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Proto Labs Inc(PRLB US)

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Overview

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CategorizedChronologicalBy Owner

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FinancialsChartingShort InterestEmployees
Logo
  • Home
  • AI Agent
  • Annotations
  • Files
  • Pricing and plans
  • BlogAboutContact us
    APIMCP
    Terms of servicePrivacy policy

  • Get the full experience

    We save the real magic for signed-in users.

HomeStock ScreenerDocument SearchChartingWatchlistsRecent Filings

Proto Labs Inc(PRLB US)

Doc SearchProfileEntity StructureFinancialsChartingShort InterestEmployees

Overview

ProfileEntity Structure

Documents

SEC Filings
CategorizedChronologicalBy Owner

Financials & Metrics

FinancialsChartingShort InterestEmployees
PRLB US​
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PRLB US​
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SEC Filings by Owner

SEC Filings by Owner

Insider Ownership

Gawlick Rainer(40)

  • Form 4Statement of changes in beneficial ownership4 Nov
  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership7 Aug 2025
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021

KRANTZ DONALD G(35)

  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership17 May 2019

Goodman John B(35)

  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership3 Mar 2021
  • Form 4Statement of changes in beneficial ownership26 Aug 2020
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership17 May 2019
  • Form 4Statement of changes in beneficial ownership18 Sep 2018
  • Form 4Statement of changes in beneficial ownership18 Jun 2018
  • Form 4Statement of changes in beneficial ownership18 May 2018
  • Form 4Statement of changes in beneficial ownership16 Mar 2018
  • Form 4Statement of changes in beneficial ownership14 Feb 2018

Bodor Robert(31)

  • Form 4Statement of changes in beneficial ownership27 Feb 2025
  • Form 4Statement of changes in beneficial ownership18 Feb 2025
  • Form 4Statement of changes in beneficial ownership9 Sep 2024
  • Form 4Statement of changes in beneficial ownership15 Feb 2024
  • Form 4Statement of changes in beneficial ownership15 Feb 2023
  • Form 4Statement of changes in beneficial ownership17 Feb 2022
  • Form 4Statement of changes in beneficial ownership6 Dec 2021
  • Form 4Statement of changes in beneficial ownership3 Mar 2021
  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership4 May 2020

Cleveland Bradley A.(29)

  • Form 4Statement of changes in beneficial ownership22 May 2014
  • Form 4Statement of changes in beneficial ownership12 Nov 2013
  • Form 4Statement of changes in beneficial ownership8 Nov 2013
  • Form 4Statement of changes in beneficial ownership6 Nov 2013
  • Form 4Statement of changes in beneficial ownership11 Sep 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)26 Sep 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)26 Sep 2013
  • Form 4Statement of changes in beneficial ownership2 May 2013
  • Form 4Statement of changes in beneficial ownership3 Apr 2013
  • Form 4Statement of changes in beneficial ownership21 Mar 2013

Tumelty John B.(26)

  • Form 4/AStatement of changes in beneficial ownership (amendment)30 Nov 2017
  • Form 4Statement of changes in beneficial ownership27 Nov 2017
  • Form 4/AStatement of changes in beneficial ownership (amendment)30 Nov 2017
  • Form 4Statement of changes in beneficial ownership10 May 2017
  • Form 4Statement of changes in beneficial ownership15 Feb 2017
  • Form 4Statement of changes in beneficial ownership4 Apr 2016
  • Form 4Statement of changes in beneficial ownership19 Feb 2016
  • Form 4Statement of changes in beneficial ownership10 Feb 2016
  • Form 4/AStatement of changes in beneficial ownership (amendment)11 Feb 2016
  • Form 4Statement of changes in beneficial ownership18 Aug 2015

WEHRWEIN SVEN(25)

  • Form 4Statement of changes in beneficial ownership4 Jun
  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership12 Aug 2020

Schneider Jacqueline D.(21)

  • Form 4Statement of changes in beneficial ownership6 Apr 2016
  • Form 4Statement of changes in beneficial ownership19 Feb 2016
  • Form 4/AStatement of changes in beneficial ownership (amendment)11 Feb 2016
  • Form 4Statement of changes in beneficial ownership10 Feb 2016
  • Form 4Statement of changes in beneficial ownership27 Jul 2015
  • Form 4Statement of changes in beneficial ownership17 Apr 2015
  • Form 4Statement of changes in beneficial ownership19 Feb 2015
  • Form 4Statement of changes in beneficial ownership11 Feb 2015
  • Form 4Statement of changes in beneficial ownership1 Jul 2014
  • Form 4Statement of changes in beneficial ownership18 Feb 2014

Schumacher Daniel(20)

  • Form 4Statement of changes in beneficial ownership25 Sep
  • Form 4Statement of changes in beneficial ownership18 Sep
  • Form 4Statement of changes in beneficial ownership22 May
  • Form 4Statement of changes in beneficial ownership27 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership12 Feb
  • Form 4Statement of changes in beneficial ownership4 Feb
  • Form 4Statement of changes in beneficial ownership22 May 2025
  • Form 4Statement of changes in beneficial ownership27 Feb 2025
  • Form 4Statement of changes in beneficial ownership18 Feb 2025

WAY JOHN(19)

