First Business Financial Services, Inc.
US ˙ NasdaqGS ˙ US3193901002

SecurityFBIZ / First Business Financial Services, Inc.
InstitutionState Street Corp
Latest Disclosed Ownership173,718 shares
Latest Disclosed Value $ 9,368,612
State Street Corp reports 9.91% increase in ownership of FBIZ / First Business Financial Services, Inc.

On May 15, 2026 - State Street Corp filed a 13F-HR form disclosing ownership of 173,718 shares of First Business Financial Services, Inc. (US:FBIZ) valued at $9,368,612 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 158,055 shares of First Business Financial Services, Inc.. This represents a change in shares of 9.91% during the quarter. The current value of the position is $10,023,529 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)
2026-05-15 2026-03-31 13F FIRST BUSINESS FINL SVCS COM 319390100 173,718 15,663 9.91 9,369 9.16 0.0003
2026-02-13 2025-12-31 13F FIRST BUSINESS FINL SVCS COM 319390100 158,055 -906 -0.57 8,582 5.33 0.0003
2025-11-14 2025-09-30 13F FIRST BUSINESS FINL SVCS COM 319390100 158,961 3,250 2.09 8,148 3.30 0.0003
2025-08-14 2025-06-30 13F FIRST BUSINESS FINL SVCS COM 319390100 155,711 10,710 7.39 7,888 15.39 0.0003
2025-05-15 2025-03-31 13F FIRST BUSINESS FINL SVCS COM 319390100 145,001 2,385 1.67 6,837 3.56 0.0003
2025-02-14 2024-12-31 13F FIRST BUSINESS FINL SVCS COM 319390100 142,616 5,926 4.34 6,602 5.94 0.0003
2024-11-14 2024-09-30 13F FIRST BUSINESS FINL SVCS COM 319390100 136,690 2,607 1.94 6,232 25.65 0.0003
2024-08-14 2024-06-30 13F FIRST BUSINESS FINL SVCS COM 319390100 134,083 8,636 6.88 4,960 5.42 0.0002
2024-05-15 2024-03-31 13F FIRST BUSINESS FINL SVCS COM 319390100 125,447 7,773 6.61 4,704 -0.30 0.0002
2024-02-14 2023-12-31 13F FIRST BUSINESS FINL SVCS COM 319390100 117,674 1,598 1.38 4,719 35.46 0.0002
2023-11-14 2023-09-30 13F FIRST BUSINESS FINL SVCS COM 319390100 116,076 -100 -0.09 3,483 1.66 0.0002
2023-08-14 2023-06-30 13F FIRST BUSINESS FINL SVCS COM 319390100 116,176 2,300 2.02 3,426 -1.38 0.0002
2023-05-15 2023-03-31 13F FIRST BUSINESS FINL SVCS COM 319390100 113,876 7,516 7.07 3,474 -10.63 0.0002
2023-05-15 2022-12-31 13F/A-99 FIRST BUSINESS FINL SVCS COM 319390100 106,360 11,041 11.58 3,887 26.20 0.0002
2023-05-15 2022-12-31 13F FIRST BUSINESS FINL SVCS COM 319390100 106,360 11,041 3,887 0.0002
2022-11-15 2022-09-30 13F FIRST BUSINESS FINL SVCS COM 319390100 95,319 14,346 17.72 3,080 21.93 0.0002
2022-08-15 2022-06-30 13F FIRST BUSINESS FINL SVCS COM 319390100 80,973 54,646 207.57 2,526 192.36 0.0002
2022-05-16 2022-03-31 13F FIRST BUSINESS FINL SVCS COM 319390100 26,327 2,076 8.56 864 22.21 0.0000
2022-02-14 2021-12-31 13F FIRST BUSINESS FINL SVCS COM 319390100 24,251 0 0.00 707 1.58 0.0000
2021-11-15 2021-09-30 13F FIRST BUSINESS FINL SVCS COM 319390100 24,251 1,800 8.02 696 14.47 0.0000
2021-08-16 2021-06-30 13F FIRST BUSINESS FINL SVCS COM 319390100 22,451 -115,823 -83.76 608 -82.22 0.0000
2021-07-09 2021-03-31 13F/A-1 FIRST BUS FINL SVCS INC WIS COM 319390100 138,274 -15,665 -10.18 3,420 20.68 0.0002
2021-05-17 2021-03-31 13F FIRST BUS FINL SVCS INC WIS COM 319390100 138,274 -15,665 3,420 0.0002
2021-02-16 2020-12-31 13F FIRST BUS FINL SVCS INC WIS COM 319390100 153,939 -1,461 -0.94 2,834 27.60 0.0002
