Ticker · CUSIP 37637K108
Holders (tracked)
22
Combined shares
20,703,305
Combined value
$621.14M
Last close
$21.83
Quarter
2025Q4
Tracked holders · last 8 quarters
+5 vs previous quarter over the last 8.
22182024Q12025Q4
Price is -27.2% vs the avg quarter-end implied price across tracked holders.

SEC event timeline

27 events
  1. Sijbrandij Sytse
    2026-04-15
    Sold $2.41M @ $20.77
    Insider sell
  2. −171,530 shares · 2025Q4
    13F
  3. +4,806,163 shares · 2025Q4
    13F
  4. +3,110 shares · 2025Q4
    13F
  5. +80,451 shares · 2025Q4
    13F
  6. −560,735 shares · 2025Q4
    13F
  7. +348,865 shares · 2025Q4
    13F
  8. −424,041 shares · 2025Q4
    13F
  9. −654,866 shares · 2025Q4
    13F
  10. +16,500 shares · 2025Q4
    13F
  11. +15,378 shares · 2025Q4
    13F
  12. +210,000 shares · 2025Q4
    13F
  13. +55,701 shares · 2025Q4
    13F
  14. −2,574,042 shares · 2025Q4
    13F
  15. +2,168,377 shares · 2025Q4
    13F
  16. −79,478 shares · 2025Q3
    13F
  17. −16,876 shares · 2025Q3
    13F
  18. +468,171 shares · 2025Q3
    13F
  19. −25,642 shares · 2025Q3
    13F
  20. +375,585 shares · 2025Q3
    13F
  21. +211,604 shares · 2025Q3
    13F
  22. −239,249 shares · 2025Q3
    13F
  23. +4,491,023 shares · 2025Q3
    13F
  24. −2,072,463 shares · 2025Q3
    13F
  25. +419,575 shares · 2025Q3
    13F
  26. +182,550 shares · 2024Q3
    13F
  27. +144,932 shares · 2025Q3
    13F

Insider activity

Last 30 days
Net (open-market)
−$2.41M
Buys
0 · $0
Sells
1 · $2.41M
Unique insiders
1
DateInsiderCodeSharesPriceValue
04-15Sijbrandij Sytse
Director
S116,200$20.77$2.41M
04-15Sijbrandij Sytse
Director
C116,200$0
Follow-the-investor returns
If you'd copied each holder of GTLB…
Cost basis inferred from 13F share-delta history. Sorted by % return on the position they're still holding.
InvestorFirst inCost basisReturnPosition value today
T. Rowe Price2021Q4$0.06+37102.3%$90.7M
Jeremy Grantham (GMO)2025Q4$37.53-41.8%$360K
Izzy Englander (Millennium Mgmt)2021Q4$37.59-41.9%$12.2M
Izzy Englander (Millennium Mgmt)2021Q4$37.59-41.9%$12.2M
Izzy Englander (Millennium Mgmt)2021Q4$37.59-41.9%$12.2M
D.E. Shaw & Co.2022Q1$38.34-43.1%$9.1M
D.E. Shaw & Co.2022Q1$38.34-43.1%$9.1M
D.E. Shaw & Co.2022Q1$38.34-43.1%$9.1M
AQR Capital Management2023Q3$39.42-44.6%$118.6M
Sands Capital Management2022Q2$40.75-46.4%$2.8M
Paul Tudor Jones (Tudor Investment)2021Q4$40.83-46.5%$336K
Paul Tudor Jones (Tudor Investment)2021Q4$40.83-46.5%$336K
Paul Tudor Jones (Tudor Investment)2021Q4$40.83-46.5%$336K
Ken Griffin (Citadel Advisors)2021Q4$41.74-47.7%$10.4M
Ken Griffin (Citadel Advisors)2021Q4$41.74-47.7%$10.4M
Ken Griffin (Citadel Advisors)2021Q4$41.74-47.7%$10.4M
Glen Kacher (Light Street Capital)2022Q1$44.31-50.7%$23.1M
Ray Dalio (Bridgewater Associates)2024Q2$45.02-51.5%$14.1M
Two Sigma Investments2023Q2$45.66-52.2%$3.4M
Cathie Wood (ARK Invest)2021Q4$49.26-55.7%$18.9M
Ron Baron (Baron Capital / BAMCO)2021Q4$49.94-56.3%$31.1M
Norges Bank (Norway SWF)2021Q4$2436.75-99.1%$47.3M

Who moved on this name in 2025Q4

13F transactions reported for the latest quarter, grouped by direction.

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.
QuarterHoldersCombined value
2022Q1
16
$56.29B
2022Q2
19
$68.34B
2022Q3
17
$84.1M
2022Q4
17
$545.2M
2023Q1
18
$441.3M
2023Q2
19
$711.0M
2023Q3
22
$690.7M
2023Q4
17
$930.9M
2024Q1
18
$987.0M
2024Q2
22
$1.01B
2024Q3
24
$688.9M
2024Q4
20
$801.8M
2025Q1
20
$479.3M
2025Q2
21
$528.6M
2025Q3
17
$547.9M
2025Q4
22
$621.1M
Congress members trading this stock
DateMemberTypeAmount rangeFiling
2025-06-11Rob BresnahanSell$1K – $15KPDF ↗
2025-06-03Rob BresnahanSell (P)$1K – $15KPDF ↗

Who owns GTLB

22 super-investors · 2025Q4
Tracked stake
20.70M
shares
Combined value
$621M
% of shares outstanding
shares-out unknown
Quarter action mix
New8Added9Trim4Held1
#ManagerSharesValue
1AQR Capital Management5.43M$204M
2Norges Bank
Norway SWF
2.17M$81M
3Ron Baron
Baron Capital / BAMCO
1.43M$54M
4Ken Griffin
Citadel Advisors
1.14M$43M
5Glen Kacher
Light Street Capital
1.06M$40M
6Ken Griffin
Citadel Advisors
944.6K$35M
7Cathie Wood
ARK Invest
863.6K$32M
8Ray Dalio
Bridgewater Associates
644.3K$24M
9Izzy Englander
Millennium Mgmt
556.8K$21M
10Ken Griffin
Citadel Advisors
476.2K$18M
11D.E. Shaw & Co.465.3K$17M
12D.E. Shaw & Co.418.1K$16M
13Paul Tudor Jones
Tudor Investment
213.9K$8M
14Izzy Englander
Millennium Mgmt
170.2K$6M
15Two Sigma Investments155.0K$6M
16Paul Tudor Jones
Tudor Investment
147.4K$6M
17Sands Capital Management127.5K$5M
18D.E. Shaw & Co.80.5K$3M
19Izzy Englander
Millennium Mgmt
21.1K$792K
20Jeremy Grantham
GMO
16.5K$619K
21Paul Tudor Jones
Tudor Investment
15.4K$577K
22T. Rowe Price4.16M$156K

Recent moves

20 transactions
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