Ticker · CUSIP 680277100

OSBC

OLD SECOND BANCORP INC ILL

Financial Services·Banks - Regional

···Share

Holders (tracked)

Combined shares

2,080,891

Combined value

$40.58M

Last close

$21.93

Quarter

2025Q4

Price is +12.5% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$21.93+7.36 (+50.56%)H $21.93 · L $14.47 · Avg Vol 302K

Tracked holders · last 8 quarters

-1 vs previous quarter over the last 8.

SEC event timeline

19 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−10,275 shares · 2025Q4
Position
D.E. Shaw & Co. exited2026-02-17
−12,166 shares · 2025Q4
Position
Two Sigma Investments trimmed2026-02-17
−155,192 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) opened position2026-02-17
+313,560 shares · 2025Q4
Position
Steve Cohen (Point72) exited2026-02-17
−47,672 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+2,019 shares · 2025Q4
Position
Wellington Management added2026-02-17
+813,600 shares · 2025Q4
Position
AQR Capital Management trimmed2026-02-17
−70,981 shares · 2025Q4
Position
Renaissance Technologies added2026-02-12
+37,200 shares · 2025Q4
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09
−5,220 shares · 2025Q4
Position
T. Rowe Price added2025-11-14
+4,900 shares · 2025Q3
Position
Steve Cohen (Point72) added2025-11-14
+28,335 shares · 2025Q3
Position
Two Sigma Investments added2025-11-14
+66,340 shares · 2025Q3
Position
AQR Capital Management trimmed2025-11-14
−2,827 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) exited2025-11-14
−57,426 shares · 2025Q3
Position
D.E. Shaw & Co. trimmed2025-11-14
−31,710 shares · 2025Q3
Position
Renaissance Technologies trimmed2025-11-13
−33,600 shares · 2025Q3
Position
Mario Gabelli (GAMCO) opened position2025-11-12
+32,721 shares · 2025Q3
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2025-11-12
−5,518 shares · 2025Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for OSBC →

Follow-the-investor returns

If you'd copied each holder of OSBC…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Ken Fisher (Fisher Asset Mgmt)	2022Q4	$15.23	+43.9%	$2.1M
AQR Capital Management	2021Q3	$15.30	+43.3%	$9.8M
Two Sigma Investments	2017Q2	$15.36	+42.8%	$715K
Renaissance Technologies	2016Q1	$15.40	+42.4%	$1.9M
T. Rowe Price	2023Q3	$15.53	+41.2%	$751K
Mario Gabelli (GAMCO)	2025Q3	$17.28	+26.9%	$718K
Ken Griffin (Citadel Advisors)	2017Q4	$17.31	+26.7%	$1.5M
Wellington Management	2016Q1	$18.18	+20.7%	$21.3M
Izzy Englander (Millennium Mgmt)	2016Q1	$19.07	+15.0%	$6.9M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions1

Izzy Englander (Millennium Mgmt)
+313,560
$6.1M

Added to3

Wellington Management
+813,600
$15.9M
Renaissance Technologies
+37,200
$725K
T. Rowe Price
+2,019
$39

Trimmed4

Two Sigma Investments
−155,192
$3.0M
AQR Capital Management
−70,981
$1.4M
Ken Griffin (Citadel Advisors)
−10,275
$200K
Ken Fisher (Fisher Asset Mgmt)
−5,220
$102K

Exited2

Steve Cohen (Point72)
−47,672
$824K
D.E. Shaw & Co.
−12,166
$210K

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	7	3,199,946	$46.4M	—
2022Q2	5	4,162,976	$55.7M	-2
2022Q3	5	4,044,280	$52.8M	—
2022Q4	6	4,288,617	$68.8M	+1
2023Q1	6	4,106,318	$57.7M	—
2023Q2	5	4,135,892	$54.0M	-1
2023Q3	10	3,892,552	$53.0M	+5
2023Q4	10	4,207,093	$65.0M	—
2024Q1	10	4,520,142	$62.6M	—
2024Q2	12	4,875,230	$72.2M	+2
2024Q3	12	1,219,838	$19.0M	—
2024Q4	10	1,374,932	$24.4M	-2
2025Q1	12	1,478,064	$24.6M	+2
2025Q2	10	1,188,970	$21.1M	-2
2025Q3	10	1,216,018	$21.0M	—
2025Q4	9	2,080,891	$40.6M	-1

Who owns OSBC

9 super-investors · 2025Q4

Tracked stake

2.08M

Combined value

$41M

% of shares outstanding

—

shares-out unknown

Quarter action mix

New1Added3Trim4Held1

#	Manager	Shares	Value	% of book	Last action
1	Wellington Management	969.7K	$19M	0.0%	Added+813.6K
2	AQR Capital Management	447.1K	$9M	0.0%	Trim−71.0K
3	Izzy Englander Millennium Mgmt	313.6K	$6M	0.0%	New+313.6K
4	Ken Fisher Fisher Asset Mgmt	97.3K	$2M	0.0%	Trim−5.2K
5	Renaissance Technologies	86.3K	$2M	0.0%	Added+37.2K
6	Ken Griffin Citadel Advisors	67.3K	$1M	0.0%	Trim−10.3K
7	T. Rowe Price	34.3K	$669K	0.0%	Added+2.0K
8	Mario Gabelli GAMCO	32.7K	$638K	0.0%	Held
9	Two Sigma Investments	32.6K	$636K	0.0%	Trim−155.2K

Recent moves

20 transactions

TRIMAQR Capital Management
−70,981 · 2025Q4
SOLDD.E. Shaw & Co.
−12,166 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−10,275 · 2025Q4
ADDT. Rowe Price
+2,019 · 2025Q4
SOLDSteve Cohen (Point72)
−47,672 · 2025Q4
NEWIzzy Englander (Millennium Mgmt)
+313,560 · 2025Q4
TRIMTwo Sigma Investments
−155,192 · 2025Q4
ADDWellington Management
+813,600 · 2025Q4
ADDRenaissance Technologies
+37,200 · 2025Q4
TRIMKen Fisher (Fisher Asset Mgmt)
−5,220 · 2025Q4
TRIMD.E. Shaw & Co.
−31,710 · 2025Q3
TRIMAQR Capital Management
−2,827 · 2025Q3
SOLDIzzy Englander (Millennium Mgmt)
−57,426 · 2025Q3
ADDSteve Cohen (Point72)
+28,335 · 2025Q3
ADDTwo Sigma Investments
+66,340 · 2025Q3
ADDT. Rowe Price
+4,900 · 2025Q3
TRIMRenaissance Technologies
−33,600 · 2025Q3
TRIMKen Fisher (Fisher Asset Mgmt)
−5,518 · 2025Q3
NEWMario Gabelli (GAMCO)
+32,721 · 2025Q3
ADDSteve Cohen (Point72)
+6,615 · 2025Q2

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