PROTO LABS INC (PRLB) Institutional Ownership Changes & 13F Activity

PROTO LABS INC (PRLB). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Disciplined Growth Investors, Polen Capital Management, Renaissance Technologies LLC, ARK Invest, and Mairs & Power Growth Fund.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Disciplined Growth InvestorsSell-176,3742,497,355$142,399,182
Q1 2026Polen Capital ManagementBuy33,44637,594$2,143,610
Q1 2026Renaissance Technologies LLCBuy26,700520,251$29,664,712
Q1 2026ARK InvestSell-11,04045,704$2,606,042
Q4 2025Disciplined Growth InvestorsBuy81,3562,673,729$135,263,950
Q4 2025Renaissance Technologies LLCSell-50,100493,551$24,968,745
Q4 2025ARK InvestSell-15,05356,744$2,870,679
Q4 2025Polen Capital ManagementBuy4,1484,148$209,847
Q3 2025Disciplined Growth InvestorsSell-129,6382,592,373$129,696,421
Q3 2025ARK InvestSell-7,70271,797$3,592,004
Q3 2025Renaissance Technologies LLCBuy1,600543,651$27,198,860
Q2 2025Disciplined Growth InvestorsBuy51,2932,722,011$108,989,320
Q2 2025Renaissance Technologies LLCBuy10,400542,051$21,703,722
Q2 2025ARK InvestSell-7,54779,499$3,183,140
Q1 2025Disciplined Growth InvestorsBuy497,0192,670,718$93,581,959
Q1 2025ARK InvestSell-41,46587,046$3,050,092
Q1 2025Renaissance Technologies LLCSell-40,200531,651$18,629,051
Q4 2024Disciplined Growth InvestorsBuy117,1062,173,699$84,969,894
Q4 2024Renaissance Technologies LLCBuy15,000571,851$22,353,656
Q4 2024ARK InvestBuy4,750128,511$5,023,495
Q3 2024Renaissance Technologies LLCBuy121,028556,851$16,354,714
Q3 2024Disciplined Growth InvestorsBuy110,2442,056,593$60,402,136
Q3 2024ARK InvestSell-9,205123,761$3,634,861
Q2 2024Renaissance Technologies LLCBuy106,423435,823$13,462,572
Q2 2024Disciplined Growth InvestorsBuy36,5101,946,349$60,122,721
Q2 2024ARK InvestSell-3,497132,966$4,107,320
Q1 2024Disciplined Growth InvestorsBuy170,2011,909,839$68,276,744
Q1 2024ARK InvestSell-41,882136,463$4,878,552
Q1 2024Renaissance Technologies LLCBuy39,800329,400$11,776
Q4 2023Disciplined Growth InvestorsSell-24,7591,739,638$67,776,296

Frequently asked questions about PRLB activity

  • Which institutional owners are buying PRLB?

    Institutional owners buying PRLB include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in PRLB activity?

    "Buy" means an investor increased their reported position in PRLB compared to the prior reporting period. This reflects growing exposure to PROTO LABS INC (PRLB) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in PRLB increasing?

    Institutional interest in PRLB can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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