  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership10 Aug 2020
  • Form 4Statement of changes in beneficial ownership18 Feb 2020
  • Form 4Statement of changes in beneficial ownership12 Feb 2020
  • Form 4Statement of changes in beneficial ownership3 Dec 2019
  • Form 4Statement of changes in beneficial ownership15 Feb 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019
  • Form 4Statement of changes in beneficial ownership19 Dec 2018
  • Form 4Statement of changes in beneficial ownership26 Sep 2018
  • Form 4Statement of changes in beneficial ownership28 Aug 2018

Baker Arthur R. III(18)

  • Form 4Statement of changes in beneficial ownership17 Feb 2022
  • Form 4Statement of changes in beneficial ownership1 Dec 2021
  • Form 4Statement of changes in beneficial ownership6 May 2021
  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership20 May 2020
  • Form 4Statement of changes in beneficial ownership6 May 2020
  • Form 4Statement of changes in beneficial ownership18 Feb 2020
  • Form 4Statement of changes in beneficial ownership12 Feb 2020
  • Form 4Statement of changes in beneficial ownership7 May 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019

Kenison Michael R.(18)

  • Form 4Statement of changes in beneficial ownership13 May
  • Form 4Statement of changes in beneficial ownership8 May
  • Form 4Statement of changes in beneficial ownership27 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership12 Feb
  • Form 4Statement of changes in beneficial ownership9 Feb
  • Form 4Statement of changes in beneficial ownership4 Feb
  • Form 4Statement of changes in beneficial ownership26 Nov 2025
  • Form 4/AStatement of changes in beneficial ownership (amendment)3 Dec 2025
  • Form 4Statement of changes in beneficial ownership22 May 2025

Smith Brian K(17)

  • Form 4Statement of changes in beneficial ownership23 May 2016
  • Form 4/AStatement of changes in beneficial ownership (amendment)4 Jun 2015
  • Form 4Statement of changes in beneficial ownership22 May 2015
  • Form 4Statement of changes in beneficial ownership24 Mar 2015
  • Form 4Statement of changes in beneficial ownership22 May 2014
  • Form 4Statement of changes in beneficial ownership5 Sep 2013
  • Form 4Statement of changes in beneficial ownership7 Aug 2013
  • Form 4Statement of changes in beneficial ownership28 May 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)31 May 2013
  • Form 4Statement of changes in beneficial ownership7 May 2013

HOLT VICTORIA M(16)

  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership8 Sep 2020
  • Form 4Statement of changes in beneficial ownership11 Mar 2020
  • Form 4Statement of changes in beneficial ownership18 Feb 2020
  • Form 4Statement of changes in beneficial ownership12 Feb 2020
  • Form 4Statement of changes in beneficial ownership15 Feb 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019
  • Form 4Statement of changes in beneficial ownership16 Feb 2018
  • Form 4Statement of changes in beneficial ownership14 Feb 2018
  • Form 4Statement of changes in beneficial ownership15 Feb 2017

Black Archie C.(15)

  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership17 May 2019

Chand Sujeet(13)

  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership17 May 2019

Klaas Bjoern(13)

  • Form 4Statement of changes in beneficial ownership15 Feb 2024
  • Form 4Statement of changes in beneficial ownership15 Feb 2023
  • Form 4Statement of changes in beneficial ownership17 Feb 2022
  • Form 4Statement of changes in beneficial ownership15 Feb 2022
  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership3 Dec 2020
  • Form 4Statement of changes in beneficial ownership18 Feb 2020
  • Form 4Statement of changes in beneficial ownership12 Feb 2020
  • Form 4Statement of changes in beneficial ownership3 Dec 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019

LUKIS LAWRENCE J(11)

  • Form 5/AAnnual statement of beneficial ownership (amendment)12 Feb 2016
  • Form 5Annual statement of beneficial ownership10 Feb 2016
  • Form 4Statement of changes in beneficial ownership1 Sep 2015
  • Form 4Statement of changes in beneficial ownership5 Aug 2015
  • Form 5Annual statement of beneficial ownership30 Jan 2015
  • Form 4Statement of changes in beneficial ownership20 Feb 2014
  • Form 5Annual statement of beneficial ownership15 Jan 2014
  • Form 4Statement of changes in beneficial ownership7 Aug 2013
  • Form 5Annual statement of beneficial ownership14 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012

LOFTUS MARGARET A(11)

  • Form 4Statement of changes in beneficial ownership17 Mar 2014
  • Form 4Statement of changes in beneficial ownership4 Sep 2013
  • Form 4Statement of changes in beneficial ownership31 May 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)31 May 2013
  • Form 4Statement of changes in beneficial ownership28 May 2013
  • Form 4Statement of changes in beneficial ownership8 Mar 2013
  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 4Statement of changes in beneficial ownership6 Sep 2012
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 4Statement of changes in beneficial ownership27 Feb 2012

Chin Moonhie(11)

  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership5 Aug 2019

Greiner Stacy(8)

  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership22 Nov 2021
  • Form 3Initial statement of beneficial ownership22 Nov 2021

KOHRS DOUGLAS W(7)

  • Form 4Statement of changes in beneficial ownership22 May 2015
  • Form 4/AStatement of changes in beneficial ownership (amendment)4 Jun 2015
  • Form 4Statement of changes in beneficial ownership22 May 2014
  • Form 4Statement of changes in beneficial ownership28 May 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)31 May 2013
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership4 Apr 2012

