Glaukos Corporation Insider Trading

GKOS

Last 12 months

Insiders sold $79.9M and bought nothing on the open market.

59% of the selling was scheduled in advance under 10b5-1 plans. President & COO Joseph E Gilliam sold $10.8M on Aug 11, 45% of their stake, outside a plan. The last open-market buy by an executive or director was in Nov 2017.

Net open-market

−$79.9M

0 buys · 32 sales

Under a 10b5-1 plan

59%

of the value sold

Insiders who bought / sold

0 / 8

executives and directors

Last open-market buy

Nov 2017

Nov 22, 2017

Get an email when GKOS's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Oct 30	Tomas Navratil Chief Development Officer	SoldNo plan 4 parts	44,436	$238.97 average	$10.6M	54%	Form 4
Oct 5	Tomas Navratil Chief Development Officer	Sold10b5-1 plan 3 parts	1,527	$164.45 average	251K	2.2%	Form 4
Sep 25	Tomas Navratil Chief Development Officer	Sold10b5-1 plan 4 parts	1,615	$154.28 average	249K	2.2%	Form 4
Sep 16	Tomas Navratil Chief Development Officer	Sold10b5-1 plan 7 parts	1,457	$166.92 average	243K	2.0%	Form 4
Aug 28	Tomas Navratil Chief Development Officer	SoldNo plan 3 parts	13,744	$180.67 average	$2.48M	16%	Form 4
Aug 19	Gilbert H Kliman Director	SoldNo plan	2,500	$190.00	475K	6.3%	Form 4
Aug 11	Joseph E Gilliam President & COO	SoldNo plan 2 parts	60,000	$179.74 average	$10.8M	45%	Form 4
Aug 7	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	20,000	$180.13	$3.6M	31%	Form 4
Jul 31	Leana Wen Director	SoldNo plan	525	$167.63	88K	2.4%	Form 4
Jul 16	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	10,000	$160.00	$1.6M	19%	Form 4
Jul 9	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	10,000	$155.00	$1.55M	19%	Form 4
Jul 6	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	10,000	$150.00	$1.5M	19%	Form 4
Jul 1	Tomas Navratil Chief Development Officer	Sold10b5-1 plan	716	$139.06	100K	0.8%	Form 4
Jun 16	Tomas Navratil Chief Development Officer	Sold10b5-1 plan	1,537	$130.68	201K	1.7%	Form 4
May 14	Gilbert H Kliman Director	SoldNo plan	5,000	$140.76	704K	12%	Form 4
May 11	Gilbert H Kliman Director	SoldNo plan	5,000	$135.00	675K	12%	Form 4
May 1	Leana Wen Director	SoldNo plan	1,700	$143.35	244K	7.9%	Form 4
May 1	Joseph E Gilliam President & COO	SoldNo plan	19,573	$143.54	$2.81M	21%	Form 4
Apr 30	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	10,000	$140.00	$1.4M	19%	Form 4
Apr 10	Tomas Navratil Chief Development Officer	Sold10b5-1 plan 4 parts	2,093	$117.62 average	246K	2.3%	Form 4
Mar 25	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	2,511	$106.46	267K	5.3%	Form 4
Mar 24	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	1,521	$105.24	160K	3.3%	Form 4
Mar 17	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	625	$99.15	62K	1.3%	Form 4
Mar 16	Tomas Navratil Chief Development Officer	Sold10b5-1 plan 3 parts	1,031	$98.04 average	101K	1.4%	Form 4
Feb 19	Aimee S Weisner Director	SoldNo plan 4 parts	15,000	$117.38 average	$1.76M	24%	Form 4
Jan 22	Joseph E Gilliam President & COO	Sold10b5-1 plan 4 parts	10,498	$127.68 average	$1.34M	10%	Form 4
Jan 22	Marc Stapley Director	Sold10b5-1 plan 5 parts	15,000	$127.71 average	$1.92M	29%	Form 4
Jan 21	Joseph E Gilliam President & COO	Sold10b5-1 plan	4,502	$124.65	561K	4.6%	Form 4
Jan 8 – 16	Thomas William Burns Chairman & CEO	Sold10b5-1 plan 2 parts	275,000	$115.00 average	$31.6M	15%	Form 4
Dec 9, 2025	Gilbert H Kliman Director	SoldNo plan	5,000	$107.27	536K	13%	Form 4
Nov 25, 2025	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan	315	$105.00	33K	0.6%	Form 4
Nov 18, 2025	Joseph E Gilliam President & COO	SoldNo plan	19,340	$90.00	$1.74M	17%	Form 4
Sep 22, 2025	Tomas Navratil Chief Development Officer	Sold10b5-1 plan 3 parts	517	$84.22 average	44K	0.7%	Form 4
Sep 11, 2025	Tomas Navratil Chief Development Officer	Sold10b5-1 plan 2 parts	5,142	$88.22 average	454K	6.4%	Form 4
Mar 25, 2025	Alex R. Thurman SVP & Chief Financial Officer	Sold10b5-1 plan 3 parts	1,520	$106.84 average	162K	2.8%	Form 4
Feb 26, 2025	Mark J Foley Director	SoldNo plan	20,687	$120.72	$2.5M	28%	Form 4
Feb 14, 2025	Tomas Navratil Chief Development Officer	Sold10b5-1 plan	3,416	$147.14	503K	4.5%	Form 4
Dec 20, 2024	Joseph E Gilliam President & COO	Sold10b5-1 plan 2 parts	3,328	$149.85 average	499K	3.2%	Form 4
Dec 20, 2024	Gilbert H Kliman Director	Sold10b5-1 plan	10,000	$150.28	$1.5M	24%	Form 4
Dec 11, 2024	Gilbert H Kliman Director	SoldNo plan	2,000	$144.01	288K	5.8%	Form 4

