02-17 | 2026-02-17 | 0001104659-26-016410 ↗ |
| 8-K | 2026-01-13 | 2026-01-13 | 0001104659-26-003321 ↗ |
| 8-K | 2025-11-10 | 2025-11-10 | 0001104659-25-108796 ↗ |
| 10-Q | 2025-10-31 | 2025-09-30 | 0001104659-25-104529 ↗ |
| 8-K | 2025-10-29 | 2025-10-29 | 0001104659-25-103722 ↗ |
| 8-K | 2025-08-12 | 2025-08-12 | 0001558370-25-011142 ↗ |