JUDD JOHN R(7)

  • Form 4Statement of changes in beneficial ownership1 Aug 2014
  • Form 4Statement of changes in beneficial ownership18 Feb 2014
  • Form 4Statement of changes in beneficial ownership1 Nov 2013
  • Form 4Statement of changes in beneficial ownership5 Aug 2013
  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Bolton Edward E.(7)

  • Form 4Statement of changes in beneficial ownership13 May 2013
  • Form 4Statement of changes in beneficial ownership1 Mar 2013
  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 5Annual statement of beneficial ownership14 Feb 2013
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012
  • Form 4Statement of changes in beneficial ownership27 Feb 2012

Dietrick William M.(7)

  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 4Statement of changes in beneficial ownership17 Jan 2013
  • Form 5Annual statement of beneficial ownership14 Feb 2013
  • Form 4Statement of changes in beneficial ownership29 Nov 2012
  • Form 4Statement of changes in beneficial ownership29 Oct 2012
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

FEIN DAVID M(7)

  • Form 4Statement of changes in beneficial ownership15 Feb 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019
  • Form 4Statement of changes in beneficial ownership16 Feb 2018
  • Form 4Statement of changes in beneficial ownership14 Feb 2018
  • Form 4Statement of changes in beneficial ownership15 Feb 2017
  • Form 3Initial statement of beneficial ownership21 Dec 2016
  • Form 4Statement of changes in beneficial ownership21 Dec 2016

Krishna Suresh(6)

  • Form 4Statement of changes in beneficial ownership4 Nov
  • Form 4Statement of changes in beneficial ownership27 May
  • Form 4Statement of changes in beneficial ownership27 Feb
  • Form 4Statement of changes in beneficial ownership6 Aug 2025
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 3Initial statement of beneficial ownership28 May 2025

Kubicek Mark R.(6)

  • Form 4Statement of changes in beneficial ownership4 Oct 2012
  • Form 4Statement of changes in beneficial ownership10 Sep 2012
  • Form 4Statement of changes in beneficial ownership6 Sep 2012
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 4Statement of changes in beneficial ownership27 Feb 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Ryaboy Oleg(6)

  • Form 4Statement of changes in beneficial ownership27 Feb 2025
  • Form 4Statement of changes in beneficial ownership18 Feb 2025
  • Form 4Statement of changes in beneficial ownership15 Feb 2024
  • Form 4Statement of changes in beneficial ownership15 Feb 2023
  • Form 4Statement of changes in beneficial ownership13 Sep 2022
  • Form 3Initial statement of beneficial ownership13 Sep 2022

KINGSLEY DOUGLAS A(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

DAMORE RICHARD A(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

ANDERSON EDWARD T(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

NORTH BRIDGE GROWTH EQUITY I LP(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

NBGE Manager, LLC(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

NBGE GP, LLC(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

North Bridge Growth Management, L.P.(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Langton William R.(3)

  • Form 4Statement of changes in beneficial ownership4 Oct 2012
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Pang Thomas H(3)

  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Blodgett Matthew C(3)

  • Form 4Statement of changes in beneficial ownership11 Jul 2013
  • Form 4Statement of changes in beneficial ownership16 May 2013
  • Form 3Initial statement of beneficial ownership7 Mar 2013

Kermisch Marc(3)

  • Form 4Statement of changes in beneficial ownership27 Feb
  • Form 4Statement of changes in beneficial ownership19 Nov 2025
  • Form 3Initial statement of beneficial ownership15 Oct 2025

Protomold Investment Company, LLC(2)

  • Form 4Statement of changes in beneficial ownership23 Aug 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Parlange Bernardo(2)

  • Form 4Statement of changes in beneficial ownership22 May
  • Form 3Initial statement of beneficial ownership22 May

Ramahi Salam(1)

  • Form 3Initial statement of beneficial ownership10 Sep

≥5% Ownership

VANGUARD GROUP INC(13)

  • SC 13G/AProto Labs Inc27 Mar
  • SC 13G/AProto Labs Inc13 Feb 2024
  • SC 13G/AProto Labs Inc9 Feb 2023
  • SC 13G/AProto Labs Inc9 Mar 2022
  • SC 13G/AProto Labs Inc10 Feb 2022
  • SC 13G/AProto Labs Inc10 Feb 2021
  • SC 13G/AProto Labs Inc12 Feb 2020
  • SC 13G/AProto Labs Inc11 Mar 2019
  • SC 13G/AProto Labs Inc12 Feb 2019
  • SC 13G/AProto Labs Inc12 Feb 2018

BROWN CAPITAL MANAGEMENT LLC(13)

  • SC 13G/AProto Labs Inc14 Feb 2023
  • SC 13G/AProto Labs Inc14 Feb 2022
  • SC 13G/AProto Labs Inc10 Jun 2021
  • SC 13G/AProto Labs Inc12 Feb 2021
  • SC 13G/AProto Labs Inc14 Feb 2020
  • SC 13G/AProto Labs Inc14 Feb 2019
  • SC 13G/AProto Labs Inc14 Feb 2018
  • SC 13G/AProto Labs Inc9 Feb 2017
  • SC 13G/AProto Labs Inc5 Oct 2016
  • SC 13G/AProto Labs Inc5 Feb 2016

