// company-profile
First Business Financial Services, Inc.
FBIZExchangeNasdaqSectorState Commercial BanksInc.WIFilings127Insiders22
// api This First Business Financial Services, Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
// 90-day insight
Over the last 90 days, First Business Financial Services, Inc. insiders bought $0 (16 transactions) and sold $805K (10 transactions).
- Most active insider: CHAMBAS COREY A with 3 transactions totaling $286K.
- Largest single sale: $286K by CHAMBAS COREY A on Apr 10, 2026.
Activity skews bullish — buys outpace sales.
Institutional Ownership
Top 13F-HR holders of First Business Financial Services, Inc. as of 2026-03-31
Total reported AUM
$289.0M
QoQ change
+16.6%
Reporting period
2026-03-31
#1
DIMENSIONAL FUND ADVISORS LP
CIK 354204
$25.9M
481K shares
#2
First Business Financial Services, Inc.
CIK 1521951
$19.5M
361K shares
#3
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$18.4M
341K shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| May 16, 2026 | Benson Laurie S. | FBIZ | Award | 710 | $0.00 | $0K |
| May 16, 2026 | Garcia Laura M. | FBIZ | Tax Withholding | 194 | $53.81 | $10K |
| May 16, 2026 | Olszewski Daniel P. | FBIZ | Award | 710 | $0.00 | $0K |
| May 16, 2026 | Seiler David R. | FBIZ | Award | 3,815 | $0.00 | $0K |
| May 16, 2026 | Kilcoyne Gerald L | FBIZ | Award | 710 | $0.00 | $0K |
45 more transactions hidden
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