5 institutions reported holding $1.1M of PROTO LABS INC (PRLB) in SEC 13F filings for 2026-06-30. Largest institutional holders: Assenagon Asset Management S.A. ($997,519), GAMMA Investing LLC ($99,361), Versant Capital Management, Inc ($36,516), MassMutual Private Wealth & Trust, FSB ($734), Cedar Mountain Advisors, LLC ($326). Source: SEC Form 13F.
| Rank | Institution | Value | Shares | Change |
|---|---|---|---|---|
| 1 | Assenagon Asset Management S.A. | $997,519 | 12,238 | Trimmed |
| 2 | GAMMA Investing LLC | $99,361 | 1,219 | Added |
| 3 | Versant Capital Management, Inc | $36,516 | 448 | Hold |
| 4 | MassMutual Private Wealth & Trust, FSB | $734 | 9 | Hold |
| 5 | Cedar Mountain Advisors, LLC | $326 | 4 | Hold |
Source: SEC Form 13F filings · as of 2026-06-30