DISCIPLINED GROWTH INVESTORS INC /MN(11)

  • SC 13G/AProto Labs Inc14 Aug
  • SC 13G/AProto Labs Inc15 May
  • SC 13G/AProto Labs Inc17 Feb
  • SC 13G/AProto Labs Inc14 Nov 2025
  • SC 13G/AProto Labs Inc14 Aug 2025
  • SC 13G/AProto Labs Inc15 May 2025
  • SC 13G/AProto Labs Inc14 Feb 2025
  • SC 13G/AProto Labs Inc14 Nov 2024
  • SC 13G/AProto Labs Inc14 Feb 2024
  • SC 13G/AProto Labs Inc14 Feb 2023

RIVERBRIDGE PARTNERS LLC(10)

  • SC 13G/AProto Labs Inc21 Jan 2022
  • SC 13G/AProto Labs Inc21 Jan 2022
  • SC 13G/AProto Labs Inc25 Jan 2021
  • SC 13G/AProto Labs Inc5 Feb 2020
  • SC 13G/AProto Labs Inc25 Jan 2019
  • SC 13G/AProto Labs Inc29 Jan 2018
  • SC 13G/AProto Labs Inc24 Jan 2017
  • SC 13G/AProto Labs Inc1 Feb 2016
  • SC 13G/AProto Labs Inc29 Jan 2015
  • SC 13GProto Labs Inc5 Feb 2014

BlackRock Inc.(9)

  • SC 13G/AProto Labs Inc22 Jan 2024
  • SC 13G/AProto Labs Inc23 Jan 2023
  • SC 13G/AProto Labs Inc27 Jan 2022
  • SC 13G/AProto Labs Inc26 Jan 2022
  • SC 13GProto Labs Inc25 Jan 2021
  • SC 13G/AProto Labs Inc4 Feb 2020
  • SC 13G/AProto Labs Inc31 Jan 2019
  • SC 13G/AProto Labs Inc19 Jan 2018
  • SC 13GProto Labs Inc9 Jan 2017

LUKIS LAWRENCE J(6)

  • SC 13G/AProto Labs Inc15 Jan 2019
  • SC 13G/AProto Labs Inc14 Feb 2018
  • SC 13G/AProto Labs Inc16 Feb 2016
  • SC 13G/AProto Labs Inc17 Feb 2015
  • SC 13G/AProto Labs Inc14 Feb 2014
  • SC 13GProto Labs Inc14 Feb 2013

WELLS FARGO & COMPANY/MN(3)

  • SC 13G/AProto Labs Inc10 Jul 2015
  • SC 13G/AProto Labs Inc5 Feb 2015
  • SC 13GProto Labs Inc27 Jan 2014

KORNITZER CAPITAL MANAGEMENT INC /KS(3)

  • SC 13G/AProto Labs Inc22 Jan 2016
  • SC 13G/AProto Labs Inc22 Jan 2015
  • SC 13GProto Labs Inc16 Jan 2014

BlackRock, Inc.(3)

  • SC 13G/AProto Labs Inc17 Jul 2025
  • SC 13G/AProto Labs Inc8 Nov 2024
  • SC 13G/AProto Labs Inc18 Oct 2024

FRANKLIN RESOURCES INC(2)

  • SC 13G/AProto Labs Inc10 Feb 2016
  • SC 13GProto Labs Inc9 Feb 2015

DIMENSIONAL FUND ADVISORS LP(2)

  • SC 13G/AProto Labs Inc14 Jul
  • SC 13GProto Labs Inc23 Jan 2025

HARDING LOEVNER LP(2)

  • SC 13G/AProto Labs Inc14 Feb 2022
  • SC 13GProto Labs Inc16 Feb 2021

TimesSquare Capital Management, LLC(2)

  • SC 13G/AProto Labs Inc14 Feb 2018
  • SC 13GProto Labs Inc13 Feb 2017

Sumitomo Mitsui Trust Holdings, Inc.(2)

  • SC 13G/AProto Labs Inc4 Feb 2022
  • SC 13GProto Labs Inc5 Feb 2021

Nikko Asset Management Americas, Inc.(2)

  • SC 13G/AProto Labs Inc14 Feb 2022
  • SC 13GProto Labs Inc11 Feb 2021

NBGE Manager, LLC(2)

  • SC 13G/AProto Labs Inc10 Feb 2014
  • SC 13GProto Labs Inc14 Feb 2013

ARK Investment Management LLC(2)

  • SC 13G/AProto Labs Inc16 Feb 2021
  • SC 13GProto Labs Inc9 Oct 2020

VANGUARD CAPITAL MANAGEMENT LLC(1)

  • SC 13GProto Labs Inc30 Apr

VANGUARD PORTFOLIO MANAGEMENT LLC(1)

  • SC 13GProto Labs Inc29 Apr

Insider Ownership

Gawlick Rainer(40)

  • Form 4Statement of changes in beneficial ownership4 Nov
  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership7 Aug 2025
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021

KRANTZ DONALD G(35)

  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership17 May 2019

Goodman John B(35)

