15 institutions reported holding $8.2M of TESCO PLC (TSCDY) in SEC 13F filings for 2026-03-31. Largest institutional holders: GREAT LAKES ADVISORS, LLC ($3.0M), Ativo Capital Management LLC ($1.7M), RHUMBLINE ADVISERS ($1.1M), Calydon Capital ($680,227), CHICAGO TRUST Co NA ($487,101). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | GREAT LAKES ADVISORS, LLC | $3.0M | 155,850 | Added |
| 2 | Ativo Capital Management LLC | $1.7M | 88,482 | Hold |
| 3 | RHUMBLINE ADVISERS | $1.1M | 55,736 | Added |
| 4 | Calydon Capital | $680,227 | 35,745 | Trimmed |
| 5 | CHICAGO TRUST Co NA | $487,101 | 26,026 | Added |
| 6 | YOUSIF CAPITAL MANAGEMENT, LLC | $457,017 | 24,418 | Hold |
| 7 | GAMMA Investing LLC | $359,020 | 18,866 | Trimmed |
| 8 | ATLAS CAPITAL ADVISORS INC. | $217,322 | 11,420 | Added |
| 9 | HANTZ FINANCIAL SERVICES, INC. | $132,000 | 6,950 | Trimmed |
| 10 | PNC Financial Services Group, Inc. | $66,243 | 3,481 | Added |
| 11 | Salomon & Ludwin, LLC | $35,295 | 1,810 | Added |
| 12 | Ancora Advisors LLC | $9,230 | 485 | Hold |
| 13 | IMA Advisory Services, Inc. | $2,607 | 137 | Trimmed |
| 14 | AMERIFLEX GROUP, INC. | $0 | 0 | Exited |
| 15 | Signature Equity Partners, LLC | $0 | 0 | Exited |
Source: SEC Form 13F filings · as of 2026-03-31