// company-profile
Old Second Bancorp Inc
OSBCExchangeNasdaqSectorState Commercial BanksInc.DEFilings155Insiders17
// api This Old Second Bancorp 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, Old Second Bancorp Inc insiders bought $502 (1 transaction) and sold $1.2M (5 transactions).
- Most active insider: COLLINS GARY S with 5 transactions totaling $638K.
- Largest single sale: $519K by Pilmer Donald on May 11, 2026.
Activity skews bearish — sales outpace buys.
Institutional Ownership
Top 13F-HR holders of Old Second Bancorp Inc as of 2026-03-31
Total reported AUM
$718.9M
QoQ change
+13.0%
Reporting period
2026-03-31
#1
DIMENSIONAL FUND ADVISORS LP
CIK 354204
$46.0M
2.3M shares
#2
VANGUARD CAPITAL MANAGEMENT LLC
CIK 2100119
$45.4M
2.3M shares
#3
BlackRock, Inc.
CIK 2012383
$39.5M
2.0M 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 22, 2026 | COLLINS GARY S | OSBC | Sale | 5,120 | $21.12 | $108K |
| May 21, 2026 | COLLINS GARY S | OSBC | Sale | 10,000 | $21.12 | $211K |
| May 11, 2026 | Pilmer Donald | OSBC | Sale | 25,000 | $20.75 | $519K |
| May 11, 2026 | Lyons Billy J Jr. | OSBC | Purchase | 24 | $20.90 | $1K |
| May 8, 2026 | COLLINS GARY S | OSBC | Sale | 10,000 | $21.24 | $212K |
45 more transactions hidden
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