← United States · Coverage record
US · SEC FORM 4
OLD SECOND BANCORP INC
OSBC · Nasdaq · CIK 0000357173 · Financial Services · Banks—Regional
INSIDER SIGNAL
1 qualifying P purchase group
in the current 180-day scoring window
27 Form 4 transaction lines observed in the same window
12 sales · 14 option, withholding, award, gift or other lines
WHY NO ACTIVE SIGNAL?
Score anatomy
No score is calculated because there is no qualifying purchase in the active window. Unavailable inputs are not treated as zero or as a bearish signal.
Why is there no score?
- No qualifying open-market purchase supplies cluster, size, role, recency or conviction inputs.
- Sales and other Form 4 activity remain visible as context and do not create a negative score.
Sales and other Form 4 activity are shown separately and do not create a negative buy signal. Absence of buying is not scored as bearish.
Insider activity timeline
Owner lanes show the latest 180 days. Symbol shape identifies the transaction type; sales remain context only.
Showing the six most active owners; 2 additional owner(s) remain in Form 4 evidence.
Purchase breadth & concentration
Roles in the peak window: Director. Concentration uses priced qualifying P lines only and does not change the saved score.
SIGNAL HISTORY
Scores are archived only when the company qualifies for a published US buy-signal snapshot. Last qualifying purchase: 2026-05-11 · Lyons Billy J Jr..
Recent Form 4 activity
P is an open-market or private purchase. S is a sale. M, F, A and G usually describe exercises, tax withholding, awards and gifts. These categories remain visually separate.
Market context
Market context has not been captured for this ticker yet. The daily market-context job processes the US universe in rotating batches.
Short interest
Short interest is external context reported to FINRA by broker-dealers. It does not affect the Insider Signal.
- Shares short
- 2,745,379
- Previous report
- 2,469,231
- Avg daily volume
- 512,663
- Days to cover
- 5.4
FINRA settlement date: 2026-09-30 · Captured 2026-10-12 · FINRA equity short interest ↗. A share count, published about a week after each of two settlement dates a month; not a percentage of shares outstanding.
Historical equity purchases
Qualifying code P transactions in the local Form 4 history, including purchases outside the current signal window.
| Transaction date | Reporting owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-05-11 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 24 | USD 20.90 | USD 502 | SEC filing ↗ |
| 2025-08-04 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 25 | USD 16.61 | USD 415 | SEC filing ↗ |
| 2025-02-10 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 22 | USD 19.02 | USD 418 | SEC filing ↗ |
| 2024-12-23 | Temple Rocks Patti | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 5,625 | USD 17.79 | USD 100,069 | SEC filing ↗ |
| 2024-11-04 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 26 | USD 16.15 | USD 420 | SEC filing ↗ |
| 2024-08-05 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 23 | USD 14.86 | USD 342 | SEC filing ↗ |
| 2024-05-06 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 24 | USD 14.44 | USD 347 | SEC filing ↗ |
| 2024-02-06 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 26 | USD 13.46 | USD 350 | SEC filing ↗ |
| 2022-12-16 | COLLINS GARY S | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 900 | USD 16.04 | USD 14,436 | SEC filing ↗ |
| 2022-11-02 | Finn Barry | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 10,000 | USD 16.44 | USD 164,400 | SEC filing ↗ |
| 2022-09-16 | COLLINS GARY S | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 1,000 | USD 13.35 | USD 13,350 | SEC filing ↗ |
| 2022-06-09 | Williams John JR | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 3,000 | USD 15.13 | USD 45,390 | SEC filing ↗ |
| 2022-05-18 | Finn Barry | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 4,000 | USD 14.18 | USD 56,720 | SEC filing ↗ |
| 2022-02-08 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 23 | USD 14.42 | USD 332 | SEC filing ↗ |
| 2021-09-22 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 200 | USD 11.86 | USD 2,372 | SEC filing ↗ |
Form 4 evidence
84 transaction lines in the latest 365-day window; 479 in local history.
