Proto Labs Inc. 13F holders
None of the 44 funds followed here reported a position in Proto Labs Inc. in its latest 13F.
Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 14 August 2026 | 13G/A | Disciplined Growth Investors Inc /Mn and 1 other | 2.4 million | 10.0% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 14 July 2026 | 13G/A | Dimensional Fund Advisors LP and 1 other | 1.2 million | 4.8% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 15 May 2026 | 13G/A | Disciplined Growth Investors Inc /Mn and 1 other | 2.5 million | 10.5% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 30 April 2026 | 13G | Vanguard Capital Management and 1 other | 1.2 million | 5.1% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 April 2026 | 13G | Vanguard Portfolio Management and 1 other | 1.5 million | 6.5% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 27 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 17 February 2026 | 13G/A | Disciplined Growth Investors Inc /Mn and 1 other | 2.7 million | 11.3% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 14 November 2025 | 13G/A | Disciplined Growth Investors Inc /Mn and 1 other | 2.6 million | 10.9% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short.Fails to deliver
No share in Proto Labs Inc. failed to deliver at settlement on any day in the SEC's last three half-month files.
Source
Each fund's 13F-HR on EDGAR, linked per row; positions matched to PRLB by CUSIP from the SEC's own fails-to-deliver files; Schedule 13D and 13G from the company's own filing index, each read to confirm the company is the issuer named.
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