Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
382 institutional managers reported holding ZETA for the quarter ended Mar 31, 2026. Together they hold about 76% of shares outstanding; the top 10 hold 39%. 66 opened new positions; 66 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 23.61M | 9.90% | $375.9M | added +2.3% | 2021 Q2 |
| BlackRock | 17.98M | 7.54% | $286.3M | added +7.2% | 2021 Q2 |
| Greenvale Capital LLP (focused) | 10.40M | 4.36% | $165.6M | added +48.1% | 2025 Q1 |
| Capital Group (American Funds) | 8.06M | 3.38% | $128.3M | added +60.7% | 2023 Q4 |
| Disciplined Growth Investors INC /MN | 6.15M | 2.58% | $98.0M | added +11.9% | 2025 Q3 |
| Neuberger Berman Group LLC | 5.87M | 2.46% | $93.5M | added +1.9% | 2021 Q4 |
| Goldman Sachs | 5.49M | 2.30% | $87.3M | trimmed -1.7% | 2022 Q1 |
| Geode Capital | 5.14M | 2.15% | $81.8M | added +13.4% | 2021 Q3 |
| UBS | 5.09M | 2.13% | $81.1M | added +57.1% | 2021 Q2 |
| Contour Asset Management LLC (focused) | 5.06M | 2.12% | $80.6M | trimmed -54.6% | 2025 Q2 |
| Jane Street | 4.98M | 2.09% | $79.2M | added +201.3% | 2022 Q1 |
| State Street | 4.88M | 2.05% | $77.8M | added +9.2% | 2021 Q3 |
| Bwcp, LP (focused) | 4.51M | 1.89% | $71.8M | added +41.6% | 2023 Q3 |
| Bank OF America CORP /DE/ | 3.85M | 1.61% | $61.4M | added +47.7% | 2021 Q2 |
| Dimensional Fund Advisors | 2.86M | 1.20% | $45.6M | added +75.7% | 2024 Q3 |
| BNP Paribas Financial Markets | 2.48M | 1.04% | $39.5M | trimmed -14.2% | 2024 Q4 |
| Barrow Hanley Mewhinney & Strauss LLC | 2.44M | 1.02% | $38.8M | added +19.2% | 2025 Q3 |
| Marshall Wace | 2.30M | 0.96% | $36.6M | added +27.2% | 2024 Q3 |
| Northern Trust | 2.22M | 0.93% | $35.4M | added +6.8% | 2021 Q3 |
| Morgan Stanley | 2.21M | 0.93% | $35.2M | added +50.9% | 2021 Q2 |
| Clearbridge Investments, LLC | 2.09M | 0.88% | $33.3M | trimmed -7.1% | 2021 Q2 |
| Stephens Investment Management Group LLC | 2.03M | 0.85% | $32.3M | trimmed -0.5% | 2024 Q3 |
| Nuveen | 1.91M | 0.80% | $30.5M | added +3% | 2022 Q2 |
| Charles Schwab Investment Management | 1.69M | 0.71% | $26.8M | added +3.6% | 2022 Q2 |
| Citadel Advisors | 1.67M | 0.70% | $26.6M | trimmed -17.2% | 2021 Q2 |
| William Blair Investment Management, LLC | 1.59M | 0.67% | $25.4M | added +5.1% | 2024 Q2 |
| Panagora Asset Management INC | 1.27M | 0.53% | $20.3M | added +130.8% | 2024 Q2 |
| Fort Washington Investment Advisors INC /OH/ | 1.14M | 0.48% | $18.2M | added +66.4% | 2025 Q4 |
| Ameriprise Financial INC | 1.11M | 0.47% | $17.7M | added +0.9% | 2022 Q3 |
| AQR Capital | 1.10M | 0.46% | $17.5M | added +422.5% | 2022 Q3 |
| Granahan Investment Management, LLC | 1.02M | 0.43% | $16.3M | trimmed -60.9% | 2021 Q2 |
| Lazard Asset Management LLC | 961.6k | 0.40% | $15.3M | trimmed -18.5% | 2023 Q3 |
| Wellington Management | 941.7k | 0.40% | $15.0M | added +1.2% | 2024 Q4 |
| P2 Capital Partners, LLC (focused) | 915.0k | 0.38% | $14.6M | trimmed -46.2% | 2025 Q1 |
| Millennium Management | 872.2k | 0.37% | $13.9M | added +302.3% | 2021 Q2 |
| Oberweis Asset Management INC/ | 871.1k | 0.36% | $13.9M | added +13.6% | 2023 Q1 |
| Principal Financial Group INC | 868.2k | 0.36% | $13.8M | added +7696.7% | 2022 Q3 |
| Penn Capital Management Company, LLC | 833.8k | 0.35% | $13.3M | added +1.2% | 2025 Q3 |
| BNY Mellon | 830.9k | 0.35% | $13.2M | added +2.3% | 2022 Q1 |
| RPG Investment Advisory, LLC | 759.8k | 0.32% | $12.1M | added +2.5% | 2025 Q3 |
| Granite Investment Partners, LLC | 700.2k | 0.29% | $11.1M | trimmed -5.8% | 2024 Q4 |
| NEW York State Common Retirement Fund | 698.7k | 0.29% | $11.1M | trimmed -3.2% | 2021 Q2 |
| Susquehanna International Group | 667.5k | 0.28% | $10.6M | added +143.1% | 2021 Q2 |
| Tudor Investment | 656.4k | 0.28% | $10.4M | trimmed -44.6% | 2024 Q4 |
| Qube Research & Technologies LTD | 653.4k | 0.27% | $10.4M | added +1730.3% | 2023 Q2 |
| HRT Financial LP | 585.4k | 0.24% | $9.3M | opened | 2024 Q4 |
| Summit Creek Advisors LLC | 559.1k | 0.23% | $8.9M | trimmed -13.8% | 2023 Q1 |
| Royal Bank OF Canada | 558.2k | 0.23% | $8.9M | added +69.8% | 2022 Q1 |
| Russell Investments Group, LTD. | 554.0k | 0.23% | $8.8M | added +6.9% | 2022 Q2 |
| SEI Investments CO | 553.7k | 0.23% | $8.8M | added +51.7% | 2022 Q4 |
Largest 50 of 382 shown; the full ranked, searchable register is at boothcheck.com/holders/ZETA. 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.