Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
407 institutional managers reported holding TDC for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 60%. 74 opened new positions; 61 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 14.00M | 14.49% | $358.8M | added +8% | ≤2013 |
| BlackRock | 12.55M | 12.99% | $321.7M | added +2.4% | ≤2013 |
| Lynrock Lake LP (focused) | 9.35M | 9.68% | $239.8M | trimmed -0.7% | 2019 Q2 |
| Ameriprise Financial INC | 4.16M | 4.30% | $106.5M | added +45.1% | ≤2013 |
| LSV Asset Management | 3.43M | 3.55% | $87.8M | added +31.8% | 2024 Q3 |
| State Street | 3.34M | 3.46% | $85.6M | added +4.3% | ≤2013 |
| Boston Partners | 3.22M | 3.33% | $82.5M | added +70.2% | 2024 Q2 |
| Morgan Stanley | 2.54M | 2.63% | $65.2M | trimmed -19.3% | ≤2013 |
| Geode Capital | 2.54M | 2.63% | $65.1M | added +16.1% | ≤2013 |
| AQR Capital | 2.36M | 2.44% | $60.5M | trimmed -27.5% | ≤2013 |
| Fuller & Thaler Asset Management, INC. | 2.29M | 2.37% | $58.8M | added +4% | 2025 Q4 |
| UBS | 2.13M | 2.21% | $54.6M | added +92.1% | ≤2013 |
| Allianz Asset Management GmbH | 2.10M | 2.17% | $53.7M | added +27.6% | 2021 Q1 |
| Citadel Advisors | 1.97M | 2.04% | $50.6M | added +767% | ≤2013 |
| Dimensional Fund Advisors | 1.91M | 1.97% | $48.9M | added +11.8% | ≤2013 |
| Charles Schwab Investment Management | 1.50M | 1.55% | $38.4M | added +12.7% | ≤2013 |
| Arrowstreet Capital | 1.40M | 1.45% | $35.9M | added +20.9% | 2017 Q2 |
| Victory Capital Management INC | 1.37M | 1.42% | $35.1M | added +3429.9% | 2014 Q2 |
| Defiance ETFs, LLC | 1.33M | 1.38% | $34.1M | added +5.3% | 2025 Q4 |
| Penserra Capital Management LLC | 1.33M | 1.38% | $34.1M | added +5.3% | 2018 Q3 |
| Bank OF America CORP /DE/ | 1.32M | 1.37% | $33.8M | added +21.7% | ≤2013 |
| Goldman Sachs | 1.32M | 1.37% | $33.8M | added +39.8% | ≤2013 |
| Gotham Asset Management | 1.32M | 1.36% | $33.8M | added +13.5% | 2020 Q2 |
| Quantinno Capital Management LP | 1.29M | 1.34% | $33.2M | added +1158.9% | 2024 Q3 |
| Nuveen | 1.22M | 1.26% | $31.2M | added +28.8% | 2019 Q2 |
| Qube Research & Technologies LTD | 888.6k | 0.92% | $22.8M | opened | 2024 Q3 |
| First Trust Advisors LP | 866.6k | 0.90% | $22.2M | added +83.9% | 2025 Q1 |
| FMR (Fidelity) | 862.4k | 0.89% | $22.1M | trimmed -42.8% | ≤2013 |
| Mirae Asset Global Etfs Holdings LTD. | 848.4k | 0.88% | $21.7M | trimmed -5.9% | 2020 Q3 |
| Robeco Institutional Asset Management B.v. | 769.3k | 0.80% | $19.7M | added +36.4% | 2016 Q3 |
| Lazard Asset Management LLC | 763.4k | 0.79% | $19.6M | added +8.7% | 2021 Q1 |
| Northern Trust | 749.9k | 0.78% | $19.2M | unchanged | ≤2013 |
| Franklin Resources | 743.0k | 0.77% | $19.0M | added +79.9% | 2021 Q3 |
| Parsifal Capital Management, LP (focused) | 714.9k | 0.74% | $18.3M | opened | 2026 Q1 |
| Russell Investments Group, LTD. | 653.6k | 0.68% | $16.8M | added +30.2% | 2016 Q4 |
| BNY Mellon | 596.4k | 0.62% | $15.3M | added +1.6% | ≤2013 |
| Impax Asset Management Group plc | 547.0k | 0.57% | $14.0M | opened | 2026 Q1 |
| Invesco | 545.5k | 0.56% | $14.0M | added +0.9% | ≤2013 |
| Prudential Financial INC | 541.0k | 0.56% | $13.9M | added +46% | ≤2013 |
| Public Sector Pension Investment Board | 453.9k | 0.47% | $11.6M | added +13.8% | 2025 Q1 |
| Principal Financial Group INC | 451.5k | 0.47% | $11.6M | added +2% | ≤2013 |
| Pacer Advisors, INC. | 449.3k | 0.47% | $11.5M | opened | 2020 Q3 |
| Janus Henderson | 423.5k | 0.44% | $10.9M | unchanged | 2021 Q3 |
| BI Asset Management Fondsmaeglerselskab A/S | 422.2k | 0.44% | $10.8M | opened | 2026 Q1 |
| LOS Angeles Capital Management LLC | 420.2k | 0.43% | $10.8M | added +78589.5% | 2025 Q4 |
| Corient Private Wealth LLC | 420.0k | 0.43% | $10.8M | added +4450.7% | 2025 Q2 |
| T. Rowe Price | 367.7k | 0.38% | $9.4M | added +2.3% | ≤2013 |
| Marathon Asset Management LTD | 347.8k | 0.36% | $8.9M | added +13.6% | 2021 Q4 |
| Archon Capital Management LLC (focused) | 346.2k | 0.36% | $8.9M | added +10.5% | 2025 Q1 |
| BNP Paribas Financial Markets | 345.0k | 0.36% | $8.8M | trimmed -2.6% | ≤2013 |
Largest 50 of 407 shown; the full ranked, searchable register is at boothcheck.com/holders/TDC. 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.