Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
698 institutional managers reported holding MRNA for the quarter ended Mar 31, 2026. Together they hold about 78% of shares outstanding; the top 10 hold 52%. 139 opened new positions; 99 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 45.67M | 11.56% | $2.32B | added +62.9% | 2018 Q4 |
| Vanguard Group | 41.64M | 10.54% | $2.12B | unchanged | 2018 Q4 |
| BlackRock | 29.64M | 7.50% | $1.51B | trimmed -8.8% | 2018 Q4 |
| Baillie Gifford | 19.99M | 5.06% | $1.02B | trimmed -2.9% | 2018 Q4 |
| Capital Group (American Funds) | 18.70M | 4.73% | $950.2M | added +45.8% | 2025 Q4 |
| State Street | 14.86M | 3.76% | $755.3M | trimmed -9.2% | 2019 Q1 |
| Geode Capital | 9.44M | 2.39% | $479.5M | added +2.3% | 2018 Q4 |
| Two Sigma | 9.09M | 2.30% | $461.8M | added +23.8% | 2023 Q1 |
| Morgan Stanley | 8.47M | 2.15% | $430.5M | trimmed -4.5% | 2018 Q4 |
| Theleme Partners LLP (focused) | 8.05M | 2.04% | $409.0M | unchanged | 2018 Q4 |
| Goldman Sachs | 6.60M | 1.67% | $335.6M | added +67.2% | 2018 Q4 |
| UBS | 6.03M | 1.53% | $306.4M | added +6.2% | 2018 Q4 |
| Invesco | 4.78M | 1.21% | $243.2M | trimmed -31.9% | 2019 Q1 |
| Charles Schwab Investment Management | 4.73M | 1.20% | $240.6M | added +2.4% | 2019 Q3 |
| Flagship Pioneering, LLC (focused) | 4.63M | 1.17% | $235.4M | unchanged | 2018 Q4 |
| BNP Paribas Financial Markets | 4.35M | 1.10% | $221.2M | added +4% | 2019 Q2 |
| Alyeska Investment Group | 4.05M | 1.03% | $205.9M | added +25.5% | 2025 Q4 |
| Northern Trust | 2.95M | 0.75% | $150.0M | trimmed -1.7% | 2019 Q1 |
| Banque Pictet & CIE SA | 2.75M | 0.70% | $139.7M | trimmed -12.2% | 2019 Q2 |
| First Trust Advisors LP | 2.39M | 0.61% | $121.6M | added +59.3% | 2020 Q1 |
| Wellington Management | 2.36M | 0.60% | $119.8M | added +2730.4% | 2020 Q3 |
| Merck & CO., INC. (focused) | 2.31M | 0.58% | $117.3M | unchanged | 2024 Q4 |
| Dimensional Fund Advisors | 2.13M | 0.54% | $108.4M | added +19.2% | 2019 Q3 |
| Federated Hermes, INC. | 1.98M | 0.50% | $100.5M | trimmed -9.2% | 2019 Q4 |
| National Bank OF Canada /FI/ | 1.82M | 0.46% | $92.3M | trimmed -15.7% | 2021 Q4 |
| BNY Mellon | 1.69M | 0.43% | $85.9M | trimmed -2.2% | 2019 Q1 |
| Citigroup INC | 1.48M | 0.38% | $75.2M | trimmed -23.6% | 2019 Q1 |
| Douglas Lane & Associates, LLC | 1.31M | 0.33% | $66.6M | added +1.5% | 2021 Q2 |
| Nuveen | 1.08M | 0.27% | $54.8M | trimmed -4.1% | 2019 Q2 |
| Millennium Management | 1.02M | 0.26% | $51.8M | added +152.5% | 2020 Q1 |
| Royal Bank OF Canada | 999.3k | 0.25% | $50.8M | trimmed -12.6% | 2018 Q4 |
| Allianz Asset Management GmbH | 992.8k | 0.25% | $50.5M | added +4522% | 2019 Q3 |
| Bank OF America CORP /DE/ | 986.4k | 0.25% | $50.1M | trimmed -28.3% | 2018 Q4 |
| Barclays PLC | 932.3k | 0.24% | $47.4M | trimmed -39.6% | 2019 Q1 |
| Amundi | 904.8k | 0.23% | $46.0M | trimmed -20.9% | 2019 Q1 |
| Renaissance Technologies | 881.2k | 0.22% | $44.8M | added +55% | 2024 Q1 |
| Deutsche Bank AG\ | 810.3k | 0.20% | $41.2M | trimmed -27.7% | 2019 Q1 |
| Mitsubishi UFJ Asset Management CO., LTD. | 765.5k | 0.19% | $38.9M | added +43.3% | 2019 Q1 |
| Lingotto Investment Management LLP (focused) | 763.9k | 0.19% | $38.8M | added +53.2% | 2023 Q2 |
| Legal & General Group PLC | 750.8k | 0.19% | $38.2M | trimmed -19.9% | 2018 Q4 |
| Letko, Brosseau & Associates INC | 748.8k | 0.19% | $38.1M | added +3.1% | 2023 Q4 |
| T. Rowe Price | 738.6k | 0.19% | $37.5M | added +49.5% | 2018 Q4 |
| Russell Investments Group, LTD. | 710.6k | 0.18% | $36.1M | added +104.7% | 2020 Q1 |
| Qube Research & Technologies LTD | 700.7k | 0.18% | $35.6M | opened | 2026 Q1 |
| Swiss National Bank | 696.1k | 0.18% | $35.4M | unchanged | 2020 Q2 |
| Pictet Asset Management Holding SA | 676.1k | 0.17% | $34.4M | trimmed -8.4% | 2018 Q4 |
| D. E. Shaw | 666.5k | 0.17% | $33.9M | trimmed -87.1% | 2019 Q2 |
| Step Capital Management Pte. LTD. (focused) | 645.0k | 0.16% | $32.8M | unchanged | 2025 Q4 |
| CalPERS | 628.2k | 0.16% | $31.9M | added +31.1% | 2019 Q3 |
| Capital Fund Management S.a. | 569.9k | 0.14% | $29.0M | trimmed -39.2% | 2024 Q1 |
Largest 50 of 698 shown; the full ranked, searchable register is at boothcheck.com/holders/MRNA. 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.