Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
353 institutional managers reported holding SAM for the quarter ended Mar 31, 2026. Together they hold about 74% of shares outstanding; the top 10 hold 40%. 67 opened new positions; 52 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 1.04M | 9.90% | $237.8M | unchanged | ≤2013 |
| BlackRock | 770.3k | 7.36% | $176.8M | added +6.2% | ≤2013 |
| AQR Capital | 652.0k | 6.23% | $149.6M | added +48.1% | ≤2013 |
| American Century Companies INC | 288.1k | 2.75% | $66.1M | added +50.4% | ≤2013 |
| Dimensional Fund Advisors | 273.6k | 2.61% | $62.8M | added +6.1% | ≤2013 |
| State Street | 255.2k | 2.44% | $58.6M | unchanged | ≤2013 |
| Arrowstreet Capital | 245.2k | 2.34% | $56.3M | trimmed -9.7% | 2025 Q1 |
| UBS | 234.5k | 2.24% | $53.8M | added +0.9% | ≤2013 |
| Quantinno Capital Management LP | 230.6k | 2.20% | $52.9M | added +155.2% | 2023 Q3 |
| FMR (Fidelity) | 195.4k | 1.87% | $44.8M | trimmed -45.9% | ≤2013 |
| Gotham Asset Management | 170.3k | 1.63% | $39.1M | trimmed -31.6% | 2020 Q3 |
| Global Alpha Capital Management LTD. | 147.5k | 1.41% | $33.9M | added +19.9% | 2024 Q4 |
| Goldman Sachs | 145.0k | 1.39% | $33.3M | added +160.2% | ≤2013 |
| Geode Capital | 142.1k | 1.36% | $32.6M | added +2.1% | ≤2013 |
| Morgan Stanley | 134.5k | 1.28% | $30.9M | added +17.7% | ≤2013 |
| Southeastern Asset Management INC/TN/ (focused) | 118.4k | 1.13% | $27.2M | trimmed -20% | 2023 Q1 |
| Invesco | 115.6k | 1.10% | $26.5M | trimmed -1.3% | ≤2013 |
| Qube Research & Technologies LTD | 111.3k | 1.06% | $25.5M | trimmed -16.2% | 2022 Q4 |
| Charles Schwab Investment Management | 107.0k | 1.02% | $24.6M | added +8.3% | ≤2013 |
| Millennium Management | 96.6k | 0.92% | $22.2M | added +69.9% | 2016 Q3 |
| Renaissance Technologies | 93.8k | 0.90% | $21.5M | added +13.4% | 2023 Q3 |
| Ameriprise Financial INC | 91.5k | 0.87% | $21.0M | added +0.7% | ≤2013 |
| Woodson Capital Management, LP (focused) | 90.0k | 0.86% | $20.7M | trimmed -10% | 2025 Q4 |
| Northern Trust | 79.0k | 0.76% | $18.1M | added +5.5% | ≤2013 |
| T. Rowe Price Investment Management, INC. | 78.5k | 0.75% | $18.0M | added +327183.3% | 2022 Q3 |
| Man Group | 77.5k | 0.74% | $17.8M | added +8.7% | 2018 Q1 |
| Southernsun Asset Management, LLC (focused) | 74.8k | 0.71% | $17.2M | trimmed -0.9% | 2021 Q4 |
| Calamos Advisors LLC | 68.1k | 0.65% | $15.6M | added +4.2% | 2024 Q3 |
| Loomis Sayles & CO L P | 63.5k | 0.61% | $14.6M | trimmed -2.4% | 2022 Q1 |
| BNY Mellon | 57.0k | 0.55% | $13.1M | trimmed -5.5% | ≤2013 |
| Franklin Resources | 55.6k | 0.53% | $12.8M | trimmed -15.1% | 2020 Q2 |
| Citadel Advisors | 53.2k | 0.51% | $12.2M | trimmed -60% | ≤2013 |
| First Trust Advisors LP | 51.7k | 0.49% | $11.9M | added +34.8% | 2023 Q3 |
| D. E. Shaw | 46.6k | 0.45% | $10.7M | trimmed -13.3% | ≤2013 |
| Marshall Wace | 45.6k | 0.44% | $10.5M | added +69.6% | 2022 Q4 |
| Corient Private Wealth LLC | 45.4k | 0.43% | $10.4M | added +68.4% | 2024 Q4 |
| Prescott General Partners LLC (focused) | 45.0k | 0.43% | $10.3M | opened | 2026 Q1 |
| Bank OF America CORP /DE/ | 44.4k | 0.42% | $10.2M | trimmed -5.1% | ≤2013 |
| Crawford Fund Management, LLC (focused) | 39.4k | 0.38% | $9.0M | trimmed -35.9% | 2023 Q4 |
| IEQ Capital, LLC | 36.9k | 0.35% | $8.5M | added +52.4% | 2024 Q3 |
| Winton Group | 32.7k | 0.31% | $7.5M | added +11% | 2024 Q4 |
| Trexquant Investment LP | 29.8k | 0.28% | $6.8M | trimmed -46.9% | 2022 Q3 |
| Gamco Investors, INC. et al | 28.1k | 0.27% | $6.4M | unchanged | ≤2013 |
| Nomura Asset Management International INC. | 27.2k | 0.26% | $6.2M | trimmed -41.6% | 2024 Q2 |
| Creative Planning | 26.5k | 0.25% | $6.1M | added +122.4% | 2018 Q2 |
| GAMCO (Gabelli) | 26.4k | 0.25% | $6.1M | trimmed -2.2% | ≤2013 |
| Susquehanna International Group | 26.1k | 0.25% | $6.0M | added +40.9% | 2019 Q1 |
| Algert Global LLC | 24.6k | 0.23% | $5.6M | trimmed -0.5% | 2021 Q2 |
| Acadian Asset Management | 24.6k | 0.23% | $5.6M | trimmed -15.4% | 2025 Q2 |
| Rhumbline Advisers | 23.3k | 0.22% | $5.3M | added +0.7% | ≤2013 |
Largest 50 of 353 shown; the full ranked, searchable register is at boothcheck.com/holders/SAM. 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.