Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
270 institutional managers reported holding GSAT for the quarter ended Mar 31, 2026. Together they hold about 24% of shares outstanding; the top 10 hold 15%. 53 opened new positions; 39 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 5.14M | 4.00% | $341.6M | added +1.5% | 2014 Q2 |
| BlackRock | 4.00M | 3.12% | $265.9M | trimmed -4.7% | 2014 Q2 |
| Greenhouse Funds Lllp (focused) | 2.20M | 1.71% | $146.2M | trimmed -1.1% | 2023 Q3 |
| State Street | 1.54M | 1.20% | $102.2M | added +14.5% | 2014 Q2 |
| American Century Companies INC | 1.51M | 1.18% | $100.2M | added +4% | 2024 Q4 |
| Geode Capital | 1.45M | 1.13% | $96.5M | added +13.2% | 2014 Q2 |
| Beck Mack & Oliver LLC | 1.12M | 0.87% | $74.2M | trimmed -1.9% | ≤2013 |
| VAN ECK Associates CORP | 974.3k | 0.76% | $64.7M | added +66.7% | 2022 Q2 |
| FMR (Fidelity) | 909.0k | 0.71% | $60.4M | trimmed -12.5% | 2014 Q2 |
| Ashford Capital Management INC | 907.5k | 0.71% | $60.3M | trimmed -9.2% | 2023 Q3 |
| Senvest Management, LLC (focused) | 868.9k | 0.68% | $57.7M | added +27.7% | 2025 Q1 |
| Broad Bay Capital Management, LP (focused) | 701.5k | 0.55% | $46.6M | added +26% | 2025 Q2 |
| UBS | 581.0k | 0.45% | $38.6M | trimmed -9.6% | 2014 Q2 |
| Susquehanna International Group | 508.7k | 0.40% | $33.8M | added +167.9% | 2019 Q3 |
| Northern Trust | 458.7k | 0.36% | $30.5M | added +2.5% | 2014 Q2 |
| American Alpha Advisors, LLC | 433.3k | 0.34% | $28.8M | unchanged | 2024 Q3 |
| Penserra Capital Management LLC | 421.6k | 0.33% | $28.0M | trimmed -1.9% | 2021 Q2 |
| Charles Schwab Investment Management | 417.2k | 0.33% | $27.7M | trimmed -1.7% | 2014 Q2 |
| Voya Investment Management LLC | 334.7k | 0.26% | $22.2M | added +3612.7% | 2021 Q2 |
| Softbank Group CORP. (focused) | 321.0k | 0.25% | $21.3M | unchanged | 2023 Q3 |
| Ameriprise Financial INC | 299.7k | 0.23% | $19.9M | added +2.1% | 2025 Q4 |
| Bank OF America CORP /DE/ | 290.5k | 0.23% | $19.3M | trimmed -4.9% | 2014 Q2 |
| Raymond James Financial INC | 253.2k | 0.20% | $16.8M | added +1165.1% | 2016 Q1 |
| Sculptor Capital | 237.0k | 0.18% | $15.7M | opened | 2026 Q1 |
| Dimensional Fund Advisors | 231.7k | 0.18% | $15.4M | added +7.4% | 2024 Q1 |
| Magnus Financial Group LLC | 229.1k | 0.18% | $15.2M | unchanged | 2021 Q2 |
| Goldman Sachs | 225.8k | 0.18% | $15.0M | trimmed -45.9% | 2014 Q2 |
| Essex Investment Management CO LLC | 165.7k | 0.13% | $11.0M | trimmed -1% | 2025 Q3 |
| Robertson Stephens Wealth Management, LLC | 163.5k | 0.13% | $10.9M | added +6.2% | 2021 Q1 |
| Nuveen | 161.9k | 0.13% | $10.8M | added +1.2% | 2020 Q4 |
| Anson Funds Management LP | 158.2k | 0.12% | $10.5M | added +216.4% | 2023 Q4 |
| First Trust Advisors LP | 156.9k | 0.12% | $10.4M | trimmed -16.5% | 2025 Q4 |
| BNY Mellon | 148.6k | 0.12% | $9.9M | trimmed -4% | 2014 Q2 |
| Defiance ETFs, LLC | 142.6k | 0.11% | $9.5M | trimmed -54.8% | 2025 Q4 |
| Tudor Investment | 126.4k | 0.10% | $8.4M | opened | 2026 Q1 |
| Legal & General Group PLC | 125.2k | 0.10% | $8.3M | trimmed -11.8% | 2014 Q3 |
| D. E. Shaw | 110.5k | 0.09% | $7.3M | trimmed -28.6% | 2023 Q2 |
| Nordea Investment Management AB | 108.0k | 0.08% | $7.2M | trimmed -4.1% | 2025 Q2 |
| Swiss National Bank | 99.9k | 0.08% | $6.6M | unchanged | 2015 Q2 |
| 683 Capital Management, LLC | 98.0k | 0.08% | $6.5M | trimmed -16.2% | 2018 Q3 |
| Voleon Capital Management LP | 89.1k | 0.07% | $5.9M | added +74% | 2025 Q4 |
| Arrowstreet Capital | 85.5k | 0.07% | $5.7M | trimmed -36.1% | 2025 Q4 |
| Jump Financial | 82.6k | 0.06% | $5.5M | opened | 2026 Q1 |
| Morgan Stanley | 81.1k | 0.06% | $5.4M | trimmed -68.5% | 2014 Q2 |
| Linden Thomas Advisory Services, LLC | 75.5k | 0.06% | $5.0M | added +0.6% | 2023 Q2 |
| Wells Fargo & COMPANY/MN | 71.5k | 0.06% | $4.7M | trimmed -28.4% | 2014 Q2 |
| Plustick Management LLC (focused) | 70.0k | 0.06% | $4.6M | trimmed -57.6% | 2021 Q4 |
| T. Rowe Price | 69.9k | 0.05% | $4.6M | trimmed -87.1% | 2016 Q3 |
| Sovran Advisors, LLC | 66.5k | 0.05% | $4.4M | unchanged | 2025 Q1 |
| Commonwealth OF Pennsylvania Public School Empls Retrmt SYS | 66.2k | 0.05% | $4.4M | trimmed -7.9% | 2025 Q4 |
Largest 50 of 270 shown; the full ranked, searchable register is at boothcheck.com/holders/GSAT. 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.