Citadel Advisors
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Citadel Advisors’s Old Second Bancorp OSBC Stock Holding History

Citadel Advisors’s Portfolio OSBC Stock Details OSBC Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2025
Q2 		– Sell
-3,000
Closed -$49.9K – 14363
2025
Q1 		$49.9K Buy
3,000
+900
+43% +$16.1K ﹤0.01% 12317
2024
Q4 		$37.3K Sell
2,100
-2,000
-49% -$34.8K ﹤0.01% 12670
2024
Q3 		$63.9K Buy
4,100
+2,100
+105% +$33.8K ﹤0.01% 11646
2024
Q2 		$29.6K Sell
2,000
-1,700
-46% -$23.9K ﹤0.01% 12287
2024
Q1 		$51.2K Buy
3,700
+200
+6% +$2.79K ﹤0.01% 12156
2023
Q4 		$54K Sell
3,500
-1,300
-27% -$18.8K ﹤0.01% 11707
2023
Q3 		$65.3K Buy
+4,800
New +$70.1K ﹤0.01% 11416

Other funds holding OSBC

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
DAM
Davis Asset Management Sausalito, California $3.46B AUM 9.77% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return
FCM
FJ Capital Management Mclean, Virginia $888M AUM 18.97% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $95.5B AUM 28.4% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.61T AUM 30.72% 1-Year Est. Return

Citadel Advisors's OSBC Position: Q1 2026 in Review

Citadel Advisors reduced its Old Second Bancorp (OSBC) stake by 11% in Q1 2026, selling an estimated $145K and leaving 60,065 shares worth $1.21M. The position accounts for ﹤0.01% of the portfolio, ranked #7232.

Citadel Advisors first reported a position in OSBC in Q1 2014 and has held it in 31 quarters since. The position peaked at $3.71M in Q4 2024. 188 funds tracked by Wall St. Rank hold OSBC as of Q1 2026.

  • Citadel Advisors held 60,065 shares of Old Second Bancorp worth $1.21M as of Q1 2026.
  • Citadel Advisors sold 7,248 Old Second Bancorp shares in Q1 2026, an estimated $145K.
  • Old Second Bancorp made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #7232 holding.
  • Citadel Advisors first reported a position in Old Second Bancorp in Q1 2014 and has held it in 31 quarters since.
  • Citadel Advisors's Old Second Bancorp position peaked at $3.71M in Q4 2024.
  • 188 funds tracked by Wall St. Rank held Old Second Bancorp as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.