Form 8-K

8-K — Proto Labs Inc

Accession: 0001443669-26-000043

Filed: 2026-10-29

Period: 2026-10-29

CIK: 0001443669

SIC: 3440 (FABRICATED STRUCTURAL METAL PRODUCTS)

Item: Results of Operations and Financial Condition

Item: Financial Statements and Exhibits

Documents

8-K — prlb-20261029.htm (Primary)

EX-99.1 (prlb-20261029xexx991.htm)

GRAPHIC (logo.jpg)

XML — IDEA: XBRL DOCUMENT (R1.htm)

8-K

8-K (Primary)

Filename: prlb-20261029.htm · Sequence: 1

prlb-20261029

0001443669FALSE00014436692026-10-292026-10-29

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF

THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): October 29, 2026

Proto Labs, Inc.

(Exact name of registrant as specified in its charter)

Minnesota 001-35435 41-1939628

(State or other jurisdiction

of incorporation) (Commission File Number) (IRS Employer

Identification Number)

5540 Pioneer Creek Drive

Maple Plain, Minnesota

55359

(Address of principal executive offices) (Zip Code)

Registrant’s telephone number, including area code:

(763) 479-3680

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class Trading Symbol(s) Name of each exchange on which registered

Common Stock, Par Value $0.001 Per Share PRLB New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition.

On October 29, 2026, Proto Labs, Inc. issued a press release announcing its third quarter 2026 financial results. A copy of the press release is furnished as Exhibit 99.1 to this report and incorporated herein by reference.

Item 9.01. Financial Statements and Exhibits.

(d)Exhibits

99.1

Press release of Proto Labs, Inc. dated October 29, 2026

104 Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Proto Labs, Inc.

Date:

October 29, 2026

By: /s/ Daniel Schumacher

Daniel Schumacher

Chief Financial Officer

EX-99.1

Filename: prlb-20261029xexx991.htm · Sequence: 2

Document

Exhibit 99.1

Protolabs Reports Financial Results for the Third Quarter of 2026

Record Quarterly Revenue of $154.3 Million, a 14.0% Increase Year-Over-Year

GAAP Earnings Per Share of $0.48, up 61% YoY; Non-GAAP Earnings Per Share of $0.63, up 33% YoY

Raising Full Year 2026 Revenue Growth Guidance from 8% - 10% to 10% - 11%

MINNEAPOLIS – October 29, 2026 – Proto Labs, Inc. ("Protolabs" or the "Company") (NYSE: PRLB), the world’s leading provider of digital manufacturing services, today announced financial results for the third quarter ended September 30, 2026.

Third Quarter 2026 Financial Highlights:

•Revenue was a record $154.3 million, a 14.0% increase over the third quarter of 2025.

◦Total revenue per customer contact increased 16.6% year-over-year.

◦CNC machining revenue grew 16.4% year-over-year.

◦Injection molding revenue grew 12.5% year-over-year.

◦3D printing revenue grew 11.4% year-over-year.

•GAAP operating margin was 9.4%, up from 6.5% in the third quarter of 2025. Non-GAAP operating margin was 11.9%, up from 10.0% in the third quarter of 2025.

•GAAP net income was $0.48 per diluted share, compared to $0.30 per diluted share in the third quarter of 2025. Non-GAAP net income was $0.63 per diluted share, compared to $0.47 per diluted share in the third quarter of 2025.

Note: See “Non-GAAP Financial Measures” below.

"Protolabs delivered another record quarter, with double-digit revenue growth for the fourth consecutive quarter," said Suresh Krishna, President and Chief Executive Officer. "Our momentum reflects strong execution and growing demand from industries that value speed, quality, and manufacturing agility. As reindustrialization, advanced hardware innovation, and the need for resilient supply chains reshape manufacturing, our digital model enables customers to move quickly from idea to production — positioning us to deliver sustained profitable growth and long-term shareholder value."

Additional Third Quarter 2026 Financial Highlights:

•GAAP net income was $11.8 million, or 7.6% of revenue, up 63.0% compared to $7.2 million, or 5.3% of revenue in the third quarter of 2025.

