Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
273 institutional managers reported holding NTCT for the quarter ended Mar 31, 2026. Together they hold about 90% of shares outstanding; the top 10 hold 56%. 43 opened new positions; 29 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 11.39M | 15.43% | $362.2M | unchanged | ≤2013 |
| Vanguard Group | 9.18M | 12.44% | $292.0M | added +1.4% | ≤2013 |
| Dimensional Fund Advisors | 4.26M | 5.77% | $135.4M | added +2.7% | ≤2013 |
| Legal & General Group PLC | 3.64M | 4.92% | $115.6M | trimmed -5.8% | 2014 Q3 |
| State Street | 3.28M | 4.44% | $104.2M | added +6.9% | ≤2013 |
| LSV Asset Management | 2.75M | 3.72% | $87.3M | added +20% | 2023 Q1 |
| Robeco Institutional Asset Management B.v. | 2.01M | 2.73% | $64.0M | added +29% | 2022 Q3 |
| Geode Capital | 1.83M | 2.48% | $58.3M | added +1.5% | ≤2013 |
| First Trust Advisors LP | 1.74M | 2.36% | $55.5M | trimmed -30.8% | ≤2013 |
| AQR Capital | 1.20M | 1.63% | $38.2M | added +5.3% | 2019 Q4 |
| Allianz Asset Management GmbH | 1.19M | 1.60% | $37.7M | added +5.8% | 2021 Q3 |
| Wellington Management | 1.08M | 1.46% | $34.3M | added +80% | 2025 Q3 |
| Charles Schwab Investment Management | 1.06M | 1.43% | $33.7M | trimmed -1.9% | ≤2013 |
| Northern Trust | 737.8k | 1.00% | $23.5M | added +3.7% | ≤2013 |
| Morgan Stanley | 714.4k | 0.97% | $22.7M | trimmed -21.8% | ≤2013 |
| SG Americas Securities, LLC | 636.6k | 0.86% | $20.2M | added +41.6% | 2022 Q2 |
| Bridgeway Capital Management, LLC | 634.0k | 0.86% | $20.2M | trimmed -1.3% | 2020 Q1 |
| Lazard Asset Management LLC | 585.0k | 0.79% | $18.6M | added +8.7% | 2024 Q4 |
| Barclays PLC | 561.2k | 0.76% | $17.8M | trimmed -26% | ≤2013 |
| Nuveen | 561.2k | 0.76% | $17.8M | added +18.9% | 2019 Q2 |
| Ameriprise Financial INC | 548.8k | 0.74% | $17.5M | trimmed -1.5% | ≤2013 |
| Impax Asset Management Group plc | 522.0k | 0.71% | $16.6M | unchanged | 2024 Q2 |
| CSM Advisors, LLC | 460.3k | 0.62% | $14.6M | added +89.6% | 2025 Q4 |
| Invesco | 452.9k | 0.61% | $14.4M | added +4.8% | ≤2013 |
| BNY Mellon | 449.3k | 0.61% | $14.3M | trimmed -2.3% | ≤2013 |
| UBS | 447.7k | 0.61% | $14.2M | added +122.7% | ≤2013 |
| SEB Asset Management AB | 444.7k | 0.60% | $14.1M | opened | 2026 Q1 |
| Two Sigma | 436.6k | 0.59% | $13.9M | added +112.6% | 2022 Q3 |
| Victory Capital Management INC | 436.3k | 0.59% | $13.9M | added +2.2% | 2019 Q3 |
| Jupiter Asset Management LTD | 421.4k | 0.57% | $13.4M | added +5.3% | 2025 Q2 |
| Deutsche Bank AG\ | 406.3k | 0.55% | $12.9M | unchanged | 2013 Q3 |
| Principal Financial Group INC | 401.7k | 0.54% | $12.8M | added +22.9% | ≤2013 |
| Goldman Sachs | 400.2k | 0.54% | $12.7M | trimmed -14% | ≤2013 |
| Empowered Funds, LLC | 390.5k | 0.53% | $12.4M | added +22.2% | 2025 Q3 |
| FMR (Fidelity) | 323.4k | 0.44% | $10.3M | trimmed -4.3% | 2016 Q1 |
| Connor, Clark & Lunn Investment Management LTD. | 322.8k | 0.44% | $10.3M | trimmed -39.3% | 2024 Q2 |
| Public Sector Pension Investment Board | 301.4k | 0.41% | $9.6M | unchanged | 2020 Q3 |
| Qube Research & Technologies LTD | 296.0k | 0.40% | $9.4M | trimmed -17.2% | 2021 Q1 |
| Defiance ETFs, LLC | 293.2k | 0.40% | $9.3M | trimmed -24.9% | 2025 Q4 |
| Penserra Capital Management LLC | 293.2k | 0.40% | $9.3M | trimmed -24.9% | 2025 Q2 |
| Alyeska Investment Group | 290.6k | 0.39% | $9.2M | opened | 2025 Q3 |
| Allspring Global Investments Holdings, LLC | 283.9k | 0.39% | $9.0M | added +137.9% | 2025 Q2 |
| Hillsdale Investment Management INC. | 280.5k | 0.38% | $8.9M | unchanged | 2025 Q2 |
| SEI Investments CO | 225.5k | 0.30% | $7.2M | trimmed -20.1% | 2024 Q2 |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 222.6k | 0.30% | $7.1M | added +21.7% | 2025 Q1 |
| BNP Paribas Financial Markets | 206.3k | 0.28% | $6.6M | trimmed -24.1% | ≤2013 |
| Acadian Asset Management | 206.2k | 0.28% | $6.6M | trimmed -59.6% | 2019 Q3 |
| First Eagle Investment Management | 200.0k | 0.27% | $6.4M | trimmed -5.4% | 2023 Q3 |
| Rhumbline Advisers | 196.5k | 0.27% | $6.2M | added +2.3% | ≤2013 |
| American Century Companies INC | 188.2k | 0.26% | $6.0M | added +1.5% | 2024 Q2 |
Largest 50 of 273 shown; the full ranked, searchable register is at boothcheck.com/holders/NTCT. 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.