OSBC

Old Second Bancorp Inc Cross-source read$25.53 0.74%
FinancialsCUSIP 680277100· EOD Sep 8, 2026

Among active 13F managers last quarter, 3 opened and 27 added, while 10 reduced; the largest holder to move was FJ Capital Management LLC (−3.0%). Over the last 180 days, 5 insiders sold and 1 insider bought, a net -$5.5M in open-market trades.

Tracked 13F holders
169
66 in Q2 2026 filings
13F value (tracked)
$777.0M
Smart-money readMixed
Net sellingNet buying
Funds · active managers, latest 13F
30 adding · 10 trimming
Insiders · Form 4 open-market, 180d
1 buying · 5 selling · -$5.5M
US House · STOCK Act, 180d
0 buying · 0 selling

The legs disagree, or only one of them leans.

Price & smart-money activity

$25.53 0.74%5Y +110.1%
$10.11$14.35$18.59$22.82$27.062021202220232024202520263172015143211722116211418232522152722122918272743321342540223530413253284384664231519116
Hover for who · click for detailEnd-of-day closing prices52w $16.71 – $25.91

Who owns OSBC?

169 tracked 13F filers · ranked by shares held

169 tracked 13F filers disclose a position in OSBC as of the latest SEC 13F filings, a combined $777.0M in reported value. Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

#FundSharesPosition valueLast moveAs ofHistory
1BlackRock, Inc.4.3M
$100.2M
+4.2%
Added · +172K sh
Q2 2026
2Dimensional Fund Advisors LP2.4M
$48.2M
+5.7%
Added · +128K sh
Q1 2026
3Vanguard Capital Management LLC2.2M
$50.8M
−3.2%
Reduced · −72K sh
Q2 2026
4State Street Corp1.8M
$42.9M
+15%
Added · +240K sh
Q2 2026
5Davis Asset Management, L.P.1.8M
$42.0M
Held
Q2 2026
6Goldman Sachs Group Inc1.7M
$34.1M
+34%
Added · +428K sh
Q1 2026
7American Century Companies Inc1.6M
$32.1M
+8.2%
Added · +121K sh
Q1 2026
8FJ Capital Management LLC1.5M
$34.1M
−3.0%
Reduced · −45K sh
Q2 2026
9Boston Partners1.4M
$29.3M
+77%
Added · +627K sh
Q1 2026
10Geode Capital Management, LLC1.3M
$31.5M
+5.3%
Added · +67K sh
Q2 2026
11Kennedy Capital Management LLC1.3M
$25.6M
+0.1%
Added · +1K sh
Q1 2026
12Manufacturers Life Insurance Company, The879K
$17.7M
−1.5%
Reduced · −13K sh
Q1 2026
13Vanguard Portfolio Management LLC819K
$19.1M
+15%
Added · +107K sh
Q2 2026
14Stieven Capital Advisors, L.P.815K
$19.0M
+5.4%
Added · +42K sh
Q2 2026
15River Street Advisors LLC779K
$18.2M
+4.3%
Added · +32K sh
Q2 2026
16Northern Trust Corp764K
$15.4M
−13%
Reduced · −117K sh
Q1 2026
17JPMorgan Chase & Co701K
$13.9M
−18%
Reduced · −158K sh
Q1 2026
18AllianceBernstein L.P.691K
$13.5M
+0.7%
Added · +5K sh
Q1 2026
19Bridgeway Capital Management, LLC453K
$10.6M
+3.4%
Added · +15K sh
Q2 2026
20Charles Schwab Investment Management Inc431K
$8.7M
−1.5%
Reduced · −7K sh
Q1 2026
21Nuveen, LLC420K
$8.5M
+1.0%
Added · +4K sh
Q1 2026
22AQR Capital Management LLC392K
$7.9M
−12%
Reduced · −55K sh
Q1 2026
23Vanguard Fiduciary Trust Co341K
$8.0M
+1.7%
Added · +6K sh
Q2 2026
24Bank of New York Mellon Corp337K
$6.8M
−2.0%
Reduced · −7K sh
Q1 2026
25Bank Of America Corp331K
$6.7M
−3.3%
Reduced · −11K sh
Q1 2026

Holders and values reflect the 13F filers Arkolith currently tracks, not the entire institutional universe. Counts and totals are a floor, not the full institutional ownership.

Is OSBC being bought or sold by institutions?

Last quarter, 3 funds opened a new position in OSBC and 27 added to an existing one, while 10 reduced. Based on 13F filings from active, signal-eligible managers (passive index funds and other mechanical holders are excluded from this count).