•Adjusted EBITDA was $26.2 million, or 17.0% of revenue, up 23.8% compared to $21.1 million, or 15.6% of revenue, in the third quarter of 2025. See “Non-GAAP Financial Measures” below.

•Cash generated from operations was $22.8 million.

•Cash and investments balance was $175.0 million as of September 30, 2026.

"We delivered another quarter of strong financial performance, with broad-based revenue growth, meaningful operating leverage, and continued earnings growth," said Dan Schumacher, Chief Financial Officer. "We remain focused on balancing investments in our strategic priorities with disciplined cost management, while generating strong cash flow and positioning the business for sustained profitable growth."

Financial Guidance and Outlook:

•For full year 2026, Protolabs is raising its guidance and now expects revenue growth between 10% and 11%.

•For the fourth quarter of 2026, the Company expects revenue between $143.0 million and $151.0 million.

•For the fourth quarter of 2026, the Company expects GAAP diluted net income per share between $0.28 and $0.36, and non-GAAP diluted net income per share between $0.46 and $0.54. See "Non-GAAP Financial Measures" below.

Non-GAAP Financial Measures

The Company has included non-GAAP revenue growth by region and by product line that excludes the impact of changes in foreign currency exchange rates (collectively, “non-GAAP revenue growth”). Management believes these metrics, when viewed in conjunction with the comparable metrics calculated in accordance with generally accepted accounting principles in the United States ("GAAP"), are useful in evaluating the underlying business trends and ongoing operating performance of the Company.

The Company has included earnings before interest, taxes, depreciation and amortization (“EBITDA”) and EBITDA, adjusted for stock-based compensation expense, unrealized loss (gain) on foreign currency, trade refunds and charges, net, restructuring and transformation costs, costs related to exit and disposal activities and CEO transition costs (collectively, “Adjusted EBITDA”), in this press release to provide investors with additional information regarding the Company’s financial results. The Company has also included earnings before interest, taxes, depreciation and amortization margin (“EBITDA margin”) and EBITDA margin, adjusted for stock-based compensation expense, unrealized loss (gain) on foreign currency, trade refunds and charges, net, restructuring and transformation costs, costs related to exit and disposal activities and CEO transition costs (“Adjusted EBITDA margin”), in this press release to provide investors with additional information regarding the Company’s financial results.

The Company has included non-GAAP gross margin, adjusted for stock-based compensation expense, amortization expense and trade refunds and charges, net ("non-GAAP gross margin"), in this press release to provide investors with additional information regarding the Company’s financial results.

The Company has included non-GAAP operating margin, adjusted for stock-based compensation expense, amortization expense, trade refunds and charges, net, restructuring and transformation costs, costs related to exit and disposal activities and CEO transition costs (“non-GAAP operating margin”), in this press release to provide investors with additional information regarding the Company’s financial results.

The Company has included non-GAAP net income and non-GAAP net income per share, in each case, adjusted for stock-based compensation expense, amortization expense, unrealized loss (gain) on foreign currency, trade refunds and charges, net, restructuring and transformation costs, costs related to exit and disposal activities and CEO transition costs (“non-GAAP net income” and "non-GAAP net income per share", respectively), in this press release to provide investors with additional information regarding the Company’s financial results.

The Company has provided below reconciliations of GAAP to non-GAAP net income, non-GAAP net income per share, non-GAAP gross margin, non-GAAP operating margin, non-GAAP revenue growth by region and by product line, EBITDA, EBITDA margin, Adjusted EBITDA and Adjusted EBITDA margin to the most directly comparable measures calculated and presented in accordance with GAAP. These non-GAAP measures are used by the Company’s management and board of directors to understand and evaluate operating performance and trends, provide useful measures for period-to-period comparisons of the Company’s business, and in determining executive and senior management incentive compensation. Accordingly, the Company believes that these non-GAAP measures provide useful information to investors and others in understanding and evaluating operating results in the same manner as the Company's management and board of directors. These non-GAAP financial measures should not be considered a substitute for, or superior to, financial measures calculated in accordance with GAAP. These non-GAAP financial measures exclude significant expenses and income that are required by GAAP to be recorded in the Company's condensed consolidated financial statements and are subject to inherent limitations. Investors should review the reconciliations of non-GAAP financial measures to the comparable GAAP financial measures that are included in this press release.

