GLAUKOS Corp (GKOS)
Every FINRA and SEC series the site collects for GLAUKOS Corp: short interest with days to cover, daily short sale volume, fails to deliver and Form 4 insider trades. Listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus.
3.8M
Short interest
settlement 2026-08-31
6.7
Days to cover
-3.3% vs prior
55.1%
Short share of volume
2026-09-17
1,400
Fails to deliver
settlement 2026-08-31
Wed 28 Oct
Next earnings
estimated; last year 2025-10-29
-$17.7M
Insider flow, 90 days
0 buys, 15 sells
As of 2026-09-17.
Short interest
FINRA, twice a month; the last 12 months shown, all 48 settlements in the JSONAs of 31 August 2026, short interest in GKOS is 3,821,554 shares, up 195,173 shares over the last month. Over the last 48 readings it ranged from 2,021,374 shares (31 December 2025) to 4,974,048 shares (30 June 2025). At the reported average volume of 574K shares a day that is 6.7 days to cover, elevated.
Embed this chartkeeps the attribution line it carries
<iframe src="https://xoomar.com/embed/stocks/gkos" width="100%" height="440" style="border:0;max-width:100%" loading="lazy" title="XOOMAR chart"></iframe>
| Settlement | Shares short | Change | Avg daily volume | Days to cover |
|---|---|---|---|---|
| 2026-08-31 | 3,821,554 | -3.3% | 574,294 | 6.65 |
| 2026-08-14 | 3,951,091 | +8.9% | 758,730 | 5.21 |
| 2026-07-31 | 3,626,381 | -22.9% | 995,081 | 3.64 |
| 2026-07-15 | 4,703,342 | +5.7% | 747,421 | 6.29 |
| 2026-06-30 | 4,449,767 | +6.6% | 997,150 | 4.46 |
| 2026-06-15 | 4,175,926 | +33.9% | 1,195,322 | 3.49 |
| 2026-05-29 | 3,118,577 | -5.7% | 1,524,894 | 2.05 |
| 2026-05-15 | 3,305,566 | +13.8% | 775,286 | 4.26 |
| 2026-04-30 | 2,905,337 | -10.1% | 803,838 | 3.61 |
| 2026-04-15 | 3,233,264 | +4.3% | 661,623 | 4.89 |
| 2026-03-31 | 3,099,829 | +15.9% | 743,529 | 4.17 |
| 2026-03-13 | 2,673,825 | -7.0% | 697,178 | 3.84 |
| 2026-02-27 | 2,873,448 | +6.5% | 910,460 | 3.16 |
| 2026-02-13 | 2,699,390 | +8.7% | 664,950 | 4.06 |
| 2026-01-30 | 2,483,025 | +11.6% | 1,008,213 | 2.46 |
| 2026-01-15 | 2,225,683 | +10.1% | 787,771 | 2.83 |
| 2025-12-31 | 2,021,374 | -1.3% | 581,517 | 3.48 |
| 2025-12-15 | 2,047,441 | -9.0% | 754,017 | 2.72 |
| 2025-11-28 | 2,250,099 | -16.2% | 1,029,387 | 2.19 |
| 2025-11-14 | 2,686,235 | -8.9% | 1,250,844 | 2.15 |
| 2025-10-31 | 2,947,690 | +22.4% | 2,056,466 | 1.43 |
| 2025-10-15 | 2,407,704 | -23.6% | 725,920 | 3.32 |
| 2025-09-30 | 3,153,613 | -2.4% | 874,674 | 3.61 |
| 2025-09-15 | 3,232,646 | -4.5% | 813,242 | 3.98 |
Daily short volume
FINRA Reg SHO, last 60 sessions. JSONAs of 17 September 2026, the short share of GKOS volume is 55.1%, up 16.9 points over the last five sessions. Over the last 52 readings it ranged from 31.6% (18 August 2026) to 80.1% (2 September 2026). The latest reading is 2.3 points above the 30-session average of 52.7%, on 246K shares reported.
