OLD Second Bancorp Inc: which funds bought and sold

Institutions that bought and sold OLD Second Bancorp shares in Q2 2026, from the holdings they reported to the SEC on Form 13F for March 31, 2026 and June 30, 2026.

Between March 31, 2026 and June 30, 2026, 97 institutions that filed 13F reports for both quarters added to or opened positions in OLD Second Bancorp, and 66 cut or closed them. Together they added a net 1.1M shares, +2.9% on what they held at the start of the quarter. Active managers and hedge funds on our list were net buyers of 770K shares (+9.9%); index fund managers were net buyers of 312K shares (+2.7%). 19 opened a new position and 20 sold out entirely.

Bought, Q2 2026 97 institutions, 19 of them new holders Sold, Q2 2026 66 institutions, 20 of them sold out

Net change, all compared +1.1M shares (+2.9%)

Net change, active managers +770K shares (+9.9%), 12 bought, 13 sold

Buyers versus sellers

institutions compared, 203

97 bought 40 66 sold

Active managers and hedge funds 12 bought · 13 sold · +770K

Index fund managers 7 bought · 3 sold · +312K

Other institutions 78 bought · 50 sold · +726

Biggest buyers

by change in shares held

Biggest buyers
Institution	Change in shares	Shares June 30, 2026	Value
Congress Asset Management Co Active manager	+339K New position	339K	$7.9M
Citadel Advisors LLC Hedge fund	+244K +406.2%	304K	$7.1M
State Street Corp Index funds	+240K +15.0%	1.8M	$42.9M
Mariner, LLC	+207K +1147.0%	225K	$5.3M
American Century Companies Inc Active manager	+193K +12.1%	1.8M	$41.6M
Blackrock, Inc. Index funds	+172K +4.2%	4.3M	$100M
Franklin Resources Inc Active manager	+171K +194.1%	259K	$6M
Two Sigma Investments, LP Hedge fund	+133K +198.1%	201K	$4.7M
D. E. Shaw & Co., Inc. Hedge fund	+114K New position	114K	$2.7M
Dimensional Fund Advisors LP	+110K +4.6%	2.5M	$58.3M
Vanguard Portfolio Management LLC Index funds	+107K +15.0%	819K	$19.1M
Thrivent Financial For Lutherans	+99K +69.3%	242K	$5.7M
First Trust Advisors LP	+76K +402.9%	94K	$2.2M
Nuveen, LLC	+73K +17.3%	492K	$11.5M
Arrowstreet Capital, Limited Partnership Hedge fund	+70K +49.4%	211K	$4.9M
Geode Capital Management, LLC Index funds	+67K +5.3%	1.3M	$31.5M
Exoduspoint Capital Management, LP Hedge fund	+54K New position	54K	$1.3M
Stieven Capital Advisors, L.P.	+42K +5.4%	815K	$19M
Bank Of America Corp	+41K +12.5%	373K	$8.7M
Morgan Stanley	+40K +14.3%	318K	$7.4M

Biggest buyers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Congress Asset Management Co Active manager	+339K New position	339K	$7.9M
Citadel Advisors LLC Hedge fund	+244K +406.2%	304K	$7.1M
American Century Companies Inc Active manager	+193K +12.1%	1.8M	$41.6M
Franklin Resources Inc Active manager	+171K +194.1%	259K	$6M
Two Sigma Investments, LP Hedge fund	+133K +198.1%	201K	$4.7M
D. E. Shaw & Co., Inc. Hedge fund	+114K New position	114K	$2.7M
Arrowstreet Capital, Limited Partnership Hedge fund	+70K +49.4%	211K	$4.9M
Exoduspoint Capital Management, LP Hedge fund	+54K New position	54K	$1.3M
FMR LLC Active manager	+34K +583.4%	40K	$930,983
Bridgeway Capital Management, LLC Active manager	+15K +3.4%	453K	$10.6M

Biggest sellers

by change in shares held

Biggest sellers
Institution	Change in shares	Shares June 30, 2026	Value
Wellington Management Group LLP Active manager	−313K −36.5%	544K	$12.7M
Northern Trust Corp Index funds	−209K −27.3%	555K	$13M
Jacobs Asset Management, LLC	−150K Sold out	0	—
Jpmorgan Chase & Co	−145K −20.7%	556K	$12.9M
UBS Group AG	−112K −43.2%	147K	$3.4M
Sei Investments Co	−85K −42.1%	118K	$2.7M
Knights Of Columbus Asset Advisors LLC	−74K −56.4%	57K	$1.3M
Vanguard Capital Management LLC Index funds	−72K −3.2%	2.2M	$50.8M
Renaissance Technologies LLC Hedge fund	−69K −76.5%	21K	$494,874
Goldman Sachs Group Inc	−67K −3.9%	1.6M	$37.9M
Bank Of Montreal	−54K −45.7%	64K	$1.5M
Jane Street Group, LLC	−51K Sold out	0	—
Alliancebernstein L.P. Active manager	−49K −7.1%	642K	$12.9M
Fj Capital Management LLC	−45K −3.0%	1.5M	$34.1M
Corient Private Wealth LP	−41K Sold out	0	—
State Of New Jersey Common Pension Fund D	−40K −31.2%	89K	$2.1M
Susquehanna International Group, LLP	−39K Sold out	0	—
Elizabeth Park Capital Advisors, Ltd.	−37K −22.2%	129K	$3M
Y-Intercept (Hong Kong) Ltd	−36K −68.2%	17K	$390,097
Sara-Bay Financial	−33K −35.1%	61K	$1.4M

