Stock chart
Ticker: GKOS Exchange: NYS


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Purchase Sale Planned purchase Planned sale Net purchase Net sale Earnings
Earnings
 
Value bought

Past 90 days

 
Value sold

Past 90 days

 
Net insiders buying

Past 90 days

 
Trades (buy and sell)

Past 90 days

Abbreviations B: Buy, S: Sell, PP: Planned purchase, PS: Planned sale, O: Option / Other
Notification date Transaction date B/S Transaction type Insider and/or position Nb. shares
Price
Value
Number of shares Price Value Details
2025-03-27 2025-03-25 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
1,000 -0.1%
108.14
USD 3,352
1,000 -0.1% 108.14 USD 100,000
2025-03-27 2025-03-25 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
1,000 -0.8%
107.44
USD 46,199
1,000 -0.8% 107.44 USD 100,000
2025-03-27 2025-03-25 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
1,000 -1.9%
106.56
USD 112,847
1,000 -1.9% 106.56 USD 100,000
2025-02-28 2025-02-26 S Sale

Foley Mark J

Non-Executive Director
20,687 -27.6%
120.72
USD 2,497,335
20,687 -27.6% 120.72 USD 2,497,335
2025-02-19 2025-02-14 PS Planned sale

Navratil Tomas

CHIEF DEVELOPMENT OFFICER

Officer
3,416 -4.5%
147.14
USD 502,630
3,416 -4.5% 147.14 USD 502,630
2024-12-23 2024-12-20 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
1,292 -1.2%
150.35
USD 194,252
1,292 -1.2% 150.35 USD 194,252
2024-12-23 2024-12-20 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
2,036 -1.9%
149.54
USD 304,463
2,036 -1.9% 149.54 USD 304,463
2024-12-23 2024-12-20 PS Planned sale

Kliman Gilbert H

Non-Executive Director
10,000 -23.6%
150.28
USD 1,502,800
10,000 -23.6% 150.28 USD 1,502,800
2024-12-13 2024-12-11 S Sale

Kliman Gilbert H

Non-Executive Director
2,000 -5.8%
144.01
USD 288,020
2,000 -5.8% 144.01 USD 288,020
2024-11-01 2024-10-30 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
2,275 -2.2%
138.97
USD 316,157
2,275 -2.2% 138.97 USD 316,157
2024-09-11 2024-09-09 S Sale

Kliman Gilbert H

Non-Executive Director
1,000 -3.0%
130.00
USD 130,000
1,000 -3.0% 130.00 USD 130,000
2024-09-11 2024-09-09 S Sale

Kliman Gilbert H

Non-Executive Director
2,000 -5.7%
131.00
USD 262,000
2,000 -5.7% 131.00 USD 262,000
2024-08-23 2024-08-21 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
580 -0.6%
130.03
USD 75,417
580 -0.6% 130.03 USD 75,417
2024-08-23 2024-08-21 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
4,420 -4.1%
129.27
USD 571,373
4,420 -4.1% 129.27 USD 571,373
2024-08-19 2024-08-15 PS Planned sale

Stapley Marc

Non-Executive Director
581 -1.7%
126.91
USD 73,735
581 -1.7% 126.91 USD 73,735
2024-08-19 2024-08-15 PS Planned sale

Stapley Marc

Non-Executive Director
3,959 -10.3%
126.27
USD 499,903
3,959 -10.3% 126.27 USD 499,903
2024-08-19 2024-08-15 PS Planned sale

Stapley Marc

Non-Executive Director
1,110 -2.8%
125.28
USD 139,061
1,110 -2.8% 125.28 USD 139,061
2024-08-19 2024-08-15 PS Planned sale

Stapley Marc

Non-Executive Director
600 -1.5%
123.98
USD 74,388
600 -1.5% 123.98 USD 74,388
2024-08-12 2024-08-08 S Sale

WEISNER AIMEE S

Non-Executive Director
25,000 -45.4%
120.00
USD 3,000,000
25,000 -45.4% 120.00 USD 3,000,000
2024-07-09 2024-07-05 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
2,250 -2.2%
121.39
USD 273,128
2,250 -2.2% 121.39 USD 273,128
2024-06-05 2024-06-03 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
190 -0.2%
114.73
USD 21,799
190 -0.2% 114.73 USD 21,799
2024-06-05 2024-06-03 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
936 -0.9%
114.22
USD 106,910
936 -0.9% 114.22 USD 106,910
2024-06-05 2024-06-03 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
1,374 -1.3%
112.84
USD 155,042
1,374 -1.3% 112.84 USD 155,042
2024-06-03 2024-05-30 S Sale

