Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
415 institutional managers reported holding AVTR for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 59%. 82 opened new positions; 77 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Dodge & Cox | 119.65M | 17.68% | $938.6M | added +2.2% | 2023 Q3 |
| Vanguard Group | 67.51M | 9.97% | $529.6M | added +3.9% | 2019 Q2 |
| BlackRock | 65.70M | 9.71% | $515.4M | added +10.2% | 2019 Q3 |
| Wellington Management | 24.22M | 3.58% | $190.0M | added +3.4% | 2020 Q4 |
| Greenhaven Associates INC (focused) | 22.59M | 3.34% | $177.2M | added +10.2% | 2025 Q3 |
| Barrow Hanley Mewhinney & Strauss LLC | 22.36M | 3.30% | $175.4M | trimmed -32.8% | 2023 Q1 |
| State Street | 20.72M | 3.06% | $162.6M | added +2.5% | 2019 Q2 |
| Engine Capital Management, LP (focused) | 19.78M | 2.92% | $155.2M | added +65.8% | 2025 Q2 |
| Dimensional Fund Advisors | 16.89M | 2.50% | $132.5M | added +15.7% | 2019 Q3 |
| Pacer Advisors, INC. | 16.25M | 2.40% | $127.5M | added +2445.2% | 2022 Q4 |
| T. Rowe Price Investment Management, INC. | 14.79M | 2.19% | $116.0M | trimmed -30.4% | 2022 Q3 |
| New Mountain Capital, L.l.c. (focused) | 14.00M | 2.07% | $109.8M | unchanged | 2019 Q2 |
| D. E. Shaw | 13.11M | 1.94% | $102.9M | added +110.9% | 2019 Q3 |
| Geode Capital | 12.89M | 1.91% | $101.1M | added +7.6% | 2019 Q2 |
| London CO OF Virginia | 10.85M | 1.60% | $85.1M | trimmed -9.1% | 2025 Q3 |
| Fuller & Thaler Asset Management, INC. | 10.63M | 1.57% | $83.4M | added +555.3% | 2025 Q4 |
| Clarkston Capital Partners, LLC | 8.63M | 1.27% | $67.7M | trimmed -42.9% | 2023 Q1 |
| First Manhattan CO. LLC. | 8.09M | 1.20% | $63.5M | added +103.8% | 2025 Q2 |
| Invesco | 8.07M | 1.19% | $63.3M | trimmed -53% | 2019 Q2 |
| FMR (Fidelity) | 7.61M | 1.12% | $59.7M | trimmed -0.8% | 2019 Q2 |
| Bank OF America CORP /DE/ | 7.07M | 1.04% | $55.4M | added +24.3% | 2019 Q2 |
| Morgan Stanley | 6.10M | 0.90% | $47.8M | trimmed -65.1% | 2019 Q2 |
| Earnest Partners LLC | 6.02M | 0.89% | $47.3M | unchanged | 2025 Q2 |
| UBS | 5.81M | 0.86% | $45.6M | trimmed -40.9% | 2019 Q2 |
| Northern Trust | 5.46M | 0.81% | $42.8M | added +2.8% | 2019 Q2 |
| Charles Schwab Investment Management | 5.41M | 0.80% | $42.4M | added +10.9% | 2019 Q2 |
| SEI Investments CO | 5.29M | 0.78% | $41.5M | added +0.9% | 2019 Q2 |
| Jane Street | 4.97M | 0.73% | $39.0M | added +29.6% | 2025 Q3 |
| Gendell Jeffrey L | 4.92M | 0.73% | $38.6M | added +802.3% | 2025 Q4 |
| AQR Capital | 4.87M | 0.72% | $38.2M | added +10.8% | 2020 Q3 |
| Yacktman Asset Management | 4.75M | 0.70% | $37.2M | opened | 2026 Q1 |
| Voss Capital, LP (focused) | 4.45M | 0.66% | $34.9M | added +8.4% | 2025 Q2 |
| BNY Mellon | 4.42M | 0.65% | $34.7M | unchanged | 2019 Q2 |
| Brickwood Asset Management LLP (focused) | 4.34M | 0.64% | $34.0M | added +36.2% | 2025 Q3 |
| Robeco Institutional Asset Management B.v. | 4.31M | 0.64% | $33.8M | trimmed -42.2% | 2020 Q2 |
| Ameriprise Financial INC | 4.12M | 0.61% | $32.3M | added +13.5% | 2019 Q2 |
| Voya Investment Management LLC | 3.74M | 0.55% | $29.3M | trimmed -24.7% | 2019 Q3 |
| Goldman Sachs | 3.71M | 0.55% | $29.1M | added +297.7% | 2019 Q2 |
| Southeastern Asset Management INC/TN/ (focused) | 3.52M | 0.52% | $27.6M | trimmed -0.8% | 2025 Q3 |
| Marshall Wace | 3.44M | 0.51% | $27.0M | opened | 2026 Q1 |
| Eversept Partners, LP | 2.97M | 0.44% | $23.3M | trimmed -6.4% | 2020 Q4 |
| Freestone Grove Partners LP | 2.79M | 0.41% | $21.9M | added +8% | 2024 Q4 |
| Private Management Group INC | 2.73M | 0.40% | $21.4M | added +11.2% | 2025 Q2 |
| Prescott General Partners LLC (focused) | 2.60M | 0.38% | $20.4M | opened | 2026 Q1 |
| Natixis Advisors, LLC | 2.54M | 0.38% | $19.9M | added +16.7% | 2019 Q4 |
| Millennium Management | 2.44M | 0.36% | $19.1M | trimmed -33.6% | 2019 Q2 |
| Tudor Investment | 2.34M | 0.35% | $18.4M | added +624.9% | 2025 Q4 |
| Jones Financial Companies Lllp | 2.33M | 0.34% | $18.3M | added +210068.3% | 2023 Q3 |
| Frontier Capital Management CO LLC | 2.02M | 0.30% | $15.9M | added +11.7% | 2023 Q1 |
| Loews CORP (focused) | 2.00M | 0.30% | $15.7M | added +100% | 2025 Q2 |
Largest 50 of 415 shown; the full ranked, searchable register is at boothcheck.com/holders/AVTR. 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.