Proto Labs Inc SEC filings PRLB
Proto Labs Inc has 901 filings in SEC EDGAR's recent list, going back to Aug 18, 2008. Its latest annual report, Form ARS, was filed on Apr 8, 2026 for the period ended Dec 31, 2025. The latest quarterly report (Form 10-Q) was filed on Oct 29, 2026, covering the quarter ended Sep 30, 2026. The most recent current report (Form 8-K) was filed on Oct 29, 2026 (results of operations). The company's fiscal year ends on December 31.
| Form | Description | Filed | Period |
|---|---|---|---|
| 4 | Insider transaction | Nov 4, 2026 | Nov 2, 2026 |
| 4 | Insider transaction | Nov 4, 2026 | Nov 3, 2026 |
| 144 | Notice of proposed sale | Sep 25, 2026 | — |
| 4 | Insider transaction | Sep 25, 2026 | Sep 24, 2026 |
| 144 | Notice of proposed sale | Sep 24, 2026 | — |
| 144 | Notice of proposed sale | Sep 24, 2026 | — |
| 4 | Insider transaction | Sep 18, 2026 | Sep 16, 2026 |
| 144 | Notice of proposed sale | Sep 17, 2026 | — |
| 144 | Notice of proposed sale | Sep 16, 2026 | — |
| 3 | Initial insider ownership | Sep 10, 2026 | Aug 31, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2026 | — |
| 144 | Notice of proposed sale | Aug 4, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 14, 2026 | — |
| 4 | Insider transaction | Jun 4, 2026 | Jun 2, 2026 |
| 144 | Notice of proposed sale | Jun 1, 2026 | — |
| 4 | Insider transaction | May 27, 2026 | May 23, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 4 | Insider transaction | May 22, 2026 | May 20, 2026 |
| 3 | Initial insider ownership | May 22, 2026 | May 18, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| 4 | Insider transaction | May 21, 2026 | May 19, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2026 | — |
| 4 | Insider transaction | May 13, 2026 | May 11, 2026 |
| 144 | Notice of proposed sale | May 12, 2026 | — |
| 144 | Notice of proposed sale | May 11, 2026 | — |
| 4 | Insider transaction | May 8, 2026 | May 7, 2026 |
| 144 | Notice of proposed sale | May 7, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 30, 2026 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Apr 29, 2026 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Mar 27, 2026 | — |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 27, 2026 | Feb 25, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 13, 2026 |
| 4 | Insider transaction | Feb 18, 2026 | Feb 13, 2026 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 17, 2026 | — |
| 4 | Insider transaction | Feb 12, 2026 | Feb 10, 2026 |
| 4 | Insider transaction | Feb 12, 2026 | Feb 10, 2026 |
| 4 | Insider transaction | Feb 9, 2026 | Feb 6, 2026 |
| 144 | Notice of proposed sale | Feb 6, 2026 | — |
| 4 | Insider transaction | Feb 4, 2026 | Jan 29, 2026 |
| 4 | Insider transaction | Feb 4, 2026 | Jan 29, 2026 |
| 144 | Notice of proposed sale | Jan 16, 2026 | — |
| 144 | Notice of proposed sale | Jan 15, 2026 | — |
| 144 | Notice of proposed sale | Jan 8, 2026 | — |
| 144 | Notice of proposed sale | Jan 7, 2026 | — |
| 4/A | Form 4/a | Dec 3, 2025 | Nov 25, 2025 |
| 4 | Insider transaction | Nov 26, 2025 | Nov 25, 2025 |
| 144 | Notice of proposed sale | Nov 25, 2025 | — |
| 144 | Notice of proposed sale | Nov 25, 2025 | — |
| 4 | Insider transaction | Nov 19, 2025 | Nov 17, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2025 | — |
| 144 | Notice of proposed sale | Nov 7, 2025 | — |
| 3 | Initial insider ownership | Oct 15, 2025 | Oct 13, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Aug 14, 2025 | — |
| 4 | Insider transaction | Aug 7, 2025 | Aug 5, 2025 |
| 4 | Insider transaction | Aug 6, 2025 | Aug 4, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Jul 17, 2025 | — |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 4 | Insider transaction | May 28, 2025 | May 23, 2025 |