  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership3 Mar 2021
  • Form 4Statement of changes in beneficial ownership26 Aug 2020
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership17 May 2019
  • Form 4Statement of changes in beneficial ownership18 Sep 2018
  • Form 4Statement of changes in beneficial ownership18 Jun 2018
  • Form 4Statement of changes in beneficial ownership18 May 2018
  • Form 4Statement of changes in beneficial ownership16 Mar 2018
  • Form 4Statement of changes in beneficial ownership14 Feb 2018

Bodor Robert(31)

  • Form 4Statement of changes in beneficial ownership27 Feb 2025
  • Form 4Statement of changes in beneficial ownership18 Feb 2025
  • Form 4Statement of changes in beneficial ownership9 Sep 2024
  • Form 4Statement of changes in beneficial ownership15 Feb 2024
  • Form 4Statement of changes in beneficial ownership15 Feb 2023
  • Form 4Statement of changes in beneficial ownership17 Feb 2022
  • Form 4Statement of changes in beneficial ownership6 Dec 2021
  • Form 4Statement of changes in beneficial ownership3 Mar 2021
  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership4 May 2020

Cleveland Bradley A.(29)

  • Form 4Statement of changes in beneficial ownership22 May 2014
  • Form 4Statement of changes in beneficial ownership12 Nov 2013
  • Form 4Statement of changes in beneficial ownership8 Nov 2013
  • Form 4Statement of changes in beneficial ownership6 Nov 2013
  • Form 4Statement of changes in beneficial ownership11 Sep 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)26 Sep 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)26 Sep 2013
  • Form 4Statement of changes in beneficial ownership2 May 2013
  • Form 4Statement of changes in beneficial ownership3 Apr 2013
  • Form 4Statement of changes in beneficial ownership21 Mar 2013

Tumelty John B.(26)

  • Form 4/AStatement of changes in beneficial ownership (amendment)30 Nov 2017
  • Form 4Statement of changes in beneficial ownership27 Nov 2017
  • Form 4/AStatement of changes in beneficial ownership (amendment)30 Nov 2017
  • Form 4Statement of changes in beneficial ownership10 May 2017
  • Form 4Statement of changes in beneficial ownership15 Feb 2017
  • Form 4Statement of changes in beneficial ownership4 Apr 2016
  • Form 4Statement of changes in beneficial ownership19 Feb 2016
  • Form 4Statement of changes in beneficial ownership10 Feb 2016
  • Form 4/AStatement of changes in beneficial ownership (amendment)11 Feb 2016
  • Form 4Statement of changes in beneficial ownership18 Aug 2015

WEHRWEIN SVEN(25)

  • Form 4Statement of changes in beneficial ownership4 Jun
  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership12 Aug 2020

Schneider Jacqueline D.(21)

  • Form 4Statement of changes in beneficial ownership6 Apr 2016
  • Form 4Statement of changes in beneficial ownership19 Feb 2016
  • Form 4/AStatement of changes in beneficial ownership (amendment)11 Feb 2016
  • Form 4Statement of changes in beneficial ownership10 Feb 2016
  • Form 4Statement of changes in beneficial ownership27 Jul 2015
  • Form 4Statement of changes in beneficial ownership17 Apr 2015
  • Form 4Statement of changes in beneficial ownership19 Feb 2015
  • Form 4Statement of changes in beneficial ownership11 Feb 2015
  • Form 4Statement of changes in beneficial ownership1 Jul 2014
  • Form 4Statement of changes in beneficial ownership18 Feb 2014

Schumacher Daniel(20)

  • Form 4Statement of changes in beneficial ownership25 Sep
  • Form 4Statement of changes in beneficial ownership18 Sep
  • Form 4Statement of changes in beneficial ownership22 May
  • Form 4Statement of changes in beneficial ownership27 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership12 Feb
  • Form 4Statement of changes in beneficial ownership4 Feb
  • Form 4Statement of changes in beneficial ownership22 May 2025
  • Form 4Statement of changes in beneficial ownership27 Feb 2025
  • Form 4Statement of changes in beneficial ownership18 Feb 2025

WAY JOHN(19)

  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership10 Aug 2020
  • Form 4Statement of changes in beneficial ownership18 Feb 2020
  • Form 4Statement of changes in beneficial ownership12 Feb 2020
  • Form 4Statement of changes in beneficial ownership3 Dec 2019
  • Form 4Statement of changes in beneficial ownership15 Feb 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019
  • Form 4Statement of changes in beneficial ownership19 Dec 2018
  • Form 4Statement of changes in beneficial ownership26 Sep 2018
  • Form 4Statement of changes in beneficial ownership28 Aug 2018

Baker Arthur R. III(18)

  • Form 4Statement of changes in beneficial ownership17 Feb 2022
  • Form 4Statement of changes in beneficial ownership1 Dec 2021
  • Form 4Statement of changes in beneficial ownership6 May 2021
  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership20 May 2020
  • Form 4Statement of changes in beneficial ownership6 May 2020
  • Form 4Statement of changes in beneficial ownership18 Feb 2020
  • Form 4Statement of changes in beneficial ownership12 Feb 2020
  • Form 4Statement of changes in beneficial ownership7 May 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019

Kenison Michael R.(18)