Conference Call

The Company has scheduled a conference call to discuss its third quarter 2026 financial results and fourth quarter 2026 outlook today, October 29, 2026, at 8:30 a.m. EDT. To access the call in the U.S., please dial 877-709-8150 or outside the U.S. dial 201-689-8354 at least five minutes prior to the 8:30 a.m. EDT start time. No participant code is required. A simultaneous webcast of the call and accompanying presentation will be available via the investor relations section of the Protolabs website and the following link: https://edge.media-server.com/mmc/p/ec8fzrj2/. A replay will be available for 14 days following the call on the investor relations section of the Protolabs website.

About Protolabs

Protolabs is the world’s fastest manufacturing service enabling companies across every industry to streamline production of quality parts throughout the entire product life cycle. From custom prototyping to end-use production, we support product developers, engineers, and supply chain teams along every phase of their manufacturing journey. Get started now at protolabs.com.

Forward-Looking Statements

Statements contained in this press release regarding matters that are not historical or current facts are “forward-looking statements” within the meaning of The Private Securities Litigation Reform Act of 1995. These statements involve known and unknown risks, uncertainties and other factors which may cause the results of Protolabs to be materially different than those expressed or implied in such statements. Certain of these risk factors and others are described in the “Risk Factors” section within reports filed with the SEC. Other unknown or unpredictable factors also could have material adverse effects on Protolabs’ future results. The forward-looking statements included in this press release are made only as of the date hereof. Protolabs cannot guarantee future results, levels of activity, performance or achievements. Accordingly, you should not place undue reliance on these forward-looking statements. Finally, Protolabs expressly disclaims any intent or obligation to update any forward-looking statements to reflect subsequent events or circumstances.

Source: Proto Labs, Inc.

Investor Relations Contacts

Protolabs

Ryan Johnsrud, 612-225-4873

Sr. Manager – Investor Relations and Corporate Development

ryan.johnsrud@protolabs.com

Gateway Group, Inc.

949-574-3860

PRLB@gateway-grp.com

Media Contact

Protolabs

Brent Renneke, 763-479-7704

Corporate Communications Manager

brent.renneke@protolabs.com

Proto Labs, Inc.

Condensed Consolidated Balance Sheets

(In thousands)

September 30,

2026 December 31,

2025

(Unaudited)

Assets

Current assets

Cash and cash equivalents $ 133,780 $ 110,826

Short-term marketable securities 17,366 17,297

Accounts receivable, net 99,256 78,962

Inventory 16,538 14,401

Prepaid expenses and other current assets 11,844 9,590

Income taxes receivable 744 2,465

Total current assets 279,528 233,541

Property and equipment, net 206,932 215,261

Goodwill 273,991 273,991

Other intangible assets, net 15,663 18,612

Long-term marketable securities 23,903 14,308

Operating lease assets 3,130 2,836

Finance lease assets — 424

Other long-term assets 4,874 4,442

Total assets $ 808,021 $ 763,415

Liabilities and shareholders' equity

Current liabilities

Accounts payable $ 18,991 $ 15,104

Accrued compensation 24,632 23,674

Accrued liabilities and other 31,755 26,783

Current operating lease liabilities 1,239 1,155

Current finance lease liabilities — 286

Total current liabilities 76,617 67,002

Long-term operating lease liabilities 2,664 1,606

Long-term deferred tax liabilities 22,269 16,598

Other long-term liabilities 4,667 4,277

Shareholders' equity 701,804 673,932

Total liabilities and shareholders' equity $ 808,021 $ 763,415

Proto Labs, Inc.

