# EDGAR Filing Document

**Accession Number:** 0001521951
**File Stem:** 0001193125-26-154867
**Filing Date:** 2026-4
**Character Count:** 6243
**Document Hash:** 6b08ad6e3fb1792ee15240a8522aac27
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-154867.hdr.sgml**: 20260414

**ACCESSION NUMBER**: 0001193125-26-154867

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 9

**CONFORMED PERIOD OF REPORT**: 20260409

**ITEM INFORMATION**: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers

**ITEM INFORMATION**: Financial Statements and Exhibits

**FILED AS OF DATE**: 20260414

**DATE AS OF CHANGE**: 20260414

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIRST BUSINESS FINANCIAL SERVICES, INC.
- **CENTRAL INDEX KEY:** 0001521951
- **STANDARD INDUSTRIAL CLASSIFICATION:** STATE COMMERCIAL BANKS [6022]
- **ORGANIZATION NAME:** 02 Finance
- **EIN:** 391576570
- **STATE OF INCORPORATION:** WI
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-34095
- **FILM NUMBER:** 26860819

**BUSINESS ADDRESS:**
- **STREET 1:** 401 CHARMANY DRIVE
- **CITY:** MADISON
- **STATE:** WI
- **ZIP:** 53719
- **BUSINESS PHONE:** 608-238-8008

**MAIL ADDRESS:**
- **STREET 1:** 401 CHARMANY DRIVE
- **STREET 2:** PO BOX 44961
- **CITY:** MADISON
- **STATE:** WI
- **ZIP:** 53744

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** First Business Financial Services, Inc.
- **DATE OF NAME CHANGE:** 20110527

?xml version='1.0' encoding='ASCII'? 8-K

**UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549**

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## FORM 8-K

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**CURRENT REPORT**

**Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934**

**Date of Report (Date of earliest event reported):** April 9, 2026<br>

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First Business Financial Services, Inc.

**(Exact name of Registrant as Specified in Its Charter)**

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| | | |
|:---|:---|:---|
| Wisconsin | 001-34095 | 39-1576570 |
| **(State or Other Jurisdiction<br>of Incorporation)** | **(Commission File Number)** | **(IRS Employer<br>Identification No.)** |
| 401 Charmany Drive |  |  |
| Madison**,** Wisconsin |  | 53719 |
| **(Address of Principal Executive Offices)** |  | **(Zip Code)** |

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**Registrant's Telephone Number, Including Area Code:** 608 238-8008<br>

N/A<br>

**(Former Name or Former Address, if Changed Since Last Report)**

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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:**

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| | | |
|:---|:---|:---|
| **<br>Title of each class** | **Trading<br>Symbol(s)** | **<br>Name of each exchange on which registered** |
| Common Stock, $0.01 par value | FBIZ | The Nasdaq Stock Market LLC |

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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. ☐

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**Item 5.02. Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers.**

Effective April 9, 2026, the Compensation Committee (the "Committee") of the Board of Directors of First Business Financial Services, Inc. (the "Company") approved the vesting of the Performance Restricted Stock Units, or "PRSUs", granted to eligible executive officers of the Company in 2023 under its Long-Term Incentive Plan for the performance measurement period beginning in 2023 and ending in 2025 (the "2023 Award"). The vesting of the 2023 Award was determined by Total Shareholder Return ("TSR") and Return on Average Tangible Common Equity ("ROATCE") Company performance goals. As noted in the Company's Definitive Proxy Statement on Schedule 14A filed with the Securities and Exchange Commission on March 5, 2026 (the "Proxy Statement"), as of the date of the Proxy Statement, the number of shares earned under the 2023 Award was unknown due to the unavailability of final ROATCE information.

The Committee determined that the Company's performance at a "Superior" level under each of the TSR and ROATCE performance goals during the performance period resulted in the payout of the Company's common stock to each of the Company's Named Executive Officers listed below:

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| | |
|:---|:---|
| &nbsp;&nbsp;**Named Executive Officers** | &nbsp;&nbsp;**Shares Vested** |
| &nbsp;&nbsp;Corey A. Chambas | &nbsp;&nbsp;10370 |
| &nbsp;&nbsp;James E. Hartlieb | &nbsp;&nbsp;2730 |
| &nbsp;&nbsp;Bradley A. Quade | &nbsp;&nbsp;2740 |
| &nbsp;&nbsp;David R. Seiler | &nbsp;&nbsp;4780 |
| &nbsp;&nbsp;Brian D. Spielmann | &nbsp;&nbsp;3190 |

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| | |
|:---|:---|
| **Item 9.01** | **Financial Statements and Exhibits.** |
| **(a)** | **Not applicable** |
| **(b)** | **Not applicable** |
| **(c)** | **Not applicable** |
| **(d)** | **Exhibits. The following exhibits are being furnished herewith:** |
|  | 104 Cover Page Interactive Data File (embedded within the Inline XBRL Document) |

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**SIGNATURES**

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.

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| | | |
|:---|:---|:---|
| April 14, 2026 | **FIRST BUSINESS FINANCIAL SERVICES, INC.** | **FIRST BUSINESS FINANCIAL SERVICES, INC.** |
|  | By: | /s/ Brian D. Spielmann |
|  | Name: | Brian D. Spielmann |
|  | Title: | Chief Financial Officer |

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