Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
804 institutional managers reported holding ON for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 55%. 132 opened new positions; 106 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| FMR (Fidelity) | 58.16M | 14.76% | $3.60B | trimmed -2% | ≤2013 |
| Vanguard Group | 49.75M | 12.62% | $3.08B | trimmed -2.7% | ≤2013 |
| BlackRock | 39.91M | 10.13% | $2.47B | trimmed -1.2% | ≤2013 |
| State Street | 18.31M | 4.64% | $1.13B | trimmed -2.9% | ≤2013 |
| Janus Henderson | 13.70M | 3.48% | $848.4M | added +10.9% | ≤2013 |
| Geode Capital | 10.76M | 2.73% | $666.5M | trimmed -2.2% | ≤2013 |
| Slate Path Capital LP (focused) | 7.80M | 1.98% | $482.9M | trimmed -25.6% | 2025 Q4 |
| UBS | 6.99M | 1.77% | $432.6M | added +8.2% | ≤2013 |
| Goldman Sachs | 6.64M | 1.68% | $411.0M | added +4.7% | ≤2013 |
| Ameriprise Financial INC | 6.45M | 1.64% | $399.6M | added +5.2% | ≤2013 |
| Morgan Stanley | 6.11M | 1.55% | $378.2M | trimmed -8.9% | ≤2013 |
| Allspring Global Investments Holdings, LLC | 6.10M | 1.55% | $377.7M | trimmed -4.1% | 2021 Q4 |
| Invesco | 6.04M | 1.53% | $373.8M | trimmed -2% | ≤2013 |
| Bank OF America CORP /DE/ | 5.23M | 1.33% | $323.6M | trimmed -22.8% | ≤2013 |
| Amundi | 4.85M | 1.23% | $300.3M | added +44.5% | 2015 Q1 |
| Citigroup INC | 4.66M | 1.18% | $288.6M | added +0.9% | ≤2013 |
| Pictet Asset Management Holding SA | 4.60M | 1.17% | $284.7M | added +15.5% | ≤2013 |
| Two Sigma | 4.45M | 1.13% | $275.8M | added +11.5% | 2024 Q1 |
| VAN ECK Associates CORP | 4.41M | 1.12% | $273.2M | added +7.6% | ≤2013 |
| Baillie Gifford | 4.29M | 1.09% | $265.5M | trimmed -9.3% | 2025 Q1 |
| Barclays PLC | 3.92M | 1.00% | $243.0M | trimmed -15.8% | ≤2013 |
| Northern Trust | 3.45M | 0.88% | $213.7M | trimmed -2.4% | ≤2013 |
| Dimensional Fund Advisors | 3.44M | 0.87% | $213.1M | added +6.4% | ≤2013 |
| Deutsche Bank AG\ | 3.00M | 0.76% | $186.1M | trimmed -10.2% | ≤2013 |
| BNP Paribas Financial Markets | 2.97M | 0.75% | $183.8M | trimmed -23.5% | ≤2013 |
| Rafferty Asset Management, LLC | 2.83M | 0.72% | $175.0M | trimmed -22.2% | 2013 Q4 |
| Legal & General Group PLC | 2.83M | 0.72% | $175.0M | added +2.4% | 2015 Q3 |
| Charles Schwab Investment Management | 2.76M | 0.70% | $171.1M | added +0.9% | ≤2013 |
| M&G PLC | 2.47M | 0.63% | $152.8M | trimmed -3.8% | 2019 Q4 |
| BNY Mellon | 2.42M | 0.61% | $149.8M | trimmed -1.9% | ≤2013 |
| Earnest Partners LLC | 2.36M | 0.60% | $146.3M | trimmed -1.3% | 2014 Q4 |
| Robeco Institutional Asset Management B.v. | 2.20M | 0.56% | $136.3M | added +42.4% | ≤2013 |
| AllianceBernstein | 2.17M | 0.55% | $134.1M | trimmed -11.2% | ≤2013 |
| Sachem Head Capital Management LP (focused) | 1.95M | 0.49% | $120.4M | opened | 2026 Q1 |
| Neuberger Berman Group LLC | 1.87M | 0.47% | $115.9M | trimmed -15.3% | 2015 Q2 |
| SEI Investments CO | 1.86M | 0.47% | $115.5M | unchanged | ≤2013 |
| American Century Companies INC | 1.78M | 0.45% | $110.4M | added +14.6% | 2019 Q4 |
| First Trust Advisors LP | 1.75M | 0.45% | $108.6M | trimmed -3.8% | ≤2013 |
| Victory Capital Management INC | 1.71M | 0.43% | $106.0M | added +439.9% | 2014 Q1 |
| Healthcare OF Ontario Pension Plan Trust Fund | 1.61M | 0.41% | $100.0M | trimmed -35.7% | 2021 Q2 |
| Assenagon Asset Management S.a. | 1.61M | 0.41% | $99.5M | added +4.7% | 2020 Q4 |
| Russell Investments Group, LTD. | 1.44M | 0.37% | $89.4M | trimmed -2.3% | 2016 Q4 |
| Franklin Resources | 1.44M | 0.36% | $89.0M | added +2323.1% | 2021 Q3 |
| Royal Bank OF Canada | 1.43M | 0.36% | $88.6M | added +15.3% | ≤2013 |
| Discovery Capital Management, LLC / CT | 1.41M | 0.36% | $87.3M | opened | 2026 Q1 |
| Candriam S.c.a. | 1.39M | 0.35% | $86.4M | trimmed -8.3% | 2019 Q2 |
| Marshall Wace | 1.37M | 0.35% | $85.1M | trimmed -19.9% | 2022 Q4 |
| Junto Capital Management LP | 1.22M | 0.31% | $75.5M | opened | 2026 Q1 |
| Mitsubishi UFJ Asset Management CO., LTD. | 1.19M | 0.30% | $73.6M | added +3.5% | 2018 Q2 |
| Swiss National Bank | 1.18M | 0.30% | $73.1M | added +5.4% | ≤2013 |
Largest 50 of 804 shown; the full ranked, searchable register is at boothcheck.com/holders/ON. 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.