| Date | Short volume | Total volume | Short share | Exempt |
|---|---|---|---|---|
| 2026-09-17 | 135K | 246K | 55.1% | 416 |
| 2026-09-16 | 126K | 312K | 40.4% | 0 |
| 2026-09-15 | 115K | 203K | 56.6% | 10 |
| 2026-09-14 | 159K | 271K | 58.6% | 10 |
| 2026-09-11 | 104K | 234K | 44.5% | 0 |
| 2026-09-10 | 145K | 381K | 38.2% | 5 |
| 2026-09-09 | 154K | 228K | 67.5% | 10 |
| 2026-09-08 | 213K | 362K | 58.8% | 0 |
| 2026-09-04 | 129K | 290K | 44.4% | 400 |
| 2026-09-03 | 122K | 245K | 49.7% | 3 |
| 2026-09-02 | 317K | 395K | 80.1% | 4 |
| 2026-09-01 | 132K | 191K | 69.0% | 0 |
| 2026-08-31 | 72K | 162K | 44.3% | 250 |
| 2026-08-28 | 110K | 282K | 39.1% | 8 |
| 2026-08-27 | 88K | 223K | 39.4% | 170 |
| 2026-08-26 | 100K | 215K | 46.8% | 0 |
| 2026-08-25 | 111K | 256K | 43.4% | 134 |
| 2026-08-24 | 127K | 284K | 44.7% | 0 |
| 2026-08-21 | 116K | 182K | 63.9% | 0 |
| 2026-08-20 | 132K | 304K | 43.4% | 307 |
| 2026-08-19 | 105K | 219K | 48.0% | 0 |
| 2026-08-18 | 77K | 245K | 31.6% | 0 |
| 2026-08-17 | 128K | 304K | 41.9% | 2 |
| 2026-08-14 | 158K | 281K | 56.2% | 16 |
| 2026-08-13 | 194K | 426K | 45.5% | 192 |
| 2026-08-12 | 163K | 272K | 59.9% | 111 |
| 2026-08-11 | 171K | 283K | 60.4% | 0 |
| 2026-08-10 | 185K | 251K | 73.7% | 0 |
| 2026-08-07 | 257K | 376K | 68.3% | 341 |
| 2026-08-06 | 141K | 205K | 68.9% | 728 |
Fails to deliver
SEC, by settlement date. JSONAs of 31 August 2026, the fails-to-deliver balance in GKOS is 1,400 shares, up 1,397 shares over the last settlement date. Over the last 52 readings it ranged from 1 share (21 November 2025) to 27,832 shares (17 October 2025). The latest reading sits at the bottom of that range.
| Settlement | Shares failed | Price | Value |
|---|---|---|---|
| 2026-08-31 | 1,400 | $179.87 | $252K |
| 2026-08-28 | 3 | $181.91 | $546 |
| 2026-08-25 | 482 | $185.65 | $89K |
| 2026-08-24 | 1,884 | $184.89 | $348K |
| 2026-08-21 | 979 | $184.89 | $181K |
| 2026-08-20 | 857 | $189.55 | $162K |
| 2026-07-24 | 100 | $152.13 | $15K |
| 2026-07-23 | 100 | $152.86 | $15K |
| 2026-07-22 | 100 | $153.09 | $15K |
| 2026-07-20 | 5,617 | $156.83 | $881K |
| 2026-07-17 | 21 | $155.39 | $3K |
| 2026-07-10 | 44 | $155.07 | $7K |
| 2026-07-01 | 104 | $139.76 | $15K |
| 2026-06-25 | 847 | $137.76 | $117K |
| 2026-06-24 | 37 | $134.65 | $5K |
| 2026-06-22 | 693 | $130.68 | $91K |
| 2026-06-11 | 39 | $122.49 | $5K |
| 2026-06-09 | 203 | $121.96 | $25K |
| 2026-06-08 | 856 | $125.00 | $107K |
| 2026-06-05 | 96 | $121.69 | $12K |
| 2026-06-02 | 2,756 | $103.12 | $284K |
| 2026-06-01 | 398 | $103.35 | $41K |
| 2026-05-26 | 791 | $120.23 | $95K |
| 2026-05-22 | 10,484 | $139.03 | $1.5M |
| 2026-05-18 | 2,000 | $144.01 | $288K |
| 2026-04-20 | 534 | $124.79 | $67K |
| 2026-04-13 | 8,538 | $116.40 | $994K |
| 2026-04-01 | 818 | $107.66 | $88K |
| 2026-03-26 | 3,093 | $109.60 | $339K |
| 2026-03-23 | 9 | $100.99 | $909 |
Insider trades
SEC Form 4, newest first, 50 of 100 shown. JSONInsiders at GKOS reported 15 open-market sells worth $17.7M in the last 90 days and no open-market buys. Sells alone are a weak signal; insiders sell for tax, diversification and estate reasons all the time. Latest filing: Navratil Tomas (CHIEF DEVELOPMENT OFFICER) on 2026-09-16.
