Security key
319390100
FIRST BUSINESS FINANCIAL SERVICES, INC. - Common Stock (FBIZ)
CUSIP: 319390100
Q1 2026 13F Holders as of 31 Mar 2026
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 5,776,822
- Total 13F value
- $311,647,808
- Share change
- +47,126
- SEC-reported price per share
- $53.93
- Number of holders
- 144
- Value change
- +$2,508,168
- Number of buys
- 71
- Number of sells
- 47
- Shares outstanding
- 8,268,347
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
144
Top holders
10
FBIZ full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Previous quarter: Q4 2025
FIRST BUSINESS FINANCIAL SERVICES, INC. SEC filings
FIRST BUSINESS FINANCIAL SERVICES, INC. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 319390100
Recent filing periods:
Ownership snapshot
Top reported holders of FBIZ - FIRST BUSINESS FINANCIAL SERVICES, INC. - Common Stock (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
BlackRock, Inc.
Disclosed value leader
BlackRock, Inc.
Comparable rows
15/15
Latest evidence
16 Feb 2026
13F
13D/G
3/4/5
Lead comparable stake: 6.1%
13D/G row: BlackRock, Inc.
Showing 1-6 of 15 holder rows.
Quick read
BlackRock, Inc. leads the comparable SEC ownership view at 6.1%.
15 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens BlackRock, Inc.'s linked filing trail.
Comparable ownership
Top 5
BlackRock, Inc.
6.1%
BlackRock Portfolio Management LLC
4.9%
Ralph R. Kauten
0.51%
Niamh M. Kristufek
0.04%
DIMENSIONAL FUND ADVISORS LP
6%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| BlackRock, Inc. |
13F
13D/G
Company
|
6.1%
from 13D/G
|
$47,229,491
869,788 shares
|
— | 31 Dec 2025 |
| BlackRock Portfolio Management LLC |
13D/G
|
4.9%
|
$20,767,938
405,149 shares
|
-$4,835,356 | 30 Sep 2025 |
| Ralph R. Kauten |
3/4/5
Director
|
0.51%
|
$2,092,730
42,443 shares
|
— | 30 Jul 2025 |
| Niamh M. Kristufek |
3/4/5
President - Specialty Finance
|
0.04%
|
$194,688
3,336 shares
|
— | 16 Feb 2026 |
| DIMENSIONAL FUND ADVISORS LP |
13F
Company
|
6%
|
$27,116,347
499,376 shares
|
— | 31 Dec 2025 |
| VANGUARD GROUP INC |
13F
Company
|
5.8%
|
$26,090,173
480,482 shares
|
— | 31 Dec 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
144
Shares
5,776,822
Rows available
144
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q4 2025 Across Filers
Q4 2025 holders
139
Q1 2026 holders
144
Holder diff
5
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend