Proto Labs, Inc.
US ˙ NYSE ˙ US7437131094

SecurityPRLB / Proto Labs, Inc.
InstitutionDimensional Fund Advisors Lp
Latest Disclosed Ownership1,300,864 shares
Ownership 5.30%
Dimensional Fund Advisors Lp ownership in PRLB / Proto Labs, Inc.

2025-01-23 - Dimensional Fund Advisors Lp has filed an SCHEDULE 13G form with the Securities and Exchange Commission (SEC) disclosing ownership of 1,300,864 shares of Proto Labs, Inc. (US:PRLB). This represents 5.3 percent ownership of the company.

Institutional Ownership: 13D/G Filings

This table shows a history of the 13D/G filings made by the investor and/or investor group. Note that the share values in this table are not directly comparable to any numbers shown in the 13F table (if any).

File
Date		Effective
Date		Form Prev
Shares		 Latest
Shares		 ΔShares
(Percent)		 Ownership
(Percent)		 ΔOwnership
(Percent)
2025-01-23 2025-01-23 13G 1,300,864 5.30

Important Note: One of the primary uses of the 13D/G filings is to evaluate the ability of a firm to control a company (ie, the "beneficial ownership"). To that end, firms are required to report not just direct holdings in companies, but indirect holdings that they control. For investment firms, these indirect holdings can include shares in funds they manage, advisory accounts, and in the case of activist campaigns, pledged votes. Therefore, share counts listed in 13D/G filings can differ significantly than share counts listed in 13F filings.

