Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
63 institutional managers reported holding BAK for the quarter ended Mar 31, 2026. Together they hold about 1% of shares outstanding; the top 10 hold 1%. 23 opened new positions; 10 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| LPL Financial LLC | 777.1k | 0.10% | $2.9M | added +476.4% | 2024 Q2 |
| Marshall Wace | 680.4k | 0.09% | $2.5M | added +321% | 2023 Q3 |
| Brooklands Fund Management LTD (focused) | 550.0k | 0.07% | $2.0M | opened | 2026 Q1 |
| Jane Street | 518.8k | 0.07% | $1.9M | added +134.9% | 2023 Q2 |
| X-Square Capital, LLC | 500.9k | 0.06% | $1.8M | added +170.8% | 2023 Q4 |
| Lonestar Capital Management LLC (focused) | 500.0k | 0.06% | $1.8M | opened | 2026 Q1 |
| Vanguard Group | 499.9k | 0.06% | $1.8M | trimmed -12.5% | 2019 Q4 |
| Morgan Stanley | 487.2k | 0.06% | $1.8M | added +2280% | 2019 Q4 |
| UBS | 460.0k | 0.06% | $1.7M | added +59.7% | 2023 Q4 |
| State Street | 325.0k | 0.04% | $1.2M | added +4.3% | 2019 Q4 |
| BlackRock | 286.2k | 0.04% | $1.1M | trimmed -2% | 2021 Q1 |
| XTX Topco LTD | 242.4k | 0.03% | $889k | opened | 2026 Q1 |
| Two Sigma | 202.9k | 0.03% | $744k | opened | 2026 Q1 |
| Old West Investment Management, LLC | 140.6k | 0.02% | $516k | opened | 2026 Q1 |
| Virtu Financial LLC | 135.7k | 0.02% | $498k | opened | 2024 Q3 |
| Jump Financial | 133.8k | 0.02% | $491k | opened | 2026 Q1 |
| American Century Companies INC | 116.0k | 0.01% | $426k | added +2.1% | 2021 Q2 |
| ION Fund Management LTD | 115.7k | 0.01% | $425k | opened | 2026 Q1 |
| SmartHarvest Portfolios, LLC | 54.5k | <0.01% | $200k | added +49.7% | 2025 Q4 |
| Point72 | 51.2k | <0.01% | $188k | trimmed -7.3% | 2024 Q1 |
| Bank OF America CORP /DE/ | 50.0k | <0.01% | $184k | added +178471.4% | 2019 Q4 |
| Creative Planning | 49.6k | <0.01% | $182k | added +4.5% | 2024 Q4 |
| Private Advisor Group, LLC | 42.8k | <0.01% | $157k | opened | 2026 Q1 |
| Stelac Advisory Services LLC | 40.1k | <0.01% | $147k | opened | 2026 Q1 |
| Ballentine Partners, LLC | 37.1k | <0.01% | $136k | added +4.3% | 2025 Q1 |
| VAN ECK Associates CORP | 30.6k | <0.01% | $112k | added +7.3% | 2025 Q3 |
| Goldman Sachs | 28.4k | <0.01% | $104k | trimmed -68.7% | 2023 Q2 |
| Engineers Gate Manager LP | 23.3k | <0.01% | $85k | opened | 2026 Q1 |
| Rehmann Capital Advisory Group | 20.0k | <0.01% | $73k | opened | 2026 Q1 |
| HighTower Advisors, LLC | 16.9k | <0.01% | $62k | opened | 2026 Q1 |
| Independent Advisor Alliance | 15.7k | <0.01% | $58k | opened | 2026 Q1 |
| Renaissance Technologies | 15.6k | <0.01% | $57k | trimmed -94.1% | 2020 Q4 |
| Quadrant Capital Group LLC | 15.2k | <0.01% | $56k | added +18.4% | 2024 Q4 |
| Centiva Capital, LP | 15.0k | <0.01% | $55k | trimmed -42.1% | 2023 Q2 |
| Cetera Investment Advisers | 14.0k | <0.01% | $51k | opened | 2026 Q1 |
| Signaturefd, LLC | 13.1k | <0.01% | $48k | trimmed -3.1% | 2024 Q4 |
| Millennium Management | 13.1k | <0.01% | $48k | trimmed -65.7% | 2025 Q4 |
| Citigroup INC | 12.2k | <0.01% | $45k | opened | 2025 Q3 |
| Envestnet Asset Management INC | 12.2k | <0.01% | $45k | opened | 2026 Q1 |
| Evergreen Capital Management LLC | 11.8k | <0.01% | $43k | trimmed -20.3% | 2025 Q4 |
| HM Payson & CO | 8.5k | <0.01% | $31k | opened | 2026 Q1 |
| SBI Securities CO., LTD. | 5.1k | <0.01% | $19k | trimmed -1.9% | 2024 Q4 |
| Parallel Advisors, LLC | 3.9k | <0.01% | $14k | trimmed -16% | 2025 Q1 |
| Rhumbline Advisers | 3.8k | <0.01% | $14k | unchanged | 2023 Q2 |
| Steward Partners Investment Advisory, LLC | 3.5k | <0.01% | $13k | opened | 2026 Q1 |
| Allworth Financial LP | 3.5k | <0.01% | $13k | added +303.4% | 2024 Q4 |
| Caitong International Asset Management CO., LTD | 3.3k | <0.01% | $12k | opened | 2025 Q1 |
| Wells Fargo & COMPANY/MN | 2.4k | <0.01% | $9k | added +86.5% | 2019 Q4 |
| BNP Paribas Financial Markets | 2.4k | <0.01% | $9k | opened | 2026 Q1 |
| Gamma Investing LLC | 2.1k | <0.01% | $8k | added +47.3% | 2024 Q1 |
Largest 50 of 63 shown; the full ranked, searchable register is at boothcheck.com/holders/BAK. 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.