Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
853 institutional managers reported holding RKLB for the quarter ended Mar 31, 2026. Together they hold about 46% of shares outstanding; the top 10 hold 27%. 144 opened new positions; 84 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 54.48M | 9.00% | $3.50B | added +14.8% | 2021 Q4 |
| BlackRock | 37.99M | 6.27% | $2.44B | added +14.8% | 2021 Q4 |
| Baillie Gifford | 18.43M | 3.04% | $1.18B | added +3.2% | 2025 Q2 |
| State Street | 13.92M | 2.30% | $893.9M | added +11.2% | 2021 Q4 |
| Geode Capital | 10.57M | 1.75% | $678.6M | added +17.4% | 2021 Q3 |
| Capital Group (American Funds) | 7.24M | 1.20% | $464.9M | trimmed -55.3% | 2025 Q2 |
| Capital International Investors | 6.70M | 1.11% | $430.2M | opened | 2026 Q1 |
| Defiance ETFs, LLC | 5.63M | 0.93% | $361.2M | added +18556.6% | 2025 Q4 |
| Morgan Stanley | 5.38M | 0.89% | $345.6M | added +28.3% | 2021 Q3 |
| Bank OF America CORP /DE/ | 4.53M | 0.75% | $291.0M | trimmed -11.3% | 2021 Q3 |
| UBS | 4.47M | 0.74% | $286.7M | trimmed -2.9% | 2021 Q3 |
| D. E. Shaw | 4.19M | 0.69% | $269.1M | trimmed -36.9% | 2022 Q2 |
| FMR (Fidelity) | 3.69M | 0.61% | $237.2M | trimmed -13.5% | 2022 Q2 |
| Invesco | 3.60M | 0.59% | $231.0M | trimmed -31.6% | 2021 Q4 |
| Westfield Capital Management CO LP | 3.17M | 0.52% | $203.7M | added +22.4% | 2024 Q4 |
| Northern Trust | 3.09M | 0.51% | $198.4M | added +18.7% | 2021 Q4 |
| Goldman Sachs | 2.56M | 0.42% | $164.1M | added +136.7% | 2021 Q3 |
| Charles Schwab Investment Management | 2.36M | 0.39% | $151.4M | added +6.5% | 2021 Q4 |
| ARK Investment Management | 2.24M | 0.37% | $144.0M | unchanged | 2022 Q1 |
| Voya Investment Management LLC | 2.24M | 0.37% | $143.8M | added +2.1% | 2022 Q2 |
| Royal Bank OF Canada | 2.19M | 0.36% | $140.3M | trimmed -10.7% | 2021 Q3 |
| American Century Companies INC | 2.15M | 0.35% | $137.8M | trimmed -15% | 2021 Q3 |
| Marshall Wace | 1.88M | 0.31% | $120.8M | added +1212% | 2025 Q4 |
| Franklin Resources | 1.86M | 0.31% | $119.6M | trimmed -1.8% | 2024 Q3 |
| BNY Mellon | 1.79M | 0.30% | $114.9M | added +14.3% | 2021 Q4 |
| Amundi | 1.78M | 0.29% | $114.5M | added +57.5% | 2024 Q4 |
| T. Rowe Price | 1.75M | 0.29% | $112.4M | added +6.2% | 2022 Q2 |
| AllianceBernstein | 1.74M | 0.29% | $111.8M | trimmed -18.5% | 2022 Q2 |
| Voloridge Investment Management | 1.70M | 0.28% | $109.0M | added +34.7% | 2024 Q4 |
| Jane Street | 1.69M | 0.28% | $108.3M | added +4402.9% | 2021 Q3 |
| Legal & General Group PLC | 1.59M | 0.26% | $102.0M | added +52.3% | 2021 Q4 |
| Sumitomo Mitsui Trust Group, INC. | 1.52M | 0.25% | $97.4M | added +12.1% | 2022 Q3 |
| Nuveen | 1.51M | 0.25% | $97.2M | added +33.8% | 2022 Q2 |
| Swiss National Bank | 1.41M | 0.23% | $90.6M | added +17.8% | 2021 Q4 |
| Mitsubishi UFJ Asset Management CO., LTD. | 1.30M | 0.21% | $83.3M | added +7.3% | 2022 Q2 |
| VAN ECK Associates CORP | 1.25M | 0.21% | $80.2M | added +41.1% | 2022 Q4 |
| First Trust Advisors LP | 1.18M | 0.20% | $75.8M | trimmed -20.1% | 2023 Q1 |
| Mizuho Markets Americas LLC | 1.18M | 0.20% | $75.7M | added +1.9% | 2024 Q2 |
| Dimensional Fund Advisors | 1.05M | 0.17% | $67.7M | trimmed -8.1% | 2023 Q3 |
| Zevenbergen Capital Investments LLC | 1.02M | 0.17% | $65.8M | trimmed -6% | 2025 Q1 |
| Deutsche Bank AG\ | 1.01M | 0.17% | $65.1M | trimmed -56.6% | 2021 Q3 |
| Citigroup INC | 998.6k | 0.17% | $64.1M | added +63.1% | 2021 Q4 |
| Ameriprise Financial INC | 990.7k | 0.16% | $63.6M | added +19.7% | 2024 Q4 |
| Vident Advisory, LLC | 975.5k | 0.16% | $62.6M | added +16.7% | 2021 Q4 |
| Connor, Clark & Lunn Investment Management LTD. | 935.2k | 0.15% | $60.0M | added +159.2% | 2024 Q4 |
| Neuberger Berman Group LLC | 934.2k | 0.15% | $60.0M | added +13.7% | 2021 Q3 |
| Tocqueville Asset Management L.p. | 933.3k | 0.15% | $59.9M | trimmed -7.5% | 2023 Q2 |
| Citadel Advisors | 816.7k | 0.14% | $52.4M | trimmed -7.2% | 2021 Q3 |
| Penserra Capital Management LLC | 815.9k | 0.14% | $52.4M | added +309.1% | 2021 Q3 |
| Raymond James Financial INC | 810.8k | 0.13% | $52.0M | added +18.7% | 2021 Q3 |
Largest 50 of 853 shown; the full ranked, searchable register is at boothcheck.com/holders/RKLB. 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.