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)
2026-05-07 2026-03-31 13F PROTO LABS COM 743713109 1,272,356 -4,205 -0.33 72,548 12.33 0.0032
2026-02-12 2025-12-31 13F PROTO LABS COM 743713109 1,276,561 -29,806 -2.28 64,583 -1.18 0.0135
2025-11-12 2025-09-30 13F PROTO LABS COM 743713109 1,306,367 -9,561 -0.73 65,356 24.04 0.0140
2025-08-12 2025-06-30 13F PROTO LABS COM 743713109 1,315,928 -8,876 -0.67 52,691 13.51 0.0122
2025-05-13 2025-03-31 13F PROTO LABS COM 743713109 1,324,804 23,940 1.84 46,421 -8.71 0.0115
2025-02-13 2024-12-31 13F PROTO LABS COM 743713109 1,300,864 68,006 5.52 50,851 40.44 0.0122
2024-11-07 2024-09-30 13F PROTO LABS COM 743713109 1,232,858 122,292 11.01 36,209 5.55 0.0088
2024-08-09 2024-06-30 13F PROTO LABS COM 743713109 1,110,566 130,670 13.34 34,305 -2.08 0.0090
2024-05-10 2024-03-31 13F PROTO LABS COM 743713109 979,896 167,994 20.69 35,031 10.74 0.0095
2024-02-07 2023-12-31 13F PROTO LABS COM 743713109 811,902 34,434 4.43 31,633 54.12 0.0092
2023-11-09 2023-09-30 13F PROTO LABS COM 743713109 777,468 -68,608 -8.11 20,525 -30.61 0.0067
2023-08-09 2023-06-30 13F PROTO LABS COM 743713109 846,076 11,054 1.32 29,579 6.86 0.0094
2023-05-12 2023-03-31 13F PROTO LABS COM 743713109 835,022 44,196 5.59 27,680 138,295.00 0.0093
2023-02-09 2022-12-31 13F PROTO LABS COM 743713109 790,826 64,067 8.82 20 -99.92 0.0060
2022-11-10 2022-09-30 13F PROTO LABS COM 743713109 726,759 99,965 15.95 26,476 -11.70 0.0102
2022-08-12 2022-06-30 13F PROTO LABS COM 743713109 626,794 200,600 47.07 29,983 32.98 0.0108
2022-05-13 2022-03-31 13F PROTO LABS COM 743713109 426,194 108,638 34.21 22,547 38.27 0.0069
2022-02-09 2021-12-31 13F PROTO LABS COM 743713109 317,556 2,210 0.70 16,307 -22.36 0.0049
2021-11-12 2021-09-30 13F PROTO LABS COM 743713109 315,346 -19,879 -5.93 21,004 -31.75 0.0068
2021-08-12 2021-06-30 13F PROTO LABS COM 743713109 335,225 -127,878 -27.61 30,775 -45.42 0.0097
2021-05-14 2021-03-31 13F PROTO LABS COM 743713109 463,103 -8,717 -1.85 56,384 -22.10 0.0186
2021-03-08 2020-12-31 13F/A-2 PROTO LABS COM 743713109 471,820 -4,698 -0.99 72,381 17.28 0.0261
2021-02-11 2020-12-31 13F PROTO LABS COM 743713109 471,820 -4,698 72,381 26,140.1699
2020-11-12 2020-09-30 13F PROTO LABS COM 743713109 476,518 19,634 4.30 61,714 20.09 0.0262
2020-08-13 2020-06-30 13F PROTO LABS COM 743713109 456,884 11,965 2.69 51,388 51.72 0.0226
2020-05-14 2020-03-31 13F PROTO LABS COM 743713109 444,919 -852 -0.19 33,871 -25.18 0.0176
2020-02-14 2019-12-31 13F PROTO LABS COM 743713109 445,771 -3,929 -0.87 45,268 -1.41 0.0165
2019-11-12 2019-09-30 13F PROTO LABS COM 743713109 449,700 -457 -0.10 45,915 -12.08 0.0178
2019-08-13 2019-06-30 13F PROTO LABS COM 743713109 450,157 2,618 0.58 52,225 10.99 0.0203
2019-08-12 2019-03-31 13F/A-2 PROTO LABS COM 743713109 447,539 5,296 1.20 47,055 -5.66 0.0187
2019-05-10 2019-03-31 13F PROTO LABS COM 743713109 447,539 5,296 47,055
2019-02-26 2018-12-31 13F/A-1 PROTO LABS COM 743713109 442,243 10,667 2.47 49,880 -28.54 0.0226
2019-02-13 2018-12-31 13F PROTO LABS COM 743713109 442,243 10,667 49,880
2018-11-13 2018-09-30 13F PROTO LABS COM 743713109 431,576 -4,527 -1.04 69,806 34.57 0.0266
2018-08-10 2018-06-30 13F PROTO LABS COM 743713109 436,103 -7,393 -1.67 51,875 -0.49 0.0207
2018-05-11 2018-03-31 13F PROTO LABS COM 743713109 443,496 -4,096 -0.92 52,133 13.08 0.0217
2018-02-12 2017-12-31 13F PROTO LABS COM 743713109 447,592 8,723 1.99 46,102 30.82 0.0191
2017-11-13 2017-09-30 13F PROTO LABS COM 743713109 438,869 48,172 12.33 35,240 34.12 0.0154
2017-08-11 2017-06-30 13F PROTO LABS COM 743713109 390,697 39,266 11.17 26,274 46.31 0.0121
2017-05-12 2017-03-31 13F PROTO LABS COM 743713109 351,431 44,535 14.51 17,958 13.95 0.0086
2017-02-09 2016-12-31 13F PROTO LABS COM 743713109 306,896 -1,284 -0.42 15,759 -14.65 0.0079
2016-11-10 2016-09-30 13F PROTO LABS COM 743713109 308,180 300 0.10 18,463 4.19 0.0100
2016-08-09 2016-06-30 13F PROTO LABS COM 743713109 307,880 -1,396 -0.45 17,721 -25.68 0.0102
2016-05-13 2016-03-31 13F PROTO LABS COM 743713109 309,276 -8,019 -2.53 23,843 17.98 0.0143
2016-02-10 2015-12-31 13F PROTO LABS COM 743713109 317,295 -4,479 -1.39 20,209 -6.26 0.0126
2015-11-13 2015-09-30 13F PROTO LABS COM 743713109 321,774 0 0.00 21,559 -0.71 0.0142
2015-08-14 2015-06-30 13F PROTO LABS COM 743713109 321,774 45,890 16.63 21,713 12.43 0.0133
2015-05-14 2015-03-31 13F PROTO LABS COM 743713109 275,884 20,243 7.92 19,312 12.48 0.0122
2015-02-06 2014-12-31 13F PROTO LABS COM 743713109 255,641 7,757 3.13 17,169 0.37 0.0113
2014-11-13 2014-09-30 13F PROTO LABS COM 743713109 247,884 9,766 4.10 17,105 -12.31 0.0121
2014-08-08 2014-06-30 13F PROTO LABS COM 743713109 238,118 11,824 5.23 19,506 27.38 0.0136
2014-05-14 2014-03-31 13F PROTO LABS COM 743713109 226,294 38,032 20.20 15,313 14.28 0.0114
2014-02-12 2013-12-31 13F PROTO LABS COM 743713109 188,262 182,881 3,398.64 13,400 3,160.34 0.0104
2013-11-13 2013-09-30 13F PROTO LABS COM 743713109 5,381 0 0.00 411 17.43 0.0004
2013-08-15 2013-06-30 13F PROTO LABS COM 743713109 5,381 5,381 350 0.0003
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.