KRANTZ DONALD G (CIK 1183159) reported 2 SEC Form 4 insider transactions across 1 companies over the past 18 months (most recent 2026-05-21). Recent activity: Buy PRLB (2,210 shares), Buy PRLB (3,939 shares). Source: SEC Form 4.
| Date | Company | Role | Type | Shares | Value |
|---|---|---|---|---|---|
| 2026-05-21 | Proto Labs Inc (PRLB) | Director | Buy | 2,210 | $0 |
| 2025-05-28 | Proto Labs Inc (PRLB) | Director | Buy | 3,939 | $0 |
Source: SEC Form 4 filings · as of 2026-05-21