| 3 | Initial insider ownership | May 28, 2025 | May 20, 2025 |
| 4 | Insider transaction | May 22, 2025 | May 20, 2025 |
| 4 | Insider transaction | May 22, 2025 | May 20, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | May 15, 2025 | — |
| 4 | Insider transaction | Feb 27, 2025 | Feb 25, 2025 |
| 4 | Insider transaction | Feb 27, 2025 | Feb 25, 2025 |
| 4 | Insider transaction | Feb 27, 2025 | Feb 25, 2025 |
| 4 | Insider transaction | Feb 27, 2025 | Feb 25, 2025 |
| 4 | Insider transaction | Feb 18, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 18, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 18, 2025 | Feb 13, 2025 |
| 4 | Insider transaction | Feb 18, 2025 | Feb 13, 2025 |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Feb 14, 2025 | — |
| SCHEDULE 13G | Ownership over 5% (passive) | Jan 23, 2025 | — |
| SCHEDULE 13G/A | Amended ownership over 5% (passive) | Nov 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Nov 8, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Oct 18, 2024 | — |
| 4 | Insider transaction | Sep 9, 2024 | Sep 6, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 24, 2024 | May 23, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 4 | Insider transaction | May 22, 2024 | May 20, 2024 |
| 4 | Insider transaction | Feb 15, 2024 | Feb 13, 2024 |
| 4 | Insider transaction | Feb 15, 2024 | Feb 13, 2024 |
| 4 | Insider transaction | Feb 15, 2024 | Feb 13, 2024 |
| 4 | Insider transaction | Feb 15, 2024 | Feb 13, 2024 |
| 4 | Insider transaction | Feb 15, 2024 | Feb 13, 2024 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 13, 2024 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 22, 2024 | — |
| 4 | Insider transaction | May 23, 2023 | May 20, 2023 |
| 4 | Insider transaction | May 19, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 19, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 19, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 19, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 19, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 19, 2023 | May 17, 2023 |
| 4 | Insider transaction | May 19, 2023 | May 17, 2023 |
| 4 | Insider transaction | Feb 15, 2023 | Feb 13, 2023 |
| 4 | Insider transaction | Feb 15, 2023 | Feb 13, 2023 |
| 4 | Insider transaction | Feb 15, 2023 | Feb 13, 2023 |
| 4 | Insider transaction | Feb 15, 2023 | Feb 13, 2023 |
| 4 | Insider transaction | Feb 15, 2023 | Feb 13, 2023 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 9, 2023 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 23, 2023 | — |
| 4 | Insider transaction | Dec 5, 2022 | Dec 1, 2022 |
| 4 | Insider transaction | Sep 13, 2022 | Sep 9, 2022 |
| 3 | Initial insider ownership | Sep 13, 2022 | Sep 9, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Aug 30, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Aug 30, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Aug 30, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Aug 30, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Aug 30, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Aug 30, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | May 23, 2022 |
| 4 | Insider transaction | Sep 1, 2022 | Aug 30, 2022 |
| 4/A | Form 4 | Jun 10, 2022 | May 18, 2022 |
| 4/A | Form 4 | Jun 10, 2022 | May 18, 2022 |
| 4/A | Form 4 | Jun 10, 2022 | May 18, 2022 |
| 4/A | Form 4 | Jun 10, 2022 | May 18, 2022 |
| 4/A | Form 4 | Jun 10, 2022 | May 18, 2022 |
| 4/A | Form 4 | Jun 10, 2022 | May 18, 2022 |
| 4/A | Form 4 | Jun 10, 2022 | May 18, 2022 |
| 4/A | Form 4 | Jun 10, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 25, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 25, 2022 | May 23, 2022 |