Condensed Consolidated Statements of Operations

(In thousands, except share and per share amounts)

(Unaudited)

Three Months Ended

September 30, Nine Months Ended

September 30,

2026 2025 2026 2025

Revenue

Injection Molding $ 53,730 $ 47,770 $ 158,423 $ 143,908

CNC Machining 73,359 63,043 206,964 177,831

3D Printing 22,364 20,082 63,496 61,491

Sheet Metal 4,063 4,262 12,876 12,776

Other Revenue 802 209 1,236 628

Total revenue 154,318 135,366 442,995 396,634

Cost of revenue 85,655 74,073 241,398 219,869

Gross profit 68,663 61,293 201,597 176,765

Operating expenses

Marketing and sales 24,528 24,574 74,990 73,054

Research and development 11,019 10,705 32,350 32,487

General and administrative 18,241 17,163 54,903 52,763

Restructuring and transformation costs 434 — 2,779 —

Costs related to exit and disposal activities — 41 937 151

Total operating expenses 54,222 52,483 165,959 158,455

Income from operations 14,441 8,810 35,638 18,310

Other income, net 1,766 1,441 4,489 4,600

Income before income taxes 16,207 10,251 40,127 22,910

Provision for income taxes 4,445 3,035 11,102 7,668

Net income $ 11,762 $ 7,216 $ 29,025 $ 15,242

Net income per share:

Basic $ 0.49 $ 0.30 $ 1.21 $ 0.64

Diluted $ 0.48 $ 0.30 $ 1.19 $ 0.63

Shares used to compute net income per share:

Basic 24,024,031 23,889,157 23,943,656 23,974,054

Diluted 24,438,800 24,191,039 24,398,409 24,249,669

Proto Labs, Inc.

Condensed Consolidated Statements of Cash Flows

(In thousands)

(Unaudited)

Nine Months Ended

September 30,

2026 2025

Operating activities

Net income $ 29,025 $ 15,242

Adjustments to reconcile net income to net cash provided by operating activities:

Depreciation and amortization 24,269 25,693

Stock-based compensation expense 10,658 11,928

Deferred taxes 5,563 2,355

Interest on finance lease obligations 5 16

Loss on impairment of equipment 186 —

Impairments related to exit and closure of facilities 937 448

Gain on disposal of property and equipment (150) 16

Other (172) (179)

Changes in operating assets and liabilities (14,575) 2,355

Net cash provided by operating activities 55,746 57,874

Investing activities

Purchases of property, equipment and other capital assets (15,539) (6,792)

Proceeds from sales of property, equipment and other capital assets 1,279 811

Purchases of marketable securities (25,507) (13,553)

Proceeds from maturities of marketable securities 15,475 11,730

Net cash used in investing activities (24,292) (7,804)

Financing activities

Proceeds from issuance of common stock from equity plans 8,011 4,195

Purchases of shares withheld for tax obligations (6,083) (3,119)

Repurchases of common stock (10,038) (36,732)

Principal repayments of finance lease obligations (187) (231)

Net cash used in financing activities (8,297) (35,887)

Effect of exchange rate changes on cash and cash equivalents (203) 989

Net increase in cash and cash equivalents 22,954 15,172

Cash and cash equivalents, beginning of period 110,826 89,071

Cash and cash equivalents, end of period $ 133,780 $ 104,243

Proto Labs, Inc.

Reconciliation of GAAP to Non-GAAP Net Income and Non-GAAP Net Income per Share

(In thousands, except share and per share amounts)

(Unaudited)

Three Months Ended

September 30, Nine Months Ended

September 30,

2026 2025 2026 2025

Non-GAAP net income, adjusted for stock-based compensation expense, amortization expense, unrealized loss (gain) on foreign currency, trade refunds and charges, net, restructuring and transformation costs, costs related to exit and disposal activities and CEO transition costs

GAAP net income $ 11,762 $ 7,216 $ 29,025 $ 15,242

Add back:

Stock-based compensation expense 3,351 3,677 10,658 11,928

Amortization expense 902 935 2,720 2,770

Unrealized loss (gain) on foreign currency 129 (2) 266 (316)

