Company · Ownership research

FIRST BUSINESS FINANCIAL SERVICES, INC. FBIZ

CIK 0001521951 · CUSIP 319390100

Insider trading Initial holdings Institutional holders

Quarter-end disclosures, not live holdings.

This page lists the top 20 of 144 rows by value; the complete set is available through the API.

Some filings reported values in thousands; those figures were scaled ×1,000 to dollars.

Top 20 institutions

Weight means this stock's share of the manager's own portfolio.

By reported value

#	Manager	Value	Manager weight	Change vs prior	Source
01	BlackRock, Inc. CIK 2012383 · View history	$46.93M 870,202 shares	0.00%	+414(0.00%)Added	SEC filing ↗ May 13, 2026	▾
02	DIMENSIONAL FUND ADVISORS LP CIK 354204 · View history	$26.95M 499,716 shares	0.01%	+340(+0.10%)Added	SEC filing ↗ May 7, 2026	▾
03	First Business Financial Services, Inc. CIK 1521951 · View history	$19.49M 361,311 shares	1.73%	0(0.00%)Unchanged	SEC filing ↗ May 1, 2026	▾
04	VANGUARD CAPITAL MANAGEMENT LLC CIK 2100119 · Amended · View history	$18.37M 340,538 shares	0.00%	—	SEC filing ↗ May 15, 2026	▾
05	MANUFACTURERS LIFE INSURANCE COMPANY, THE CIK 928047 · View history	$13.20M 244,795 shares	0.01%	-3.64K(-1.50%)Reduced	SEC filing ↗ May 15, 2026	▾
06	AMERICAN CENTURY COMPANIES INC CIK 748054 · View history	$12.95M 240,137 shares	0.01%	+23.13K(+10.70%)Added	SEC filing ↗ May 15, 2026	▾
07	GEODE CAPITAL MANAGEMENT, LLC CIK 1214717 · View history	$10.78M 199,772 shares	0.00%	-35.28K(-15.00%)Reduced	SEC filing ↗ May 15, 2026	▾
08	STATE STREET CORP CIK 93751 · View history	$9.37M 173,718 shares	0.00%	+15.66K(+9.90%)Added	SEC filing ↗ May 15, 2026	▾
09	BANC FUNDS CO LLC CIK 1029311 · View history	$8.96M 166,224 shares	1.67%	0(0.00%)Unchanged	SEC filing ↗ May 14, 2026	▾
10	Cutler Capital Management, LLC CIK 1353098 · View history	$8.34M 154,590 shares	2.30%	+805(+0.50%)Added	SEC filing ↗ May 15, 2026	▾
11	LSV ASSET MANAGEMENT CIK 1050470 · View history	$7.75M 143,625 shares	0.02%	+9.50K(+7.10%)Added	SEC filing ↗ May 11, 2026	▾
12	Pacific Ridge Capital Partners, LLC CIK 1591546 · View history	$7.60M 140,892 shares	1.65%	+437(+0.30%)Added	SEC filing ↗ May 11, 2026	▾
13	RENAISSANCE TECHNOLOGIES LLC CIK 1037389 · View history	$6.60M 122,465 shares	0.01%	-5.80K(-4.50%)Reduced	SEC filing ↗ May 14, 2026	▾
14	FEDERATED HERMES, INC. CIK 1056288 · View history	$6.26M 116,133 shares	0.01%	+11.37K(+10.90%)Added	SEC filing ↗ May 11, 2026	▾
15	De Lisle Partners LLP CIK 2011184 · View history	$5.34M 98,812 shares	0.64%	+2.00K(+2.10%)Added	SEC filing ↗ May 13, 2026	▾
16	AQR CAPITAL MANAGEMENT LLC CIK 1167557 · View history	$5.10M 94,627 shares	0.00%	-11.32K(-10.70%)Reduced	SEC filing ↗ May 15, 2026	▾
17	VANGUARD PORTFOLIO MANAGEMENT LLC CIK 2100121 · Amended · View history	$4.98M 92,269 shares	0.00%	—	SEC filing ↗ May 8, 2026	▾
18	Hillsdale Investment Management Inc. CIK 1368465 · View history	$4.48M 83,071 shares	0.12%	0(0.00%)Unchanged	SEC filing ↗ May 4, 2026	▾
19	NORTHERN TRUST CORP CIK 73124 · View history	$4.29M 79,473 shares	0.00%	+3.92K(+5.20%)Added	SEC filing ↗ May 14, 2026	▾
20	BRIDGEWAY CAPITAL MANAGEMENT, LLC CIK 1107261 · View history	$4.17M 77,382 shares	0.08%	+3.65K(+5.00%)Added	SEC filing ↗ May 15, 2026	▾

Showing 20 / 144 institutions. The complete set is available through the API.

Coverage & totals by quarter

Reporting institutions

144

Cancelled or null records excluded

Disclosed shares

5,776,827

Not deduplicated across managers

Disclosed value

$311.65M

Not market cap or free float

Reporting institutions by quarter

Counts also change with data coverage and reporting entities; they do not measure net buying. Distinct managers with a live stock row in this CUSIP; totals may include overlapping filings and are not a share of the company.

FIRST BUSINESS FINANCIAL SERVICES, INC. · Q1 2026

Explore all 144 reporting institutions.

This page includes 20 of 144 reporting institutions. Log in to look up the full history beyond 3 years, use advanced screening & filtering, download CSV, and get the complete set through the Akkru API.

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Sources, coverage & how to read this data

Figures are as reported to the SEC and merged with later amendments where Akkru could match them. Preview limits apply to what is listed, not to the totals, which come from the complete reported data. Nothing is zero-filled: a missing quarter or month is shown as missing.