Form4insider filings, from the source

Company · CIK 0000357173 · SIC 6022 — State Commercial Banks · Nasdaq

OLD SECOND BANCORP INC · OSBC

Insider activity reported against this company. All insider holders · On EDGAR ↗

1M3M6M1Y2YAll datashares as filed — not split-adjusted
Open-market buys & salesbuys $0 · 0sales $1.8M · 4net −$1.8M
$10k$10k$100k$100k$1M$1MbuyssalesAug 27Sep 1Sep 6Sep 11Sep 17Sep 22Sep 27

Reported at this company — common stock

TradeReported (ET)InsiderSharesAvg priceTotalOwned afterΔ stakeFlags
Sep 23, 2026 SForm 4 →Sep 23, 6:34 pm EDTGary S CollinsVICE CHAIRMAN, Director16,000$24.69$395,08014,136−53.1%
Sep 8, 2026 SForm 4 →Sep 8, 5:17 pm EDTHugh H McLeanDirector25,000$25.63$640,768135,351−15.6%
Sep 4, 2026 SForm 4 →Sep 11, 11:50 am EDTGary S CollinsVICE CHAIRMAN, Director5,000$25.71$128,52553,136−8.60% late
Sep 3, 2026 SForm 4 →Sep 3, 5:40 pm EDTHugh H McLeanDirector25,000$25.73$643,175135,351−15.6% amended
Sep 2, 2026 SForm 4 →Sep 3, 5:33 pm EDTDarin Patrick CampbellPresident, Powersports Lending, Director24,000$25.53$612,792250,589−8.74%

Reported at this company — derivatives (options, RSUs, warrants)

No reported derivative activity in this period.