GTLB Insider Transactions
883 retained open-market purchase and sale rows from SEC Forms 3, 4 and 5, newest first. This page shows rows 1–100; provenance stays internal.
GTLB insiders transaction timeline
PurchaseSale
| Insider profile | Role | Date | Transaction | Shares | Price |
|---|
| Mundy Simon | Chief Accounting Officer | 2026-08-07 | Sale | 8,725 | $38 |
|---|
| Staples William | Chief Executive Officer | 2026-06-30 | Purchase | 4,188 | $29.36 |
|---|
| Sijbrandij Sytse | Director | 2026-06-15 | Sale | 13,565.0 | $28.83 |
|---|
| Sijbrandij Sytse | Director | 2026-06-15 | Sale | 102,635.0 | $28.39 |
|---|
| Sijbrandij Sytse | Director | 2026-05-18 | Sale | 105,408.0 | $24.93 |
|---|
| Sijbrandij Sytse | Director | 2026-05-18 | Sale | 10,792.0 | $24.09 |
|---|
| Sijbrandij Sytse | Director | 2026-04-15 | Sale | 116,200.0 | $20.77 |
|---|
| Staples William | Chief Executive Officer | 2026-03-31 | Purchase | 941.0 | $21.65 |
|---|
| Staples William | Chief Executive Officer | 2026-03-31 | Purchase | 5,069.0 | $21.3 |
|---|
| BOSTROM SUSAN L | Director | 2026-03-27 | Sale | 22,500.0 | $20.32 |
|---|
| BOSTROM SUSAN L | Director | 2026-03-27 | Sale | 10,000.0 | $20.45 |
|---|
| Jacobson Matthew | Director | 2026-03-20 | Sale | 188,658.0 | $22.37 |
|---|
| Jacobson Matthew | Director | 2026-03-20 | Sale | 193,722.0 | $22.37 |
|---|
| Jacobson Matthew | Director | 2026-03-20 | Sale | 66,797.0 | $22.37 |
|---|
| Jacobson Matthew | Director | 2026-03-20 | Sale | 9,079.0 | $22.37 |
|---|
| Jacobson Matthew | Director | 2026-03-20 | Sale | 543.0 | $22.37 |
|---|
| Jacobson Matthew | Director | 2026-03-20 | Sale | 328.0 | $22.37 |
|---|
| Jacobson Matthew | Director | 2026-03-20 | Sale | 347.0 | $22.37 |
|---|
| Jacobson Matthew | Director | 2026-03-20 | Sale | 325.0 | $22.37 |
|---|
| Jacobson Matthew | Director | 2026-03-19 | Sale | 346,845.0 | $22.95 |
|---|
| Jacobson Matthew | Director | 2026-03-19 | Sale | 235,382.0 | $22.95 |
|---|
| Jacobson Matthew | Director | 2026-03-19 | Sale | 66,183.0 | $22.95 |
|---|
| Jacobson Matthew | Director | 2026-03-19 | Sale | 49,349.0 | $22.95 |
|---|
| Jacobson Matthew | Director | 2026-03-19 | Sale | 827.0 | $22.95 |
|---|
| Jacobson Matthew | Director | 2026-03-19 | Sale | 499.0 | $22.95 |
|---|
| Jacobson Matthew | Director | 2026-03-19 | Sale | 529.0 | $22.95 |
|---|
| Jacobson Matthew | Director | 2026-03-19 | Sale | 495.0 | $22.95 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2026-02-17 | Sale | 3,000.0 | $29.18 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2026-02-17 | Sale | 51,300.0 | $28.36 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2026-01-14 | Sale | 10,051.0 | $36.43 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2026-01-14 | Sale | 44,249.0 | $35.85 |
|---|
| Staples William | Chief Executive Officer | 2025-12-31 | Purchase | 3,276.0 | $38.08 |
|---|
| Shen James | Interim CFO | 2025-12-31 | Sale | 2,538.0 | $38.08 |
|---|
| Jacobson Matthew | Director | 2025-12-19 | Sale | 334,827.0 | $38.08 |
|---|
| Mundy Simon | Chief Accounting Officer | 2025-12-18 | Sale | 2,756.0 | $38.42 |
|---|
| Mundy Simon | Chief Accounting Officer | 2025-12-16 | Sale | 723.0 | $38.0 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-12-15 | Sale | 700.0 | $39.6 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-12-15 | Sale | 53,600.0 | $38.94 |
|---|
| BOSTROM SUSAN L | Director | 2025-12-09 | Sale | 30,000.0 | $39.25 |
|---|
| BOSTROM SUSAN L | Director | 2025-12-08 | Sale | 15,000.0 | $39.5 |
|---|
| BOSTROM SUSAN L | Director | 2025-12-08 | Sale | 15,000.0 | $39.42 |
|---|
| BOSTROM SUSAN L | Director | 2025-12-08 | Sale | 15,000.0 | $39.75 |
|---|
| BOSTROM SUSAN L | Director | 2025-12-08 | Sale | 15,000.0 | $39.55 |
|---|
| BOSTROM SUSAN L | Director | 2025-12-08 | Sale | 10,000.0 | $39.5 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-11-17 | Sale | 34,659.0 | $43.59 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-11-17 | Sale | 73,941.0 | $42.98 |
|---|
| BLASING KAREN | Director | 2025-10-15 | Sale | 3,250.0 | $45.26 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-10-15 | Sale | 31,708.0 | $44.75 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-10-15 | Sale | 76,892.0 | $44.1 |
