Security record
OSBC
Old Second Bancorp, Inc. · Financial Services · Banks - Regional
76Tracked holders
-7Δ holders
26.35MShares held
$612.20MReported value
+2New positions
−9Exits
Momentum inputs (comparable managers):
holder breadth -8.4% ·
share flow +2.7% ·
net new positions -9.2%
— formula
Concentrated accumulation — rising shares among fewer holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 76 | -7 | 26.35M | $612.20M | +2 | −9 |
| Q1 2026 | 86 | +3 | 25.75M | $518.74M | +6 | −3 |
| Q4 2025 | 83 | 0 | 26.46M | $516.04M | +2 | −2 |
| Q3 2025 | 19 | 0 | 14.70M | $254.02M | +1 | −1 |
| Q2 2025 | 16 | -2 | 10.11M | $179.35M | — | −2 |
| Q1 2025 | 15 | +2 | 4.21M | $70.01M | +2 | — |
| Q4 2024 | 13 | 0 | 4.39M | $78.07M | +1 | −1 |
| Q3 2024 | 12 | +1 | 2.37M | $37.00M | +1 | — |
| Q2 2024 | 11 | — | 2.48M | $36.78M | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 4.30M | +4.2% | $100.25M | 0.0% | ▲ Add | 5 | SEC ↗ ×12 |
| 2 | Dimensional Fund Advisors Lp | 2.50M | +4.6% | $58.27M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 3 | Vanguard Capital Management Llc | 2.18M | -3.2% | $50.83M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 4 | State Street Global Advisors ✦ (passive) | 1.84M | +15.0% | $42.89M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 5 | American Century Companies Inc | 1.78M | +12.1% | $41.60M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 6 | Goldman Sachs Group ✦ | 1.62M | -3.9% | $37.89M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 7 | Boston Partners | 1.42M | -2.0% | $32.92M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 8 | Geode Capital Management ✦ (passive) | 1.35M | +5.3% | $31.47M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 9 | Manufacturers Life Insurance… | 872.65K | -0.7% | $20.35M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 10 | Northern Trust Corp | 555.41K | -27.3% | $12.95M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 11 | Alliancebernstein L.P. | 641.85K | -7.1% | $12.94M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 12 | JPMorgan Chase ✦ | 555.60K | -20.7% | $12.90M | 0.0% | ▼ Trim | 4 | SEC ↗ ×4 |
| 13 | Wellington Management ✦ | 544.35K | -36.5% | $12.69M | 0.0% | ▼ Trim | 9 | SEC ↗ ×2 |
| 14 | Nuveen, LLC | 492.16K | +17.3% | $11.48M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 15 | Charles Schwab Investment… | 431.30K | +0.1% | $10.06M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 16 | AQR Capital Management ✦ | 386.23K | -1.5% | $9.01M | 0.0% | ▼ Trim | 9 | SEC ↗ ×7 |
| 17 | Bank Of America Corp /De/ | 372.65K | +12.5% | $8.69M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 18 | Bank of New York Mellon Corp | 342.01K | +1.4% | $7.98M | 0.0% | ▲ Add | 3 | SEC ↗ ×6 |
| 19 | Morgan Stanley ✦ | 318.32K | +14.3% | $7.42M | 0.0% | ▲ Add | 4 | SEC ↗ ×11 |
| 20 | Citadel Advisors ✦ | 304.02K | +406.1% | $7.09M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 21 | Franklin Resources Inc | 259.32K | +194.1% | $6.05M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 22 | Mariner, LLC | 225.30K | +1147.0% | $5.25M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 23 | Arrowstreet Capital ✦ | 210.75K | +49.4% | $4.91M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 24 | Two Sigma Investments ✦ | 200.82K | +198.1% | $4.68M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 25 | Squarepoint Ops LLC | 167.88K | -1.6% | $3.92M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 26 | Blair William & Co/Il | 163.23K | +0.2% | $3.81M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 27 | UBS Group AG | 147.22K | -43.2% | $3.43M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 28 | Victory Capital Management Inc | 141.91K | +2.1% | $3.31M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 29 | Russell Investments Group, Ltd. | 135.01K | +20.6% | $3.15M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 30 | Sei Investments Co | 117.67K | -42.1% | $2.74M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 31 | D. E. Shaw & Co. ✦ | 114.33K | New | $2.67M | 0.0% | New | 1 | SEC ↗ |
| 32 | Swiss National Bank | 100.40K | +1.7% | $2.34M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 33 | Fisher Asset Management ✦ | 97.28K | 0.0% | $2.27M | 0.0% | Held | 9 | SEC ↗ |
| 34 | First Trust Advisors Lp | 94.35K | +402.9% | $2.20M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 35 | Barclays Plc | 87.60K | +0.7% | $2.04M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 36 | Principal Financial Group Inc | 80.53K | +7.2% | $1.88M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 37 | Invesco Ltd. | 77.24K | -5.4% | $1.80M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 38 | UBS AM, a distinct business unit of… | 76.13K | +12.7% | $1.78M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 39 | Quantinno Capital Management LP | 73.56K | +47.5% | $1.72M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 40 | Rhumbline Advisers | 70.00K | +5.9% | $1.63M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 41 | Hsbc Holdings Plc | 66.31K | -22.1% | $1.54M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 42 | Bank Of Montreal /Can/ | 64.27K | -45.8% | $1.50M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 43 | Citigroup Inc | 55.10K | +48.0% | $1.28M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 44 | Creative Planning | 53.85K | +14.7% | $1.26M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 45 | Deutsche Bank Ag\ | 51.03K | +9.8% | $1.19M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 46 | T. Rowe Price ✦ | 46.96K | +13.2% | $1.10M | 0.0% | ▲ Add | 9 | SEC ↗ ×2 |
