Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
139 institutional managers reported holding STUB for the quarter ended Mar 31, 2026. Together they hold about 65% of shares outstanding; the top 10 hold 50%. 60 opened new positions; 31 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Madrone Advisors, LLC (focused) | 75.78M | 20.03% | $471.7M | unchanged | 2025 Q3 |
| WestCap Management, LLC (focused) | 28.99M | 7.66% | $180.5M | trimmed -8.6% | 2025 Q4 |
| Deer Management CO. LLC (focused) | 22.04M | 5.83% | $137.2M | unchanged | 2025 Q3 |
| PointState Capital LP (focused) | 20.13M | 5.32% | $125.3M | trimmed -18.9% | 2025 Q3 |
| Capital Group (American Funds) | 9.00M | 2.38% | $56.0M | added +711.4% | 2025 Q3 |
| StepStone Group LP (focused) | 7.56M | 2.00% | $47.1M | unchanged | 2025 Q3 |
| Neuberger Berman Group LLC | 7.37M | 1.95% | $45.9M | unchanged | 2025 Q3 |
| Index Venture Associates III LTD (focused) | 6.30M | 1.66% | $39.2M | unchanged | 2025 Q4 |
| Klingenstein Fields & CO LP | 6.17M | 1.63% | $38.4M | opened | 2026 Q1 |
| Entrust Global Partners L L C (focused) | 4.85M | 1.28% | $30.2M | opened | 2026 Q1 |
| DME Capital Management, LP (focused) | 4.23M | 1.12% | $26.4M | opened | 2026 Q1 |
| Capital International Investors | 4.08M | 1.08% | $25.4M | unchanged | 2025 Q4 |
| Citadel Advisors | 3.75M | 0.99% | $23.4M | added +545.4% | 2025 Q3 |
| Declaration Partners LP (focused) | 3.49M | 0.92% | $21.7M | trimmed -76.4% | 2025 Q4 |
| Insight Holdings Group, LLC (focused) | 3.44M | 0.91% | $21.4M | unchanged | 2025 Q3 |
| Abu Dhabi Investment Council CO P.j.s.c (focused) | 3.44M | 0.91% | $21.4M | first filing | 2026 Q1 |
| Rokos Capital Management LLP | 2.14M | 0.57% | $13.3M | added +40.4% | 2025 Q4 |
| Brown University (focused) | 2.06M | 0.55% | $12.8M | unchanged | 2025 Q3 |
| Bamco INC /NY/ | 1.93M | 0.51% | $12.0M | trimmed -34.6% | 2025 Q3 |
| BlackRock | 1.74M | 0.46% | $10.8M | trimmed -64.9% | 2025 Q3 |
| Slate Path Capital LP (focused) | 1.46M | 0.39% | $9.1M | unchanged | 2025 Q4 |
| Duquesne Family Office | 1.37M | 0.36% | $8.5M | trimmed -40.7% | 2025 Q3 |
| Davenport & CO LLC | 1.35M | 0.36% | $8.4M | added +83.4% | 2025 Q4 |
| Marshall Wace | 1.27M | 0.34% | $7.9M | added +90.4% | 2025 Q3 |
| Millennium Management | 1.25M | 0.33% | $7.8M | added +99.2% | 2025 Q3 |
| UBS | 1.04M | 0.28% | $6.5M | added +27.5% | 2025 Q3 |
| Discovery Capital Management, LLC / CT | 960.5k | 0.25% | $6.0M | unchanged | 2025 Q3 |
| Maverick Capital | 931.5k | 0.25% | $5.8M | unchanged | 2025 Q3 |
| WS Management Lllp (focused) | 800.0k | 0.21% | $5.0M | unchanged | 2025 Q4 |
| Squarepoint Ops LLC | 762.5k | 0.20% | $4.7M | added +5774.1% | 2025 Q3 |
| SCS Capital Management LLC | 757.4k | 0.20% | $4.7M | opened | 2026 Q1 |
| Colter Lewis Investment Partners LLC | 682.7k | 0.18% | $4.2M | opened | 2026 Q1 |
| Pine Ridge Advisers LLC (focused) | 659.8k | 0.17% | $4.1M | opened | 2026 Q1 |
| Alberta Investment Management CORP | 631.0k | 0.17% | $3.9M | trimmed -26.3% | 2025 Q3 |
| Bank OF America CORP /DE/ | 572.8k | 0.15% | $3.6M | added +396.1% | 2025 Q3 |
| Wells Fargo & COMPANY/MN | 553.0k | 0.15% | $3.4M | added +103.7% | 2025 Q3 |
| Goldman Sachs | 541.7k | 0.14% | $3.4M | trimmed -56.7% | 2025 Q3 |
| RPM Capital Partners, LLC (focused) | 535.9k | 0.14% | $3.3M | unchanged | 2025 Q4 |
| Vanguard Group | 535.5k | 0.14% | $3.3M | trimmed -32.9% | 2025 Q3 |
| NWI Management LP (focused) | 500.0k | 0.13% | $3.1M | unchanged | 2025 Q3 |
| HRT Financial LP | 497.7k | 0.13% | $3.1M | opened | 2026 Q1 |
| Susquehanna International Group | 413.0k | 0.11% | $2.6M | added +2356.3% | 2025 Q4 |
| Divisadero Street Capital Management, LP | 384.6k | 0.10% | $2.4M | opened | 2026 Q1 |
| Weiss Asset Management LP | 384.1k | 0.10% | $2.4M | opened | 2026 Q1 |
| Geode Capital | 374.9k | 0.10% | $2.3M | added +4.4% | 2025 Q4 |
| Stephens Group, LLC (focused) | 348.7k | 0.09% | $2.2M | opened | 2026 Q1 |
| Comprehensive Financial Management LLC (focused) | 343.7k | 0.09% | $2.1M | opened | 2026 Q1 |
| Bank OF Montreal /CAN/ | 340.2k | 0.09% | $2.1M | added +835.5% | 2025 Q4 |
| Galaxy Digital Capital Management GP LLC | 331.7k | 0.09% | $2.1M | trimmed -50.5% | 2025 Q4 |
| BNP Paribas Financial Markets | 290.6k | 0.08% | $1.8M | added +1021% | 2025 Q4 |
Largest 50 of 139 shown; the full ranked, searchable register is at boothcheck.com/holders/STUB. 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.