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | Pilmer Donald | J (J) | Old Second Bancorp, Inc. Common Stock | 11 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Gartelmann Richard A JR | J (J) | Old Second Bancorp, Inc. Common Stock | 35 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Eccher James | J (J) | Old Second Bancorp, Inc. Common Stock | 109 | USD 0.00 | USD 0 | SEC filing ↗ |
Show recent Form 4 evidence (30 grouped rows)
| Date | Owner | Type | Security | Shares | Avg. price | Approx. value | Source |
|---|---|---|---|---|---|---|---|
| 2026-09-30 | Pilmer Donald | J (J) | Old Second Bancorp, Inc. Common Stock | 11 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Gartelmann Richard A JR | J (J) | Old Second Bancorp, Inc. Common Stock | 35 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | Eccher James | J (J) | Old Second Bancorp, Inc. Common Stock | 109 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | COLLINS GARY S | J (J) | Old Second Bancorp, Inc. Common Stock | 30 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-30 | ADAMS BRADLEY S. | J (J) | Old Second Bancorp, Inc. Common Stock | 28 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-09-23 | COLLINS GARY S | Sale (S) | Old Second Bancorp, Inc. Common Stock | 16,000 | USD 24.69 | USD 395,040 | SEC filing ↗ |
| 2026-09-08 | MCLEAN HUGH H | Sale (S) | Old Second Bancorp, Inc. Common Stock | 25,000 | USD 25.63 | USD 640,750 | SEC filing ↗ |
| 2026-09-04 | COLLINS GARY S | Sale (S) | Old Second Bancorp, Inc. Common Stock | 5,000 | USD 25.71 | USD 128,550 | SEC filing ↗ |
| 2026-09-03 | MCLEAN HUGH H | Sale (S) | Old Second Bancorp, Inc. Common Stock | 25,000 | USD 25.73 | USD 643,250 | SEC filing ↗ |
| 2026-09-02 | Campbell Darin Patrick | Sale (S) | Old Second Bancorp, Inc. Common Stock | 24,000 | USD 25.53 | USD 612,720 | SEC filing ↗ |
| 2026-08-12 | Eccher James | Sale (S) | Old Second Bancorp, Inc. Common Stock | 19,313 | USD 25.61 | USD 494,606 | SEC filing ↗ |
| 2026-08-11 | Eccher James | Sale (S) | Old Second Bancorp, Inc. Common Stock | 55,687 | USD 25.46 | USD 1,417,791 | SEC filing ↗ |
| 2026-08-10 | Lyons Billy J Jr. | Award / grant (A) | Old Second Bancorp, Inc. Common Stock | 20 | USD 25.38 | USD 508 | SEC filing ↗ |
| 2026-06-30 | Pilmer Donald | J (J) | Old Second Bancorp, Inc. Common Stock | 15 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | Gartelmann Richard A JR | J (J) | Old Second Bancorp, Inc. Common Stock | 42 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | Eccher James | J (J) | Old Second Bancorp, Inc. Common Stock | 132 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | COLLINS GARY S | J (J) | Old Second Bancorp, Inc. Common Stock | 37 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-06-30 | ADAMS BRADLEY S. | J (J) | Old Second Bancorp, Inc. Common Stock | 34 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-05-22 | COLLINS GARY S | Sale (S) | Old Second Bancorp, Inc. Common Stock | 5,120 | USD 21.12 | USD 108,134 | SEC filing ↗ |
| 2026-05-21 | COLLINS GARY S | Sale (S) | Old Second Bancorp, Inc. Common Stock | 10,000 | USD 21.12 | USD 211,200 | SEC filing ↗ |
| 2026-05-11 | Lyons Billy J Jr. | Purchase (P) | Old Second Bancorp, Inc. Common Stock | 24 | USD 20.90 | USD 502 | SEC filing ↗ |
| 2026-05-11 | Pilmer Donald | Sale (S) | Old Second Bancorp, Inc. Common Stock | 25,000 | USD 20.75 | USD 518,750 | SEC filing ↗ |
| 2026-05-08 | COLLINS GARY S | Sale (S) | Old Second Bancorp, Inc. Common Stock | 15,000 | USD 21.24 | USD 318,550 | SEC filing ↗ |
| 2026-03-20 | COLLINS GARY S | Sale (S) | Old Second Bancorp, Inc. Common Stock | 22,154 | USD 19.38 | USD 429,345 | SEC filing ↗ |
| 2026-03-02 | Pilmer Donald | Tax withholding (F) | Old Second Bancorp, Inc. Common Stock | 2,720 | USD 19.91 | USD 54,155 | SEC filing ↗ |
| 2026-03-02 | Pilmer Donald | Award / grant (A) | Old Second Bancorp, Inc. Common Stock | 9,201 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-02 | Gartelmann Richard A JR | Tax withholding (F) | Old Second Bancorp, Inc. Common Stock | 1,537 | USD 19.91 | USD 30,602 | SEC filing ↗ |
| 2026-03-02 | Gartelmann Richard A JR | Award / grant (A) | Old Second Bancorp, Inc. Common Stock | 4,523 | USD 0.00 | USD 0 | SEC filing ↗ |
| 2026-03-02 | Eccher James | Tax withholding (F) | Old Second Bancorp, Inc. Common Stock | 12,838 | USD 19.91 | USD 255,605 | SEC filing ↗ |
| 2026-03-02 | Eccher James | Award / grant (A) | Old Second Bancorp, Inc. Common Stock | 43,818 | USD 0.00 | USD 0 | SEC filing ↗ |
Multiple price lines in one filing are grouped and share-weighted. Price and value are blank when a grouped filing line lacks price evidence.
Snapshot & identity
| Snapshot date | 2026-10-18 |
|---|---|
| Ranking version | US-v1.2 |
| Data quality | PASS ELIGIBLE · — |
| Ticker | OSBC |
| CIK | 0000357173 |
| Sector | Financial Services |
| Industry | Banks—Regional Yahoo Finance |
| SEC SIC | 6022 State Commercial Banks |
| Exchange | Nasdaq |
Data coverage
| Local Form 4 history | 479 transaction lines from 2020-02-18 to 2026-09-30 51 P purchase lines · 40 S sale lines · 388 other lines |
|---|---|
| SEC company submissions | Open SEC filings ↗ |
Local ledger as of 2026-10-18. Mapping status is an audit field and does not erase SEC filing evidence.