Insider trading

Period: 120 months Stock: GKOS Role: Other officers × + 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.

51 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.

51 decisions over 120 months Remove this filter
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.

51 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.

51 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.
51 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
51 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.

51 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
11 Aug 2026
Gilliam Joseph E PRESIDENT & COO
Sold at will 2×
$10.78M 60,000 at 179.74
45.3%
Not planned
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)
1 May 2026
Gilliam Joseph E PRESIDENT & COO
Sold at will
$2.81M 19,573 at 143.54
21.0%
Not planned
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)
16 Mar 2026
Navratil Tomas CHIEF DEVELOPMENT OFFICER
Sold at will 3×
$101.08K 1,031 at 98.04
1.4%
Not planned
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)
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)
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
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 2×
$498.72K 3,328 at 149.85
3.2%
Planned (10b5-1)
30 Oct 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$316.16K 2,275 at 138.97
2.2%
Planned (10b5-1)
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)
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)
10 May 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$264.79K 2,395 at 110.56
2.3%
Planned (10b5-1)
6 May 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$11.59K 105 at 110.36
0.1%
Planned (10b5-1)
2 May 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 4×
$217.26K 2,059 at 105.52
2.0%
Planned (10b5-1)
8 Apr 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 4×
$6.01M 59,801 at 100.47
37.0%
Planned (10b5-1)
5 Apr 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$237.86K 2,457 at 96.81
2.4%
Planned (10b5-1)
4 Apr 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$19.31K 200 at 96.57
0.2%
Planned (10b5-1)
3 Apr 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$19.32K 200 at 96.61
0.2%
Planned (10b5-1)
23 Feb 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 3×
$12.92M 140,245 at 92.14
58.8%
Sold half or more
12 Feb 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$146.36K 1,512 at 96.80
1.2%
Planned (10b5-1)
9 Feb 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$61.02K 631 at 96.70
0.5%
Planned (10b5-1)
8 Feb 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$480.35K 5,000 at 96.07
4.0%
Planned (10b5-1)
29 Jan 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$891.88K 9,476 at 94.12
7.3%
Planned (10b5-1)
22 Jan 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$49.26K 524 at 94.01
0.4%
Planned (10b5-1)
16 Jan 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$436.04K 4,890 at 89.17
3.9%
Planned (10b5-1)
12 Jan 2024
Gilliam Joseph E PRESIDENT & COO
Sold on a plan
$9.79K 110 at 89.01
0.1%
Planned (10b5-1)
21 Dec 2023
Gilliam Joseph E PRESIDENT & COO
Sold on a plan 3×
$2.12M 25,000 at 84.80
17.2%
Planned (10b5-1)
14 Jul 2023
Gilliam Joseph E PRESIDENT & COO
Sold at will
$3.30M 42,099 at 78.34
25.9%
Not planned
12 Jul 2023
Gilliam Joseph E PRESIDENT & COO
Sold at will
$197.34K 2,700 at 73.09
2.2%
Not planned
1 Feb 2021
Calcaterra Chris M. Chief Operating Officer
Sold, plan not stated 4×
$5.34M 60,417 at 88.38
26.9%
6 Mar 2019
Calcaterra Chris M. Chief Operating Officer
Sold, plan not stated 3×
$1.10M 16,604 at 66.29
10.0%
5 Mar 2019
Calcaterra Chris M. Chief Operating Officer
Sold, plan not stated 2×
$4.99M 73,396 at 68.01
30.6%
2 Aug 2018
Calcaterra Chris M. Chief Operating Officer
Sold, plan not stated 3×
$1.73M 38,983 at 44.44
14.0%
20 Jun 2018
Calcaterra Chris M. Chief Operating Officer
Sold, plan not stated
$108.75K 2,470 at 44.03
1.0%
19 Jun 2018
Calcaterra Chris M. Chief Operating Officer
Sold, plan not stated
$341.47K 7,759 at 44.01
3.1%
15 Jun 2018
Calcaterra Chris M. Chief Operating Officer
Sold, plan not stated
$386.01K 8,771 at 44.01
3.5%
13 Jan 2017
Calcaterra Chris M. Chief Commercial Officer
Sold, plan not stated
$149.03K 3,723 at 40.03
1.5%
12 Jan 2017
Calcaterra Chris M. Chief Commercial Officer
Sold, plan not stated
$576.52K 14,413 at 40.00
5.7%
9 Jan 2017
Calcaterra Chris M. Chief Commercial Officer
Sold, plan not stated
$760.40K 20,000 at 38.02
7.7%
24 Oct 2016
Calcaterra Chris M. Chief Commercial Officer
Sold, plan not stated
$720.20K 20,000 at 36.01
7.7%
Showing 1–50 of 51. Page 1 of 2 Older →