SCHEDULE 13G/A 0001050442-22-000009 0001050442 XXXXXXXX LIVE 3 Common Stock 09/30/2024 0001443669 Proto Labs Inc 743713109 5540 Pioneer Creek 5540 Pioneer Creek Maple Plain MN 55359 Rule 13d-1(b) DISCIPLINED GROWTH INVESTORS INC /MN MN 1777004.00 279589.00 2056593.00 0.00 2056593.00 8.4 IA Proto Labs Inc 5540 Pioneer Creek, 5540 Pioneer Creek, Maple Plain, MINNESOTA, 55359. Disciplined Growth Investors, Inc 150 South Fifth Street, Suite 2550, Minneapolis, MN 55402 Minnesota Corporation N IA 2,056,593 8.39% 1,777,004 279,589 2,056,593 0 Y Y Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. DISCIPLINED GROWTH INVESTORS INC /MN Peter Rieke 11/14/2024