Oct 30No plan
Tomas Navratil
Chief Development Officer · sold 44,436 at avg $238.97
$10.6M
54% of stake
Oct 510b5-1 plan
Tomas Navratil
Chief Development Officer · sold 1,527 at avg $164.45
251K
2.2% of stake
Sep 2510b5-1 plan
Tomas Navratil
Chief Development Officer · sold 1,615 at avg $154.28
249K
2.2% of stake
Sep 1610b5-1 plan
Tomas Navratil
Chief Development Officer · sold 1,457 at avg $166.92
243K
2.0% of stake
Aug 28No plan
Tomas Navratil
Chief Development Officer · sold 13,744 at avg $180.67
$2.48M
16% of stake
Aug 19No plan
Gilbert H Kliman
Director · sold 2,500 at $190.00
475K
6.3% of stake
Aug 11No plan
Joseph E Gilliam
President & COO · sold 60,000 at avg $179.74
$10.8M
45% of stake
Aug 710b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 20,000 at $180.13
$3.6M
31% of stake
Jul 31No plan
Leana Wen
Director · sold 525 at $167.63
88K
2.4% of stake
Jul 1610b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 10,000 at $160.00
$1.6M
19% of stake
Jul 910b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 10,000 at $155.00
$1.55M
19% of stake
Jul 610b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 10,000 at $150.00
$1.5M
19% of stake
Jul 110b5-1 plan
Tomas Navratil
Chief Development Officer · sold 716 at $139.06
100K
0.8% of stake
Jun 1610b5-1 plan
Tomas Navratil
Chief Development Officer · sold 1,537 at $130.68
201K
1.7% of stake
May 14No plan
Gilbert H Kliman
Director · sold 5,000 at $140.76
704K
12% of stake
May 11No plan
Gilbert H Kliman
Director · sold 5,000 at $135.00
675K
12% of stake
May 1No plan
Leana Wen
Director · sold 1,700 at $143.35
244K
7.9% of stake
May 1No plan
Joseph E Gilliam
President & COO · sold 19,573 at $143.54
$2.81M
21% of stake
Apr 3010b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 10,000 at $140.00
$1.4M
19% of stake
Apr 1010b5-1 plan
Tomas Navratil
Chief Development Officer · sold 2,093 at avg $117.62
246K
2.3% of stake
Mar 2510b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 2,511 at $106.46
267K
5.3% of stake
Mar 2410b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 1,521 at $105.24
160K
3.3% of stake
Mar 1710b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 625 at $99.15
62K
1.3% of stake
Mar 1610b5-1 plan
Tomas Navratil
Chief Development Officer · sold 1,031 at avg $98.04
101K
1.4% of stake
Feb 19No plan
Aimee S Weisner
Director · sold 15,000 at avg $117.38
$1.76M
24% of stake
Jan 2210b5-1 plan
Joseph E Gilliam
President & COO · sold 10,498 at avg $127.68
$1.34M
10% of stake
Jan 2210b5-1 plan
Marc Stapley
Director · sold 15,000 at avg $127.71
$1.92M
29% of stake
Jan 2110b5-1 plan
Joseph E Gilliam
President & COO · sold 4,502 at $124.65
561K
4.6% of stake
Jan 8 – 1610b5-1 plan
Thomas William Burns
Chairman & CEO · sold 275,000 at avg $115.00
$31.6M
15% of stake
Dec 9, 2025No plan
Gilbert H Kliman
Director · sold 5,000 at $107.27
536K
13% of stake
Nov 25, 202510b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 315 at $105.00
33K
0.6% of stake
Nov 18, 2025No plan
Joseph E Gilliam
President & COO · sold 19,340 at $90.00
$1.74M
17% of stake
Sep 22, 202510b5-1 plan
Tomas Navratil
Chief Development Officer · sold 517 at avg $84.22
44K
0.7% of stake
Sep 11, 202510b5-1 plan
Tomas Navratil
Chief Development Officer · sold 5,142 at avg $88.22
454K
6.4% of stake
Mar 25, 202510b5-1 plan
Alex R. Thurman
SVP & Chief Financial Officer · sold 1,520 at avg $106.84
162K
2.8% of stake
Feb 26, 2025No plan
Mark J Foley
Director · sold 20,687 at $120.72
$2.5M
28% of stake
Feb 14, 202510b5-1 plan
Tomas Navratil
Chief Development Officer · sold 3,416 at $147.14
503K
4.5% of stake
Dec 20, 202410b5-1 plan
Joseph E Gilliam
President & COO · sold 3,328 at avg $149.85
499K
3.2% of stake
Dec 20, 202410b5-1 plan
Gilbert H Kliman
Director · sold 10,000 at $150.28
$1.5M
24% of stake
Dec 11, 2024No plan
Gilbert H Kliman
Director · sold 2,000 at $144.01
288K
5.8% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch GKOS, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Held by ETFs

GKOS is in 91 US ETFs. The largest of them, with GKOS's weight in each:

Spot a number that looks wrong? Check it in GKOS's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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