Insider trading

Period: 12 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.

13 decisions over 12 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.

13 decisions over 12 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.

13 decisions over 12 months
The trade

Minimum amount

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

13 decisions over 12 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.
13 decisions over 12 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
13 decisions over 12 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.

13 decisions over 12 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
Showing 1–13 of 13.