Opened
3
funds took a first position
Added
27
added to an existing position
Reduced
10
reduced, still holding
Biggest moves · ranked by size of the change, positions above a floor

Funds that own OSBC also own

CompanyCo-held byTheir position there
JPMorgan Chase & CoJPM76 funds$45.4B
Visa Inc-Class A SharesV76 funds$41.2B
Microsoft CorpMSFT75 funds$182.0B
Nvidia CorpNVDA74 funds$286.0B
Eli Lilly & CoLLY74 funds$61.3B
Apple IncAAPL73 funds$207.6B
Amazon.com IncAMZN73 funds$141.5B
Broadcom IncAVGO73 funds$116.4B
Tesla IncTSLA73 funds$47.6B
Johnson & JohnsonJNJ73 funds$32.3B
Alphabet Inc-CL AGOOGL72 funds$123.9B
Meta Platforms Inc-Class AMETA72 funds$76.6B

Ranked by how many of OSBC's tracked holders also hold each name. The last column is those co-holders' combined reported position in that name, not in OSBC.

Insider activity (Form 4)

Full insider page →
Buys · 180d
$502
1 insider
Sells · 180d
$5.5M
5 insiders
Net · 180d
-$5.5M
13 open-market transactions
DateInsiderRoleActionSharesValue
Sep 8, 2026McLean Hugh HDirectorSell (S)25K$641K
Sep 4, 2026Collins Gary SVICE CHAIRMAN, DirectorSell (S)5K$129K
Sep 3, 2026McLean Hugh HDirectorSell (S)25K$643K
Sep 2, 2026Campbell Darin PatrickPresident, Powersports Lending, DirectorSell (S)24K$613K
Aug 12, 2026Eccher JamesCHAIRMAN AND CEO, DirectorSell (S)19K$495K
Aug 11, 2026Eccher JamesCHAIRMAN AND CEO, DirectorSell (S)56K$1.4M
May 22, 2026Collins Gary SVICE CHAIRMAN, DirectorSell (S)5K$108K
May 21, 2026Collins Gary SVICE CHAIRMAN, DirectorSell (S)10K$211K
May 11, 2026Pilmer DonaldEVPSell (S)25K$519K
May 11, 2026Lyons Billy J Jr.DirectorBuy (P)24$502
May 8, 2026Collins Gary SVICE CHAIRMAN, DirectorSell (S)
2 lots, same day
15K$319K
Mar 20, 2026Collins Gary SVICE CHAIRMAN, DirectorSell (S)22K$429K

One row per insider, day and transaction code; shares and value are summed across the lots. Every lot is on the full insider page and in the filing.

Do institutions, insiders and Congress agree?

Mixed signals

Where institutional funds (13F), corporate insiders (Form 4) and US House members (STOCK Act) are buying or selling the same name in the same window. Green is buying, red is selling.

SEC EDGAR 13F + Form 4 + US House STOCK Act{ }get_ticker_confluence · API & MCP

Signals by source

Insiders and Congress: last 180 days. Funds: latest 13F, top 100 holders incl. passive

SourceBuyingSellingNet
13F funds
Top 100 holders by value, passive included; the hero counts active managers only
4638
Insiders
Form 4 open-market
15-$5.5M
US House
STOCK Act trades
00$0
Sector rotation
OSBC is in Financials, which smart money is rotating OUT OF
$31.5B

Capital Rotation reports where institutional capital disclosed rotating, as of the latest public SEC 13F filings. It is data, not investment advice, a recommendation, or a prediction. Filings lag about 45 days and cover long US equity positions only. Past disclosed flows do not indicate future prices. Do your own research; consult a licensed advisor.

Institutional ownership over time

66 tracked filers in Q2 2026 filingsstill filing
082164Q3 2024Q1 2025Q3 2025Q1 2026Q2 2026
tracked filers holding their reported valueQ2 2026 filings so far: $212.0M
Each bar counts tracked filers with a position in that quarter's filings, so the newest bar excludes filers still on an earlier quarter. Arkolith's tracked universe has grown over this window; part of any long-run rise is coverage, not new buyers.

Recent filings

15 most recent

Keep exploring

Connected entities for OSBC

Browse more

Build

Ask your agent what changed in OSBC

This stock page is the public Follow view. For one current, evidence-backed answer, use capital_change_brief through REST or MCP. It compares tracked 13F changes with qualifying Form 4 activity and cites the SEC evidence.

Copy-paste
curl -H "Authorization: Bearer YOUR_API_KEY" \
  "https://arkolith.com/api/v1/stocks/OSBC/capital-change-brief"
Ask your agent
Use Arkolith's capital_change_brief for OSBC.
Tell me what changed, whether insider activity
corroborates it, and cite the SEC evidence.

13F holdings + Form 4 insider transactions + end-of-day price history + the live filing stream, joined for OSBC. Filings are public domain, sourced to SEC EDGAR; price series derived from end-of-day closes.