Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
356 institutional managers reported holding DUOL for the quarter ended Mar 31, 2026. Together they hold about 77% of shares outstanding; the top 10 hold 44%. 53 opened new positions; 162 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Baillie Gifford | 4.88M | 9.95% | $480.5M | unchanged | 2021 Q3 |
| BlackRock | 3.99M | 8.14% | $392.8M | added +2.2% | 2021 Q3 |
| Vanguard Group | 3.67M | 7.49% | $361.7M | added +1.3% | 2021 Q3 |
| FIL LTD | 1.62M | 3.31% | $159.9M | added +226.2% | 2025 Q3 |
| Two Sigma | 1.40M | 2.85% | $137.5M | added +665.2% | 2022 Q1 |
| Bank OF America CORP /DE/ | 1.33M | 2.72% | $131.3M | added +511.2% | 2021 Q3 |
| Federated Hermes, INC. | 1.25M | 2.56% | $123.5M | added +1320.4% | 2023 Q1 |
| State OF Michigan Retirement System | 1.19M | 2.44% | $117.6M | added +112.9% | 2024 Q2 |
| State Street | 1.18M | 2.42% | $116.6M | added +2.3% | 2021 Q3 |
| UBS | 1.18M | 2.41% | $116.5M | added +196.7% | 2021 Q3 |
| FMR (Fidelity) | 1.09M | 2.23% | $107.7M | trimmed -58.6% | 2021 Q3 |
| Morgan Stanley | 953.8k | 1.95% | $94.0M | added +130.7% | 2021 Q3 |
| Geode Capital | 818.3k | 1.67% | $80.6M | added +0.8% | 2021 Q3 |
| Jane Street | 671.1k | 1.37% | $66.1M | added +40797.3% | 2021 Q4 |
| Renaissance Technologies | 603.8k | 1.23% | $59.5M | added +91.3% | 2022 Q3 |
| Gilder Gagnon Howe & CO LLC | 508.6k | 1.04% | $50.1M | unchanged | 2021 Q3 |
| Quinn Opportunity Partners LLC | 497.4k | 1.01% | $49.0M | added +290.1% | 2025 Q4 |
| BNP Paribas Financial Markets | 484.0k | 0.99% | $47.7M | added +1197.3% | 2024 Q2 |
| Whale Rock Capital (focused) | 471.8k | 0.96% | $46.5M | trimmed -46.2% | 2023 Q1 |
| Amundi | 449.1k | 0.92% | $44.3M | added +1351.7% | 2023 Q2 |
| Voloridge Investment Management | 429.3k | 0.88% | $42.3M | opened | 2026 Q1 |
| Invesco | 358.2k | 0.73% | $35.3M | trimmed -46.4% | 2021 Q4 |
| Goldman Sachs | 352.5k | 0.72% | $34.7M | added +68.9% | 2021 Q3 |
| Northern Trust | 334.5k | 0.68% | $33.0M | added +8.2% | 2021 Q3 |
| Millennium Management | 331.4k | 0.68% | $32.7M | added +23.7% | 2021 Q4 |
| Charles Schwab Investment Management | 306.9k | 0.63% | $30.2M | added +3.2% | 2021 Q3 |
| Carnegie Mellon University (focused) | 294.8k | 0.60% | $29.1M | unchanged | 2021 Q4 |
| D. E. Shaw | 280.4k | 0.57% | $27.6M | added +651.1% | 2022 Q2 |
| Citadel Advisors | 273.9k | 0.56% | $27.0M | trimmed -14.2% | 2021 Q3 |
| BNY Mellon | 249.6k | 0.51% | $24.6M | added +2.6% | 2021 Q3 |
| Citigroup INC | 241.4k | 0.49% | $23.8M | added +31.5% | 2021 Q4 |
| HRT Financial LP | 222.0k | 0.45% | $21.9M | opened | 2025 Q2 |
| Walleye Capital LLC | 176.0k | 0.36% | $17.3M | added +51.4% | 2024 Q1 |
| Capital International Investors | 149.6k | 0.30% | $14.7M | trimmed -51.5% | 2025 Q3 |
| Voleon Capital Management LP | 137.1k | 0.28% | $13.5M | added +335.8% | 2024 Q4 |
| American Century Companies INC | 130.6k | 0.27% | $12.9M | added +15.9% | 2023 Q3 |
| Clear Street Group INC. | 127.9k | 0.26% | $12.6M | added +6297.1% | 2025 Q4 |
| Trexquant Investment LP | 126.5k | 0.26% | $12.5M | added +5.6% | 2025 Q2 |
| Rhumbline Advisers | 122.5k | 0.25% | $12.1M | added +1.3% | 2022 Q2 |
| Dimensional Fund Advisors | 115.4k | 0.24% | $11.4M | trimmed -38.2% | 2023 Q2 |
| AQR Capital | 110.0k | 0.23% | $10.8M | trimmed -85.8% | 2023 Q1 |
| Nantahala Capital Management, LLC | 100.0k | 0.20% | $9.9M | opened | 2026 Q1 |
| First Trust Advisors LP | 99.4k | 0.20% | $9.8M | trimmed -18.4% | 2022 Q2 |
| Capital Fund Management S.a. | 97.9k | 0.20% | $9.7M | trimmed -19.1% | 2022 Q4 |
| Mitsubishi UFJ Asset Management CO., LTD. | 95.5k | 0.20% | $9.4M | added +12.6% | 2021 Q3 |
| Tudor Investment | 94.4k | 0.19% | $9.3M | opened | 2025 Q2 |
| IMC-Chicago, LLC | 90.1k | 0.18% | $8.9M | opened | 2025 Q3 |
| Principal Financial Group INC | 90.0k | 0.18% | $8.9M | added +5.1% | 2022 Q2 |
| Jasper Ridge Partners, L.p. | 87.1k | 0.18% | $8.6M | unchanged | 2022 Q1 |
| Nuveen | 80.8k | 0.17% | $8.0M | added +9.4% | 2022 Q2 |
Largest 50 of 356 shown; the full ranked, searchable register is at boothcheck.com/holders/DUOL. 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.