OSBC Institutional Ownership
Who owns Old Second Bancorp Inc and what the big funds did with it last quarter, from every SEC 13F filing. 184 funds reported holding OSBC at Jun 30, 2026, together owning 76.3% of the company.
- ▲95 buying vs 66 selling
- ▲Held by funds +2.1 pts
- ▼Funds holding -4
- ▼Superinvestors: 1 added, 2 cut
- ●Put/call not meaningful
What the filings show, not a forecast. Positions can be up to 45 days old and leave out short sales.
Funds holding and ownership
8 quartersQuarter over quarter
all 13F filers| Q2 2026 | This quarter | Q1 2026 | Change |
|---|---|---|---|
| Funds holding | 184 | 188 | −2.1% |
| In funds' top 10 | 3 | 4 | −25.0% |
| 13F shares | 38.8M | 37.8M | +2.8% |
| Held by funds | 76.3% | 74.3% | +2.1 pts |
| New positions | 19 | 19 | 0.0% |
| Increased | 76 | 57 | +33.3% |
| Reduced | 46 | 66 | −30.3% |
| Sold out | 20 | 19 | +5.3% |
| Calls (shares) | 0 | 0 | – |
| Puts (shares) | 0 | 0 | – |
| Put/call ratio | – | – | – |
Buyers vs sellers
adding or new vs cutting or sold outSuperinvestors in OSBC
All superinvestors →
Who owns OSBC
share of fund held shares- Index and passive funds37.6%
- Active managers and hedge funds48.9%
- Banks and brokers10.5%
- Pensions, insurers and other2.9%
The top 10 holders own 52.2% of all OSBC shares that funds reported. Groups are our own grouping of filers by name.
Filed so far for Q3 2026
34 funds changed their position- River Street Advisors LLCSold out−779K sh
- Congress Asset Management CoAdded+73K sh
- Principal Financial Group IncAdded+54K sh
- Hudson Edge Investment Partners Inc.Trimmed−35K sh
- Forum Financial Management, LPAdded+32K sh
🔒 Free account: see all 20.
Top holders
Q2 2026| # | Fund | Of company | Shares | Value | Change |
|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 8.45% | 4.3M | $100M | +172K |
| 2 | Dimensional Fund Advisors LP | 4.91% | 2.5M | $58.3M | +110K |
| 3 | Vanguard Capital Management LLC | 4.28% | 2.2M | $50.8M | −72K |
| 4 | State Street Corp | 3.62% | 1.8M | $42.9M | +240K |
| 5 | Davis Asset Management, L.P. | 3.54% | 1.8M | $42M | 0 |
| 6 | American Century Companies Inc | 3.51% | 1.8M | $41.6M | +193K |
| 7 | Goldman Sachs Group Inc | 3.19% | 1.6M | $37.9M | −67K |
| 8 | FJ Capital Management LLC | 2.87% | 1.5M | $34.1M | −45K |
| 9 | Boston Partners | 2.78% | 1.4M | $32.9M | −29K |
| 10 | Geode Capital Management, LLC | 2.65% | 1.3M | $31.5M | +67K |
- Congress Asset Management Co+339K sh+$7.9M
- Citadel Advisors LLC+244K sh+$5.7M
- State Street Corp+240K sh+$5.6M
- Mariner, LLC+207K sh+$4.8M
- American Century Companies Inc+193K sh+$4.5M
- BlackRock, Inc.+172K sh+$4M
- Franklin Resources Inc+171K sh+$4M
- Two Sigma Investments, LP+133K sh+$3.1M
- Wellington Management Group LLP−313K sh−$7.3M
- Northern Trust Corp−209K sh−$4.9M
- Jpmorgan Chase & Co−145K sh−$3.4M
- Jacobs Asset Management, LLC−150K sh−$3M
- UBS Group AG−112K sh−$2.6M
- Sei Investments Co−85K sh−$2M
- Knights of Columbus Asset Advisors LLC−74K sh−$1.7M
- Vanguard Capital Management LLC−72K sh−$1.7M
OSBC institutional ownership FAQ
Who owns the most OSBC stock?
In Q2 2026 13F filings the largest holder of OSBC was BlackRock, Inc., followed by Dimensional Fund Advisors LP and Vanguard Capital Management LLC. Index fund managers are usually the biggest holders of large companies.
What percentage of OSBC is owned by institutions?
Funds that file 13F reports held 76.3% of OSBC's shares at Jun 30, 2026, compared with 74.3% a quarter earlier. That counts every manager with more than $100 million in US stocks.
Are hedge funds buying OSBC?
In Q2 2026, 95 funds bought OSBC (19 of them new positions) and 66 sold (20 sold out completely). Among well known investors, 1 added and 2 cut. Our fund sentiment for OSBC is neutral.
What is OSBC's institutional put/call ratio?
Too few option positions were reported for a meaningful ratio.
How current is this OSBC ownership data?
13F filings show holdings at the end of each quarter and are due within 45 days, so positions can be up to six weeks old when they appear. We add each new filing within minutes, and the "filed so far" list shows funds that have already reported the next quarter.
For informational and educational purposes only. Not investment advice, and not a recommendation to buy or sell any security. Fund sentiment summarises what 13F filings show and is not a forecast. Holdings come from SEC Form 13F filings as reported and show positions at the end of the quarter, up to 45 days before the filing. A 13F leaves out short positions, cash, bonds and most foreign holdings. See all hedge fund holdings.