|---|
| Mundy Simon | Chief Accounting Officer | 2025-10-01 | Sale | 5,191.0 | $43.99 |
|---|
| Jacobson Matthew | Director | 2025-09-23 | Sale | 22,386.0 | $50.16 |
|---|
| Jacobson Matthew | Director | 2025-09-23 | Sale | 13,510.0 | $50.16 |
|---|
| Jacobson Matthew | Director | 2025-09-23 | Sale | 14,304.0 | $50.16 |
|---|
| Jacobson Matthew | Director | 2025-09-23 | Sale | 13,387.0 | $50.16 |
|---|
| Jacobson Matthew | Director | 2025-09-19 | Sale | 82,160.0 | $50.17 |
|---|
| Jacobson Matthew | Director | 2025-09-19 | Sale | 49,587.0 | $50.17 |
|---|
| Jacobson Matthew | Director | 2025-09-19 | Sale | 52,501.0 | $50.17 |
|---|
| Jacobson Matthew | Director | 2025-09-19 | Sale | 49,134.0 | $50.17 |
|---|
| Jacobson Matthew | Director | 2025-09-18 | Sale | 16,652.0 | $50.05 |
|---|
| Jacobson Matthew | Director | 2025-09-18 | Sale | 10,050.0 | $50.05 |
|---|
| Jacobson Matthew | Director | 2025-09-18 | Sale | 10,640.0 | $50.05 |
|---|
| Jacobson Matthew | Director | 2025-09-18 | Sale | 9,958.0 | $50.05 |
|---|
| Jacobson Matthew | Director | 2025-09-17 | Sale | 7,944.0 | $51.1 |
|---|
| Jacobson Matthew | Director | 2025-09-17 | Sale | 4,784.0 | $51.1 |
|---|
| Jacobson Matthew | Director | 2025-09-17 | Sale | 5,076.0 | $51.1 |
|---|
| Jacobson Matthew | Director | 2025-09-17 | Sale | 4,764.0 | $51.1 |
|---|
| Jacobson Matthew | Director | 2025-09-17 | Sale | 131,516.0 | $50.5 |
|---|
| Jacobson Matthew | Director | 2025-09-17 | Sale | 79,385.0 | $50.5 |
|---|
| Jacobson Matthew | Director | 2025-09-17 | Sale | 84,040.0 | $50.5 |
|---|
| Jacobson Matthew | Director | 2025-09-17 | Sale | 78,638.0 | $50.5 |
|---|
| BLASING KAREN | Director | 2025-09-15 | Sale | 401.0 | $50.54 |
|---|
| BLASING KAREN | Director | 2025-09-15 | Sale | 2,849.0 | $50.02 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-09-15 | Sale | 29,126.0 | $50.45 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-09-15 | Sale | 79,474.0 | $50.02 |
|---|
| Jacobson Matthew | Director | 2025-09-08 | Sale | 89,306.0 | $46.8 |
|---|
| Jacobson Matthew | Director | 2025-09-08 | Sale | 53,899.0 | $46.8 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-08-18 | Sale | 6,413.0 | $45.98 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-08-18 | Sale | 69,929.0 | $45.47 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-08-18 | Sale | 32,258.0 | $44.32 |
|---|
| BLASING KAREN | Director | 2025-08-18 | Sale | 3,250.0 | $45.0 |
|---|
| BLASING KAREN | Director | 2025-07-18 | Sale | 3,250.0 | $45.0 |
|---|
| Saintil Merline | Director | 2025-07-15 | Sale | 607.0 | $43.65 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-07-15 | Sale | 12,516.0 | $44.06 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-07-15 | Sale | 96,084.0 | $43.24 |
|---|
| Saintil Merline | Director | 2025-07-02 | Sale | 607.0 | $45.5 |
|---|
| BLASING KAREN | Director | 2025-06-27 | Sale | 3,250.0 | $45.0 |
|---|
| Jacobson Matthew | Director | 2025-06-25 | Sale | 80,696.0 | $42.32 |
|---|
| Jacobson Matthew | Director | 2025-06-25 | Sale | 48,704.0 | $42.32 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-06-16 | Sale | 23,992.0 | $42.11 |
|---|
| Sijbrandij Sytse | Director,TenPercentOwner | 2025-06-16 | Sale | 84,608.0 | $41.25 |
|---|
| BLASING KAREN | Director | 2025-05-15 | Sale | 300.0 | $52.5 |
|---|
| BLASING KAREN | Director | 2025-05-15 | Sale | 2,950.0 | $51.49 |
|---|
| Sijbrandij Sytse | Executive Chair of the Board | 2025-05-14 | Sale | 17,423.0 | $53.58 |
|---|
| Sijbrandij Sytse | Executive Chair of the Board | 2025-05-14 | Sale | 91,177.0 | $52.92 |
|---|
| ROBINS BRIAN G | Chief Financial Officer | 2025-05-13 | Sale | 45,000.0 | $53.04 |
|---|
| BLASING KAREN | Director | 2025-04-23 | Sale | 3,250.0 | $45.0 |
|---|
| Sijbrandij Sytse | Executive Chair of the Board | 2025-04-15 | Sale | 108,600.0 | $42.87 |
|---|
| Jacobson Matthew | Director | 2025-03-24 | Sale | 3,334.0 | $53.13 |
|---|
| Jacobson Matthew | Director | 2025-03-24 | Sale | 74,131.0 | $52.3 |
|---|
| Jacobson Matthew | Director | 2025-03-24 | Sale | 2,012.0 | $53.13 |
|---|