Biggest sellers, active managers and hedge funds
Institution	Change in shares	Shares June 30, 2026	Value
Wellington Management Group LLP Active manager	−313K −36.5%	544K	$12.7M
Renaissance Technologies LLC Hedge fund	−69K −76.5%	21K	$494,874
Alliancebernstein L.P. Active manager	−49K −7.1%	642K	$12.9M
GAMCO Investors, Inc. Et Al Active manager	−33K Sold out	0	—
Kennedy Capital Management LLC Active manager	−32K −2.5%	1.2M	$28.8M
Millennium Management LLC Hedge fund	−31K Sold out	0	—
Boston Partners Active manager	−29K −2.0%	1.4M	$32.9M
Martingale Asset Management L P Active manager	−26K −29.8%	61K	$1.4M
Centerbook Partners LP Hedge fund	−13K Sold out	0	—
AQR Capital Management LLC Hedge fund	−5,726 −1.5%	386K	$9M

New positions

largest by value

Institution	Shares	Value June 30, 2026
Congress Asset Management CoActive manager	339K	$7.9M
D. E. Shaw & Co., Inc.Hedge fund	114K	$2.7M
Exoduspoint Capital Management, LPHedge fund	54K	$1.3M
Aquatic Capital Management LLC	38K	$879,164
Gsa Capital Partners LLP	35K	$812,000
Sanctuary Advisors, LLC	34K	$790,758
Virtu Financial LLC	12K	$274,000
Voya Investment Management LLC	11K	$248,032
J.W. Cole Advisors, Inc.	11K	$245,062
Choreo, LLC	9,099	$212,199

Sold out

largest by value

Institution	Shares	Value March 31, 2026
Jacobs Asset Management, LLC	150K	$3M
Jane Street Group, LLC	51K	$1M
Corient Private Wealth LP	41K	$825,354
Susquehanna International Group, LLP	39K	$776,825
GAMCO Investors, Inc. Et AlActive manager	33K	$659,655
Millennium Management LLCHedge fund	31K	$634,536
Atom Investors LP	27K	$542,989
Nverses Capital, LLC	21K	$428,258
Assenagon Asset Management S.A.	18K	$360,058
Universal- Beteiligungs- Und Servicegesellschaft Mbh	16K	$318,951

Who holds the shares

13F holdings at June 30, 2026

Institutions reporting: 184
Ten largest holders: 52.2%
Index fund managers: 30.7%
Active managers and hedge funds: 22.0%

Buying and selling by type of institution, March 31, 2026 to June 30, 2026
Type	Bought	Sold	New	Sold out	Net change in shares	Net %
Active managers and hedge funds	12	13	3	3	+770K	+9.9%
Index fund managers	7	3	0	0	+312K	+2.7%
Other institutions	78	50	16	17	+726	0.0%

Active managers and hedge funds: a list we maintain of about 400 well-known stock-picking firms and hedge funds, matched by SEC registration number (CIK) and checked against the filer names each quarter. Index fund managers: the large index houses, such as BlackRock, Vanguard, State Street, Geode and Northern Trust. Every other filer (banks, brokers, wealth managers, pension funds, insurers and firms not on the list) counts as another institution. A firm that files under several SEC registrations appears once for each.

What these filings can and cannot tell you

Form 13F lists the long positions in US-listed shares held by investment managers with more than $100 million in such holdings. Managers file it up to 45 days after each quarter ends, so this page shows what funds held at the end of each quarter, not what they are doing now: a position may have changed since. Short positions, most derivatives and smaller managers are not included, and a cut can mean a fund lost clients or rebalanced rather than a view on OLD Second Bancorp.

Only managers that filed a holdings report for both quarters are compared (203 here). 5 other holders are left out: first-time or late filers, firms that changed their SEC registration, and filings that withheld positions under confidential treatment, any of which would otherwise look like a new position or a sale. Figures are as reported by each manager in the SEC's quarterly 13F data sets; option positions are excluded.

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