BlackRock
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BlackRock’s Old Second Bancorp OSBC Stock Holding History

BlackRock’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 		$83.2M Sell
4,126,244
-29,662
-0.7% -$595K ﹤0.01% 2222
2025
Q4 		$81M Buy
4,155,906
+338,128
+9% +$6.32M ﹤0.01% 2237
2025
Q3 		$66M Buy
3,817,778
+316,180
+9% +$5.69M ﹤0.01% 2339
2025
Q2 		$62.1M Sell
3,501,598
-78,899
-2% -$1.29M ﹤0.01% 2329
2025
Q1 		$59.6M Buy
3,580,497
+43,040
+1% +$771K ﹤0.01% 2284
2024
Q4 		$62.9M Sell
3,537,457
-142,662
-4% -$2.48M ﹤0.01% 2320
2024
Q3 		$57.4M Buy
3,680,119
+243,305
+7% +$3.91M ﹤0.01% 2392
2024
Q2 		$50.9M Buy
3,436,814
+121,822
+4% +$1.71M ﹤0.01% 2395
2024
Q1 		$45.9M Sell
3,314,992
-188,905
-5% -$2.64M ﹤0.01% 2483
2023
Q4 		$54.1M Buy
3,503,897
+326,223
+10% +$4.72M ﹤0.01% 2425
2023
Q3 		$43.2M Sell
3,177,674
-160,800
-5% -$2.35M ﹤0.01% 2486
2023
Q2 		$43.6M Buy
3,338,474
+21,443
+0.6% +$273K ﹤0.01% 2568
2023
Q1 		$46.6M Buy
3,317,031
+47,163
+1% +$752K ﹤0.01% 2496
2022
Q4 		$52.4M Buy
3,269,868
+158,312
+5% +$2.53M ﹤0.01% 2431
2022
Q3 		$40.6M Sell
3,111,556
-7,253
-0.2% -$102K ﹤0.01% 2605
2022
Q2 		$41.7M Buy
3,118,809
+945,084
+43% +$13.5M ﹤0.01% 2612
2022
Q1 		$31.5M Buy
2,173,725
+179,424
+9% +$2.51M ﹤0.01% 2879
2021
Q4 		$25.1M Sell
1,994,301
-21,858
-1% -$287K ﹤0.01% 3143
2021
Q3 		$26.3M Sell
2,016,159
-119,407
-6% -$1.43M ﹤0.01% 3101
2021
Q2 		$26.5M Sell
2,135,566
-200,465
-9% -$2.68M ﹤0.01% 3127
2021
Q1 		$30.9M Buy
2,336,031
+171,250
+8% +$2.02M ﹤0.01% 2929
2020
Q4 		$21.9M Buy
2,164,781
+79,006
+4% +$750K ﹤0.01% 2959
2020
Q3 		$15.6M Sell
2,085,775
-57,627
-3% -$461K ﹤0.01% 3005
2020
Q2 		$16.7M Buy
2,143,402
+81,975
+4% +$607K ﹤0.01% 2898
2020
Q1 		$14.2M Buy
2,061,427
+5,133
+0.2% +$56.5K ﹤0.01% 2794
2019
Q4 		$27.7M Buy
2,056,294
+548
+0% +$6.84K ﹤0.01% 2700
2019
Q3 		$25.1M Buy
2,055,746
+4,824
+0.2% +$59.8K ﹤0.01% 2686
2019
Q2 		$26.2M Sell
2,050,922
-13,184
-0.6% -$169K ﹤0.01% 2695
2019
Q1 		$26M Buy
2,064,106
+12,520
+0.6% +$173K ﹤0.01% 2617
2018
Q4 		$26.7M Buy
2,051,586
+39,292
+2% +$556K ﹤0.01% 2572
2018
Q3 		$31.1M Buy
2,012,294
+35,505
+2% +$541K ﹤0.01% 2635
2018
Q2 		$28.5M Buy
1,976,789
+69,773
+4% +$1.02M ﹤0.01% 2665
2018
Q1 		$26.5M Sell
1,907,016
-33,758
-2% -$480K ﹤0.01% 2612
2017
Q4 		$26.5M Buy
1,940,774
+28,031
+1% +$372K ﹤0.01% 2636
2017
Q3 		$25.7M Buy
1,912,743
+28,240
+1% +$332K ﹤0.01% 2661
2017
Q2 		$21.8M Buy
1,884,503
+58,451
+3% +$680K ﹤0.01% 2744
2017
Q1 		$20.5M Buy
1,826,052
+1,821,170
+37,304% +$19.6M ﹤0.01% 2747
2016
Q4 		$54K Hold
4,882
– – ﹤0.01% 2892
2016
Q3 		$41K Hold
4,882
– – ﹤0.01% 3062
2016
Q2 		$33K Buy
4,882
+3,853
+374% +$27.3K ﹤0.01% 3106
2016
Q1 		$7K Buy
+1,029
New +$7.09K ﹤0.01% 3280

Other funds holding OSBC

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
KCM
Kennedy Capital Management St Louis, Missouri $4.72B AUM 36.69% 1-Year Est. Return

BlackRock's OSBC Position: Q1 2026 in Review

BlackRock reduced its Old Second Bancorp (OSBC) stake by 0.71% in Q1 2026, selling an estimated $595K and leaving 4,126,244 shares worth $83.2M. The position accounts for ﹤0.01% of the portfolio, ranked #2222.

BlackRock first reported a position in OSBC in Q1 2016 and has held it in 41 quarters since. 188 funds tracked by Wall St. Rank hold OSBC as of Q1 2026.

  • BlackRock held 4,126,244 shares of Old Second Bancorp worth $83.2M as of Q1 2026.
  • BlackRock sold 29,662 Old Second Bancorp shares in Q1 2026, an estimated $595K.
  • Old Second Bancorp made up ﹤0.01% of BlackRock's portfolio in Q1 2026, its #2222 holding.
  • BlackRock first reported a position in Old Second Bancorp in Q1 2016 and has held it in 41 quarters since.
  • 188 funds tracked by Wall St. Rank held Old Second Bancorp as of Q1 2026.

Based on BlackRock's 13F filing for Q1 2026, filed 13 May 2026.