Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
290 institutional managers reported holding EXTR for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 53%. 39 opened new positions; 57 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 20.50M | 15.34% | $309.3M | added +7.2% | ≤2013 |
| BlackRock | 20.19M | 15.11% | $304.7M | added +3.8% | ≤2013 |
| State Street | 6.45M | 4.83% | $97.3M | added +13.9% | ≤2013 |
| Paradigm Capital Management INC/NY | 5.23M | 3.92% | $79.0M | added +5.3% | ≤2013 |
| Geode Capital | 3.33M | 2.49% | $50.2M | added +3.4% | ≤2013 |
| FMR (Fidelity) | 3.32M | 2.49% | $50.2M | added +10.8% | 2016 Q2 |
| Arrowstreet Capital | 3.25M | 2.43% | $49.0M | added +7.6% | 2024 Q4 |
| Goldman Sachs | 3.13M | 2.34% | $47.2M | added +12.9% | ≤2013 |
| Trigran Investments, INC. (focused) | 2.85M | 2.13% | $43.0M | added +24.6% | 2024 Q1 |
| Alyeska Investment Group | 2.79M | 2.09% | $42.1M | trimmed -6.2% | 2023 Q4 |
| Loomis Sayles & CO L P | 2.72M | 2.03% | $41.0M | added +9.1% | 2025 Q3 |
| Barrow Hanley Mewhinney & Strauss LLC | 2.65M | 1.99% | $40.0M | trimmed -6% | 2023 Q4 |
| Pacer Advisors, INC. | 2.35M | 1.76% | $35.5M | added +11% | 2021 Q3 |
| Southernsun Asset Management, LLC (focused) | 2.30M | 1.72% | $34.7M | added +16.6% | 2025 Q1 |
| Renaissance Technologies | 2.08M | 1.55% | $31.3M | added +32.6% | ≤2013 |
| Morgan Stanley | 1.79M | 1.34% | $27.1M | unchanged | ≤2013 |
| Victory Capital Management INC | 1.69M | 1.26% | $25.5M | trimmed -58.4% | 2018 Q4 |
| AllianceBernstein | 1.60M | 1.20% | $24.2M | added +13.9% | ≤2013 |
| Nuveen | 1.58M | 1.18% | $23.8M | trimmed -17.3% | 2019 Q2 |
| Charles Schwab Investment Management | 1.49M | 1.12% | $22.6M | added +1.2% | ≤2013 |
| D. E. Shaw | 1.47M | 1.10% | $22.2M | added +2.6% | 2015 Q3 |
| Northern Trust | 1.40M | 1.05% | $21.2M | added +2.5% | ≤2013 |
| Shannon River Fund Management LLC (focused) | 1.31M | 0.98% | $19.8M | trimmed -31.1% | 2025 Q4 |
| Federated Hermes, INC. | 1.05M | 0.79% | $15.9M | added +13.2% | 2021 Q1 |
| Acadian Asset Management | 999.5k | 0.75% | $15.1M | added +195.6% | 2025 Q2 |
| Impax Asset Management Group plc | 965.2k | 0.72% | $14.6M | added +2.1% | 2020 Q4 |
| Cooper Creek Partners Management LLC | 838.2k | 0.63% | $12.6M | unchanged | 2021 Q4 |
| Ameriprise Financial INC | 817.5k | 0.61% | $12.3M | trimmed -13.3% | ≤2013 |
| SEB Asset Management AB | 808.5k | 0.60% | $12.2M | opened | 2026 Q1 |
| Bank OF America CORP /DE/ | 757.1k | 0.57% | $11.4M | added +73.5% | ≤2013 |
| BNY Mellon | 742.9k | 0.56% | $11.2M | trimmed -8.9% | ≤2013 |
| Public Sector Pension Investment Board | 726.4k | 0.54% | $11.0M | added +2.5% | 2018 Q1 |
| Connor, Clark & Lunn Investment Management LTD. | 720.9k | 0.54% | $10.9M | added +14% | 2022 Q3 |
| Trexquant Investment LP | 695.7k | 0.52% | $10.5M | added +30.9% | 2021 Q1 |
| UBS | 676.4k | 0.51% | $10.2M | added +44.6% | ≤2013 |
| Glenmede Trust CO NA | 671.7k | 0.50% | $10.1M | opened | 2026 Q1 |
| Invesco | 666.9k | 0.50% | $10.1M | trimmed -42.9% | ≤2013 |
| Deutsche Bank AG\ | 659.2k | 0.49% | $9.9M | trimmed -17.3% | ≤2013 |
| Principal Financial Group INC | 656.5k | 0.49% | $9.9M | added +2.7% | 2015 Q3 |
| Defiance ETFs, LLC | 610.7k | 0.46% | $9.2M | added +38.7% | 2025 Q4 |
| Penserra Capital Management LLC | 610.7k | 0.46% | $9.2M | added +38.7% | 2025 Q2 |
| Lyell Wealth Management, LP | 582.3k | 0.44% | $8.8M | unchanged | 2020 Q1 |
| OP Asset Management LTD | 542.0k | 0.41% | $8.2M | opened | 2026 Q1 |
| Raymond James Financial INC | 540.4k | 0.41% | $8.2M | trimmed -1.6% | 2016 Q3 |
| Clearbridge Investments, LLC | 510.1k | 0.38% | $7.7M | trimmed -3% | 2022 Q2 |
| Engineers Gate Manager LP | 509.2k | 0.38% | $7.7M | added +39.6% | 2018 Q2 |
| Citadel Advisors | 503.2k | 0.38% | $7.6M | added +530.5% | ≤2013 |
| BNP Paribas Financial Markets | 472.1k | 0.35% | $7.1M | trimmed -44% | 2014 Q3 |
| Panagora Asset Management INC | 463.1k | 0.35% | $7.0M | added +262.3% | 2021 Q1 |
| Polar Asset Management Partners INC. | 461.6k | 0.35% | $7.0M | opened | 2026 Q1 |
Largest 50 of 290 shown; the full ranked, searchable register is at boothcheck.com/holders/EXTR. 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.