Insider trading

Period: 120 months Stock: GTLB Role: Directors × + 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.

71 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.

71 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.

71 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.

71 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.
71 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
71 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.

71 decisions over 120 months
Stock
Insider
Type ?
Why it stands out
28 Sep 2026
Sijbrandij Sytse Director · indirect
Sold on a plan 3×
$19.71M 430,000 at 45.84
3.3%
Planned (10b5-1)
25 Sep 2026
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$33.69M 705,490 at 47.75
5.1%
Planned (10b5-1)
24 Sep 2026
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$47.69M 980,710 at 48.63
6.6%
Planned (10b5-1)
15 Jun 2026
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$3.30M 116,200 at 28.44
0.8%
Planned (10b5-1)
18 May 2026
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$2.89M 116,200 at 24.85
0.8%
Planned (10b5-1)
15 Apr 2026
Sijbrandij Sytse Director · indirect
Sold on a plan
$2.41M 116,200 at 20.77
100%
Sold half or more
27 Mar 2026
BOSTROM SUSAN L Director
Sold at will 2×
$661.70K 32,500 at 20.36
65.2%
Sold half or more
20 Mar 2026
Jacobson Matthew Director · indirect
Sold at will 8×
$10.28M 459,799 at 22.37
100%
Sold half or more
19 Mar 2026
Jacobson Matthew Director · indirect
Sold at will 8×
$16.07M 700,109 at 22.95
100.0%
Sold half or more
17 Feb 2026
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$1.54M 54,300 at 28.41
100%
Sold half or more
14 Jan 2026
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$1.95M 54,300 at 35.96
100%
Sold half or more
19 Dec 2025
Jacobson Matthew Director · indirect
Sold at will
$12.75M 334,827 at 38.08
100%
Sold half or more
15 Dec 2025
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$2.11M 54,300 at 38.95
100%
Sold half or more
9 Dec 2025
BOSTROM SUSAN L Director
Sold at will
$1.18M 30,000 at 39.25
37.6%
Not planned
8 Dec 2025
BOSTROM SUSAN L Director
Sold at will 5×
$2.77M 70,000 at 39.55
46.7%
Not planned
17 Nov 2025
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$4.69M 108,600 at 43.17
100%
Sold half or more
15 Oct 2025
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$4.81M 108,600 at 44.29
100%
Sold half or more
15 Oct 2025
BLASING KAREN Director
Sold on a plan
$147.10K 3,250 at 45.26
3.2%
Planned (10b5-1)
23 Sep 2025
Jacobson Matthew Director · indirect
Sold at will 4×
$3.19M 63,587 at 50.16
98.7%
Sold half or more
19 Sep 2025
Jacobson Matthew Director · indirect
Sold at will 4×
$11.71M 233,382 at 50.17
94.3%
Sold half or more
18 Sep 2025
Jacobson Matthew Director · indirect
Sold at will 4×
$2.37M 47,300 at 50.05
42.8%
Not planned
17 Sep 2025
Jacobson Matthew Director · indirect
Sold at will 8×
$20.02M 396,147 at 50.53
84.4%
Sold half or more
15 Sep 2025
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$5.44M 108,600 at 50.14
100%
Sold half or more
15 Sep 2025
BLASING KAREN Director
Sold on a plan 2×
$162.77K 3,250 at 50.08
3.1%
Planned (10b5-1)
8 Sep 2025
Jacobson Matthew Director · indirect
Sold at will 2×
$6.70M 143,205 at 46.80
22.3%
Not planned
18 Aug 2025
Sijbrandij Sytse Director · indirect
Sold on a plan 3×
$4.90M 108,600 at 45.16
100%
Sold half or more
18 Aug 2025
BLASING KAREN Director
Sold on a plan
$146.25K 3,250 at 45.00
3.0%
Planned (10b5-1)
18 Jul 2025
BLASING KAREN Director
Sold on a plan
$146.25K 3,250 at 45.00
2.9%
Planned (10b5-1)
15 Jul 2025
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$4.71M 108,600 at 43.33
100%
Sold half or more
15 Jul 2025
Saintil Merline Director
Sold on a plan
$26.50K 607 at 43.65
4.3%
Planned (10b5-1)
2 Jul 2025
Saintil Merline Director
Sold on a plan
$27.62K 607 at 45.50
4.1%
Planned (10b5-1)
27 Jun 2025
BLASING KAREN Director
Sold on a plan
$146.25K 3,250 at 45.00
2.9%
Planned (10b5-1)
25 Jun 2025
Jacobson Matthew Director · indirect
Sold at will 2×
$5.48M 129,400 at 42.32
19.0%
Not planned
16 Jun 2025
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$4.50M 108,600 at 41.44
100%
Sold half or more
15 May 2025
BLASING KAREN Director
Sold on a plan 2×
$167.65K 3,250 at 51.58
2.9%
Planned (10b5-1)
23 Apr 2025
BLASING KAREN Director
Sold on a plan
$146.25K 3,250 at 45.00
2.8%
Planned (10b5-1)
24 Mar 2025
Jacobson Matthew Director · indirect
Sold at will 8×
$8.00M 152,884 at 52.34
23.7%
Not planned
19 Mar 2025
BOSTROM SUSAN L Director
Sold at will
$2.08M 40,000 at 51.88
21.6%
Not planned
17 Mar 2025
BLASING KAREN Director
Sold on a plan
$337.42K 6,500 at 51.91
5.3%
Planned (10b5-1)
18 Feb 2025
BLASING KAREN Director
Sold on a plan 3×
$458.74K 6,500 at 70.58
5.1%
Planned (10b5-1)
15 Jan 2025
BLASING KAREN Director
Sold on a plan 2×
$410.76K 6,500 at 63.19
4.8%
Planned (10b5-1)
31 Dec 2024
BOSTROM SUSAN L Director
Sold at will
$1.13M 20,000 at 56.26
9.8%
Not planned
27 Dec 2024
Jacobson Matthew Director · indirect
Sold at will 2×
$5.92K 100 at 59.18
0.2%
Not planned
26 Dec 2024
Jacobson Matthew Director · indirect
Sold at will 2×
$32.71M 547,679 at 59.72
90.4%
Sold half or more
24 Dec 2024
BOSTROM SUSAN L Director
Sold at will
$1.20M 20,000 at 60.19
8.9%
Not planned
17 Dec 2024
Sijbrandij Sytse Director · indirect
Sold on a plan
$1.69M 28,000 at 60.21
100%
Sold half or more
16 Dec 2024
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$3.30M 56,000 at 58.91
100%
Sold half or more
16 Dec 2024
BLASING KAREN Director
Sold on a plan
$191.72K 3,250 at 58.99
2.4%
Planned (10b5-1)
15 Nov 2024
BLASING KAREN Director
Sold on a plan 2×
$193.08K 3,250 at 59.41
2.3%
Planned (10b5-1)
15 Oct 2024
BLASING KAREN Director
Sold on a plan
$177.84K 3,250 at 54.72
2.2%
Planned (10b5-1)
Showing 1–50 of 71. Page 1 of 2 Older →