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CenterBook Partners’s Old Second Bancorp OSBC Stock Holding History

CenterBook Partners’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
2026
Q1 		$271K Sell
13,425
-16,463
-55% -$330K 0.01% 579
2025
Q4 		$583K Sell
29,888
-15,909
-35% -$297K 0.03% 468
2025
Q3 		$792K Buy
+45,797
New +$825K 0.04% 417

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

CenterBook Partners's OSBC Position: Q1 2026 in Review

CenterBook Partners reduced its Old Second Bancorp (OSBC) stake by 55% in Q1 2026, selling an estimated $330K and leaving 13,425 shares worth $271K. The position accounts for 0.01% of the portfolio, ranked #579.

CenterBook Partners first reported a position in OSBC in Q3 2025 and has held it in 3 quarters since. The position peaked at $792K in Q3 2025. 188 funds tracked by Wall St. Rank hold OSBC as of Q1 2026.

  • CenterBook Partners held 13,425 shares of Old Second Bancorp worth $271K as of Q1 2026.
  • CenterBook Partners sold 16,463 Old Second Bancorp shares in Q1 2026, an estimated $330K.
  • Old Second Bancorp made up 0.01% of CenterBook Partners's portfolio in Q1 2026, its #579 holding.
  • CenterBook Partners first reported a position in Old Second Bancorp in Q3 2025 and has held it in 3 quarters since.
  • CenterBook Partners's Old Second Bancorp position peaked at $792K in Q3 2025.
  • 188 funds tracked by Wall St. Rank held Old Second Bancorp as of Q1 2026.

Based on CenterBook Partners's 13F filing for Q1 2026, filed 5 May 2026.