| Date | Insider | Title | Type | Shares | Price | Value | Owned after |
|---|---|---|---|---|---|---|---|
| 2026-09-16 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 4 | $172.00 | $688 | 72K |
| 2026-09-16 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 234 | $170.95 | $40K | 72K |
| 2026-09-16 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 120 | $168.38 | $20K | 73K |
| 2026-09-16 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 460 | $167.32 | $77K | 73K |
| 2026-09-16 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 191 | $166.20 | $32K | 73K |
| 2026-09-16 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 345 | $164.60 | $57K | 73K |
| 2026-09-16 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 103 | $163.20 | $17K | 74K |
| 2026-08-28 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 10 | $182.50 | $2K | 74K |
| 2026-08-28 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 6K | $181.19 | $1.1M | 74K |
| 2026-08-28 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 8K | $180.25 | $1.4M | 80K |
| 2026-08-19 | Kliman Gilbert H | n/a | Sell | 3K | $190.00 | $475K | 37K |
| 2026-08-19 | Kliman Gilbert H | n/a | Option exercise | 3K | $25.77 | $64K | 40K |
| 2026-08-11 | Gilliam Joseph E | PRESIDENT & COO | Sell | 32K | $180.49 | $5.8M | 73K |
| 2026-08-11 | Gilliam Joseph E | PRESIDENT & COO | Sell | 28K | $178.89 | $5.0M | 105K |
| 2026-08-11 | Gilliam Joseph E | PRESIDENT & COO | Option exercise | 20K | $55.18 | $1.1M | 103K |
| 2026-08-11 | Gilliam Joseph E | PRESIDENT & COO | Option exercise | 10K | $48.46 | $485K | 83K |
| 2026-08-07 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Sell | 20K | $180.13 | $3.6M | 44K |
| 2026-08-07 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Option exercise | 20K | $33.81 | $676K | 64K |
| 2026-07-31 | WEN LEANA | n/a | Sell | 525 | $167.63 | $88K | 21K |
| 2026-06-25 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Tax withholding | 483 | $142.57 | $69K | 88K |
| 2026-06-25 | Gilliam Joseph E | PRESIDENT & COO | Tax withholding | 1K | $142.57 | $151K | 72K |
| 2026-06-25 | Burns Thomas William | CHAIRMAN & CEO | Tax withholding | 4K | $142.57 | $579K | 69K |
| 2026-06-16 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 2K | $130.68 | $201K | 89K |
| 2026-05-28 | WEN LEANA | n/a | Grant | 2K | $0.00 | $0 | 22K |
| 2026-05-28 | Torres Denice | n/a | Grant | 2K | $0.00 | $0 | 24K |
| 2026-05-28 | Stapley Marc | n/a | Grant | 2K | $0.00 | $0 | 39K |
| 2026-05-28 | Hoffmeister David F | n/a | Grant | 2K | $0.00 | $0 | 50K |
| 2026-05-28 | Kliman Gilbert H | n/a | Grant | 2K | $0.00 | $0 | 37K |
| 2026-05-28 | WEISNER AIMEE S | n/a | Grant | 2K | $0.00 | $0 | 21K |
| 2026-05-28 | Foley Mark J | n/a | Grant | 2K | $0.00 | $0 | 60K |
| 2026-05-26 | Hoffmeister David F | n/a | Option exercise | 15K | $24.69 | $370K | 48K |
| 2026-05-14 | Kliman Gilbert H | n/a | Sell | 5K | $140.76 | $704K | 36K |
| 2026-05-14 | Kliman Gilbert H | n/a | Option exercise | 5K | $24.69 | $123K | 41K |
| 2026-05-11 | Kliman Gilbert H | n/a | Sell | 5K | $135.00 | $675K | 36K |
| 2026-05-11 | Kliman Gilbert H | n/a | Option exercise | 5K | $24.69 | $123K | 41K |
| 2026-05-01 | WEN LEANA | n/a | Sell | 2K | $143.35 | $244K | 20K |
| 2026-05-01 | Gilliam Joseph E | PRESIDENT & COO | Sell | 20K | $143.54 | $2.8M | 73K |
| 2026-04-30 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Sell | 10K | $140.00 | $1.4M | 44K |
