GKOS insider ownership: who sold, why, and what they still hold

What stands out

Four insiders sold $22.0M with no disclosed plan: Joseph Gilliam ($15.3M), Tomas Navratil ($2.5M) and Gilbert Kliman ($2.4M), plus 1 more. The filings don't state a reason.Joseph Gilliam: largest such sale, Aug 11, 2026 · Tomas Navratil: largest such sale, Aug 28, 2026 · Gilbert Kliman: largest such sale, May 14, 2026

A share of stake is shown for 0 of the 8 officers and directors who sold. 11 are left out

Left out: Thomas Burns, David Hoffmeister, Mark Foley, Joseph Gilliam, Aimee Weisner, Alex Thurman, Tomas Navratil, Marc Stapley, Gilbert Kliman, Denice Torres and Leana Wen (share of stake is being verified).

Disclosed company stock is not an insider's whole wealth.

Who sold, and how much of their stake

Officers and directors, past 12 months. Their share of stake is being verified and is not shown yet; amounts and trading plans are below.

Thomas Burns

Chairman & CEO, Director

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$31.6MDisclosed plan

Joseph Gilliam

President & COO

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$17.2M11% planned 89% no plan disclosed

Alex Thurman

SVP & Chief Financial Officer

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$10.2MDisclosed plan

Tomas Navratil

Chief Development Officer

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$3.9M36% planned 64% no plan disclosed

Gilbert Kliman

Director

Not confirmed

Share of stake not shown: share of stake is being verified. Why

$2.4MNo plan disclosed

All 8 sellers

Selling by month

Officers and directors, Oct 2025 to Oct 2026. Each sale is counted once: under a disclosed plan, else to cover taxes, else no plan disclosed.

Disclosed planNo plan disclosedOne dollar scale for every month; the tallest bar is labeled

Recent activity

Past 30 days, Sep 14, 2026 to Oct 13, 2026

Oct 5, 2026Tomas Navratil sold 1.5K shares ($251K) under a disclosed trading plan.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Tomas Navratil Chief Development Officer	1,527	$164.45	n/a	n/a	Oct 5, 2026	Oct 7, 2026

Sep 25, 2026Tomas Navratil sold 1.6K shares ($249K) under a disclosed trading plan.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Tomas Navratil Chief Development Officer	1,615	$154.28	n/a	n/a	Sep 25, 2026	Sep 28, 2026

Sep 16, 2026Tomas Navratil sold 1.5K shares ($243K) under a disclosed trading plan.

Who	Shares	Price	% of total stake	Total stake after	Trade date	Filed
Tomas Navratil Chief Development Officer	1,457	$166.92	n/a	n/a	Sep 16, 2026	Sep 18, 2026

"% of total stake" is the shares in an event against all the vested shares the person held that day, across every share class and holding entity, after that day's vesting. "n/a" means the person's holdings are not confirmed, or the row is a purchase. "Holdings record incomplete" means more shares were sold than the filings show the person held that day, so a percentage would be wrong.

Outside holders, reported separately

Gilbert Kliman reported no open-market sales in the past 12 months. Large shareholders and the funds or companies that board members represent are not part of management, so they are left out of the figures above.

Details

Common questions

Is the GLAUKOS Corp CEO selling stock?

Yes. Thomas Burns sold 275K shares ($31.6M) in the past 12 months, all of it under a trading plan disclosed in the filings.

Why are GLAUKOS Corp insiders selling?

Filings rarely give a reason, and we don't guess at one. What they show is how the sales were made: 68% of sales by value ran under 10b5-1 trading plans disclosed in the filings and 32% had no disclosed plan. A trading plan schedules sales in advance.

Are any GLAUKOS Corp insiders buying?

No. Officers and directors reported no purchases in the past 12 months.

