Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
435 institutional managers reported holding FSS for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 47%. 72 opened new positions; 53 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 9.07M | 14.74% | $981.1M | added +0.7% | ≤2013 |
| Vanguard Group | 6.89M | 11.20% | $745.2M | added +0.6% | ≤2013 |
| State Street | 2.31M | 3.75% | $249.7M | added +2.8% | ≤2013 |
| Capital Group (American Funds) | 2.19M | 3.55% | $236.5M | trimmed -7.5% | 2024 Q4 |
| Geode Capital | 1.80M | 2.92% | $194.5M | added +4.1% | ≤2013 |
| FMR (Fidelity) | 1.65M | 2.68% | $178.2M | trimmed -0.9% | 2014 Q1 |
| Wasatch Advisors LP | 1.51M | 2.45% | $163.0M | trimmed -11.2% | 2025 Q3 |
| Neuberger Berman Group LLC | 1.39M | 2.27% | $150.8M | trimmed -2.7% | 2020 Q4 |
| Dimensional Fund Advisors | 1.21M | 1.96% | $130.8M | unchanged | ≤2013 |
| Nomura Asset Management International INC. | 1.18M | 1.91% | $127.2M | trimmed -9.8% | 2025 Q4 |
| First Trust Advisors LP | 1.16M | 1.89% | $125.7M | added +12% | ≤2013 |
| Gw&k Investment Management, LLC | 958.1k | 1.56% | $103.7M | added +69.7% | 2017 Q4 |
| Charles Schwab Investment Management | 891.2k | 1.45% | $96.5M | added +0.8% | ≤2013 |
| Allianz Asset Management GmbH | 873.7k | 1.42% | $94.6M | added +1.9% | 2024 Q3 |
| Conestoga Capital Advisors, LLC | 860.9k | 1.40% | $93.2M | trimmed -13.9% | 2023 Q2 |
| T. Rowe Price | 851.9k | 1.39% | $92.2M | trimmed -9.9% | ≤2013 |
| Goldman Sachs | 840.5k | 1.37% | $91.0M | added +4% | ≤2013 |
| Morgan Stanley | 774.9k | 1.26% | $83.9M | trimmed -10% | ≤2013 |
| Van Berkom & Associates INC. | 724.3k | 1.18% | $78.4M | trimmed -2.3% | 2020 Q2 |
| Invesco | 700.4k | 1.14% | $75.8M | trimmed -67.7% | ≤2013 |
| Bank OF America CORP /DE/ | 682.8k | 1.11% | $73.9M | added +11.2% | ≤2013 |
| Northern Trust | 643.7k | 1.05% | $69.7M | added +1.7% | ≤2013 |
| Congress Asset Management CO | 642.4k | 1.04% | $69.5M | added +16.5% | 2025 Q2 |
| Franklin Resources | 639.6k | 1.04% | $69.2M | trimmed -3.1% | 2023 Q2 |
| ArrowMark Colorado Holdings LLC | 623.7k | 1.01% | $67.5M | added +9.3% | 2024 Q3 |
| Nuveen | 593.2k | 0.96% | $64.2M | trimmed -0.7% | 2019 Q2 |
| Vaughan Nelson Investment Management, L.p. | 534.0k | 0.87% | $57.8M | opened | 2026 Q1 |
| BNY Mellon | 405.3k | 0.66% | $43.9M | trimmed -3.5% | ≤2013 |
| Manufacturers Life Insurance Company, THE | 399.4k | 0.65% | $43.2M | added +20.2% | ≤2013 |
| T. Rowe Price Investment Management, INC. | 376.0k | 0.61% | $40.7M | added +1143.2% | 2022 Q3 |
| Silvercrest Asset Management Group LLC | 357.0k | 0.58% | $38.6M | trimmed -12.4% | 2022 Q2 |
| Principal Financial Group INC | 345.0k | 0.56% | $37.3M | trimmed -0.6% | ≤2013 |
| Driehaus Capital Management LLC | 339.4k | 0.55% | $36.7M | trimmed -0.6% | 2022 Q3 |
| Gamco Investors, INC. et al | 335.4k | 0.55% | $36.3M | trimmed -1.2% | ≤2013 |
| Global Alpha Capital Management LTD. | 330.1k | 0.54% | $35.7M | trimmed -24.3% | 2020 Q1 |
| UBS | 329.8k | 0.54% | $35.7M | trimmed -30.6% | ≤2013 |
| Janus Henderson | 318.0k | 0.52% | $34.4M | added +29.7% | 2021 Q3 |
| Raymond James Financial INC | 302.8k | 0.49% | $32.8M | trimmed -5.3% | 2018 Q3 |
| Neumeier Poma Investment Counsel LLC (focused) | 294.9k | 0.48% | $31.9M | added +32.3% | 2018 Q1 |
| Pembroke Management, LTD | 287.9k | 0.47% | $31.2M | trimmed -22.7% | 2023 Q4 |
| Bessemer Group INC | 285.9k | 0.47% | $30.9M | trimmed -3.3% | 2023 Q2 |
| Two Sigma | 274.1k | 0.45% | $29.7M | added +67.6% | 2021 Q4 |
| Fort Washington Investment Advisors INC /OH/ | 270.5k | 0.44% | $29.3M | added +9.3% | 2022 Q2 |
| Oberweis Asset Management INC/ | 267.6k | 0.43% | $29.0M | added +60.7% | 2022 Q3 |
| Capital International Investors | 262.9k | 0.43% | $28.5M | added +40.6% | 2024 Q2 |
| Eulav Asset Management | 261.8k | 0.43% | $28.3M | unchanged | 2023 Q1 |
| Greenvale Capital LLP (focused) | 254.6k | 0.41% | $27.6M | opened | 2026 Q1 |
| Envestnet Asset Management INC | 244.1k | 0.40% | $26.4M | added +40.3% | 2019 Q2 |
| Robeco Institutional Asset Management B.v. | 241.4k | 0.39% | $26.1M | added +24.3% | 2020 Q4 |
| Millennium Management | 238.2k | 0.39% | $25.8M | added +196.7% | ≤2013 |
Largest 50 of 435 shown; the full ranked, searchable register is at boothcheck.com/holders/FSS. 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.