| 2026-04-30 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Option exercise | 10K | $38.68 | $387K | 54K |
| 2026-04-10 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 32 | $120.23 | $4K | 90K |
| 2026-04-10 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 614 | $119.35 | $73K | 90K |
| 2026-04-10 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 210 | $117.45 | $25K | 91K |
| 2026-04-10 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Sell | 1K | $116.72 | $144K | 91K |
| 2026-04-02 | Thurman Alex R. | SVP & CHIEF FINANCIAL OFFICER | Tax withholding | 2K | $109.60 | $174K | 44K |
| 2026-04-02 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Tax withholding | 2K | $109.60 | $201K | 92K |
| 2026-04-02 | Navratil Tomas | CHIEF DEVELOPMENT OFFICER | Tax withholding | 1K | $109.60 | $126K | 94K |
| 2026-04-02 | Gilliam Joseph E | PRESIDENT & COO | Tax withholding | 3K | $109.60 | $347K | 93K |
| 2026-04-02 | Burns Thomas William | CHAIRMAN & CEO | Tax withholding | 7K | $109.60 | $818K | 73K |
| 2026-04-02 | Burns Thomas William | CHAIRMAN & CEO | Tax withholding | 2K | $109.60 | $271K | 80K |
| 2026-04-01 | Burns Thomas William | CHAIRMAN & CEO | Gift | 180K | $0.00 | $0 | 83K |
Form 4 filings are due within two business days of the trade. Insiders sell for many reasons that say nothing about the company; open-market buys are the rarer, stronger signal.
Planned sales (Form 144)
Newest first. JSON31 Form 144 notices on file for GKOS worth $68.9M at the prices reported; 10 in the last 90 days worth $22.4M. Latest: Navratil Tomas filed on 2026-09-16 to sell 1,457 shares ($243K) from 2026-09-16.
| Filed | Seller | Shares | Market value | Of outstanding | Sale from | Broker |
|---|---|---|---|---|---|---|
| 2026-09-16 | Navratil TomasOfficer | 1K | $243K | 0.002% | 2026-09-16 | Fidelity Brokerage Services LLC |
| 2026-08-28 | Navratil TomasOfficer | 14K | $2.5M | 0.023% | 2026-08-28 | Fidelity Brokerage Services LLC |
| 2026-08-19 | Kliman Gilbert HDirector | 3K | $475K | 0.004% | 2026-08-19 | Fidelity Brokerage Services LLC |
| 2026-08-11 | Gilliam Joseph EOfficer | 60K | $10.8M | 0.102% | 2026-08-11 | Fidelity Brokerage Services LLC |
| 2026-08-07 | Thurman Alex R.Officer | 20K | $3.6M | 0.034% | 2026-08-07 | Fidelity Brokerage Services LLC |
| 2026-07-31 | WEN LEANADirector | 525 | $88K | 0.001% | 2026-07-31 | Fidelity Brokerage Services LLC |
| 2026-07-16 | Thurman Alex R.Officer | 10K | $1.6M | 0.017% | 2026-07-16 | Fidelity Brokerage Services LLC |
| 2026-07-09 | Thurman Alex R.Officer | 10K | $1.6M | 0.017% | 2026-07-09 | Fidelity Brokerage Services LLC |
| 2026-07-06 | Thurman Alex R.Officer | 10K | $1.5M | 0.017% | 2026-07-06 | Fidelity Brokerage Services LLC |
| 2026-07-01 | Navratil TomasOfficer | 716 | $100K | 0.001% | 2026-07-01 | Fidelity Brokerage Services LLC |
| 2026-06-16 | Navratil TomasOfficer | 2K | $201K | 0.003% | 2026-06-16 | Fidelity Brokerage Services LLC |
| 2026-05-14 | Kliman Gilbert HDirector | 5K | $704K | 0.009% | 2026-05-14 | Fidelity Brokerage Services LLC |
| 2026-05-11 | Kliman Gilbert HDirector | 5K | $675K | 0.009% | 2026-05-11 | Fidelity Brokerage Services LLC |
| 2026-05-01 | WEN LEANADirector | 2K | $247K | 0.003% | 2026-05-01 | Fidelity Brokerage Services LLC |
| 2026-05-01 | Gilliam Joseph EOfficer | 20K | $2.8M | 0.033% | 2026-05-01 | Fidelity Brokerage Services LLC |