Trade refunds and charges, net (709) — (1,036) —

Restructuring and transformation costs 434 — 2,779 —

Costs related to exit and disposal activities — 41 937 151

CEO transition costs — 14 — 1,376

Total adjustments 1

4,107 4,665 16,324 15,909

Income tax benefits on adjustments 2

(531) (500) (2,228) (1,700)

Non-GAAP net income $ 15,338 $ 11,381 $ 43,121 $ 29,451

Non-GAAP net income per share:

Basic $ 0.64 $ 0.48 $ 1.80 $ 1.23

Diluted $ 0.63 $ 0.47 $ 1.77 $ 1.21

Shares used to compute non-GAAP net income per share:

Basic 24,024,031 23,889,157 23,943,656 23,974,054

Diluted 24,438,800 24,191,039 24,398,409 24,249,669

1Stock-based compensation expense, amortization expense, unrealized loss (gain) on foreign currency, trade refunds and charges, net, restructuring and transformation costs, costs related to exit and disposal activities and CEO transition costs were included in the following GAAP consolidated statement of operations categories:

Three Months Ended

September 30, Nine Months Ended

September 30,

2026 2025 2026 2025

Cost of revenue $ 85 $ 781 $ 1,370 $ 2,350

Marketing and sales 798 837 2,322 2,423

Research and development 629 764 1,698 2,124

General and administrative 2,032 2,244 6,952 9,177

Restructuring and transformation costs 434 — 2,779 —

Costs related to exit and disposal activities — 41 937 151

Total operating expenses 3,893 3,886 14,688 13,875

Other income, net 129 (2) 266 (316)

Total adjustments $ 4,107 $ 4,665 $ 16,324 $ 15,909

2For the three and nine months ended September 30, 2026 and 2025, income tax effects were calculated using the effective tax rate for the relevant jurisdictions. The Company's non-GAAP tax rates differ from its GAAP tax rates due primarily to the mix of activity incurred in domestic and foreign tax jurisdictions and removing effective tax rate benefits from stock-based compensation activity in the respective period.

Proto Labs, Inc.

Reconciliation of GAAP to Non-GAAP Gross Margin

(In thousands)

(Unaudited)

Three Months Ended

September 30, Nine Months Ended

September 30,

2026 2025 2026 2025

Revenue $ 154,318 $ 135,366 $ 442,995 $ 396,634

Gross profit 68,663 61,293 201,597 176,765

GAAP gross margin 44.5 % 45.3 % 45.5 % 44.6 %

Add back:

Stock-based compensation expense 451 439 1,379 1,323

Amortization expense 343 342 1,027 1,027

Trade refunds and charges, net (709) — (1,036) —

Total adjustments 85 781 1,370 2,350

Non-GAAP gross profit $ 68,748 $ 62,074 $ 202,967 $ 179,115

Non-GAAP gross margin 44.5 % 45.9 % 45.8 % 45.2 %

Proto Labs, Inc.

Reconciliation of GAAP to Non-GAAP Operating Margin

(In thousands)

(Unaudited)

Three Months Ended

September 30, Nine Months Ended

September 30,

2026 2025 2026 2025

Revenue $ 154,318 $ 135,366 $ 442,995 $ 396,634

Income from operations 14,441 8,810 35,638 18,310

GAAP operating margin 9.4 % 6.5 % 8.0 % 4.6 %

Add back:

Stock-based compensation expense 3,351 3,677 10,658 11,928

Amortization expense 902 935 2,720 2,770

Trade refunds and charges, net (709) — (1,036) —

Restructuring and transformation costs 434 — 2,779 —

Costs related to exit and disposal activities — 41 937 151

CEO transition costs — 14 — 1,376

Total adjustments 3,978 4,667 16,058 16,225

Non-GAAP income from operations $ 18,419 $ 13,477 $ 51,696 $ 34,535

Non-GAAP operating margin 11.9 % 10.0 % 11.7 % 8.7 %

Proto Labs, Inc.