| 4 | Insider transaction | May 20, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 20, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 20, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 20, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 20, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 20, 2022 | May 18, 2022 |
| 4 | Insider transaction | May 20, 2022 | May 18, 2022 |
| SC 13G/A | Amended ownership over 5% (passive) | Mar 9, 2022 | — |
| 4 | Insider transaction | Feb 17, 2022 | Feb 15, 2022 |
| 4 | Insider transaction | Feb 17, 2022 | Feb 15, 2022 |
| 4 | Insider transaction | Feb 17, 2022 | Feb 15, 2022 |
| 4 | Insider transaction | Feb 17, 2022 | Feb 15, 2022 |
| 4 | Insider transaction | Feb 15, 2022 | Feb 13, 2022 |
| SC 13G | Ownership over 5% (passive) | Feb 15, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 14, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 4, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 27, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 26, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 21, 2022 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 21, 2022 | — |
| 4 | Insider transaction | Dec 6, 2021 | Dec 3, 2021 |
| 4 | Insider transaction | Dec 3, 2021 | Dec 1, 2021 |
| 3 | Initial insider ownership | Dec 3, 2021 | Dec 1, 2021 |
| 4 | Insider transaction | Dec 1, 2021 | Dec 1, 2021 |
| 4 | Insider transaction | Nov 22, 2021 | Nov 15, 2021 |
| 3 | Initial insider ownership | Nov 22, 2021 | Nov 15, 2021 |
| 3 | Initial insider ownership | Jun 30, 2021 | Jun 28, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Jun 10, 2021 | — |
| 4 | Insider transaction | May 20, 2021 | May 18, 2021 |
| 4 | Insider transaction | May 20, 2021 | May 18, 2021 |
| 4 | Insider transaction | May 20, 2021 | May 18, 2021 |
| 4 | Insider transaction | May 20, 2021 | May 18, 2021 |
| 4 | Insider transaction | May 20, 2021 | May 18, 2021 |
| 4 | Insider transaction | May 20, 2021 | May 18, 2021 |
| 4 | Insider transaction | May 20, 2021 | May 18, 2021 |
| 4 | Insider transaction | May 6, 2021 | May 4, 2021 |
| 4 | Insider transaction | Mar 3, 2021 | Mar 1, 2021 |
| 4 | Insider transaction | Mar 3, 2021 | Mar 1, 2021 |
| 4 | Insider transaction | Feb 18, 2021 | Feb 16, 2021 |
| 4 | Insider transaction | Feb 18, 2021 | Feb 16, 2021 |
| 4 | Insider transaction | Feb 18, 2021 | Feb 16, 2021 |
| 4 | Insider transaction | Feb 18, 2021 | Feb 16, 2021 |
| 4 | Insider transaction | Feb 18, 2021 | Feb 16, 2021 |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 16, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 12, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 11, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Feb 10, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Feb 5, 2021 | — |
| SC 13G | Ownership over 5% (passive) | Jan 25, 2021 | — |
| SC 13G/A | Amended ownership over 5% (passive) | Jan 25, 2021 | — |
| 4 | Insider transaction | Dec 22, 2020 | Dec 18, 2020 |
| 4 | Insider transaction | Dec 3, 2020 | Dec 1, 2020 |
Showing 200 filings, the most recent 200. Main filings leave out insider and ownership forms such as Form 4; choose a type above to see them. Each form opens on SEC.gov. Older filings are on SEC EDGAR.
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Company profile
- Industry
- Fabricated Structural Metal Products (SIC 3440)
- Listed as
- PRLB (NYSE)
- Fiscal year ends
- December 31
- Incorporated in
- MN
- Headquarters
- Maple Plain, MN
- SEC filer status
- Large accelerated filer
- SEC CIK
- 1443669
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Source: SEC EDGAR filings. This is company-reported data, not investment advice.