  • Form 4Statement of changes in beneficial ownership13 May
  • Form 4Statement of changes in beneficial ownership8 May
  • Form 4Statement of changes in beneficial ownership27 Feb
  • Form 4Statement of changes in beneficial ownership18 Feb
  • Form 4Statement of changes in beneficial ownership12 Feb
  • Form 4Statement of changes in beneficial ownership9 Feb
  • Form 4Statement of changes in beneficial ownership4 Feb
  • Form 4Statement of changes in beneficial ownership26 Nov 2025
  • Form 4/AStatement of changes in beneficial ownership (amendment)3 Dec 2025
  • Form 4Statement of changes in beneficial ownership22 May 2025

Smith Brian K(17)

  • Form 4Statement of changes in beneficial ownership23 May 2016
  • Form 4/AStatement of changes in beneficial ownership (amendment)4 Jun 2015
  • Form 4Statement of changes in beneficial ownership22 May 2015
  • Form 4Statement of changes in beneficial ownership24 Mar 2015
  • Form 4Statement of changes in beneficial ownership22 May 2014
  • Form 4Statement of changes in beneficial ownership5 Sep 2013
  • Form 4Statement of changes in beneficial ownership7 Aug 2013
  • Form 4Statement of changes in beneficial ownership28 May 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)31 May 2013
  • Form 4Statement of changes in beneficial ownership7 May 2013

HOLT VICTORIA M(16)

  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership8 Sep 2020
  • Form 4Statement of changes in beneficial ownership11 Mar 2020
  • Form 4Statement of changes in beneficial ownership18 Feb 2020
  • Form 4Statement of changes in beneficial ownership12 Feb 2020
  • Form 4Statement of changes in beneficial ownership15 Feb 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019
  • Form 4Statement of changes in beneficial ownership16 Feb 2018
  • Form 4Statement of changes in beneficial ownership14 Feb 2018
  • Form 4Statement of changes in beneficial ownership15 Feb 2017

Black Archie C.(15)

  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership17 May 2019

Chand Sujeet(13)

  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership17 May 2019

Klaas Bjoern(13)

  • Form 4Statement of changes in beneficial ownership15 Feb 2024
  • Form 4Statement of changes in beneficial ownership15 Feb 2023
  • Form 4Statement of changes in beneficial ownership17 Feb 2022
  • Form 4Statement of changes in beneficial ownership15 Feb 2022
  • Form 4Statement of changes in beneficial ownership18 Feb 2021
  • Form 4Statement of changes in beneficial ownership3 Dec 2020
  • Form 4Statement of changes in beneficial ownership18 Feb 2020
  • Form 4Statement of changes in beneficial ownership12 Feb 2020
  • Form 4Statement of changes in beneficial ownership3 Dec 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019

LUKIS LAWRENCE J(11)

  • Form 5/AAnnual statement of beneficial ownership (amendment)12 Feb 2016
  • Form 5Annual statement of beneficial ownership10 Feb 2016
  • Form 4Statement of changes in beneficial ownership1 Sep 2015
  • Form 4Statement of changes in beneficial ownership5 Aug 2015
  • Form 5Annual statement of beneficial ownership30 Jan 2015
  • Form 4Statement of changes in beneficial ownership20 Feb 2014
  • Form 5Annual statement of beneficial ownership15 Jan 2014
  • Form 4Statement of changes in beneficial ownership7 Aug 2013
  • Form 5Annual statement of beneficial ownership14 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012

LOFTUS MARGARET A(11)

  • Form 4Statement of changes in beneficial ownership17 Mar 2014
  • Form 4Statement of changes in beneficial ownership4 Sep 2013
  • Form 4Statement of changes in beneficial ownership31 May 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)31 May 2013
  • Form 4Statement of changes in beneficial ownership28 May 2013
  • Form 4Statement of changes in beneficial ownership8 Mar 2013
  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 4Statement of changes in beneficial ownership6 Sep 2012
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 4Statement of changes in beneficial ownership27 Feb 2012

Chin Moonhie(11)

  • Form 4Statement of changes in beneficial ownership21 May
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4Statement of changes in beneficial ownership20 May 2021
  • Form 4Statement of changes in beneficial ownership21 May 2020
  • Form 4Statement of changes in beneficial ownership5 Aug 2019

Greiner Stacy(8)

  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 4Statement of changes in beneficial ownership24 May 2024
  • Form 4Statement of changes in beneficial ownership19 May 2023
  • Form 4Statement of changes in beneficial ownership1 Sep 2022
  • Form 4Statement of changes in beneficial ownership20 May 2022
  • Form 4/AFORM 410 Jun 2022
  • Form 4Statement of changes in beneficial ownership22 Nov 2021
  • Form 3Initial statement of beneficial ownership22 Nov 2021

KOHRS DOUGLAS W(7)

  • Form 4Statement of changes in beneficial ownership22 May 2015
  • Form 4/AStatement of changes in beneficial ownership (amendment)4 Jun 2015
  • Form 4Statement of changes in beneficial ownership22 May 2014
  • Form 4Statement of changes in beneficial ownership28 May 2013
  • Form 4/AStatement of changes in beneficial ownership (amendment)31 May 2013
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership4 Apr 2012

JUDD JOHN R(7)

