Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
327 institutional managers reported holding FSLY for the quarter ended Mar 31, 2026. Together they hold about 90% of shares outstanding; the top 10 hold 49%. 118 opened new positions; 38 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 18.12M | 11.80% | $526.7M | added +6.7% | 2019 Q2 |
| BlackRock | 12.44M | 8.10% | $361.5M | trimmed -3.1% | 2019 Q3 |
| FMR (Fidelity) | 8.64M | 5.62% | $251.0M | added +711.8% | 2019 Q2 |
| Legal & General Group PLC | 8.06M | 5.25% | $234.2M | trimmed -6.3% | 2020 Q1 |
| First Trust Advisors LP | 7.03M | 4.58% | $204.3M | added +100.5% | 2020 Q2 |
| Two Sigma | 5.61M | 3.66% | $163.2M | added +79.8% | 2020 Q3 |
| Voya Investment Management LLC | 3.93M | 2.56% | $114.2M | added +285.6% | 2020 Q2 |
| Capital Group (American Funds) | 3.75M | 2.44% | $109.1M | opened | 2026 Q1 |
| Geode Capital | 3.58M | 2.33% | $104.0M | added +2.9% | 2019 Q2 |
| Penserra Capital Management LLC | 3.54M | 2.30% | $102.8M | trimmed -39.3% | 2024 Q1 |
| State Street | 3.25M | 2.12% | $94.6M | added +2.9% | 2019 Q3 |
| Point72 | 3.15M | 2.05% | $91.5M | trimmed -11.4% | 2024 Q1 |
| Dimensional Fund Advisors | 2.74M | 1.78% | $79.7M | unchanged | 2022 Q3 |
| D. E. Shaw | 2.62M | 1.71% | $76.3M | added +313.9% | 2019 Q3 |
| Jane Street | 2.54M | 1.65% | $73.8M | added +4040.4% | 2019 Q2 |
| Fuller & Thaler Asset Management, INC. | 2.16M | 1.41% | $62.8M | added +4908% | 2025 Q4 |
| T. Rowe Price | 2.11M | 1.37% | $61.3M | added +1209.6% | 2020 Q1 |
| T. Rowe Price Investment Management, INC. | 2.06M | 1.34% | $59.9M | added +380.2% | 2025 Q4 |
| Nordea Investment Management AB | 2.06M | 1.34% | $59.8M | opened | 2026 Q1 |
| Nuveen | 1.86M | 1.21% | $54.1M | added +7.7% | 2020 Q2 |
| Northern Trust | 1.65M | 1.08% | $48.1M | added +9% | 2019 Q2 |
| HRT Financial LP | 1.55M | 1.01% | $44.9M | opened | 2026 Q1 |
| UBS | 1.51M | 0.98% | $43.9M | added +87.4% | 2019 Q2 |
| Morgan Stanley | 1.46M | 0.95% | $42.4M | trimmed -82.5% | 2019 Q2 |
| Millennium Management | 1.41M | 0.92% | $41.1M | added +249.6% | 2019 Q2 |
| Connor, Clark & Lunn Investment Management LTD. | 1.39M | 0.91% | $40.5M | added +37.1% | 2025 Q1 |
| Lord, Abbett & CO. LLC | 1.39M | 0.90% | $40.3M | opened | 2026 Q1 |
| Bank OF America CORP /DE/ | 1.27M | 0.83% | $36.9M | added +166.2% | 2019 Q2 |
| Goldman Sachs | 1.18M | 0.77% | $34.2M | trimmed -28.8% | 2019 Q2 |
| Charles Schwab Investment Management | 1.16M | 0.75% | $33.6M | trimmed -0.7% | 2020 Q2 |
| Oberweis Asset Management INC/ | 1.07M | 0.70% | $31.1M | added +55.3% | 2025 Q4 |
| Tudor Investment | 1.04M | 0.68% | $30.1M | added +226.7% | 2019 Q4 |
| Algert Global LLC | 923.9k | 0.60% | $26.8M | trimmed -48.9% | 2025 Q2 |
| Invesco | 891.3k | 0.58% | $25.9M | added +118.4% | 2020 Q2 |
| Driehaus Capital Management LLC | 838.3k | 0.55% | $24.4M | trimmed -39.5% | 2025 Q4 |
| Squarepoint Ops LLC | 825.7k | 0.54% | $24.0M | added +23.4% | 2020 Q2 |
| Canada Life Assurance CO | 733.2k | 0.48% | $21.3M | trimmed -61.2% | 2019 Q4 |
| BNY Mellon | 703.8k | 0.46% | $20.5M | trimmed -53.5% | 2019 Q4 |
| SG Americas Securities, LLC | 685.4k | 0.45% | $19.9M | added +98.2% | 2020 Q2 |
| GMT Capital CORP | 598.8k | 0.39% | $17.4M | opened | 2024 Q2 |
| Renaissance Technologies | 518.4k | 0.34% | $15.1M | trimmed -18.7% | 2025 Q2 |
| Deutsche Bank AG\ | 514.8k | 0.34% | $15.0M | added +279.6% | 2019 Q2 |
| Mirae Asset Global Etfs Holdings LTD. | 500.1k | 0.33% | $14.5M | added +14% | 2020 Q3 |
| Citadel Advisors | 460.3k | 0.30% | $13.4M | trimmed -77.1% | 2019 Q2 |
| Raymond James Financial INC | 448.8k | 0.29% | $13.0M | added +896.8% | 2019 Q3 |
| Jump Financial | 417.6k | 0.27% | $12.1M | added +30.2% | 2025 Q2 |
| Berkshire Capital Holdings INC | 403.8k | 0.26% | $11.7M | opened | 2026 Q1 |
| Summit Partners Public Asset Management, LLC | 391.5k | 0.26% | $11.4M | opened | 2026 Q1 |
| Neuberger Berman Group LLC | 326.7k | 0.21% | $9.5M | opened | 2026 Q1 |
| AQR Capital | 315.1k | 0.20% | $9.2M | added +20.6% | 2025 Q1 |
Largest 50 of 327 shown; the full ranked, searchable register is at boothcheck.com/holders/FSLY. 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.