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Who owns Proto Labs (PRLB) stock

256 funds reported Proto Labs (PRLB) shares in their latest 13F filings, worth $1.9B in all. The largest holder is BlackRock ($318M). Last quarter 124 funds added to their stakes and 108 cut them.

Largest holders of PRLB (13F)Largest holders of PRLB (13F)BlackRock$318MDisciplined Growth Investors$194MVanguard Group$135MVanguard Portfolio Management LLC$130MDimensional Fund Advisors LP$93.9MState Street$92.8MVanguard Capital Management LLC$86.0MAmerican Capital Management$50.5MGeode Capital Management, LLC$50.1MRenaissance Technologies LLC$38.2M

Largest holders (13F)

FundSharesValueChangeQuarter
BlackRock3,896,222$318Mincrease2026-06-30
Disciplined Growth Investors2,380,514$194Mdecrease2026-06-30
Vanguard Group2,666,227$135Mdecrease2025-12-31
Vanguard Portfolio Management LLC1,599,765$130Mincrease2026-06-30
Dimensional Fund Advisors LP1,152,305$93.9Mdecrease2026-06-30
State Street1,138,462$92.8Mincrease2026-06-30
Vanguard Capital Management LLC1,054,623$86.0Mincrease2026-06-30
American Capital Management619,845$50.5Mdecrease2026-06-30
Geode Capital Management, LLC614,028$50.1Mincrease2026-06-30
Renaissance Technologies LLC469,251$38.2Mdecrease2026-06-30
Prudential Financial457,810$37.3Mincrease2026-06-30
FMR LLC442,659$36.1Mincrease2026-06-30
Arrowstreet Capital, Limited Partnership440,816$35.9Mdecrease2026-06-30
Nuveen, LLC420,059$34.2Mincrease2026-06-30
Goldman Sachs Group403,179$32.9Mincrease2026-06-30

Proto Labs' latest quarter

Proto Labs, Q3 2026: revenue $154M (+14% year over year), operating margin 9.4%, net earnings $11.8M, operating cash flow $22.8M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most PRLB stock?

By the latest 13F filings: BlackRock ($318M); Disciplined Growth Investors ($194M); Vanguard Group ($135M); Vanguard Portfolio Management LLC ($130M); Dimensional Fund Advisors LP ($93.9M).

What is the short interest in PRLB?

653,218 shares were sold short at the 2026-10-15 settlement, -11.71% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.