2020-11-10 2020-09-30 13F FIRST BUS FINL SVCS INC WIS COM 319390100 155,400 -8,214 -5.02 2,221 -17.47 0.0002
2020-08-14 2020-06-30 13F FIRST BUS FINL SVCS INC WIS COM 319390100 163,614 4,686 2.95 2,691 9.26 0.0002
2020-06-19 2020-03-31 13F/A-1 FIRST BUS FINL SVCS INC WIS COM 319390100 158,928 -8,804 -5.25 2,463 -44.23 0.0002
2020-05-11 2020-03-31 13F FIRST BUS FINL SVCS INC WIS COM 319390100 158,928 -8,804 2,463 216.3010
2020-02-06 2019-12-31 13F FIRST BUS FINL SVCS INC WIS COM 319390100 167,732 -1,738 -1.03 4,416 8.21 0.0003
2019-11-14 2019-09-30 13F FIRST BUS FINL SVCS INC WIS COM 319390100 169,470 1,984 1.18 4,081 3.68 0.0003
2019-08-14 2019-06-30 13F FIRST BUS FINL SVCS INC WIS COM 319390100 167,486 2,517 1.53 3,936 19.16 0.0003
2019-05-15 2019-03-31 13F FIRST BUS FINL SVCS INC WIS COM 319390100 164,969 -7,228 -4.20 3,303 -1.70 0.0003
2019-02-12 2018-12-31 13F FIRST BUS FINL SVCS INC WIS COM 319390100 172,197 -2,421 -1.39 3,360 -17.02 0.0003
2018-11-09 2018-09-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 174,618 -2,275 -1.29 4,049 -11.96 0.0003
2018-08-14 2018-06-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 176,893 6,692 3.93 4,599 7.40 0.0004
2018-05-15 2018-03-31 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 170,201 5,349 3.24 4,282 17.57 0.0004
2018-02-14 2017-12-31 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 164,852 11,492 7.49 3,642 4.33 0.0003
2017-11-14 2017-09-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 153,360 2,504 1.66 3,491 0.29 0.0003
2017-08-14 2017-06-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 150,856 17,984 13.53 3,481 0.87 0.0003
2017-05-15 2017-03-31 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 132,872 -2,235 -1.65 3,451 7.68 0.0003
2017-02-09 2016-12-31 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 135,107 4,393 3.36 3,205 4.30 0.0003
2017-01-13 2016-09-30 13F/A-1 FIRST BUSINESS FINL SRV Common equity shares 319390100 130,714 630 0.48 3,073 0.66 0.0003
2016-11-14 2016-09-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 130,714 3,073
2016-08-12 2016-06-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 130,084 8,857 7.31 3,053 9.82 0.0003
2016-05-20 2016-03-31 13F/A-1 FIRST BUSINESS FINL SRV Common equity shares 319390100 121,227 11,504 10.48 2,780 1.24 0.0003
2016-05-12 2016-03-31 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 121,227 2,780
2016-02-16 2015-12-31 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 109,723 7,129 6.95 2,746 13.75 0.0003
2015-11-16 2015-09-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 102,594 53,195 107.68 2,414 4.28 0.0003
2015-08-13 2015-06-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 49,399 3,704 8.11 2,315 17.10 0.0002
2015-05-15 2015-03-31 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 45,695 6,182 15.65 1,977 4.38 0.0002
2015-02-11 2014-12-31 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 39,513 1,959 5.22 1,894 14.86 0.0002
2014-11-12 2014-09-30 13F/A-1 FIRST BUSINESS FINL SRV Common equity shares 319390100 37,554 2,735 7.85 1,649 0.67 0.0002
2014-11-10 2014-09-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 37,554 1,649
2014-08-12 2014-06-30 13F FIRST BUSINESS FINL SRV Common equity shares 319390100 34,819 34,819 1,638 0.0002
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.