The evidence

Who sold8 officers and directors: amount, % of holdings, trading plan

Who sold	Amount	% of holdings	Trading plan
Thomas Burns Chairman & CEO, Director	$31.6M 275K shares	Not confirmed share of stake is being verified. Why	Disclosed plan
Joseph Gilliam President & COO	$17.2M 114K shares	Not confirmed share of stake is being verified. Why	11% under a disclosed plan 89% no plan disclosed
Alex Thurman SVP & Chief Financial Officer	$10.2M 65K shares	Not confirmed share of stake is being verified. Why	Disclosed plan
Tomas Navratil Chief Development Officer	$3.9M 24K shares	Not confirmed share of stake is being verified. Why	36% under a disclosed plan 64% no plan disclosed
Gilbert Kliman Director	$2.4M 18K shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Marc Stapley Director	$1.9M 15K shares	Not confirmed share of stake is being verified. Why	Disclosed plan
Aimee Weisner Director	$1.8M 15K shares	Not confirmed share of stake is being verified. Why	No plan disclosed
Leana Wen Director	$332K 2.2K shares	Not confirmed share of stake is being verified. Why	No plan disclosed

Board members representing outside shareholders, reported separately: Gilbert Kliman. Details

The full ownership picture0 of 11 officers and directors confirmed

Vested shares across all share classes, held directly and through trusts, LLCs and family members, as reported on SEC Forms 3, 4 and 5. Unvested awards and options are never counted as owned shares.

Insider

Held Oct 13, 2025

Sold

Held Oct 13, 2026

Still held

Thomas Burns

Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Thomas Burns are complete.

Chairman & CEO, Director

n/a

−275K

n/a

Vesting, gifts, unvested awards and holding lines for Thomas Burns

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Thomas Burns are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

−31Kwithheld by the company for taxes

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
48,392	$55.18	Mar 24, 2032	$5.3M
56,404	$49.51	Apr 3, 2033	$6.5M
36,891	$85.78	Mar 14, 2034	$2.9M
37,359	$85.78	Mar 14, 2034	$3.0M
77,848	$55.18	Mar 24, 2032	$8.6M
24,102	$96.60	Mar 13, 2035	$1.7M
105,195	$55.18	Mar 24, 2032	$11.6M
100,000	$30.92	Mar 14, 2028	$13.5M
110,254	$48.46	Mar 22, 2033	$12.9M
98,474	$109.60	Mar 25, 2036	$5.5M

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

David Hoffmeister

Director

n/a

Vesting, gifts, unvested awards and holding lines for David Hoffmeister

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for David Hoffmeister are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
1,246	$110.70	May 30, 2034	$68K
3,149	$94.87	May 29, 2035	$223K
2,987	$106.52	May 28, 2036	$176K

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Mark Foley

Director

n/a

Vesting, gifts, unvested awards and holding lines for Mark Foley

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Mark Foley are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
1,246	$110.70	May 30, 2034	$68K
3,149	$94.87	May 29, 2035	$223K
2,987	$106.52	May 28, 2036	$176K

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Joseph Gilliam

President & COO

n/a

−114K

n/a

Vesting, gifts, unvested awards and holding lines for Joseph Gilliam

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Joseph Gilliam are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

−24Kwithheld by the company for taxes

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
25,466	$39.10	Mar 12, 2030	$3.2M
26,751	$48.46	Mar 22, 2033	$3.1M
92,044	$41.69	May 5, 2027	$11.4M
13,437	$30.92	Mar 14, 2028	$1.8M
39,936	$55.18	Mar 24, 2032	$4.4M
43,929	$41.69	May 5, 2027	$5.4M
15,161	$85.78	Mar 14, 2034	$1.2M
15,353	$85.78	Mar 14, 2034	$1.2M
52,668	$55.18	Mar 24, 2032	$5.8M
51,475	$55.18	Mar 24, 2032	$5.7M
431	$69.30	Mar 14, 2029	$42K
26,751	$48.46	Mar 14, 2033	$3.1M
33,118	$55.18	Mar 24, 2032	$3.7M