  • Form 4Statement of changes in beneficial ownership1 Aug 2014
  • Form 4Statement of changes in beneficial ownership18 Feb 2014
  • Form 4Statement of changes in beneficial ownership1 Nov 2013
  • Form 4Statement of changes in beneficial ownership5 Aug 2013
  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Bolton Edward E.(7)

  • Form 4Statement of changes in beneficial ownership13 May 2013
  • Form 4Statement of changes in beneficial ownership1 Mar 2013
  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 5Annual statement of beneficial ownership14 Feb 2013
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012
  • Form 4Statement of changes in beneficial ownership27 Feb 2012

Dietrick William M.(7)

  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 4Statement of changes in beneficial ownership17 Jan 2013
  • Form 5Annual statement of beneficial ownership14 Feb 2013
  • Form 4Statement of changes in beneficial ownership29 Nov 2012
  • Form 4Statement of changes in beneficial ownership29 Oct 2012
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

FEIN DAVID M(7)

  • Form 4Statement of changes in beneficial ownership15 Feb 2019
  • Form 4Statement of changes in beneficial ownership13 Feb 2019
  • Form 4Statement of changes in beneficial ownership16 Feb 2018
  • Form 4Statement of changes in beneficial ownership14 Feb 2018
  • Form 4Statement of changes in beneficial ownership15 Feb 2017
  • Form 3Initial statement of beneficial ownership21 Dec 2016
  • Form 4Statement of changes in beneficial ownership21 Dec 2016

Krishna Suresh(6)

  • Form 4Statement of changes in beneficial ownership4 Nov
  • Form 4Statement of changes in beneficial ownership27 May
  • Form 4Statement of changes in beneficial ownership27 Feb
  • Form 4Statement of changes in beneficial ownership6 Aug 2025
  • Form 4Statement of changes in beneficial ownership28 May 2025
  • Form 3Initial statement of beneficial ownership28 May 2025

Kubicek Mark R.(6)

  • Form 4Statement of changes in beneficial ownership4 Oct 2012
  • Form 4Statement of changes in beneficial ownership10 Sep 2012
  • Form 4Statement of changes in beneficial ownership6 Sep 2012
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 4Statement of changes in beneficial ownership27 Feb 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Ryaboy Oleg(6)

  • Form 4Statement of changes in beneficial ownership27 Feb 2025
  • Form 4Statement of changes in beneficial ownership18 Feb 2025
  • Form 4Statement of changes in beneficial ownership15 Feb 2024
  • Form 4Statement of changes in beneficial ownership15 Feb 2023
  • Form 4Statement of changes in beneficial ownership13 Sep 2022
  • Form 3Initial statement of beneficial ownership13 Sep 2022

KINGSLEY DOUGLAS A(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

DAMORE RICHARD A(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

ANDERSON EDWARD T(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

NORTH BRIDGE GROWTH EQUITY I LP(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

NBGE Manager, LLC(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

NBGE GP, LLC(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

North Bridge Growth Management, L.P.(5)

  • Form 4Statement of changes in beneficial ownership25 Feb 2013
  • Form 4Statement of changes in beneficial ownership21 Nov 2012
  • Form 4Statement of changes in beneficial ownership24 Aug 2012
  • Form 4Statement of changes in beneficial ownership1 Mar 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Langton William R.(3)

  • Form 4Statement of changes in beneficial ownership4 Oct 2012
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Pang Thomas H(3)

  • Form 4Statement of changes in beneficial ownership19 Feb 2013
  • Form 4Statement of changes in beneficial ownership9 May 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Blodgett Matthew C(3)

  • Form 4Statement of changes in beneficial ownership11 Jul 2013
  • Form 4Statement of changes in beneficial ownership16 May 2013
  • Form 3Initial statement of beneficial ownership7 Mar 2013

Kermisch Marc(3)

  • Form 4Statement of changes in beneficial ownership27 Feb
  • Form 4Statement of changes in beneficial ownership19 Nov 2025
  • Form 3Initial statement of beneficial ownership15 Oct 2025

Protomold Investment Company, LLC(2)

  • Form 4Statement of changes in beneficial ownership23 Aug 2012
  • Form 3Initial statement of beneficial ownership23 Feb 2012

Parlange Bernardo(2)

  • Form 4Statement of changes in beneficial ownership22 May
  • Form 3Initial statement of beneficial ownership22 May

Ramahi Salam(1)

  • Form 3Initial statement of beneficial ownership10 Sep

≥5% Ownership

VANGUARD GROUP INC(13)

  • SC 13G/AProto Labs Inc27 Mar
  • SC 13G/AProto Labs Inc13 Feb 2024
  • SC 13G/AProto Labs Inc9 Feb 2023
  • SC 13G/AProto Labs Inc9 Mar 2022
  • SC 13G/AProto Labs Inc10 Feb 2022
  • SC 13G/AProto Labs Inc10 Feb 2021
  • SC 13G/AProto Labs Inc12 Feb 2020
  • SC 13G/AProto Labs Inc11 Mar 2019
  • SC 13G/AProto Labs Inc12 Feb 2019
  • SC 13G/AProto Labs Inc12 Feb 2018

BROWN CAPITAL MANAGEMENT LLC(13)

