Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
355 institutional managers reported holding GTLB for the quarter ended Mar 31, 2026. Together they hold about 82% of shares outstanding; the top 10 hold 37%. 64 opened new positions; 140 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 15.90M | 9.49% | $343.8M | added +5.4% | 2021 Q4 |
| AQR Capital | 8.67M | 5.18% | $187.5M | added +59.5% | 2023 Q3 |
| BlackRock | 8.64M | 5.16% | $186.8M | added +2.6% | 2021 Q4 |
| PRIMECAP Management | 7.30M | 4.36% | $157.9M | added +529.6% | 2021 Q4 |
| Impactive Capital LP (focused) | 3.91M | 2.34% | $84.7M | opened | 2026 Q1 |
| Marshall Wace | 3.83M | 2.29% | $82.8M | added +936.3% | 2021 Q4 |
| Champlain Investment Partners, LLC | 3.81M | 2.28% | $82.4M | trimmed -6.8% | 2025 Q1 |
| Squarepoint Ops LLC | 3.68M | 2.20% | $79.7M | added +86.9% | 2021 Q4 |
| Two Sigma | 3.27M | 1.95% | $70.6M | added +2007.5% | 2023 Q2 |
| SG Americas Securities, LLC | 3.14M | 1.87% | $67.8M | added +6528% | 2024 Q3 |
| Geode Capital | 2.85M | 1.70% | $61.7M | added +4.8% | 2021 Q4 |
| Alphabet INC. (focused) | 2.72M | 1.63% | $58.9M | unchanged | 2022 Q2 |
| Franklin Resources | 2.68M | 1.60% | $57.9M | trimmed -17.3% | 2021 Q4 |
| HMI Capital Management, L.p. (focused) | 2.65M | 1.58% | $57.4M | trimmed -38.2% | 2022 Q1 |
| State Street | 2.55M | 1.52% | $55.2M | added +4.2% | 2021 Q4 |
| Federated Hermes, INC. | 2.48M | 1.48% | $53.7M | added +15720.7% | 2023 Q3 |
| Infinitum Asset Management, LLC (focused) | 2.25M | 1.34% | $48.7M | added +60.7% | 2024 Q4 |
| Edmond DE Rothschild Holding S.a. | 2.08M | 1.24% | $45.0M | added +81.6% | 2022 Q4 |
| Goldman Sachs | 2.07M | 1.24% | $44.7M | added +215% | 2021 Q4 |
| Morgan Stanley | 1.99M | 1.19% | $43.0M | added +48.6% | 2021 Q4 |
| Bank OF America CORP /DE/ | 1.96M | 1.17% | $42.3M | added +55.3% | 2021 Q4 |
| Technology Crossover Management X, LTD. (focused) | 1.92M | 1.15% | $41.6M | unchanged | 2021 Q4 |
| First Trust Advisors LP | 1.89M | 1.13% | $41.0M | added +19.7% | 2022 Q2 |
| UBS | 1.81M | 1.08% | $39.1M | trimmed -30.5% | 2021 Q4 |
| Fiera Capital CORP | 1.75M | 1.05% | $37.9M | added +4.8% | 2022 Q3 |
| FIL LTD | 1.67M | 1.00% | $36.2M | added +72.1% | 2025 Q4 |
| Neuberger Berman Group LLC | 1.65M | 0.98% | $35.6M | added +2098.7% | 2021 Q4 |
| Jane Street | 1.47M | 0.88% | $31.8M | added +7802.6% | 2021 Q4 |
| Connor, Clark & Lunn Investment Management LTD. | 1.34M | 0.80% | $29.0M | added +57% | 2024 Q2 |
| Millennium Management | 1.32M | 0.79% | $28.5M | added +136.3% | 2021 Q4 |
| D. E. Shaw | 1.20M | 0.72% | $25.9M | added +1391.2% | 2022 Q1 |
| Light Street Capital Management, LLC (focused) | 1.17M | 0.70% | $25.3M | added +10.4% | 2024 Q3 |
| MFS Investment Management | 1.06M | 0.64% | $23.0M | opened | 2026 Q1 |
| Armistice Capital, LLC | 1.03M | 0.61% | $22.3M | added +19.8% | 2025 Q2 |
| Charles Schwab Investment Management | 990.4k | 0.59% | $21.4M | added +5.5% | 2021 Q4 |
| General Catalyst Group Management, LLC (focused) | 921.4k | 0.55% | $19.9M | unchanged | 2021 Q4 |
| Disciplined Growth Investors INC /MN | 909.5k | 0.54% | $19.7M | opened | 2026 Q1 |
| Capital Group (American Funds) | 849.3k | 0.51% | $18.4M | unchanged | 2025 Q4 |
| ARK Investment Management | 826.9k | 0.49% | $17.9M | trimmed -4.2% | 2024 Q3 |
| CPP Investment Board | 766.3k | 0.46% | $16.6M | added +197.7% | 2025 Q4 |
| Ancient Art, L.p. (focused) | 750.0k | 0.45% | $16.2M | opened | 2026 Q1 |
| Northern Trust | 745.5k | 0.45% | $16.1M | added +4.7% | 2021 Q4 |
| Renaissance Technologies | 742.8k | 0.44% | $16.1M | opened | 2026 Q1 |
| BNY Mellon | 643.9k | 0.39% | $13.9M | trimmed -0.6% | 2021 Q4 |
| IEQ Capital, LLC | 616.0k | 0.37% | $13.3M | added +28.9% | 2024 Q1 |
| TFJ Management, LLC (focused) | 606.7k | 0.36% | $13.1M | added +50.6% | 2025 Q1 |
| Citadel Advisors | 587.7k | 0.35% | $12.7M | trimmed -37.8% | 2021 Q4 |
| Barton Investment Management | 554.9k | 0.33% | $12.0M | trimmed -0.7% | 2024 Q3 |
| Man Group | 549.6k | 0.33% | $11.9M | added +1786.8% | 2025 Q3 |
| Sumitomo Mitsui Trust Group, INC. | 535.8k | 0.32% | $11.6M | added +5% | 2024 Q2 |
Largest 50 of 355 shown; the full ranked, searchable register is at boothcheck.com/holders/GTLB. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.