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 $177.52M 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.

Recent insider activity includes 11 tracked Form 4 transactions over the last three months, reflecting ongoing executive and director trading activity.