Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
981 institutional managers reported holding ATO for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 54%. 132 opened new positions; 102 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 21.80M | 12.99% | $4.02B | added +3.5% | ≤2013 |
| BlackRock | 17.45M | 10.40% | $3.22B | added +2.5% | ≤2013 |
| State Street | 11.37M | 6.78% | $2.10B | added +5.4% | ≤2013 |
| Wellington Management | 9.65M | 5.75% | $1.78B | trimmed -3.6% | 2022 Q3 |
| Capital International Investors | 7.33M | 4.37% | $1.35B | trimmed -38.4% | 2024 Q3 |
| Pacer Advisors, INC. | 6.29M | 3.75% | $1.16B | added +8.9% | 2015 Q4 |
| Aristotle Capital Management, LLC | 4.87M | 2.90% | $898.2M | trimmed -23.6% | 2022 Q1 |
| Geode Capital | 4.34M | 2.58% | $800.4M | added +2.9% | ≤2013 |
| Bank OF America CORP /DE/ | 4.20M | 2.50% | $775.0M | added +11% | ≤2013 |
| Capital Research Global Investors | 4.01M | 2.39% | $740.2M | opened | 2026 Q1 |
| Invesco | 3.01M | 1.79% | $555.0M | unchanged | ≤2013 |
| Morgan Stanley | 3.00M | 1.79% | $553.9M | added +8.9% | ≤2013 |
| T. Rowe Price | 2.72M | 1.62% | $501.1M | trimmed -58.8% | ≤2013 |
| Deutsche Bank AG\ | 2.55M | 1.52% | $470.1M | trimmed -11.8% | ≤2013 |
| Goldman Sachs | 1.94M | 1.15% | $357.2M | added +55.3% | ≤2013 |
| UBS | 1.78M | 1.06% | $329.0M | added +10.2% | ≤2013 |
| MFS Investment Management | 1.77M | 1.06% | $327.2M | trimmed -10.3% | ≤2013 |
| Legal & General Group PLC | 1.62M | 0.96% | $298.3M | added +2.3% | ≤2013 |
| Northern Trust | 1.55M | 0.92% | $286.0M | added +2.5% | ≤2013 |
| DZ Bank AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main | 1.49M | 0.89% | $275.1M | added +17.6% | 2021 Q4 |
| Wells Fargo & COMPANY/MN | 1.33M | 0.79% | $245.3M | trimmed -1.5% | ≤2013 |
| Amundi | 1.30M | 0.78% | $240.5M | added +49.6% | 2017 Q4 |
| Perpetual LTD | 1.24M | 0.74% | $228.9M | trimmed -11.3% | 2023 Q1 |
| Raymond James Financial INC | 1.21M | 0.72% | $222.7M | added +8.6% | 2015 Q1 |
| Pictet Asset Management Holding SA | 1.18M | 0.70% | $216.9M | added +10.9% | ≤2013 |
| Sfmg, LLC | 1.06M | 0.63% | $195.4M | unchanged | ≤2013 |
| Charles Schwab Investment Management | 1.04M | 0.62% | $191.3M | added +5.7% | ≤2013 |
| ProShare Advisors LLC | 1.02M | 0.61% | $189.0M | added +7.9% | ≤2013 |
| American Century Companies INC | 1.00M | 0.60% | $185.0M | trimmed -3.6% | 2014 Q1 |
| BNP Paribas Financial Markets | 967.3k | 0.58% | $178.5M | added +113.7% | 2014 Q1 |
| Nuveen | 947.5k | 0.56% | $174.9M | added +95.8% | 2018 Q4 |
| BNY Mellon | 892.7k | 0.53% | $164.8M | unchanged | ≤2013 |
| GQG Partners | 887.2k | 0.53% | $163.7M | added +26.1% | 2025 Q2 |
| PNC Financial Services Group, INC. | 886.3k | 0.53% | $163.6M | added +1.3% | ≤2013 |
| AQR Capital | 822.8k | 0.49% | $151.9M | added +62.4% | ≤2013 |
| Cohen & Steers | 800.2k | 0.48% | $147.7M | added +19.2% | 2025 Q3 |
| Hsbc Holdings PLC | 780.2k | 0.47% | $144.0M | trimmed -4.5% | ≤2013 |
| Cbre Investment Management Listed Real Assets LLC | 758.0k | 0.45% | $139.9M | added +43.2% | 2023 Q2 |
| Dimensional Fund Advisors | 753.0k | 0.45% | $139.0M | added +2.7% | ≤2013 |
| Citadel Advisors | 751.6k | 0.45% | $138.7M | added +41.3% | 2016 Q4 |
| Silvercrest Asset Management Group LLC | 707.2k | 0.42% | $130.5M | trimmed -2.5% | ≤2013 |
| Envestnet Asset Management INC | 674.6k | 0.40% | $124.5M | added +22.2% | 2015 Q3 |
| PFA Pension, Forsikringsaktieselskab | 668.0k | 0.40% | $123.3M | added +4.5% | 2025 Q4 |
| Duff & Phelps Investment Management CO | 607.9k | 0.36% | $112.2M | trimmed -6.8% | 2015 Q2 |
| Neuberger Berman Group LLC | 601.1k | 0.36% | $110.9M | added +0.7% | 2013 Q4 |
| Chevy Chase Trust Holdings, LLC | 518.7k | 0.31% | $95.7M | added +2.7% | 2013 Q3 |
| Principal Financial Group INC | 516.1k | 0.31% | $95.3M | added +4.8% | ≤2013 |
| SEI Investments CO | 512.8k | 0.31% | $94.6M | trimmed -10.7% | 2014 Q1 |
| Royal Bank OF Canada | 503.9k | 0.30% | $93.0M | trimmed -15.8% | ≤2013 |
| Nilsine Partners, LLC | 491.3k | 0.29% | $90.7M | trimmed -2% | 2024 Q4 |
Largest 50 of 981 shown; the full ranked, searchable register is at boothcheck.com/holders/ATO. 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.