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Aimee Weisner

Director

n/a

−15K

n/a

Vesting, gifts, unvested awards and holding lines for Aimee Weisner

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Aimee Weisner are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
1,246	$110.70	May 30, 2034	$68K
3,149	$94.87	May 29, 2035	$223K
2,987	$106.52	May 28, 2036	$176K

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Alex Thurman

SVP & Chief Financial Officer

n/a

−65K

n/a

Vesting, gifts, unvested awards and holding lines for Alex Thurman

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Alex Thurman are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

−5.5Kwithheld by the company for taxes

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
10,000	$38.68	Oct 6, 2026	$1.3M
21,042	$55.18	Mar 24, 2033	$2.3M
8,906	$49.51	Apr 3, 2033	$1.0M
8,591	$85.78	Mar 14, 2034	$686K
8,700	$85.78	Mar 14, 2034	$694K
33,852	$55.18	Mar 24, 2032	$3.7M
19,849	$96.60	Mar 13, 2035	$1.4M
19,601	$48.46	Mar 25, 2036	$2.3M
45,738	$55.18	Mar 24, 2032	$5.1M
20,515	$109.60	Mar 25, 2036	$1.1M
10,000	$38.68	Oct 6, 2026	$1.3M

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Tomas Navratil

Chief Development Officer

n/a

−24K

n/a

Vesting, gifts, unvested awards and holding lines for Tomas Navratil

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Tomas Navratil are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

−18Kwithheld by the company for taxes

Marc Stapley

Director

n/a

−15K

n/a

Vesting, gifts, unvested awards and holding lines for Marc Stapley

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Marc Stapley are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
1,246	$110.70	May 30, 2034	$68K
3,149	$94.87	May 29, 2035	$223K
2,987	$106.52	May 28, 2036	$176K

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Gilbert Kliman

Director

n/a

−18K

n/a

Vesting, gifts, unvested awards and holding lines for Gilbert Kliman

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Gilbert Kliman are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
12,500	$25.77	Dec 13, 2027	$1.7M
1,246	$110.70	May 30, 2034	$68K
3,149	$94.87	May 29, 2035	$223K
2,987	$106.52	May 28, 2036	$176K

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Denice Torres

Director

n/a

Vesting, gifts, unvested awards and holding lines for Denice Torres

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Denice Torres are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
1,246	$110.70	May 30, 2034	$68K
3,149	$94.87	May 29, 2035	$223K
2,987	$106.52	May 28, 2036	$176K

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Leana Wen

Director

n/a

−2.2K

n/a

Vesting, gifts, unvested awards and holding lines for Leana Wen

Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Leana Wen are complete; balances and unit counts will be added when the check is finished.

0gifted (net of own trusts)

Stock options (not counted as shares):

Options held	Strike price	Expires	Intrinsic value (estimate)
1,246	$110.70	May 30, 2034	$68K
3,149	$94.87	May 29, 2035	$223K
2,987	$106.52	May 28, 2036	$176K

Estimate: options held × ($165.60 − strike price), using the most recent insider trade price on Form 4 (Oct 5, 2026), not a market close.

Holdings and share of stake for GLAUKOS Corp are being verified, so no balances, unit counts or percentages are shown. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings.

What explains the selling$69.3M of sales by plan status, purpose, seller and month

Officer and director open-market sales: $69.3M across 527,330 shares. Plan status and stated purpose are separate questions, and a sale can have both.

By plan status

Disclosed plan · $47.0M · 68%

32%

The lighter segment is sales with no plan disclosed in the filing ($22.3M), including tax-related sales outside a plan.

No plan disclosed · $22.3M

Sales with no 10b5-1 plan and no tax reference in the filing. $15.3M of it is Joseph Gilliam. No plan disclosed is a statement about the filing, not about why the sale happened. Largest such sale: Joseph Gilliam, Aug 11, 2026

Taxes

78,243 shares ($8.6M) were withheld by the company for taxes, which isn't a market sale.