Reconciliation of GAAP Net Income to EBITDA and Adjusted EBITDA

(In thousands)

(Unaudited)

Three Months Ended

September 30, Nine Months Ended

September 30,

2026 2025 2026 2025

Revenue $ 154,318 $ 135,366 $ 442,995 $ 396,634

GAAP net income 11,762 7,216 29,025 15,242

GAAP net income margin 7.6 % 5.3 % 6.6 % 3.8 %

Add back:

Amortization expense $ 902 $ 935 $ 2,720 $ 2,770

Depreciation expense 7,206 7,494 21,549 22,923

Interest income, net (1,355) (1,281) (3,939) (3,532)

Provision for income taxes 4,445 3,035 11,102 7,668

EBITDA 22,960 17,399 60,457 45,071

EBITDA margin 14.9 % 12.9 % 13.6 % 11.4 %

Add back:

Stock-based compensation expense 3,351 3,677 10,658 11,928

Unrealized loss (gain) on foreign currency 129 (2) 266 (316)

Trade refunds and charges, net (709) — (1,036) —

Restructuring and transformation costs 434 — 2,779 —

Costs related to exit and disposal activities — 41 937 151

CEO transition costs — 14 — 1,376

Total adjustments 3,205 3,730 13,604 13,139

Adjusted EBITDA $ 26,165 $ 21,129 $ 74,061 $ 58,210

Adjusted EBITDA margin 17.0 % 15.6 % 16.7 % 14.7 %

Proto Labs, Inc.

Comparison of GAAP to Non-GAAP Revenue Growth by Region

(In thousands)

(Unaudited)

Three Months Ended

September 30, 2026 Three Months Ended

September 30, 2025

Change2

% Change

Organic3

GAAP

Foreign

Currency1

Non-GAAP GAAP

Revenues

United States $ 125,412 $ — $ 125,412 $ 109,361 14.7 % 14.7 %

Europe 28,906 267 29,173 26,005 11.2 12.2

Total revenue $ 154,318 $ 267 $ 154,585 $ 135,366 14.0 % 14.2 %

Nine Months Ended

September 30, 2026 Nine Months Ended

September 30, 2025

Change2

% Change

Organic3

GAAP

Foreign

Currency1

Non-GAAP GAAP

Revenues

United States $ 360,298 $ — $ 360,298 $ 320,340 12.5 % 12.5 %

Europe 82,697 (2,337) 80,360 76,294 8.4 5.3

Total revenue $ 442,995 $ (2,337) $ 440,658 $ 396,634 11.7 % 11.1 %

1Revenue for the three and nine months ended September 30, 2026 has been recalculated using 2025 foreign currency exchange rates in effect during comparable periods to provide information useful in evaluating the underlying business trends excluding the impact of changes in foreign currency exchange rates.

2This column presents the percentage change from GAAP revenue for the three and nine months ended September 30, 2025 to GAAP revenue for the three and nine months ended September 30, 2026.

3This column presents the percentage change from GAAP revenue for the three and nine months ended September 30, 2025 to non-GAAP revenue for the three and nine months ended September 30, 2026 (as recalculated using the foreign currency exchange rates in effect during the three and nine months ended September 30, 2025) in order to provide a constant-currency comparison.

Proto Labs, Inc.

Comparison of GAAP to Non-GAAP Revenue Growth by Product Line

(In thousands)

(Unaudited)

Three Months Ended

September 30, 2026 Three Months Ended

September 30, 2025

Change2

% Change

Organic3

GAAP

Foreign

Currency1

Non-GAAP GAAP

Revenues

Injection Molding $ 53,730 $ 46 $ 53,776 $ 47,770 12.5 % 12.6 %

CNC Machining 73,359 184 73,543 63,043 16.4 16.7

3D Printing 22,364 29 22,393 20,082 11.4 11.5

Sheet Metal 4,063 2 4,065 4,262 (4.7) (4.6)

