Latest filingSep 01, 2026Most recent Form 4
GKOS
GLAUKOS Corp
NYSEHealthcareSurgical & Medical Instruments & Apparatus
Insider activity for last month from 08/03 to 09/03. Counts use processed Form 4 rows. Purchase and sale metrics use codes P and S; totals remain unknown when any matching value is missing. Rows without a usable transaction date cannot be assigned to a rolling period and are excluded.
Total buying$00 buys
Total selling$295M4 sells
Net open-market-$295M2 insiders
Open-market mix
Buy vs sell distribution by transaction countInsider activity report
Monthly open-market purchase and sale counts Buys Sells
Transaction codes
By Form 4 transaction code in selected period6transactions
- S · Open-market sells · dominant4 · 67%
- M · Option exercise2 · 33%
Activity by reported role
A joint filing can contribute to multiple roles6transactions
- CDO · dominant3 · 50%
- Director3 · 50%
Distinct insiders active
Reporting-owner CIKs by month · peak Aug 2026 (2)Aug 2026Sep 2026
Reported Holdings After
Separated by insider, security, and ownership typeNavratil TomasCommon Stock · Direct
79,991Aug 28, 2026
Kliman Gilbert HCommon Stock · Direct
37,406Aug 19, 2026
Kliman Gilbert HStock Option (Right to Buy) · Direct
12,500Aug 19, 2026
These are reported post-transaction holdings, not company-wide ownership percentages. Securities, indirect vehicles, and amendments are kept separate.
Filing activity heatmap
Each cell is one day · intensity = transactions · buys green, sells redAug 03 → Sep 03
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Top insiders
By absolute net value across the selected period- NT-$2.5M
- KH-$410.6k
Filing detail checks
Secondary metrics for the selected periodFiling-only signals
Deterministic matches in the selected period
GKOS transaction history
Filters apply within this company and selected period by default| Ticker | Insider | Role | Type | Shares | Value | Code | Signals | 90d return | Filed | Trans date |
|---|---|---|---|---|---|---|---|---|---|---|
| GKOS | Navratil Tomas | CDO | sale | 10 | -$182k | S | 0.0% | 09/01 | 08/28 | |
| GKOS | Navratil Tomas | CDO | sale | 6.09k | -$110M | S | 0.0% | 09/01 | 08/28 | |
| GKOS | Navratil Tomas | CDO | sale | 7.64k | -$137M | S | 0.0% | 09/01 | 08/28 | |
| GKOS | Kliman Gilbert H | DIR | exercise | 2.50k | $0 | M | −4.4% | 08/21 | 08/19 | |
| GKOS | Kliman Gilbert H | DIR | sale | 2.50k | -$47.5M | S | −4.4% | 08/21 | 08/19 | |
| GKOS | Kliman Gilbert H | DIR | exercise | 2.50k | $6.44M | M | −4.4% | 08/21 | 08/19 |
GLAUKOS Corp Insider Activity FAQ
SEC Form 4 contextWho recently reported transactions at GLAUKOS Corp?
Navratil Tomas, Kliman Gilbert H.
When was the latest reported open-market purchase?
No code-P purchase is available for this period.
When was the latest reported open-market sale?
Navratil Tomas reported a sale on Aug 28, 2026 valued at $182k. Read the SEC filing.
What is the recent purchase and sale balance?
Net open-market selling in the selected period was $2,958,104.04. Sales can occur for many non-investment reasons.
Where can I see the original SEC filing?
Every transaction row and latest-activity fact links to its original SEC filing.
What do these Form 4 transaction codes mean?
P and S generally describe open-market or private purchases and sales. A, D, F, M, X, G, J, and V describe awards, issuer dispositions, tax withholding, exercises, gifts, other transactions, and voluntary early reports; review each filing and its footnotes for context.