Proto Labs, Inc.
US ˙ NYSE ˙ US7437131094

SecurityPRLB / Proto Labs, Inc.
InstitutionFifth Third Bancorp
Latest Disclosed Ownership5,129 shares
Latest Disclosed Value $ 292,455
Fifth Third Bancorp reports 3,537.59% increase in ownership of PRLB / Proto Labs, Inc.

On May 1, 2026 - Fifth Third Bancorp filed a 13F-HR form disclosing ownership of 5,129 shares of Proto Labs, Inc. (US:PRLB) valued at $292,456 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 2, 2026 disclosing 141 shares of Proto Labs, Inc.. This represents a change in shares of 3,537.59% during the quarter. The current value of the position is $382,982 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.

Upgrade to unlock premium data and export to Excel .

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)
2026-05-01 2026-03-31 13F PROTO LABS COM 743713109 5,129 4,988 3,537.59 292 4,071.43 0.0005
2026-02-02 2025-12-31 13F PROTO LABS COM 743713109 141 13 10.16 7 16.67 0.0000
2025-11-07 2025-09-30 13F PROTO LABS COM 743713109 128 11 9.40 6 50.00 0.0000
2025-07-15 2025-06-30 13F PROTO LABS COM 743713109 117 -105 -47.30 5 -42.86 0.0000
2025-04-15 2025-03-31 13F PROTO LABS COM 743713109 222 52 30.59 8 16.67 0.0000
2025-01-21 2024-12-31 13F PROTO LABS COM 743713109 170 -101 -37.27 7 -14.29 0.0000
2024-10-17 2024-09-30 13F PROTO LABS COM 743713109 271 -201 -42.58 8 -50.00 0.0000
2024-07-22 2024-06-30 13F PROTO LABS COM 743713109 472 6 1.29 15 -12.50 0.0001
2024-04-23 2024-03-31 13F PROTO LABS COM 743713109 466 0 0.00 17 -11.11 0.0001
2024-01-19 2023-12-31 13F PROTO LABS COM 743713109 466 -1 -0.21 18 50.00 0.0001
2023-10-31 2023-09-30 13F PROTO LABS COM 743713109 467 16 3.55 12 -20.00 0.0001
2023-07-26 2023-06-30 13F PROTO LABS COM 743713109 451 -4 -0.88 16 0.00 0.0001
2023-04-24 2023-03-31 13F PROTO LABS COM 743713109 455 -69 -13.17 15 15.38 0.0001
2023-01-25 2022-12-31 13F PROTO LABS COM 743713109 524 170 48.02 13 0.00 0.0001
2022-10-25 2022-09-30 13F PROTO LABS COM 743713109 354 35 10.97 13 -13.33 0.0001
2022-08-04 2022-06-30 13F PROTO LABS COM 743713109 319 -627 -66.28 15 -70.00 0.0001
2022-04-19 2022-03-31 13F PROTO LABS COM 743713109 946 35 3.84 50 6.38 0.0002
2022-02-01 2021-12-31 13F PROTO LABS COM 743713109 911 -48 -5.01 47 -26.56 0.0002
2021-10-15 2021-09-30 13F PROTO LABS COM 743713109 959 6 0.63 64 -26.44 0.0003
2021-08-06 2021-06-30 13F PROTO LABS COM 743713109 953 82 9.41 87 -17.92 0.0004
2021-05-07 2021-03-31 13F PROTO LABS COM 743713109 871 -394 -31.15 106 -45.36 0.0005
2021-02-16 2020-12-31 13F PROTO LABS COM 743713109 1,265 -153 -10.79 194 5.43 0.0010
2020-11-09 2020-09-30 13F PROTO LABS COM 743713109 1,418 -114 -7.44 184 6.98 0.0010
2020-08-05 2020-06-30 13F PROTO LABS COM 743713109 1,532 -26 -1.67 172 44.54 0.0010
2020-05-05 2020-03-31 13F PROTO LABS COM 743713109 1,558 350 28.97 119 -3.25 0.0008
2020-02-14 2019-12-31 13F PROTO LABS COM 743713109 1,208 142 13.32 123 12.84 0.0007
2019-11-14 2019-09-30 13F PROTO LABS COM 743713109 1,066 -373 -25.92 109 -34.73 0.0007
2019-08-07 2019-06-30 13F PROTO LABS COM 743713109 1,439 13 0.91 167 11.33 0.0010
2019-05-14 2019-03-31 13F PROTO LABS COM 743713109 1,426 37 2.66 150 -4.46 0.0010
2019-02-14 2018-12-31 13F PROTO LABS COM 743713109 1,389 0 0.00 157 -30.22 0.0011
2018-11-14 2018-09-30 13F PROTO LABS COM 743713109 1,389 0 0.00 225 36.36 0.0014
2018-08-14 2018-06-30 13F PROTO LABS COM 743713109 1,389 -29 -2.05 165 -1.20 0.0011
2018-05-15 2018-03-31 13F PROTO LABS COM 743713109 1,418 0 0.00 167 14.38 0.0011
2018-02-14 2017-12-31 13F PROTO LABS COM 743713109 1,418 -23 -1.60 146 25.86 0.0010
2017-11-14 2017-09-30 13F PROTO LABS COM 743713109 1,441 0 0.00 116 19.59 0.0008
2017-08-11 2017-06-30 13F PROTO LABS COM 743713109 1,441 0 0.00 97 31.08 0.0007
2017-05-12 2017-03-31 13F PROTO LABS COM 743713109 1,441 0 0.00 74 0.00 0.0006
2017-02-13 2016-12-31 13F/A-1 PROTO LABS COM 743713109 1,441 384 36.33 74 17.46 0.0006
2017-02-09 2016-12-31 13F PROTO LABS COM 743713109 1,057 0 63 0.0005
2016-11-10 2016-09-30 13F PROTO LABS COM 743713109 1,057 0 0.00 63 3.28 0.0005
2016-08-11 2016-06-30 13F PROTO LABS COM 743713109 1,057 0 0.00 61 -24.69 0.0005
2016-05-13 2016-03-31 13F PROTO LABS COM 743713109 1,057 0 0.00 81 20.90 0.0007
2016-02-16 2015-12-31 13F PROTO LABS COM 743713109 1,057 -9 -0.84 67 -5.63 0.0006
2015-11-13 2015-09-30 13F PROTO LABS COM 743713109 1,066 146 15.87 71 14.52 0.0007
2015-08-14 2015-06-30 13F PROTO LABS COM 743713109 920 -406 -30.62 62 -33.33 0.0005
2015-05-14 2015-03-31 13F PROTO LABS COM 743713109 1,326 -181 -12.01 93 -7.92 0.0008
2015-02-13 2014-12-31 13F PROTO LABS COM 743713109 1,507 -150 -9.05 101 -11.40 0.0009
2014-11-17 2014-09-30 13F PROTO LABS COM 743713109 1,657 -41 -2.41 114 -17.99 0.0010
2014-08-14 2014-06-30 13F PROTO LABS COM 743713109 1,698 -3,578 -67.82 139 -61.06 0.0013
2014-05-15 2014-03-31 13F PROTO LABS COM 743713109 5,276 3,371 176.96 357 162.50 0.0034
2014-02-14 2013-12-31 13F PROTO LABS COM 743713109 1,905 -692 -26.65 136 -31.31 0.0013
2013-11-14 2013-09-30 13F PROTO LABS COM 743713109 2,597 -3,921 -60.16 198 -53.19 0.0020
2013-08-14 2013-06-30 13F PROTO LABS COM 743713109 6,518 6,518 423 0.0045
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.