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 (Q2 2026). This page analyzes institutional buying and selling activity, new holdings, and sold-out positions in the latest reporting period. Notable filers include Rubric Capital Management Lp, Goldman Sachs Group Inc, Disciplined Growth Investors, Invesco Ltd., and Lazard Asset Management Llc.

InstitutionTypeChange in sharesChange Position %SharesReported stock balancePortfolio quarterFiling date
Envestnet Asset Management IncBuy+2,812—2,812$229.21KQ2 2026Sep 23, 2026
State Street CorpBuy+46,462+4.3%1,138,462$92.80MQ2 2026Sep 22, 2026
Manufacturers Life Insurance Company, TheSell-202-2.1%9,335$760.90KQ2 2026Sep 09, 2026
Citadel Advisors LlcBuy+44,107+99.1%88,625$7.22MQ2 2026Sep 02, 2026
Allianz Asset Management GmbhSell-1,592-17.5%7,523$613.20KQ2 2026Sep 02, 2026
Corient Private Wealth LlcBuy+1,723+16.1%12,427$1.01MQ2 2026Aug 27, 2026
California State Teachers Retirement SystemBuy+4,077+17.8%27,044$2.20MQ2 2026Aug 24, 2026
Assenagon Asset Management S.A.Sell-34,538-73.8%12,238$997.52KQ2 2026Aug 21, 2026
Mercer Global Advisors IncBuy+2,135+30.6%9,101$741.85KQ2 2026Aug 19, 2026
Fulcrum Asset Management LlpBuy+18—18$1.44KQ2 2026Aug 18, 2026
Jefferies Financial Group Inc.Buy+10,710—10,710$872.97KQ2 2026Aug 17, 2026
Public Employees Retirement System Of OhioSell-45-9.1%451$36.76KQ2 2026Aug 17, 2026
Transamerica Financial Advisors, LlcBuy+14—14$1.14KQ2 2026Aug 17, 2026
Rubric Capital Management LpSell-377,708-77.7%108,692$8.86MQ2 2026Aug 14, 2026
Goldman Sachs Group IncBuy+262,236+186.1%403,179$32.86MQ2 2026Aug 14, 2026
Disciplined Growth InvestorsSell-116,841-4.7%2,380,514$194.04MQ2 2026Aug 14, 2026
Invesco Ltd.Buy+108,421—108,421$8.84MQ2 2026Aug 14, 2026
Lazard Asset Management LlcSell-92,247-92.9%7,086$577.58KQ2 2026Aug 14, 2026
Jane Street Group, LlcBuy+86,172+150.2%143,527$11.70MQ2 2026Aug 14, 2026
Ameriprise Financial IncBuy+69,786—69,786$5.69MQ2 2026Aug 14, 2026
Millennium Management LlcBuy+67,131+259.9%92,960$7.58MQ2 2026Aug 14, 2026
Trexquant Investment LpSell-54,469-79.3%14,219$1.16MQ2 2026Aug 14, 2026
Exoduspoint Capital Management, LpBuy+33,683—33,683$2.75MQ2 2026Aug 14, 2026
Squarepoint Ops LlcSell-24,881-60.2%16,439$1.34MQ2 2026Aug 14, 2026
Susquehanna Fundamental Investments, LlcBuy+23,435+227.0%33,760$2.75MQ2 2026Aug 14, 2026
Sei Investments CoBuy+15,256+173.0%24,075$1.96MQ2 2026Aug 14, 2026
D. E. Shaw & Co., Inc.Sell-14,285-6.3%211,366$17.23MQ2 2026Aug 14, 2026
Xtx Topco LtdSell-13,213-83.2%2,660$216.82KQ2 2026Aug 14, 2026
Wells Fargo & Company/MnBuy+12,910+110.1%24,633$2.01MQ2 2026Aug 14, 2026
Engineers Gate Manager LpBuy+12,280+84.7%26,780$2.18MQ2 2026Aug 14, 2026
Showing 30 of 257

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.