| 2026-04-30 | Thurman Alex R.Officer | 10K | $1.4M | 0.017% | 2026-04-30 | Fidelity Brokerage Services LLC |
| 2026-04-10 | Navratil TomasOfficer | 2K | $246K | 0.004% | 2026-04-10 | Fidelity Brokerage Services LLC |
| 2026-03-25 | Thurman Alex R.Officer | 3K | $267K | 0.004% | 2026-03-25 | Fidelity Brokerage Services LLC |
| 2026-03-24 | Thurman Alex R.Officer | 2K | $160K | 0.003% | 2026-03-24 | Fidelity Brokerage Services LLC |
| 2026-03-17 | Thurman Alex R.Officer | 625 | $62K | 0.001% | 2026-03-17 | Fidelity Brokerage Services LLC |
| 2026-03-16 | Navratil TomasOfficer | 1K | $101K | 0.002% | 2026-03-16 | Fidelity Brokerage Services LLC |
| 2026-02-19 | WEISNER AIMEE SDirector | 15K | $1.8M | 0.026% | 2026-02-19 | Fidelity Brokerage Services LLC |
| 2026-01-22 | Gilliam Joseph EOfficer | 10K | $1.3M | 0.018% | 2026-01-22 | Fidelity Brokerage Services LLC |
| 2026-01-22 | Stapley MarcDirector | 15K | $1.9M | 0.026% | 2026-01-22 | Fidelity Brokerage Services LLC |
| 2026-01-21 | Gilliam Joseph EOfficer | 5K | $561K | 0.008% | 2026-01-21 | Fidelity Brokerage Services LLC |
| 2026-01-16 | Burns Thomas WilliamOfficer, Director | 187K | $21.5M | 0.325% | 2026-01-16 | Fidelity Brokerage Services LLC |
| 2026-01-08 | Burns Thomas WilliamOfficer, Director | 88K | $10.1M | 0.153% | 2026-01-08 | Fidelity Brokerage Services LLC |
| 2025-12-09 | Kliman Gilbert HDirector | 5K | $536K | 0.009% | 2025-12-09 | Fidelity Brokerage Services LLC |
| 2025-11-25 | Thurman Alex R.Officer | 315 | $33K | 0.001% | 2025-11-25 | Fidelity Brokerage Services LLC |
| 2025-11-18 | Gilliam Joseph EOfficer | 19K | $1.7M | 0.034% | 2025-11-18 | Fidelity Brokerage Services LLC |
| 2025-09-22 | Navratil TomasOfficer | 517 | $44K | 0.001% | 2025-09-22 | Fidelity Brokerage Services LLC |
Large holders (13D and 13G)
One row per reporting person, newest filing first. JSON8 holders above 5% have filed on GKOS, all on Schedule 13G (passive). The largest reported stake is JANUS HENDERSON GROUP PLC at 9.2% of the class (5,348,395 shares), filed 2026-05-15 for an event on 2026-03-31.
| Filed | Form | Holder | Shares | Of class | Event |
|---|---|---|---|---|---|
| 2026-05-15 | 13G/Ano. 1 | JANUS HENDERSON GROUP PLCparent holding company | 5.3M | 9.2% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Portfolio Managementinvestment adviser | 3.3M | 5.6% | 2026-03-31 |
| 2026-04-29 | 13G | Vanguard Capital Managementinvestment adviser | 2.9M | 5.1% | 2026-03-31 |
| 2026-03-26 | 13G/Ano. 3 | The Vanguard Groupinvestment adviser | 0 | 0.0% | 2026-03-13 |
| 2026-02-17 | 13G | JANUS HENDERSON GROUP PLCparent holding company | 3.0M | 5.3% | 2025-12-31 |
| 2026-02-11 | 13G | PRIMECAP MANAGEMENT CO/CA/investment adviser | 3.4M | 5.9% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 1 | Wellington Management Group LLPparent holding company | 487K | 0.8% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 1 | Wellington Investment Advisors Holdings LLPparent holding company | 487K | 0.8% | 2025-12-31 |
| 2026-02-10 | 13G/Ano. 1 | Wellington Group Holdings LLPparent holding company | 487K | 0.8% | 2025-12-31 |
13F holders
Tracked managers holding GKOS at their latest 13F. JSON8 of the 30 tracked managers held GKOS at their latest 13F, $488.5M in total at quarter-end prices. Millennium Management is the largest at $225.2M (0.1% of its portfolio) as of 2026-06-30. Over the prior quarter 5 added shares and 2 cut.
