Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
554 institutional managers reported holding ONTO for the quarter ended Mar 31, 2026. Together they hold about 94% of shares outstanding; the top 10 hold 39%. 125 opened new positions; 51 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 5.53M | 11.07% | $1.13B | added +12.2% | 2019 Q4 |
| Vanguard Group | 5.36M | 10.72% | $1.10B | trimmed -4% | 2019 Q4 |
| State Street | 1.50M | 3.00% | $307.2M | added +2.8% | 2019 Q4 |
| Geode Capital | 1.21M | 2.42% | $248.0M | added +7.4% | 2019 Q4 |
| Point72 | 1.20M | 2.41% | $246.5M | added +212.8% | 2024 Q2 |
| Paradigm Capital Management INC/NY | 1.10M | 2.21% | $225.8M | trimmed -2.1% | 2019 Q4 |
| William Blair Investment Management, LLC | 964.2k | 1.93% | $197.5M | trimmed -44.2% | 2025 Q1 |
| Voya Investment Management LLC | 917.2k | 1.83% | $187.9M | trimmed -5.6% | 2019 Q4 |
| FMR (Fidelity) | 829.0k | 1.66% | $169.8M | added +83.7% | 2019 Q4 |
| Thrivent Financial for Lutherans | 739.3k | 1.48% | $151.4M | trimmed -23.1% | 2019 Q4 |
| D. E. Shaw | 722.6k | 1.45% | $148.0M | added +39.7% | 2022 Q2 |
| Geneva Capital Management LLC | 705.9k | 1.41% | $144.6M | trimmed -15.1% | 2021 Q1 |
| Dimensional Fund Advisors | 677.5k | 1.35% | $138.8M | added +4.3% | 2019 Q4 |
| Fisher Investments | 650.0k | 1.30% | $133.1M | trimmed -7.4% | 2019 Q4 |
| Invesco | 632.8k | 1.27% | $129.6M | added +398.5% | 2019 Q4 |
| T. Rowe Price | 605.8k | 1.21% | $124.1M | trimmed -10.9% | 2019 Q4 |
| Jane Street | 604.7k | 1.21% | $123.9M | added +29909.3% | 2021 Q3 |
| AQR Capital | 590.8k | 1.18% | $121.0M | trimmed -4% | 2019 Q4 |
| UBS | 587.4k | 1.18% | $120.3M | added +45.9% | 2019 Q4 |
| Franklin Resources | 579.2k | 1.16% | $118.6M | trimmed -57.2% | 2019 Q4 |
| BNY Mellon | 567.8k | 1.14% | $116.3M | trimmed -5.5% | 2019 Q4 |
| Jennison Associates LLC | 564.3k | 1.13% | $115.6M | trimmed -17.1% | 2023 Q3 |
| Wellington Management | 543.9k | 1.09% | $111.4M | trimmed -55.4% | 2022 Q4 |
| Charles Schwab Investment Management | 529.6k | 1.06% | $108.5M | added +5% | 2019 Q4 |
| Marshall Wace | 483.1k | 0.97% | $98.9M | added +12.4% | 2023 Q4 |
| Goldman Sachs | 482.3k | 0.96% | $98.8M | added +5.9% | 2019 Q4 |
| Northern Trust | 456.0k | 0.91% | $93.4M | added +2.4% | 2019 Q4 |
| Morgan Stanley | 436.0k | 0.87% | $89.3M | trimmed -6.7% | 2019 Q4 |
| T. Rowe Price Investment Management, INC. | 414.8k | 0.83% | $85.0M | added +1202% | 2022 Q3 |
| Channing Capital Management, LLC | 360.1k | 0.72% | $73.8M | trimmed -30.6% | 2025 Q3 |
| Allspring Global Investments Holdings, LLC | 360.0k | 0.72% | $73.7M | added +32.5% | 2021 Q4 |
| Bridgewater Associates | 348.4k | 0.70% | $71.4M | added +274.1% | 2024 Q2 |
| Westfield Capital Management CO LP | 327.0k | 0.65% | $67.0M | trimmed -32.3% | 2024 Q4 |
| Driehaus Capital Management LLC | 320.5k | 0.64% | $65.7M | trimmed -8.2% | 2025 Q3 |
| Royce & Associates | 317.1k | 0.63% | $65.0M | trimmed -13.3% | 2019 Q4 |
| Two Sigma | 312.7k | 0.63% | $64.0M | added +261.6% | 2024 Q2 |
| BNP Paribas Financial Markets | 311.3k | 0.62% | $63.8M | added +38.2% | 2024 Q4 |
| Ameriprise Financial INC | 309.4k | 0.62% | $63.4M | added +176.1% | 2019 Q4 |
| Glenview Capital (focused) | 299.7k | 0.60% | $61.4M | trimmed -27.7% | 2025 Q3 |
| Citadel Advisors | 296.6k | 0.59% | $60.7M | added +113.7% | 2022 Q1 |
| TimesSquare Capital Management, LLC | 267.9k | 0.54% | $54.9M | added +14.9% | 2020 Q1 |
| Penserra Capital Management LLC | 254.6k | 0.51% | $52.1M | added +7.3% | 2019 Q4 |
| Raymond James Financial INC | 252.9k | 0.51% | $51.8M | trimmed -10.5% | 2020 Q1 |
| Defiance ETFs, LLC | 249.9k | 0.50% | $51.2M | added +5.3% | 2025 Q4 |
| NEW York State Common Retirement Fund | 239.4k | 0.48% | $49.0M | added +9.1% | 2019 Q4 |
| SG Capital Management LLC | 229.5k | 0.46% | $47.0M | added +97.6% | 2025 Q3 |
| Assenagon Asset Management S.a. | 228.3k | 0.46% | $46.8M | added +11.3% | 2024 Q3 |
| Royal Bank OF Canada | 214.6k | 0.43% | $44.0M | trimmed -13.9% | 2019 Q4 |
| Junto Capital Management LP | 213.2k | 0.43% | $43.7M | trimmed -41.8% | 2025 Q3 |
| Balyasny Asset Management | 205.7k | 0.41% | $42.1M | trimmed -5.9% | 2025 Q4 |
Largest 50 of 554 shown; the full ranked, searchable register is at boothcheck.com/holders/ONTO. 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.