Insider trading

Period: 120 months Stock: GKOS + Add filter Clear all
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When

Period

How far back the list reaches. Filings arrive days after the trade, so the newest rows always lag a little.

188 decisions over 120 months
Who

Role

The position the person holds at the company, read from the title on the filing. A chief executive who is also a director counts as the chief executive.

188 decisions over 120 months
The trade

Type of trade

Purchases, sales, or cluster buys: companies where 3 or more insiders bought within 30 days. The number beside each is what that choice would give.

188 decisions over 120 months
The trade

Minimum amount

Hides rows under this value. The amount is the shares traded times the price on the filing.

188 decisions over 120 months
The trade

Plan

  • Discretionary: they chose to sell that week.
  • Scheduled: a 10b5-1 plan fixed the sale months in advance, so the timing says nothing about what they knew.
  • Not stated: filed before the SEC added the box in April 2023, which is most of the older half of this database.
188 decisions over 120 months
The trade

Share of their own holding

How much of what they already held the trade moved. Selling a tenth of a stake is not the same act as selling all of it.

At least
188 decisions over 120 months
Ownership

What the chief executive holds

The value of the chief executive’s stock measured against base salary. The salary comes from the company’s own proxy. Companies with no figure are in neither direction.

188 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
5 Oct 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan 3×
$251.12K 1,527 at 164.45
2.2%
Planned (10b5-1)
25 Sep 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan 4×
$249.16K 1,615 at 154.28
2.2%
Planned (10b5-1)
16 Sep 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan 7×
$243.20K 1,457 at 166.92
2.0%
Planned (10b5-1)
28 Aug 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold at will 3×
$2.48M 13,744 at 180.67
15.7%
Not planned
19 Aug 2026
Kliman Gilbert H Director
Sold at will
$475.00K 2,500 at 190.00
6.3%
Not planned
11 Aug 2026
Gilliam Joseph E PRESIDENT & COO
Sold at will 2×
$10.78M 60,000 at 179.74
45.3%
Not planned
7 Aug 2026
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$3.60M 20,000 at 180.13
31.3%
Planned (10b5-1)
31 Jul 2026
WEN LEANA Director
Sold at will
$88.01K 525 at 167.63
2.4%
Not planned
16 Jul 2026
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$1.60M 10,000 at 160.00
18.6%
Planned (10b5-1)
9 Jul 2026
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$1.55M 10,000 at 155.00
18.6%
Planned (10b5-1)
6 Jul 2026
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$1.50M 10,000 at 150.00
18.6%
Planned (10b5-1)
1 Jul 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan
$99.57K 716 at 139.06
0.8%
Planned (10b5-1)
16 Jun 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan
$200.86K 1,537 at 130.68
1.7%
Planned (10b5-1)
14 May 2026
Kliman Gilbert H Director
Sold at will
$703.80K 5,000 at 140.76
12.3%
Not planned
11 May 2026
Kliman Gilbert H Director
Sold at will
$675.00K 5,000 at 135.00
12.3%
Not planned
1 May 2026
Gilliam Joseph E PRESIDENT & COO
Sold at will
$2.81M 19,573 at 143.54
21.0%
Not planned
1 May 2026
WEN LEANA Director
Sold at will
$243.70K 1,700 at 143.35
7.9%
Not planned
30 Apr 2026
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$1.40M 10,000 at 140.00
18.6%
Planned (10b5-1)
10 Apr 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan 4×
$246.18K 2,093 at 117.62
2.3%
Planned (10b5-1)
25 Mar 2026
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$267.32K 2,511 at 106.46
5.6%
Planned (10b5-1)
24 Mar 2026
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$160.07K 1,521 at 105.24
3.2%
Planned (10b5-1)
17 Mar 2026
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$61.97K 625 at 99.15
1.3%
Planned (10b5-1)
16 Mar 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold at will 3×
$101.08K 1,031 at 98.04
1.4%
Not planned
19 Feb 2026
WEISNER AIMEE S Director
Sold at will 4×
$1.76M 15,000 at 117.38
44.4%
Not planned
22 Jan 2026
Stapley Marc Director
Sold on a plan 5×
$1.92M 15,000 at 127.71
28.6%
Planned (10b5-1)
22 Jan 2026
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 4×
$1.34M 10,498 at 127.68
10.2%
Planned (10b5-1)
21 Jan 2026
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$561.17K 4,502 at 124.65
4.6%
Planned (10b5-1)
16 Jan 2026
Burns Thomas William CHAIRMAN & CEO
Sold on a plan
$21.50M 186,945 at 115.00
54.9%
Sold half or more
8 Jan 2026
Burns Thomas William CHAIRMAN & CEO
Sold on a plan
$10.13M 88,055 at 115.00
36.4%
Planned (10b5-1)
9 Dec 2025
Kliman Gilbert H Director
Sold at will
$536.35K 5,000 at 107.27
12.5%
Not planned
25 Nov 2025
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan
$33.08K 315 at 105.00
0.6%
Planned (10b5-1)
18 Nov 2025
Gilliam Joseph E PRESIDENT & COO
Sold at will
$1.74M 19,340 at 90.00
17.3%
Not planned
22 Sep 2025
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan 3×
$43.54K 517 at 84.22
0.7%
Planned (10b5-1)
11 Sep 2025
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan 2×
$453.62K 5,142 at 88.22
6.4%
Planned (10b5-1)
25 Mar 2025
Thurman Alex R. SVP & CHIEF FINANCIAL OFFICER
Sold on a plan 3×
$162.40K 1,520 at 106.84
2.8%
Planned (10b5-1)
26 Feb 2025
Foley Mark J Director
Sold at will
$2.50M 20,687 at 120.72
27.6%
Not planned
14 Feb 2025
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold on a plan
$502.63K 3,416 at 147.14
4.5%
Planned (10b5-1)
20 Dec 2024
Kliman Gilbert H Director
Sold on a plan
$1.50M 10,000 at 150.28
23.6%
Planned (10b5-1)
20 Dec 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 2×
$498.72K 3,328 at 149.85
3.2%
Planned (10b5-1)
11 Dec 2024
Kliman Gilbert H Director
Sold at will
$288.02K 2,000 at 144.01
5.8%
Not planned
30 Oct 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$316.16K 2,275 at 138.97
2.2%
Planned (10b5-1)
9 Sep 2024
Kliman Gilbert H Director
Sold at will 2×
$392.00K 3,000 at 130.67
8.5%
Not planned
21 Aug 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 2×
$646.79K 5,000 at 129.36
4.7%
Planned (10b5-1)
15 Aug 2024
Stapley Marc Director
Sold on a plan 4×
$787.09K 6,250 at 125.93
15.5%
Planned (10b5-1)
8 Aug 2024
WEISNER AIMEE S Director
Sold at will
$3.00M 25,000 at 120.00
45.4%
Not planned
5 Jul 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$273.13K 2,250 at 121.39
2.2%
Planned (10b5-1)
3 Jun 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 3×
$283.75K 2,500 at 113.50
2.4%
Planned (10b5-1)
30 May 2024
Kliman Gilbert H Director
Sold at will
$560.00K 5,000 at 112.00
14.0%
Not planned
15 May 2024
Stapley Marc Director
Sold on a plan 3×
$704.99K 6,250 at 112.80
16.2%
Planned (10b5-1)
10 May 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$264.79K 2,395 at 110.56
2.3%
Planned (10b5-1)
Showing 1–50 of 188. Page 1 of 4 Older →