| Fund | Quarter | Shares | Value | Of portfolio | Change in shares |
|---|---|---|---|---|---|
| Millennium Management | 2026-06-30 | 1.6M | $225.2M | 0.08% | +377K |
| Citadel Advisors | 2026-06-30 | 1.5M | $203.9M | 0.02% | -12K |
| Renaissance Technologies | 2026-06-30 | 147K | $20.6M | 0.03% | +28K |
| Point72 Asset Management | 2026-06-30 | 138K | $19.3M | 0.02% | +37K |
| Two Sigma Investments | 2026-06-30 | 63K | $8.9M | 0.01% | 0 |
| D. E. Shaw & Co. | 2026-06-30 | 57K | $8.0M | 0.00% | -194K |
| AQR Capital Management | 2026-06-30 | 16K | $2.3M | 0.00% | +2K |
| Bridgewater Associates | 2026-06-30 | 3K | $463K | 0.00% | +954 |
Only the 30 tracked managers on the funds hub; a 13F reports long positions in US listed stock at quarter end, 45 days late, and says nothing about shorts or positions sold since.
Financials
SEC XBRL, as filed. JSONIn Q2 2026 (quarter ended 2026-06-30) GLAUKOS Corp reported revenue of $185.6M, up 49.5% from the same quarter a year earlier, and net loss of $18.4M (-0.31 diluted EPS). In FY 2025 it generated -$14.8M of operating cash flow.
- Cash
- $114.5M
- Equity
- $682.5M
- Total assets
- $920.5M
- Shares outstanding
- 58,983,937
Quarterly, last 8 quarters
| Quarter | Period end | Revenue | Net income | Margin | Diluted EPS |
|---|---|---|---|---|---|
| Q2 2026 | 2026-06-30 | $185.6M | -$18.4M | -9.9% | -0.31 |
| Q1 2026 | 2026-03-31 | $150.6M | -$19.8M | -13.1% | -0.34 |
| Q4 2025derived | 2025-12-31 | $143.1M | n/a | n/a | n/a |
| Q3 2025 | 2025-09-30 | $133.5M | -$16.2M | -12.2% | -0.28 |
| Q2 2025 | 2025-06-30 | $124.1M | -$19.7M | -15.8% | -0.34 |
| Q1 2025 | 2025-03-31 | $106.7M | -$18.1M | -17.0% | -0.32 |
| Q4 2024derived | 2024-12-31 | $105.5M | n/a | n/a | n/a |
| Q3 2024 | 2024-09-30 | $96.7M | -$21.4M | -22.1% | -0.39 |
Fiscal years, with buybacks and dividends
| Fiscal year | Ends | Revenue | Net income | Operating cash flow | Capex | Buybacks | Dividends |
|---|---|---|---|---|---|---|---|
| FY 2025 | 2025-12-31 | $507.4M | n/a | -$14.8M | $7.7M | n/a | n/a |
| FY 2024 | 2024-12-31 | $383.5M | n/a | -$61.3M | $6.3M | n/a | n/a |
| FY 2023 | 2023-12-31 | $314.7M | n/a | -$57.8M | $20.2M | n/a | n/a |
| FY 2022 | 2022-12-31 | $282.9M | n/a | -$33.1M | $30.3M | n/a | n/a |
| FY 2021 | 2021-12-31 | $294.0M | n/a | $24.7M | $47.8M | n/a | n/a |
Quarters are the three-month figures the company reports; a fourth quarter marked derived is the fiscal year less the three reported quarters, since companies report it only inside the 10-K. Fiscal years are the annual figures. Buybacks are cash paid to repurchase common stock in the year (XBRL PaymentsForRepurchaseOfCommonStock), not authorizations. Balance sheet lines are as of 2026-06-30; shares outstanding as of 2026-07-28 from the cover page.
What this page is
GLAUKOS Corp in the regulatory record
Regulators publish company data in separate files that never sit next to each other: FINRA's twice-monthly short interest, its daily short sale volume, the SEC's fails-to-deliver counts, and each insider's Form 4. A company page pulls every series the site collects for one ticker onto one URL, keyed by the SEC's own ticker list, so the short position, the daily flow, the settlement fails and what insiders are doing can be read together.