Kliman Gilbert H

Non-Executive Director
5,000 -14.0%
112.00
USD 560,000
5,000 -14.0% 112.00 USD 560,000
2024-05-16 2024-05-15 PS Planned sale

Stapley Marc

Non-Executive Director
2,000 -5.8%
113.68
USD 227,360
2,000 -5.8% 113.68 USD 227,360
2024-05-16 2024-05-15 PS Planned sale

Stapley Marc

Non-Executive Director
2,200 -6.0%
112.91
USD 248,402
2,200 -6.0% 112.91 USD 248,402
2024-05-16 2024-05-15 PS Planned sale

Stapley Marc

Non-Executive Director
2,050 -5.3%
111.82
USD 229,231
2,050 -5.3% 111.82 USD 229,231
2024-05-14 2024-05-10 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
37 -0.1%
111.22
USD 4,115
37 -0.1% 111.22 USD 4,115
2024-05-14 2024-05-10 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
316 -0.6%
110.43
USD 34,896
316 -0.6% 110.43 USD 34,896
2024-05-14 2024-05-10 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
2,395 -2.3%
110.56
USD 264,791
2,395 -2.3% 110.56 USD 264,791
2024-05-08 2024-05-06 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
105 -0.1%
110.36
USD 11,588
105 -0.1% 110.36 USD 11,588
2024-05-08 2024-05-06 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
90 -0.2%
110.26
USD 9,923
90 -0.2% 110.26 USD 9,923
2024-05-06 2024-05-02 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
42 -0.1%
107.77
USD 4,526
42 -0.1% 107.77 USD 4,526
2024-05-06 2024-05-02 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
65 -0.1%
106.58
USD 6,928
65 -0.1% 106.58 USD 6,928
2024-05-06 2024-05-02 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
335 -0.6%
105.25
USD 35,259
335 -0.6% 105.25 USD 35,259
2024-05-06 2024-05-02 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
165 -0.2%
107.58
USD 17,751
165 -0.2% 107.58 USD 17,751
2024-05-06 2024-05-02 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
577 -0.6%
106.39
USD 61,387
577 -0.6% 106.39 USD 61,387
2024-05-06 2024-05-02 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
672 -0.7%
105.31
USD 70,768
672 -0.7% 105.31 USD 70,768
2024-05-06 2024-05-02 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
645 -0.6%
104.43
USD 67,357
645 -0.6% 104.43 USD 67,357
2024-04-10 2024-04-08 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
86 -0.1%
102.13
USD 8,783
86 -0.1% 102.13 USD 8,783
2024-04-10 2024-04-08 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
8,191 -7.4%
101.28
USD 829,584
8,191 -7.4% 101.28 USD 829,584
2024-04-10 2024-04-08 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
41,068 -27.2%
100.52
USD 4,128,155
41,068 -27.2% 100.52 USD 4,128,155
2024-04-10 2024-04-08 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
10,456 -6.5%
99.64
USD 1,041,836
10,456 -6.5% 99.64 USD 1,041,836
2024-04-09 2024-04-08 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
1,227 -2.3%
100.46
USD 123,264
1,227 -2.3% 100.46 USD 123,264
2024-04-09 2024-04-08 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
145 -0.3%
101.24
USD 14,680
145 -0.3% 101.24 USD 14,680
2024-04-09 2024-04-05 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
2,457 -2.4%
96.81
USD 237,862
2,457 -2.4% 96.81 USD 237,862
2024-04-09 2024-04-05 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
27 -0.1%
97.40
USD 2,630
27 -0.1% 97.40 USD 2,630
2024-04-09 2024-04-05 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
217 -0.4%
96.62
USD 20,967
217 -0.4% 96.62 USD 20,967
2024-04-09 2024-04-05 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
18 -0.0%
95.55
USD 1,720
18 -0.0% 95.55 USD 1,720
2024-04-05 2024-04-04 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
158 -0.3%
95.16
USD 15,035
158 -0.3% 95.16 USD 15,035
2024-04-05 2024-04-04 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
276 -0.5%
95.42
USD 26,336
276 -0.5% 95.42 USD 26,336
2024-04-05 2024-04-04 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
200 -0.2%
96.57
USD 19,314
200 -0.2% 96.57 USD 19,314
2024-04-05 2024-04-03 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
316 -0.6%
94.62
USD 29,900
316 -0.6% 94.62 USD 29,900
2024-04-05 2024-04-03 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
200 -0.2%
96.61
USD 19,322
200 -0.2% 96.61 USD 19,322
2024-04-03 2024-04-02 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
1 -0.0%
92.74
USD 93
1 -0.0% 92.74 USD 93
2024-04-03 2024-04-02 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
81 -0.1%
91.74
USD 7,431
81 -0.1% 91.74 USD 7,431
2024-04-03 2024-04-02 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
178 -0.3%
90.76
USD 16,155
178 -0.3% 90.76 USD 16,155
2024-04-03 2024-04-02 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
170 -0.3%
89.71
USD 15,251
170 -0.3% 89.71 USD 15,251
2024-04-03 2024-04-02 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
44 -0.1%
88.76
USD 3,905
44 -0.1% 88.76 USD 3,905
2024-03-08 2024-03-07 S Sale

