# OLD SECOND BANCORP INC DEL COM

OLD SECOND BANCORP INC DEL COM is a security (CUSIP 680277100) tracked across SEC portfolio filings. 196 institutional managers reported $770.4M on Form 13F as of 2026-06-30; 19 registered fund positions totaling $42.0M via N-PORT as of 2026-05-31.

## Summary

- Issuer: OLD SECOND BANCORP INC DEL
- Class: COM
- CUSIP: 680277100
- Asset category: EC
- 13F holders: 196
- 13F value: $770.4M
- 13F period: 2026-06-30
- N-PORT fund positions: 19
- N-PORT value: $42.0M
- N-PORT report: 2026-05-31

## Top institutional holders (Form 13F)

_Showing 15 of 196 managers by value._

| Manager | Location | Value | Shares |
| --- | --- | --- | --- |
| BlackRock, Inc. | New York, NY | $83.2M | 4,126,244 |
| [VANGUARD GROUP INC](https://search.stillhousedata.com/firm/105958) | Valley Forge, PA | $63.9M | 3,278,388 |
| DIMENSIONAL FUND ADVISORS LP | AUSTIN, TX | $48.2M | 2,388,862 |
| Davis Asset Management, L.P. | Sausalito, CA | $36.3M | 1,800,000 |
| GOLDMAN SACHS GROUP INC | NEW YORK, NY | $34.1M | 1,691,523 |
| Boston Partners | BOSTON, MA | $32.9M | 1,415,165 |
| STATE STREET CORP | BOSTON, MA | $32.2M | 1,599,302 |
| AMERICAN CENTURY COMPANIES INC | KANSAS CITY, MO | $32.1M | 1,590,943 |
| [FJ Capital Management LLC](https://search.stillhousedata.com/firm/158049) | MCLEAN, VA | $30.3M | 1,505,102 |
| [GEODE CAPITAL MANAGEMENT, LLC](https://search.stillhousedata.com/firm/115504) | BOSTON, MA | $25.9M | 1,282,011 |
| [KENNEDY CAPITAL MANAGEMENT LLC](https://search.stillhousedata.com/firm/105834) | ST LOUIS, MO | $25.6M | 1,268,490 |
| BANC FUNDS CO LLC | CHICAGO, IL | $20.7M | 1,029,143 |
| [River Street Advisors LLC](https://search.stillhousedata.com/firm/153537) | AURORA, IL | $18.2M | 779,008 |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE | Toronto, A6 | $17.7M | 878,670 |
| WELLINGTON MANAGEMENT GROUP LLP | BOSTON, MA | $17.3M | 857,785 |

## Top fund holders (N-PORT)

_Showing 15 of 19 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD EXTENDED MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002841) | VANGUARD INDEX FUNDS | $11.9M | 1.46% |
| [Regional Bank Fund](https://search.stillhousedata.com/fund/S000000635) | John Hancock Investment Trust II | $9.3M | 106.33% |
| John Hancock Financial Opportunities Fund | John Hancock Financial Opportunities Fund | $7.2M | 101.69% |
| [VANGUARD RUSSELL 2000 INDEX FUND](https://search.stillhousedata.com/fund/S000030003) | VANGUARD SCOTTSDALE FUNDS | $5.5M | 3.15% |
| [U.S. MICRO CAP PORTFOLIO](https://search.stillhousedata.com/fund/S000000948) | DFA INVESTMENT DIMENSIONS GROUP INC | $3.5M | 4.63% |
| [Master Small Cap Index Series](https://search.stillhousedata.com/fund/S000002716) | Quantitative Master Series LLC | $1.6M | 3.38% |
| [GATOR CAPITAL LONG/SHORT FUND](https://search.stillhousedata.com/fund/S000011446) | Caldwell & Orkin Funds, Inc. | $905K | 111.43% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $587K | 0.10% |
| [VANGUARD INSTITUTIONAL TOTAL STOCK MARKET INDEX FUND](https://search.stillhousedata.com/fund/S000002855) | VANGUARD INSTITUTIONAL INDEX FUNDS | $434K | 0.14% |
| [Goldman Sachs ActiveBeta(R) U.S. Small Cap Equity ETF](https://search.stillhousedata.com/fund/S000048296) | Goldman Sachs ETF Trust | $293K | 2.97% |
| [CORNERCAP SMALL-CAP VALUE FUND](https://search.stillhousedata.com/fund/S000004377) | CORNERCAP GROUP OF FUNDS | $249K | 20.71% |
| [DWS Small Cap Index VIP](https://search.stillhousedata.com/fund/S000006223) | DEUTSCHE DWS INVESTMENTS VIT FUNDS | $142K | 3.40% |
| [BlackRock Advantage SMID Cap Fund, Inc.](https://search.stillhousedata.com/fund/S000002323) | BlackRock Advantage SMID Cap Fund, Inc. | $108K | 1.43% |
| [Bridge Builder Tax Managed Small/Mid Cap Fund](https://search.stillhousedata.com/fund/S000076295) | Bridge Builder Trust | $97K | 0.32% |
| [Federated Hermes Global Allocation Fund](https://search.stillhousedata.com/fund/S000009117) | Federated Hermes Global Allocation Fund | $77K | 2.63% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/680277100.md)
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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.