  • SC 13G/AProto Labs Inc14 Feb 2023
  • SC 13G/AProto Labs Inc14 Feb 2022
  • SC 13G/AProto Labs Inc10 Jun 2021
  • SC 13G/AProto Labs Inc12 Feb 2021
  • SC 13G/AProto Labs Inc14 Feb 2020
  • SC 13G/AProto Labs Inc14 Feb 2019
  • SC 13G/AProto Labs Inc14 Feb 2018
  • SC 13G/AProto Labs Inc9 Feb 2017
  • SC 13G/AProto Labs Inc5 Oct 2016
  • SC 13G/AProto Labs Inc5 Feb 2016

DISCIPLINED GROWTH INVESTORS INC /MN(11)

  • SC 13G/AProto Labs Inc14 Aug
  • SC 13G/AProto Labs Inc15 May
  • SC 13G/AProto Labs Inc17 Feb
  • SC 13G/AProto Labs Inc14 Nov 2025
  • SC 13G/AProto Labs Inc14 Aug 2025
  • SC 13G/AProto Labs Inc15 May 2025
  • SC 13G/AProto Labs Inc14 Feb 2025
  • SC 13G/AProto Labs Inc14 Nov 2024
  • SC 13G/AProto Labs Inc14 Feb 2024
  • SC 13G/AProto Labs Inc14 Feb 2023

RIVERBRIDGE PARTNERS LLC(10)

  • SC 13G/AProto Labs Inc21 Jan 2022
  • SC 13G/AProto Labs Inc21 Jan 2022
  • SC 13G/AProto Labs Inc25 Jan 2021
  • SC 13G/AProto Labs Inc5 Feb 2020
  • SC 13G/AProto Labs Inc25 Jan 2019
  • SC 13G/AProto Labs Inc29 Jan 2018
  • SC 13G/AProto Labs Inc24 Jan 2017
  • SC 13G/AProto Labs Inc1 Feb 2016
  • SC 13G/AProto Labs Inc29 Jan 2015
  • SC 13GProto Labs Inc5 Feb 2014

BlackRock Inc.(9)

  • SC 13G/AProto Labs Inc22 Jan 2024
  • SC 13G/AProto Labs Inc23 Jan 2023
  • SC 13G/AProto Labs Inc27 Jan 2022
  • SC 13G/AProto Labs Inc26 Jan 2022
  • SC 13GProto Labs Inc25 Jan 2021
  • SC 13G/AProto Labs Inc4 Feb 2020
  • SC 13G/AProto Labs Inc31 Jan 2019
  • SC 13G/AProto Labs Inc19 Jan 2018
  • SC 13GProto Labs Inc9 Jan 2017

LUKIS LAWRENCE J(6)

  • SC 13G/AProto Labs Inc15 Jan 2019
  • SC 13G/AProto Labs Inc14 Feb 2018
  • SC 13G/AProto Labs Inc16 Feb 2016
  • SC 13G/AProto Labs Inc17 Feb 2015
  • SC 13G/AProto Labs Inc14 Feb 2014
  • SC 13GProto Labs Inc14 Feb 2013

WELLS FARGO & COMPANY/MN(3)

  • SC 13G/AProto Labs Inc10 Jul 2015
  • SC 13G/AProto Labs Inc5 Feb 2015
  • SC 13GProto Labs Inc27 Jan 2014

KORNITZER CAPITAL MANAGEMENT INC /KS(3)

  • SC 13G/AProto Labs Inc22 Jan 2016
  • SC 13G/AProto Labs Inc22 Jan 2015
  • SC 13GProto Labs Inc16 Jan 2014

BlackRock, Inc.(3)

  • SC 13G/AProto Labs Inc17 Jul 2025
  • SC 13G/AProto Labs Inc8 Nov 2024
  • SC 13G/AProto Labs Inc18 Oct 2024

FRANKLIN RESOURCES INC(2)

  • SC 13G/AProto Labs Inc10 Feb 2016
  • SC 13GProto Labs Inc9 Feb 2015

DIMENSIONAL FUND ADVISORS LP(2)

  • SC 13G/AProto Labs Inc14 Jul
  • SC 13GProto Labs Inc23 Jan 2025

HARDING LOEVNER LP(2)

  • SC 13G/AProto Labs Inc14 Feb 2022
  • SC 13GProto Labs Inc16 Feb 2021

TimesSquare Capital Management, LLC(2)

  • SC 13G/AProto Labs Inc14 Feb 2018
  • SC 13GProto Labs Inc13 Feb 2017

Sumitomo Mitsui Trust Holdings, Inc.(2)

  • SC 13G/AProto Labs Inc4 Feb 2022
  • SC 13GProto Labs Inc5 Feb 2021

Nikko Asset Management Americas, Inc.(2)

  • SC 13G/AProto Labs Inc14 Feb 2022
  • SC 13GProto Labs Inc11 Feb 2021

NBGE Manager, LLC(2)

  • SC 13G/AProto Labs Inc10 Feb 2014
  • SC 13GProto Labs Inc14 Feb 2013

ARK Investment Management LLC(2)

  • SC 13G/AProto Labs Inc16 Feb 2021
  • SC 13GProto Labs Inc9 Oct 2020

VANGUARD CAPITAL MANAGEMENT LLC(1)

  • SC 13GProto Labs Inc30 Apr

VANGUARD PORTFOLIO MANAGEMENT LLC(1)

  • SC 13GProto Labs Inc29 Apr