Quick Takeaways
- DISCIPLINED GROWTH INVESTORS INC /MN filed SCHEDULE 13G/A for Proto Labs Inc Common Stock (PRLB).
- Disclosed ownership: 11%.
- Date of event: 31 Dec 2025.
DISCIPLINED GROWTH INVESTORS INC /MN - 31 Dec 2025 SCHEDULE 13G/A Report for Proto Labs Inc Common Stock (PRLB)
- Filing Manager
- DISCIPLINED GROWTH INVESTORS INC /MN
- Reporting Manager
- DISCIPLINED GROWTH INVESTORS INC /MN
- Security
- Proto Labs Inc Common Stock
- Symbol
- PRLB
- Shares outstanding
- 23,661,319 shares
- Disclosed Ownership
- 2,673,729 shares
- Ownership
- 11%
- Form type
- SCHEDULE 13G/A
- Filing time
- 17 Feb 2026, 16:38:06 UTC
- Date of event
- 31 Dec 2025
- Previous filing
- 14 Nov 2025
- SEC
- View on sec.gov
Quoteable Key Fact
"DISCIPLINED GROWTH INVESTORS INC /MN disclosed 11% ownership in Proto Labs Inc Common Stock (PRLB) on 31 Dec 2025."
What Changed
- Previous schedule filing date: 14 Nov 2025.
- Current filing was accepted on 17 Feb 2026, 16:38.
Why This Matters
- This page explains what this Schedule 13D/13G filing tells you before manager-level rows.
- You can verify ownership claims directly against the original SEC filing.
Source Evidence
Backed by Schedule 13D/13G
See Original Filing
Beneficial ownership values are sourced from the original SEC Schedule 13D/13G filing.
Reporting Managers (1)
| Name | Ownership | Shares Owned | sole voting power | shared voting power | Signature | Title | CIK |
|---|---|---|---|---|---|---|---|
| DISCIPLINED GROWTH INVESTORS INC /MN | 11% | 2,673,729 | 2,398,250 | 0 | Peter G. Rieke | Chief Operating & Compliance Officer |