Each section has its own history table, a summary sentence built from the rows (last value, change, range with dates) and its own JSON and CSV links. Nothing on the page is written by a model; the sentences change only when the data does. A page exists only for companies with data in at least two series, and every section says when its source last updated.
This page follows GLAUKOS Corp (GKOS), SEC CIK 1192448, listed on NYSE, classified by the SEC as surgical & medical instruments & apparatus. The cross-market tables live on the short interest and insider transactions hubs.
Source and method
- Short interest
- FINRA consolidated short interestTwice a month, about eight business days after settlement. Latest 2026-08-31.JSON and CSV
- Daily short volume
- FINRA Reg SHO daily filesEvery trading day, loaded the following morning. Latest 2026-09-17.JSON and CSV
- Fails to deliver
- SEC fails-to-deliver dataTwice a month, a few weeks after the half month ends. Latest 2026-08-31.JSON and CSV
- Planned sales
- SEC EDGAR Form 144EDGAR read every 30 minutes; a notice is filed on or before the sell order. Latest 2026-09-16.JSON and CSV
- Large holders
- SEC EDGAR Schedule 13D and 13GEDGAR read every 30 minutes; 13D within five business days of crossing 5%, 13G on the passive schedule. Latest 2026-05-15.JSON and CSV
- 13F holders
- SEC EDGAR Form 13F-HRQuarterly, filed within 45 days of quarter end; 30 tracked managers. Latest 2026-06-30.JSON and CSV
- Financials
- SEC XBRL company factsRefreshed weekly from the SEC's structured data; values are as filed in the 10-Q and 10-K. Latest 2026-06-30.JSON and CSV
- Earnings dates
- SEC EDGAR 8-K Item 2.02 (full-text search)EDGAR full-text search read twice a day; the estimate is last year's date plus 52 weeks. Latest 2026-07-29.JSON and CSV
- Insider trades
- SEC EDGAR Form 4EDGAR read every 30 minutes; filings are due two business days after the trade. Latest 2026-09-16.JSON and CSV
- Company record
- EDGAR filing index for CIK 1192448Ticker, name and exchange from the SEC's company list, refreshed weekly.
- Rate limits
- 30 requests a minute without a key, 120 a minute with a key from a free account.
Data checks. Every dataset is checked against its source once a day. This dataset passed the last run, 18 Sep 05:40 UTC.
How to read it
- Read the position against the flow: rising short interest with a high daily short share is new shorting; rising short interest with a normal short share is old shorts holding on.
- Insider buys next to a crowded short are the combination that has historically preceded squeezes; insider sells next to a crowded short are common and mean little.
- Fails to deliver matter relative to the float, not in absolute shares; a million failed shares in a mega cap is noise.
Analysis of what the data shows, not advice. XOOMAR does not recommend buying, selling or holding anything.
Other companies the SEC classifies as surgical & medical instruments & apparatus
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- DXCMDEXCOM INC
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- SIBNSI-BONE, Inc.
- MMM3M CO
- LMATLEMAITRE VASCULAR INC
- INSPInspire Medical Systems, Inc.
- NVCRNovoCure Ltd
- RMDRESMED INC
- SYKSTRYKER CORP
- IRTCiRhythm Holdings, Inc.
- ICUIICU MEDICAL INC/DE
- ATECAlphatec Holdings, Inc.
- AORTARTIVION, INC.
- PODDINSULET CORP
- BDXBECTON DICKINSON & CO
- IRMDIRADIMED CORP
- ATRCAtriCure, Inc.
- UFPTUFP TECHNOLOGIES INC
- LUNGPulmonx Corp
- MMSIMERIT MEDICAL SYSTEMS INC
- ANGOANGIODYNAMICS INC
- OFIXOrthofix Medical Inc.
Datasets
Frequently Asked Questions
How much of GKOS is sold short?
What is GKOS's daily short volume?
Does GKOS have fails to deliver?
Are GKOS insiders buying or selling?
Have GKOS insiders filed to sell?
Who owns more than 5% of GKOS?
What did GKOS report last quarter?
Which funds hold GKOS?
Data on this page is provided for informational purposes only and is not financial advice. See our editorial policy.