Proto Labs, Inc.
DE ˙ DB ˙ US7437131094
64,05 € ↓ -2,90 (-4,33%)
2026-06-03
DEL PRIS
SecurityDE:PRZ / Proto Labs, Inc.
InstitutionQuantbot Technologies LP
Latest Disclosed Ownership20,782 shares
Latest Disclosed Value $ 1,184,990
Quantbot Technologies LP ownership in PRZ / Proto Labs, Inc.

On May 13, 2026 - Quantbot Technologies LP filed a 13F-HR form disclosing ownership of 20,782 shares of Proto Labs, Inc. (DE:PRZ) valued at $1,018,734 USD as of March 31, 2026. The entity filed a previous 13F-HR on May 6, 2024 disclosing 0 shares of Proto Labs, Inc.. The current value of the position is $1,331,087 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-13 2026-03-31 13F PROTO LABS COM 743713109 20,782 20,782 1,185 0.0485
2024-05-06 2024-03-31 13F PROTO LABS COM 743713109 0 -1,381 -100.00 0 -100.00
2024-02-14 2023-12-31 13F PROTO LABS COM 743713109 1,381 -12,298 -89.90 54 -85.32 0.0031
2023-11-07 2023-09-30 13F PROTO LABS COM 743713109 13,679 8,879 184.98 361 116.17 0.0243
2023-08-08 2023-06-30 13F PROTO LABS COM 743713109 4,800 -8,243 -63.20 168 -61.34 0.0110
2023-05-12 2023-03-31 13F PROTO LABS COM 743713109 13,043 6,652 104.08 432 165.03 0.0306
2023-02-13 2022-12-31 13F PROTO LABS COM 743713109 6,391 -6,539 -50.57 163 -65.39 0.0117
2022-11-07 2022-09-30 13F PROTO LABS COM 743713109 12,930 12,287 1,910.89 471 1,470.00 0.0356
2022-08-09 2022-06-30 13F PROTO LABS COM 743713109 643 643 30 0.0028
2022-05-16 2022-03-31 13F PROTO LABS COM 743713109 0 -26,869 -100.00 0 -100.00
2022-02-11 2021-12-31 13F PROTO LABS COM 743713109 26,869 18,617 225.61 1,379 151.18 0.1118
2021-11-09 2021-09-30 13F PROTO LABS COM 743713109 8,252 8,252 549 0.0402
2021-08-12 2021-06-30 13F PROTO LABS COM 743713109 0 -7,575 -100.00 0 -100.00
2021-05-14 2021-03-31 13F PROTO LABS COM 743713109 7,575 7,575 922 0.0878
2021-02-12 2020-12-31 13F PROTO LABS COM 743713109 0 -1,186 -100.00 0 -100.00
2020-11-16 2020-09-30 13F PROTO LABS COM 743713109 1,186 -141 -10.63 153 2.68 0.0175
2020-08-13 2020-06-30 13F PROTO LABS COM 743713109 1,327 581 77.88 149 166.07 0.0197
2020-05-13 2020-03-31 13F PROTO LABS COM 743713109 746 -3,000 -80.09 56 -85.26 0.0365
2020-02-10 2019-12-31 13F PROTO LABS COM 743713109 3,746 3,305 749.43 380 744.44 0.0377
2019-11-12 2019-09-30 13F PROTO LABS COM 743713109 441 441 45 0.0044
2019-08-13 2019-06-30 13F PROTO LABS COM 743713109 0 -1,000 -100.00 0 -100.00
2019-05-13 2019-03-31 13F PROTO LABS COM 743713109 1,000 100 11.11 105 3.96 0.0100
2019-02-13 2018-12-31 13F PROTO LABS COM 743713109 900 900 101 0.0099
2018-11-13 2018-09-30 13F PROTO LABS COM 743713109 0 -6,589 -100.00 0 -100.00
2018-08-13 2018-06-30 13F PROTO LABS COM 743713109 6,589 6,589 783 0.0533
2016-04-28 2016-03-31 13F PROTO LABS COM 743713109 0 0 0 0.0000
2015-10-22 2015-09-30 13F PROTO LABS COM 743713109 0 -548 -100.00 0 -100.00
2015-07-27 2015-06-30 13F PROTO LABS COM 743713109 548 548 36 0.0065
2015-01-27 2014-12-31 13F PROTO LABS COM 743713109 0 -4,870 -100.00 0 -100.00
2014-10-15 2014-09-30 13F PROTO LABS COM 743713109 4,870 4,870 336 0.0462
2014-07-08 2014-06-30 13F PROTO LABS COM 743713109 0 -2,600 -100.00 0 -100.00
2014-05-21 2014-03-31 13F PROTO LABS COM 743713109 2,600 1,600 160.00 175 146.48 0.0413
2014-01-31 2013-12-31 13F PROTO LABS COM 743713109 1,000 1,000 71 0.0347
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.