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Data as of 2026-09-29
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Sytse Sijbrandij: insider trades

Every open market trade Sytse Sijbrandij has filed with the SEC, when each filing appeared, and how the buys did against the S&P 500 once the filing was public.

Key Facts

  • Sytse Sijbrandij is listed as Director at GTLB.
  • Between 2026-04-16 (16 April 2026) and 2026-09-28 (28 September 2026) Sytse Sijbrandij filed 0 open market buys worth $0 and 5 open market sales worth $107M.
  • None of Sytse Sijbrandij's buys has matured 90 days yet, so there is no return to report.
  • Data as of 2026-09-29 (29 September 2026).
Open market buys 0 $0
Open market sales 5 $107M
Avg vs S&P, 90d n/a 0 scored buys
Beat the S&P n/a 90 days after entry

Would copying Sytse Sijbrandij have paid?

prices as of 2026-09-28

The result. None of Sytse Sijbrandij's buys has matured 90 days yet, so there is no return to report.

Average return of Sytse Sijbrandij's open market buys against the S&P 500.
Days after entryScored buysAvg vs S&PBeat S&PEntry monthst statisticReading
30 days 0 n/a n/a n/a n/a too few trades to tell
90 days 0 n/a n/a n/a n/a too few trades to tell
180 days 0 n/a n/a n/a n/a too few trades to tell

A return curve needs at least 10 scored buys. Sytse Sijbrandij does not have enough yet.

Stocks traded

  1. GTLB5 trades, $107M

Every open market trade

as of 2026-09-29
5 trades.
Open market trades filed by Sytse Sijbrandij, newest first.
FiledStockTypeSharesPriceValue90 day vs S&P
28 Sep 2026 GTLB sell 705,490 $47.75 $34M n/a
28 Sep 2026 GTLB sell 430,000 $45.84 $20M n/a
28 Sep 2026 GTLB sell 980,710 $48.63 $48M n/a
17 Jun 2026 GTLB sell 116,200 $28.44 $3.3M n/a
16 Apr 2026 GTLB sell 116,200 $20.77 $2.4M n/a

Insider sales are shown but not scored, because they are often planned for tax or diversification reasons.

Frequently asked questions

What has Sytse Sijbrandij bought and sold?

Between 2026-04-16 (16 April 2026) and 2026-09-28 (28 September 2026) Sytse Sijbrandij filed 0 open market buys worth $0 and 5 open market sales worth $107M.

Did Sytse Sijbrandij's buys beat the market?

None of Sytse Sijbrandij's buys has matured 90 days yet, so there is no return to report. Insider sales are not scored because they are often planned for tax or diversification reasons.

Sources: Insider trades: SEC Form 4 filings, collected from Finviz. Prices: Yahoo Finance daily adjusted closes. Data as of 2026-09-29 (29 September 2026). About these sources.

Not investment advice. Past disclosed trades do not predict future returns. Disclosures are published late, so the trades shown are ones you could only have copied after the fact. Talk to a licensed adviser before you invest.