Sytse Sijbrandij
CIK 1886022 · Executive Chair of the Board · last filed 2026-05-18
Sytse Sijbrandij is an Executive Chair of the Board who has filed 39 SEC Form 4 insider transactions across 1 company since 2021. The most recent filing, for GTLB, was dated May 18, 2026. Across all open-market trades the lifetime net is −$690.4M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $420.3M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$420.29M
1
39
-$690.39M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| GTLB | Director | 15,123,659 | $27.79 | $420.29M | -$690.39M | 39 | 2026-05-18 |
Recent Filings
39 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-05-18 | GTLB | Mixed | +15,018,251 | -$2.89M | EDGAR |
| 2026-04-16 | GTLB | Mixed | — | -$2.41M | EDGAR |
| 2026-02-18 | GTLB | Mixed | — | -$1.54M | EDGAR |
| 2026-01-15 | GTLB | Mixed | — | -$1.95M | EDGAR |
| 2025-12-17 | GTLB | Mixed | — | -$2.11M | EDGAR |
| 2025-12-12 | GTLB | Gift (G) | — | $0 | EDGAR |
| 2025-11-19 | GTLB | Mixed | — | -$4.69M | EDGAR |
| 2025-10-16 | GTLB | Mixed | — | -$4.81M | EDGAR |
| 2025-09-17 | GTLB | Mixed | — | -$5.44M | EDGAR |
| 2025-08-19 | GTLB | Mixed | — | -$4.90M | EDGAR |