Other Revenue 802 6 808 209 283.7 286.6

Total revenue $ 154,318 $ 267 $ 154,585 $ 135,366 14.0 % 14.2 %

Nine Months Ended

September 30, 2026 Nine Months Ended

September 30, 2025

Change2

% Change

Organic3

GAAP

Foreign

Currency1

Non-GAAP GAAP

Revenues

Injection Molding $ 158,423 $ (674) $ 157,749 $ 143,908 10.1 % 9.6 %

CNC Machining 206,964 (1,248) 205,716 177,831 16.4 15.7

3D Printing 63,496 (369) 63,127 61,491 3.3 2.7

Sheet Metal 12,876 (48) 12,828 12,776 0.8 0.4

Other Revenue 1,236 2 1,238 628 96.8 97.1

Total revenue $ 442,995 $ (2,337) $ 440,658 $ 396,634 11.7 % 11.1 %

2This column presents the percentage change from GAAP revenue for the three and nine months ended September 30, 2025 to GAAP revenue for the three and nine months ended September 30, 2026.

Proto Labs, Inc.

Customer Contact Information

(In thousands, except customer contacts and per customer contact amounts)

(Unaudited)

Three Months Ended

September 30, Nine Months Ended

September 30,

2026 2025 2026 2025

Revenue $ 154,318 $ 135,366 $ 442,995 $ 396,634

Customer contacts 20,777 21,252 40,129 41,873

Revenue per customer contact1

$ 7,427 $ 6,370 $ 11,039 $ 9,472

1Revenue per customer contact is calculated using the revenue recognized during the respective period divided by the actual number of customer contacts served during the same period. Customer contacts are product developers, engineers, procurement and supply chain professionals and other individuals who place an order, and that order is shipped and invoiced during the period. The Company believes revenue per customer contact is useful to investors in evaluating the underlying business trends and ongoing operating performance of the Company.

Proto Labs, Inc.

Reconciliation of GAAP to Non-GAAP Guidance

(Unaudited)

Q4 2026 Outlook

Low High

GAAP diluted net income per share $ 0.28 $ 0.36

Add back:

Stock-based compensation expense 0.15 0.15

Amortization expense 0.03 0.03

Total adjustments 0.18 0.18

Non-GAAP diluted net income per share $ 0.46 $ 0.54

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Cover

Oct. 29, 2026

Cover [Abstract]

Document Type

8-K

Document Period End Date

Oct. 29, 2026

Entity Registrant Name

Proto Labs, Inc.

Entity Incorporation, State or Country Code

Entity File Number

001-35435

Entity Tax Identification Number

41-1939628

Entity Address, Address Line One

5540 Pioneer Creek Drive

Entity Address, City or Town

Maple Plain

Entity Address, State or Province

Entity Address, Postal Zip Code

55359

City Area Code

(763)

Local Phone Number

479-3680

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Pre-commencement Tender Offer

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Pre-commencement Issuer Tender Offer

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Title of 12(b) Security

Common Stock, Par Value $0.001 Per Share

Trading Symbol

PRLB

Security Exchange Name

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Entity Emerging Growth Company

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Entity Central Index Key

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Boolean flag that is true when the XBRL content amends previously-filed or accepted submission.

+ References

No definition available.

+ Details

Name:

dei_AmendmentFlag

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Area code of city

+ References

No definition available.

+ Details

Name:

dei_CityAreaCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Cover page.

+ References

No definition available.

+ Details

Name:

dei_CoverAbstract

Namespace Prefix:

dei_

Data Type:

xbrli:stringItemType

Balance Type:

Period Type:

duration

- Definition

For the EDGAR submission types of Form 8-K: the date of the report, the date of the earliest event reported; for the EDGAR submission types of Form N-1A: the filing date; for all other submission types: the end of the reporting or transition period. The format of the date is YYYY-MM-DD.

+ References

No definition available.

+ Details

Name:

dei_DocumentPeriodEndDate

Namespace Prefix:

dei_

Data Type:

xbrli:dateItemType

Balance Type:

Period Type:

duration

- Definition

The type of document being provided (such as 10-K, 10-Q, 485BPOS, etc). The document type is limited to the same value as the supporting SEC submission type, or the word 'Other'.

+ References

No definition available.

