原型實驗室公司
AT ˙ WBAG ˙ US7437131094
€64.80 ↓ -1.15 (-1.74%)
2026-06-04
分享價格
SecurityAT:PRLB / Proto Labs, Inc.
InstitutionRenaissance Technologies Llc
ManagerJames Simons
Latest Disclosed Ownership520,251 shares
Latest Disclosed Value $ 29,664,712
Renaissance Technologies Llc reports 5.41% increase in ownership of PRLB / Proto Labs, Inc.

On May 14, 2026 - Renaissance Technologies Llc filed a 13F-HR form disclosing ownership of 520,251 shares of Proto Labs, Inc. (AT:PRLB) valued at $25,211,363 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 12, 2026 disclosing 493,551 shares of Proto Labs, Inc.. This represents a change in shares of 5.41% during the quarter. The current value of the position is $33,712,265 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)
2026-05-14 2026-03-31 13F PROTO LABS COM 743713109 520,251 26,700 5.41 29,665 18.81 0.0464
2026-02-12 2025-12-31 13F PROTO LABS COM 743713109 493,551 -50,100 -9.22 24,969 -8.20 0.0387
2025-11-13 2025-09-30 13F PROTO LABS COM 743713109 543,651 1,600 0.30 27,199 25.32 0.0359
2025-08-13 2025-06-30 13F PROTO LABS COM 743713109 542,051 10,400 1.96 21,704 16.50 0.0289
2025-05-14 2025-03-31 13F PROTO LABS COM 743713109 531,651 -40,200 -7.03 18,629 -16.66 0.0282
2025-02-13 2024-12-31 13F PROTO LABS COM 743713109 571,851 15,000 2.69 22,354 36.68 0.0331
2024-11-13 2024-09-30 13F PROTO LABS COM 743713109 556,851 121,028 27.77 16,355 21.48 0.0246
2024-08-09 2024-06-30 13F PROTO LABS COM 743713109 435,823 106,423 32.31 13,463 122,281.82 0.0228
2024-05-13 2024-03-31 13F PROTO LABS COM 743713109 329,400 39,800 13.74 12 0.00 0.0185
2024-02-13 2023-12-31 13F PROTO LABS COM 743713109 289,600 13,500 4.89 11 57.14 0.0175
2023-11-14 2023-09-30 13F PROTO LABS COM 743713109 276,100 74,184 36.74 7 0.00 0.0124
2023-08-11 2023-06-30 13F PROTO LABS COM 743713109 201,916 51,416 34.16 7 75.00 0.0102
2023-05-12 2023-03-31 13F PROTO LABS COM 743713109 150,500 25,800 20.69 5 33.33 0.0066
2023-02-13 2022-12-31 13F PROTO LABS COM 743713109 124,700 -13,700 -9.90 3 -99.94 0.0044
2022-11-14 2022-09-30 13F PROTO LABS COM 743713109 138,400 91,200 193.22 5,042 123.29 0.0071
2022-08-12 2022-06-30 13F PROTO LABS COM 743713109 47,200 43,300 1,110.26 2,258 996.12 0.0027
2022-05-13 2022-03-31 13F PROTO LABS COM 743713109 3,900 -198,400 -98.07 206 -98.02 0.0002
2022-02-11 2021-12-31 13F PROTO LABS COM 743713109 202,300 70,000 52.91 10,388 17.90 0.0129
2021-11-12 2021-09-30 13F PROTO LABS COM 743713109 132,300 -29,083 -18.02 8,811 -40.53 0.0114
2021-08-13 2021-06-30 13F PROTO LABS COM 743713109 161,383 102,686 174.94 14,815 107.32 0.0185
2021-05-13 2021-03-31 13F PROTO LABS COM 743713109 58,697 58,697 -63.63 7,146 -51.77 0.0089
2020-05-14 2020-03-31 13F PROTO LABS COM 743713109 0 -9,300 -100.00 0 -100.00
2020-02-13 2019-12-31 13F PROTO LABS COM 743713109 9,300 -6,400 -40.76 944 -41.11 0.0007
2019-11-13 2019-09-30 13F PROTO LABS COM 743713109 15,700 15,700 68.82 1,603 69.81 0.0014
2019-08-12 2019-06-30 13F PROTO LABS COM 743713109 0 -48,800 -100.00 0 -100.00
2019-05-14 2019-03-31 13F PROTO LABS COM 743713109 48,800 -23,300 -32.32 5,131 -36.90 0.0047
2019-02-12 2018-12-31 13F PROTO LABS COM 743713109 72,100 72,100 8,132 0.0089
2016-08-12 2016-06-30 13F PROTO LABS COM 743713109 0 -3,300 -100.00 0 -100.00
2016-05-13 2016-03-31 13F PROTO LABS COM 743713109 3,300 -2,600 -44.07 254 -32.45 0.0005
2016-02-11 2015-12-31 13F PROTO LABS COM 743713109 5,900 -71,600 -92.39 376 -92.76 0.0008
2015-11-12 2015-09-30 13F PROTO LABS COM 743713109 77,500 77,500 5,193 0.0124
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.