18 institutions reported holding $180.0M of TMS INTERNATIONAL CORP (TMS) in SEC 13F filings for 2026-06-30. Largest institutional holders: T. Rowe Price Investment Management, Inc. ($107.2M), Hudson Bay Capital Management LP ($32.9M), StepStone Group LP ($16.4M), Euclidean Capital LLC ($9.0M), Alyeska Investment Group, L.P. ($4.5M). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | T. Rowe Price Investment Management, Inc. | $107.2M | 13.0M | New |
| 2 | Hudson Bay Capital Management LP | $32.9M | 4.0M | New |
| 3 | StepStone Group LP | $16.4M | 2.0M | New |
| 4 | Euclidean Capital LLC | $9.0M | 1.1M | New |
| 5 | Alyeska Investment Group, L.P. | $4.5M | 543,748 | New |
| 6 | Harraden Circle Investments, LLC | $3.9M | 479,167 | New |
| 7 | Round Rock Advisors, LLC | $2.3M | 277,236 | New |
| 8 | HEALTHCARE OF ONTARIO PENSION PLAN TRUST FUND | $2.3M | 276,000 | New |
| 9 | Cannell & Spears LLC | $678,355 | 82,525 | New |
| 10 | K2 PRINCIPAL FUND, L.P. | $281,568 | 34,254 | New |
| 11 | MILLENNIUM MANAGEMENT LLC | $195,620 | 23,798 | New |
| 12 | NOTABLE CAPITAL MANAGEMENT, L.L.C. | $174,322 | 21,207 | New |
| 13 | GEODE CAPITAL MANAGEMENT, LLC | $132,588 | 16,130 | New |
| 14 | UBS Group AG | $12,791 | 1,556 | New |
| 15 | JNBA Financial Advisors | $8,426 | 1,025 | New |
| 16 | MORGAN STANLEY | $403 | 49 | New |
| 17 | JPMORGAN CHASE & CO | $26 | 3 | New |
| 18 | HUNTINGTON NATIONAL BANK | $17 | 1 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30