Kliman Gilbert H

Non-Executive Director
5,000 -14.0%
88.25
USD 441,250
5,000 -14.0% 88.25 USD 441,250
2024-03-08 2024-03-06 S Sale

Kliman Gilbert H

Non-Executive Director
5,202 -100.0%
84.93
USD 441,806
5,202 -100.0% 84.93 USD 441,806
2024-03-08 2024-03-06 S Sale

Kliman Gilbert H

Non-Executive Director
3,145 -37.7%
86.01
USD 270,501
3,145 -37.7% 86.01 USD 270,501
2024-03-04 2024-02-29 PS Planned sale

Stapley Marc

Non-Executive Director
2,313 -6.7%
91.21
USD 210,969
2,313 -6.7% 91.21 USD 210,969
2024-03-04 2024-02-29 PS Planned sale

Stapley Marc

Non-Executive Director
1,500 -4.1%
90.54
USD 135,810
1,500 -4.1% 90.54 USD 135,810
2024-03-04 2024-02-29 PS Planned sale

Stapley Marc

Non-Executive Director
2,437 -6.3%
88.76
USD 216,308
2,437 -6.3% 88.76 USD 216,308
2024-02-29 2024-02-27 S Sale

Kliman Gilbert H

Non-Executive Director
8,000 -48.9%
92.00
USD 736,000
8,000 -48.9% 92.00 USD 736,000
2024-02-27 2024-02-23 S Sale

Gilliam Joseph E

PRESIDENT & COO

Officer
4,092 -4.0%
93.05
USD 380,761
4,092 -4.0% 93.05 USD 380,761
2024-02-27 2024-02-23 S Sale

Gilliam Joseph E

PRESIDENT & COO

Officer
114,739 -52.8%
92.33
USD 10,593,852
114,739 -52.8% 92.33 USD 10,593,852
2024-02-27 2024-02-23 S Sale

Gilliam Joseph E

PRESIDENT & COO

Officer
21,414 -9.0%
90.94
USD 1,947,389
21,414 -9.0% 90.94 USD 1,947,389
2024-02-26 2024-02-23 S Sale

Foley Mark J

Non-Executive Director
4,560 -12.1%
92.87
USD 423,487
4,560 -12.1% 92.87 USD 423,487
2024-02-14 2024-02-12 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
1,512 -1.2%
96.80
USD 146,362
1,512 -1.2% 96.80 USD 146,362
2024-02-12 2024-02-09 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
631 -0.5%
96.70
USD 61,018
631 -0.5% 96.70 USD 61,018
2024-02-12 2024-02-08 PS Planned sale

Gilliam Joseph E

PRESIDENT & COO

Officer
5,000 -4.0%
96.07
USD 480,350
5,000 -4.0% 96.07 USD 480,350
2024-02-09 2024-02-08 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
181 -0.3%
96.06
USD 17,387
181 -0.3% 96.06 USD 17,387
2024-02-09 2024-02-08 PS Planned sale

Thurman Alex R.

SVP & CHIEF FINANCIAL OFFICER

Officer
369 -0.7%
95.65
USD 35,295
369 -0.7% 95.65 USD 35,295
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