Seller	Shares sold	Proceeds	Under a disclosed plan	Share of total	Sales dates
Thomas Burns Chairman & CEO, Director	275K	$31.6M	100%	46%	Jan 8, 2026 to Jan 16, 2026
Joseph Gilliam President & COO	114K	$17.2M	11%	25%	Nov 18, 2025 to Aug 11, 2026
Alex Thurman SVP & Chief Financial Officer	65K	$10.2M	100%	15%	Nov 25, 2025 to Aug 7, 2026
Tomas Navratil Chief Development Officer	24K	$3.9M	36%	6%	Mar 16, 2026 to Oct 5, 2026
Gilbert Kliman Director	18K	$2.4M	0%	3%	Dec 9, 2025 to Aug 19, 2026
Marc Stapley Director	15K	$1.9M	100%	3%	Jan 22, 2026 to Jan 22, 2026
Aimee Weisner Director	15K	$1.8M	0%	3%	Feb 19, 2026 to Feb 19, 2026
Leana Wen Director	2.2K	$332K	0%	0.5%	May 1, 2026 to Jul 31, 2026

Sales by month

Month	Sale proceeds	Disclosed plan	To cover taxes	No plan disclosed
Oct 2025	$0	$0	$0	$0
Nov 2025	$1.8M	$33K	$0	$1.7M
Dec 2025	$536K	$0	$0	$536K
Jan 2026	$35.4M	$35.4M	$0	$0
Feb 2026	$1.8M	$0	$0	$1.8M
Mar 2026	$590K	$590K	$0	$0
Apr 2026	$1.6M	$1.6M	$0	$0
May 2026	$4.4M	$0	$0	$4.4M
Jun 2026	$201K	$201K	$0	$0
Jul 2026	$4.8M	$4.7M	$0	$88K
Aug 2026	$17.3M	$3.6M	$0	$13.7M
Sep 2026	$492K	$492K	$0	$0
Oct 2026	$251K	$251K	$0	$0

Board members representing outside shareholders (1)Listed and sourced; not part of the management totals or the answer line

Directors whose reported holdings sit mostly in an investment fund or a corporate shareholder they represent, not in their own name, with beneficial ownership disclaimed except for their own financial interest. Listed and sourced here; not part of the management totals or the answer line. Shares a fund hands to its own investors are distributions, not sales.

Board member	Held Oct 13, 2025	Sold	Held Oct 13, 2026	Still held
Gilbert Kliman ! Holdings and share of stake are being verified. Share-of-stake figures and holdings for this company are held back while they are verified. Sales and other transactions for Gilbert Kliman are complete. Director	n/a	0	n/a	n/a
Vesting, gifts, unvested awards and holding lines for Gilbert Kliman Holdings and share of stake are being verified. Sales, proceeds, plan and tax status and dates for Gilbert Kliman are complete; balances and unit counts will be added when the check is finished. 0gifted (net of own trusts)

Is this normal? Selling year by year5 earlier years to compare with

More than usual: about 2.3x the 5-year average. 8 insiders sold; the average is 4 a year.

12 months ending	Shares sold	Insiders who sold	Proceeds
Oct 13, 2026 Latest 12 months	527K	8	$69.3M
Oct 13, 2025 1 year earlier	49K	5	$6.3M
Oct 13, 2024 2 years earlier	690K	7	$61.5M
Oct 14, 2023 3 years earlier	250K	3	$18.0M
Oct 14, 2022 4 years earlier	0	0	$0
Oct 14, 2021 5 years earlier	154K	3	$12.8M

Open-market sales (Form 4 code S) by people who were officers or directors, in split-adjusted shares. Earlier years include people who have since left. A sale that an outside holder also reports (a family trust, a fund) is counted with outside holders in every year. Shares, not dollars, are compared, so a change in the stock price doesn't look like a change in selling. Years the filings don't fully cover are shown but left out of the average.

