Insider trading

Period: 12 months Stock: GTLB Plan: Scheduled (10b5-1) × + Add filter Clear all
Views & alerts

Save your view. Keep the filter you have built, and get an email when a new filing matches it. A free account does both.

When

Period

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

21 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.

21 decisions over 12 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.

21 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.

21 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.
21 decisions over 12 months Remove this filter
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
21 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.

21 decisions over 12 months
Stock
Insider
Type ?
Why it stands out
30 Sep 2026
Staples William Chief Executive Officer
Bought on a plan
$124.80K 2,677 at 46.62
0.4%
Bought on a plan
28 Sep 2026
Sijbrandij Sytse Director · indirect
Sold on a plan 3×
$19.71M 430,000 at 45.84
3.3%
Planned (10b5-1)
28 Sep 2026
Padisetty Sivaprasad Chief Technology Officer
Sold on a plan 3×
$2.38M 51,915 at 45.78
12.1%
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)
7 Aug 2026
Mundy Simon Chief Accounting Officer
Sold on a plan
$331.55K 8,725 at 38.00
7.6%
Planned (10b5-1)
30 Jun 2026
Staples William Chief Executive Officer
Bought on a plan
$122.96K 4,188 at 29.36
0.6%
Bought on a plan
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
31 Mar 2026
Staples William Chief Executive Officer
Bought on a plan 2×
$128.34K 6,010 at 21.35
1.8%
Bought on a plan
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
31 Dec 2025
Staples William Chief Executive Officer
Bought on a plan
$124.75K 3,276 at 38.08
1.0%
Bought on a plan
31 Dec 2025
Shen James Interim CFO
Sold on a plan
$96.65K 2,538 at 38.08
4.6%
Planned (10b5-1)
18 Dec 2025
Mundy Simon Chief Accounting Officer
Sold on a plan
$105.89K 2,756 at 38.42
5.5%
Planned (10b5-1)
16 Dec 2025
Mundy Simon Chief Accounting Officer
Sold on a plan
$27.47K 723 at 38.00
1.4%
Planned (10b5-1)
15 Dec 2025
Sijbrandij Sytse Director · indirect
Sold on a plan 2×
$2.11M 54,300 at 38.95
100%
Sold half or more
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)
Showing 1–21 of 21.