Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
478 institutional managers reported holding SON for the quarter ended Mar 31, 2026. Together they hold about 86% of shares outstanding; the top 10 hold 48%. 71 opened new positions; 45 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 11.39M | 11.43% | $615.9M | added +3.5% | ≤2013 |
| Vanguard Group | 10.08M | 10.11% | $544.9M | added +1.5% | ≤2013 |
| Fuller & Thaler Asset Management, INC. | 5.91M | 5.93% | $319.8M | unchanged | 2022 Q1 |
| State Street | 4.22M | 4.23% | $228.2M | trimmed -1.9% | ≤2013 |
| Dimensional Fund Advisors | 3.93M | 3.94% | $212.6M | added +0.8% | ≤2013 |
| Bank OF America CORP /DE/ | 3.31M | 3.32% | $179.1M | added +19% | ≤2013 |
| Earnest Partners LLC | 2.59M | 2.59% | $139.8M | added +0.8% | 2013 Q4 |
| LSV Asset Management | 2.09M | 2.09% | $112.8M | added +33.5% | 2022 Q4 |
| Nordea Investment Management AB | 2.06M | 2.07% | $111.5M | unchanged | 2023 Q1 |
| Geode Capital | 1.96M | 1.97% | $105.9M | added +7.1% | ≤2013 |
| AQR Capital | 1.61M | 1.61% | $86.9M | trimmed -16% | ≤2013 |
| SEI Investments CO | 1.50M | 1.50% | $80.9M | added +4.6% | ≤2013 |
| Invesco | 1.26M | 1.26% | $68.0M | trimmed -16.1% | ≤2013 |
| First Trust Advisors LP | 1.16M | 1.16% | $62.5M | trimmed -10.9% | ≤2013 |
| BNY Mellon | 1.12M | 1.12% | $60.4M | added +1.1% | ≤2013 |
| Charles Schwab Investment Management | 1.11M | 1.11% | $59.9M | added +2.4% | ≤2013 |
| Brown Advisory INC | 995.7k | 1.00% | $53.8M | trimmed -2.2% | ≤2013 |
| FMR (Fidelity) | 950.3k | 0.95% | $51.4M | added +23.3% | ≤2013 |
| Private Management Group INC | 855.7k | 0.86% | $46.3M | trimmed -0.8% | 2024 Q3 |
| Northern Trust | 827.4k | 0.83% | $44.7M | added +5.1% | ≤2013 |
| Morgan Stanley | 810.7k | 0.81% | $43.8M | unchanged | ≤2013 |
| Royal Bank OF Canada | 809.7k | 0.81% | $43.8M | trimmed -17.7% | ≤2013 |
| UBS | 761.5k | 0.76% | $41.2M | added +26.3% | ≤2013 |
| Arrowstreet Capital | 732.1k | 0.73% | $39.6M | added +236.1% | 2024 Q2 |
| Cooper Creek Partners Management LLC | 695.8k | 0.70% | $37.6M | trimmed -39% | 2024 Q4 |
| Gotham Asset Management | 686.3k | 0.69% | $37.1M | added +469.4% | 2025 Q3 |
| Frontier Capital Management CO LLC | 671.6k | 0.67% | $36.3M | added +4.3% | 2025 Q3 |
| Goldman Sachs | 643.0k | 0.65% | $34.8M | added +277.3% | ≤2013 |
| Pictet Asset Management Holding SA | 601.9k | 0.60% | $32.5M | trimmed -8.7% | 2017 Q1 |
| ProShare Advisors LLC | 534.5k | 0.54% | $28.9M | trimmed -32.6% | ≤2013 |
| Millennium Management | 468.8k | 0.47% | $25.3M | added +1198.2% | 2017 Q2 |
| Invenomic Capital Management LP | 439.7k | 0.44% | $23.8M | trimmed -49.5% | 2023 Q1 |
| Charter Oak Advisors LP (focused) | 437.3k | 0.44% | $23.6M | added +14.9% | 2025 Q4 |
| Nomura Asset Management International INC. | 426.2k | 0.43% | $23.0M | trimmed -22.2% | 2025 Q4 |
| Silvercrest Asset Management Group LLC | 411.6k | 0.41% | $22.3M | added +31.8% | 2015 Q4 |
| Brandes Investment Partners, LP | 403.6k | 0.41% | $21.8M | added +9.5% | 2023 Q4 |
| Natixis Advisors, LLC | 389.9k | 0.39% | $21.1M | added +19.4% | ≤2013 |
| Storebrand Asset Management AS | 386.6k | 0.39% | $20.9M | trimmed -16.2% | 2025 Q4 |
| Wells Fargo & COMPANY/MN | 380.7k | 0.38% | $20.6M | added +168.9% | ≤2013 |
| Quantinno Capital Management LP | 364.6k | 0.37% | $19.7M | added +13.7% | 2022 Q2 |
| Raymond James Financial INC | 358.7k | 0.36% | $19.4M | added +17% | ≤2013 |
| Jones Financial Companies Lllp | 354.2k | 0.35% | $19.2M | added +1758.8% | 2024 Q3 |
| Arga Investment Management, LP | 347.9k | 0.35% | $18.8M | added +608.5% | 2025 Q3 |
| Wellington Management | 340.0k | 0.34% | $18.4M | trimmed -4.1% | 2022 Q4 |
| Balyasny Asset Management | 334.9k | 0.34% | $18.1M | trimmed -7.1% | 2022 Q2 |
| SG Americas Securities, LLC | 329.0k | 0.33% | $17.8M | trimmed -54.8% | ≤2013 |
| American Century Companies INC | 323.3k | 0.32% | $17.5M | added +289.9% | ≤2013 |
| NEW York State Common Retirement Fund | 314.5k | 0.32% | $17.0M | added +26.1% | ≤2013 |
| Sound Income Strategies, LLC | 311.8k | 0.31% | $16.9M | trimmed -5.6% | 2023 Q4 |
| Speece Thorson Capital Group INC (focused) | 306.6k | 0.31% | $16.6M | trimmed -7.5% | ≤2013 |
Largest 50 of 478 shown; the full ranked, searchable register is at boothcheck.com/holders/SON. 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.