Known gaps and uncertainty11 officers and directors not confirmed

Holdings and share of stake are being verified. Balances, unit counts and every share-of-stake figure for GLAUKOS Corp are held back until that check is finished. Sales, proceeds, plan and tax status, titles and dates come straight from individual filings and are complete.

External context: we only cite outside events when a documented connection exists. None is shown for this period.

Sources and methodology571 filings on record, 84 filed in the 12-month period, and how we read them

All 571 Forms 3, 4 and 5 on record for GLAUKOS Corp (SEC CIK 1192448), filed from Jun 24, 2015 to Oct 7, 2026; 84 of them were filed in the 12 months this page covers, retrieved from SEC EDGAR on Oct 13, 2026. Prices are the ones reported in each filing, often weighted averages.

Holdings. Each holding line (a share class plus an owner, such as a trust or LLC) carries its last reported balance forward. Entities first reported during the period start at zero, so transfers between an insider's own trusts don't count as selling. Lines not reported for three years or more are listed separately and left out of totals.

Sales. A sale counts as under a 10b5-1 plan if its footnote cites one or the filing's Rule 10b5-1 box is checked, and as tax-related if its footnote cites tax obligations or sell-to-cover. Shares withheld by the company for taxes are listed separately. Sales with neither attribute are labeled "no plan disclosed".

Full methodology

Former or inactive filers (16)No filing in 18 months; last reported balances, not in any total

Name	Last filed	Last reported balance
Chris Calcaterra	Mar 28, 2022	159,807 shares, last reported balance as of Mar 24, 2022
William Link	Jun 7, 2021	102,722 shares, last reported balance as of Jun 3, 2021
William Link	Jun 7, 2021	5,425,016 shares, last reported balance as of May 31, 2016
ORBIMED ADVISORS LLC	Mar 6, 2018	2,897,937 shares, last reported balance as of Jun 30, 2015
Jonathan Silverstein	Mar 6, 2018	No balance on record
Jonathan Silverstein	Mar 6, 2018	2,897,937 shares, last reported balance as of Jun 30, 2015
Richard Harrison	Jan 13, 2017	207,388 shares, last reported balance as of Jan 13, 2017
VERSANT VENTURES I LLC	Jun 2, 2016	5,606,904 shares, last reported balance as of May 31, 2016
MONTREUX EQUITY PARTNERS IV LP	Feb 26, 2016	3,371,218 shares, last reported balance as of Feb 25, 2016
Olav Bergheim	Jul 24, 2015	352,800 shares, last reported balance as of Jun 24, 2015
Domain Partners VIII, L.P.	Jul 1, 2015	876,083 shares, last reported balance as of Jun 30, 2015
Frazier Healthcare V, LP	Jun 30, 2015	2,603,362 shares, last reported balance as of Jun 30, 2015
InterWest Management Partners IX, LLC	Jun 30, 2015	2,603,362 shares, last reported balance as of Jun 30, 2015
Meritech Capital Associates III L.L.C.	Jun 30, 2015	3,026,678 shares, last reported balance as of Jun 30, 2015
Robert More	Jun 30, 2015	5,000 shares, last reported balance as of Jun 24, 2015
Paul Madera	Jun 30, 2015	3,026,678 shares, last reported balance as of Jun 30, 2015

Spotted something wrong on this page? Report an error. We check every report against the SEC filing and list what we fix in the corrections log.

GLAUKOS Corp insiders sold $69.3M in the past 12 months. How much of their stake is that?

What stands out

Who sold, and how much of their stake

Selling by month

Recent activity

Outside holders, reported separately

Common questions

Is the GLAUKOS Corp CEO selling stock?

Why are GLAUKOS Corp insiders selling?

Are any GLAUKOS Corp insiders buying?

The evidence

No plan disclosed · $22.3M

Taxes

Sales by month