Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
1,147 institutional managers reported holding SNDK for the quarter ended Mar 31, 2026. Together they hold about 71% of shares outstanding; the top 10 hold 38%. 496 opened new positions; 68 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 14.61M | 9.31% | $9.29B | trimmed -14% | 2025 Q1 |
| FMR (Fidelity) | 13.39M | 8.53% | $8.52B | trimmed -37.6% | 2025 Q1 |
| BlackRock | 10.40M | 6.63% | $6.62B | added +8.1% | 2025 Q1 |
| State Street | 5.57M | 3.55% | $3.54B | added +5.5% | 2025 Q1 |
| Geode Capital | 4.21M | 2.68% | $2.68B | added +15.2% | 2025 Q1 |
| Morgan Stanley | 2.84M | 1.81% | $1.81B | trimmed -4.4% | 2025 Q1 |
| Arrowstreet Capital | 2.82M | 1.80% | $1.80B | trimmed -18.8% | 2025 Q2 |
| Goldman Sachs | 2.04M | 1.30% | $1.30B | added +210.1% | 2025 Q1 |
| Jane Street | 1.79M | 1.14% | $1.14B | added +111.3% | 2025 Q1 |
| Charles Schwab Investment Management | 1.74M | 1.11% | $1.11B | added +6.2% | 2025 Q1 |
| BNP Paribas Financial Markets | 1.29M | 0.82% | $822.6M | added +49.8% | 2025 Q1 |
| Northern Trust | 1.23M | 0.79% | $785.2M | added +8.9% | 2025 Q1 |
| Clear Street Group INC. | 1.22M | 0.78% | $778.8M | opened | 2026 Q1 |
| UBS | 1.17M | 0.75% | $747.2M | added +49.3% | 2025 Q1 |
| D. E. Shaw | 1.17M | 0.75% | $745.9M | trimmed -44% | 2025 Q1 |
| Invesco | 1.17M | 0.74% | $741.0M | trimmed -12.2% | 2025 Q1 |
| T. Rowe Price | 1.16M | 0.74% | $735.0M | trimmed -19.6% | 2025 Q1 |
| Millennium Management | 1.14M | 0.73% | $726.5M | trimmed -23.8% | 2025 Q1 |
| Situational Awareness Partners LP (focused) | 1.14M | 0.73% | $725.1M | opened | 2026 Q1 |
| Situational Awareness LP (focused) | 1.14M | 0.73% | $725.1M | added +8.2% | 2025 Q3 |
| Deutsche Bank AG\ | 1.03M | 0.65% | $653.1M | added +12.3% | 2025 Q1 |
| Bank OF America CORP /DE/ | 999.8k | 0.64% | $635.8M | trimmed -39.2% | 2025 Q1 |
| Susquehanna International Group | 986.3k | 0.63% | $627.3M | added +769.9% | 2025 Q1 |
| SG Americas Securities, LLC | 944.5k | 0.60% | $600.7M | added +108.4% | 2025 Q1 |
| HRT Financial LP | 892.2k | 0.57% | $567.4M | added +1250.5% | 2025 Q2 |
| Anther Capital LTD (focused) | 889.6k | 0.57% | $565.7M | opened | 2026 Q1 |
| Polar Capital Holdings PLC | 877.0k | 0.56% | $557.8M | trimmed -30.8% | 2025 Q3 |
| Dimensional Fund Advisors | 876.9k | 0.56% | $557.7M | trimmed -8.5% | 2025 Q1 |
| Amundi | 872.6k | 0.56% | $555.0M | added +135.5% | 2025 Q2 |
| Qube Research & Technologies LTD | 844.2k | 0.54% | $536.9M | trimmed -22% | 2025 Q4 |
| WT Asset Management LTD (focused) | 828.8k | 0.53% | $527.1M | added +293.3% | 2025 Q3 |
| Whale Rock Capital (focused) | 799.6k | 0.51% | $508.5M | trimmed -20.3% | 2025 Q4 |
| Renaissance Technologies | 799.6k | 0.51% | $508.5M | trimmed -33.9% | 2025 Q2 |
| Two Sigma | 762.7k | 0.49% | $485.1M | added +6.6% | 2025 Q3 |
| BNY Mellon | 724.2k | 0.46% | $460.6M | added +7.6% | 2025 Q1 |
| AQR Capital | 693.8k | 0.44% | $441.2M | trimmed -38.9% | 2025 Q1 |
| Wellington Management | 623.2k | 0.40% | $396.3M | added +501.6% | 2025 Q4 |
| Madison Avenue Partners, LP (focused) | 619.0k | 0.39% | $393.7M | trimmed -56.8% | 2025 Q2 |
| Citadel Advisors | 607.8k | 0.39% | $386.5M | added +50.7% | 2025 Q1 |
| Voya Investment Management LLC | 597.8k | 0.38% | $380.2M | added +210.1% | 2025 Q1 |
| Hsbc Holdings PLC | 587.0k | 0.37% | $373.3M | added +232.7% | 2025 Q1 |
| Marshall Wace | 564.6k | 0.36% | $359.1M | trimmed -43.7% | 2025 Q1 |
| Marex Group plc | 554.4k | 0.35% | $352.6M | opened | 2026 Q1 |
| Toronto Dominion Bank | 488.8k | 0.31% | $310.9M | added +1721% | 2025 Q4 |
| Nuveen | 457.2k | 0.29% | $290.8M | added +7.6% | 2025 Q1 |
| Barclays PLC | 441.7k | 0.28% | $280.9M | added +50% | 2025 Q1 |
| Victory Capital Management INC | 402.7k | 0.26% | $256.1M | added +146.7% | 2025 Q1 |
| Point72 | 376.6k | 0.24% | $239.5M | trimmed -35.3% | 2025 Q3 |
| Legal & General Group PLC | 365.8k | 0.23% | $232.6M | added +75.8% | 2025 Q1 |
| Evergreen Quality Fund GP, LTD. (focused) | 353.9k | 0.23% | $225.0M | trimmed -67.2% | 2025 Q4 |
Largest 50 of 1,147 shown; the full ranked, searchable register is at boothcheck.com/holders/SNDK. 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.