+ Details

Name:

dei_DocumentType

Namespace Prefix:

dei_

Data Type:

dei:submissionTypeItemType

Balance Type:

Period Type:

duration

- Definition

Address Line 1 such as Attn, Building Name, Street Name

+ References

No definition available.

+ Details

Name:

dei_EntityAddressAddressLine1

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the City or Town

+ References

No definition available.

+ Details

Name:

dei_EntityAddressCityOrTown

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Code for the postal or zip code

+ References

No definition available.

+ Details

Name:

dei_EntityAddressPostalZipCode

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Name of the state or province.

+ References

No definition available.

+ Details

Name:

dei_EntityAddressStateOrProvince

Namespace Prefix:

dei_

Data Type:

dei:stateOrProvinceItemType

Balance Type:

Period Type:

duration

- Definition

A unique 10-digit SEC-issued value to identify entities that have filed disclosures with the SEC. It is commonly abbreviated as CIK.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityCentralIndexKey

Namespace Prefix:

dei_

Data Type:

dei:centralIndexKeyItemType

Balance Type:

Period Type:

duration

- Definition

Indicate if registrant meets the emerging growth company criteria.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityEmergingGrowthCompany

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Commission file number. The field allows up to 17 characters. The prefix may contain 1-3 digits, the sequence number may contain 1-8 digits, the optional suffix may contain 1-4 characters, and the fields are separated with a hyphen.

+ References

No definition available.

+ Details

Name:

dei_EntityFileNumber

Namespace Prefix:

dei_

Data Type:

dei:fileNumberItemType

Balance Type:

Period Type:

duration

- Definition

Two-character EDGAR code representing the state or country of incorporation.

+ References

No definition available.

+ Details

Name:

dei_EntityIncorporationStateCountryCode

Namespace Prefix:

dei_

Data Type:

dei:edgarStateCountryItemType

Balance Type:

Period Type:

duration

- Definition

The exact name of the entity filing the report as specified in its charter, which is required by forms filed with the SEC.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityRegistrantName

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

The Tax Identification Number (TIN), also known as an Employer Identification Number (EIN), is a unique 9-digit value assigned by the IRS.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b-2

+ Details

Name:

dei_EntityTaxIdentificationNumber

Namespace Prefix:

dei_

Data Type:

dei:employerIdItemType

Balance Type:

Period Type:

duration

- Definition

Local phone number for entity.

+ References

No definition available.

+ Details

Name:

dei_LocalPhoneNumber

Namespace Prefix:

dei_

Data Type:

xbrli:normalizedStringItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 13e

-Subsection 4c

+ Details

Name:

dei_PreCommencementIssuerTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14d

-Subsection 2b

+ Details

Name:

dei_PreCommencementTenderOffer

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Title of a 12(b) registered security.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection b

+ Details

Name:

dei_Security12bTitle

Namespace Prefix:

dei_

Data Type:

dei:securityTitleItemType

Balance Type:

Period Type:

duration

- Definition

Name of the Exchange on which a security is registered.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 12

-Subsection d1-1

+ Details

Name:

dei_SecurityExchangeName

Namespace Prefix:

dei_

Data Type:

dei:edgarExchangeCodeItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as soliciting material pursuant to Rule 14a-12 under the Exchange Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Exchange Act

-Number 240

-Section 14a

-Subsection 12

+ Details

Name:

dei_SolicitingMaterial

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration

- Definition

Trading symbol of an instrument as listed on an exchange.

+ References

No definition available.

+ Details

Name:

dei_TradingSymbol

Namespace Prefix:

dei_

Data Type:

dei:tradingSymbolItemType

Balance Type:

Period Type:

duration

- Definition

Boolean flag that is true when the Form 8-K filing is intended to satisfy the filing obligation of the registrant as written communications pursuant to Rule 425 under the Securities Act.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Securities Act

-Number 230

-Section 425

+ Details

Name:

dei_WrittenCommunications

Namespace Prefix:

dei_

Data Type:

xbrli:booleanItemType

Balance Type:

Period Type:

duration