PROTO LABS INC (PRLB) Institutional Ownership and Insiders Activity

PROTO LABS INC (PRLB) is widely held by institutional investors, with 4 tracked firms reporting positions valued at approximately $176.81M based on SEC Form 13F filings for the quarter ended March 31, 2026.

Disciplined Growth Investors is the largest disclosed holder, reporting approximately $142.40M in PRLB holdings in its latest filing.

Institutional ownership among tracked investors remains highly concentrated, with Disciplined Growth Investors representing the majority of disclosed value.