| 47 | Wealth Enhancement Advisory… | 45.55K | +6.5% | $1.04M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 48 | HighTower Advisors, LLC | 43.56K | -0.7% | $1.02M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 49 | Wells Fargo & Company/Mn | 42.86K | +116.2% | $999,432 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 50 | Legal & General Group Plc | 40.58K | +1.2% | $946,281 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 51 | Fidelity (FMR) ✦ | 39.92K | +583.4% | $930,983 | 0.0% | ▲ Add | 5 | SEC ↗ ×2 |
| 52 | State Of Wisconsin Investment Board | 30.53K | +70.7% | $711,913 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 53 | Royal Bank Of Canada | 30.05K | -4.8% | $701,000 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 54 | Osaic Holdings, Inc. | 27.23K | +187.4% | $635,108 | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 55 | Envestnet Asset Management Inc | 24.61K | +25.6% | $573,949 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 56 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 23.39K | -1.1% | $545,431 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 57 | Renaissance Technologies ✦ | 21.22K | -76.5% | $494,874 | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 58 | Mercer Global Advisors Inc /Adv | 20.59K | +23.0% | $480,179 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 59 | Raymond James Financial Inc | 19.31K | +0.1% | $450,286 | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 60 | New York State Common Retirement… | 18.77K | +30.6% | $437,623 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 61 | Bnp Paribas Financial Markets | 18.73K | +36.2% | $436,714 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 62 | Ameriprise Financial Inc | 17.57K | -24.6% | $409,733 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 63 | Federated Hermes, Inc. | 17.22K | -3.4% | $401,650 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 64 | Cetera Investment Advisers | 15.80K | +35.0% | $368,503 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 65 | Zurcher Kantonalbank (Zurich… | 14.19K | 0.0% | $330,981 | 0.0% | Held | 3 | SEC ↗ |
| 66 | Captrust Financial Advisors | 13.31K | -26.6% | $310,366 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 67 | State Board Of Administration Of… | 12.39K | 0.0% | $288,935 | 0.0% | Held | 3 | SEC ↗ |
| 68 | Voya Investment Management Llc | 10.64K | New | $248,032 | 0.0% | New | 1 | SEC ↗ |
| 69 | Cerity Partners LLC | 10.47K | -0.6% | $244,207 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 70 | Jones Financial Companies Lllp | 1.05K | +2825.0% | $24,619 | 0.0% | ▲ Add | 2 | SEC ↗ |
| 71 | Us Bancorp \De\ | 1.00K | +1.7% | $23,367 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 72 | Northwestern Mutual Wealth… | 400 | 0.0% | $9,328 | 0.0% | Held | 3 | SEC ↗ |
| 73 | Pnc Financial Services Group, Inc. | 297 | +5.0% | $6,926 | 0.0% | ▲ Add | 3 | SEC ↗ |
| 74 | Danske Bank A/S | 200 | 0.0% | $4,664 | 0.0% | Held | 3 | SEC ↗ |
| 75 | Optiver Holding B.V. | 178 | -4.3% | $4,151 | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 76 | Rockefeller Capital Management L.P. | 123 | -53.6% | $2,869 | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| D. E. Shaw & Co. | $2.67M | 0.0% |
| Voya Investment Management Llc | $248,032 | 0.0% |
Exited
| Jane Street Group, Llc | $1.04M | was 0.0% |
| Corient Private Wealth LP | $825,354 | was 0.0% |
| Susquehanna International… | $776,825 | was 0.0% |
| GAMCO Investors | $659,655 | was 0.0% |
| Millennium Management | $634,536 | was 0.0% |
| Assenagon Asset Management… | $360,058 | was 0.0% |
| Universal- Beteiligungs- und… | $318,951 | was 0.0% |
| Amundi | $276,313 | was 0.0% |
| National Bank Of Canada /Fi/ | $60 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 187 holders, 37.08M shares, $741.50M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Sep 23
COLLINS GARY S
Officer, Director · 16.00K sh · $395,080
Sep 08
MCLEAN HUGH H
Director · 25.00K sh · $640,768
Sep 04
COLLINS GARY S
Officer, Director · 5.00K sh · $128,525
Sep 02
Campbell Darin Patrick
Officer, Director · 24.00K sh · $612,792
Aug 12
Eccher James
Officer, Director · 19.31K sh · $494,701
Aug 11
Eccher James
Officer, Director · 55.69K sh · $1.42M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Oct 08
SC 13G — DIMENSIONAL FUND ADVISORS LP
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q2 2026 ·
Methodology ·
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