Proto Labs (PRLB) Held by Superinvestors
PROTO LABS INC (PRLB) is currently held by 4 superinvestors tracked by InsiderSet, with a combined reported market value of approximately $238.03M based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Disciplined Growth Investors is currently the largest disclosed institutional shareholder of PRLB tracked by InsiderSet, reporting ownership valued at approximately $194.04M in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $203.80M, representing an estimated gain of +5.03% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 100% of the total disclosed PRLB value among the investors covered in this analysis. Major shareholders include Disciplined Growth Investors, Renaissance Technologies LLC, ARK Invest, and several other long-term asset managers with concentrated positions in PROTO LABS INC (PRLB).
This page ranks the largest institutional PRLB shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Disciplined Growth Investors | Fred Martin | 3.29% | 2,380,514 | $194,035,737 | $203,795,804 | +$9,760,067 | +5.03% |
| Renaissance Technologies LLC | Jim Simons | 0.05% | 469,251 | $38,248,649 | $40,172,578 | +$1,923,929 | +5.03% |
| ARK Invest | Cathie Wood | 0.02% | 35,418 | $2,886,921 | $3,032,135 | +$145,214 | +5.03% |
| Polen Capital Management | David M. Polen | 0.02% | 35,011 | $2,853,747 | $2,997,292 | +$143,545 | +5.03% |
Frequently asked questions about PRLB
Who are the largest superinvestors holding PRLB?
The largest superinvestors holding PRLB in the latest SEC Form 13F filings include Disciplined Growth Investors, Renaissance Technologies LLC, ARK Invest, and Polen Capital Management. InsiderSet ranks these superinvestors by their latest reported PRLB position.
What does the PRLB superinvestors page include?
This page tracks PRLB positions reported by a curated group of notable institutional investors and fund managers through SEC Form 13F. PROTO LABS INC (PRLB) on this page reflects disclosed 13F holdings among those superinvestors, not every institutional shareholder of the stock.
How many superinvestors hold PRLB?
InsiderSet currently tracks 4 superinvestors reporting PRLB holdings in the latest available 13F data. This is the curated set on this page, not the total number of institutions that own PRLB.
How much PRLB stock do superinvestors hold?
Superinvestors tracked by InsiderSet disclosed approximately $238.03M in PRLB holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value, and it covers the curated superinvestors on this page rather than every institutional filer.
When were PRLB superinvestor holdings last updated?
The latest PRLB superinvestor holdings on InsiderSet are based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time holdings.
Are superinvestor PRLB holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by these superinvestors as of the end of the reporting quarter. A superinvestor may have changed its PRLB position after the reporting date.
Are superinvestors buying or selling PRLB?
Buying and selling can be analyzed by comparing PRLB positions across consecutive 13F reporting periods. InsiderSet's PRLB Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View PRLB ownership changes.
How have superinvestor PRLB holdings changed over time?
InsiderSet tracks PRLB holdings among these superinvestors across multiple 13F reporting periods, so holder counts, reported value, and reported shares can be compared over time.