Mariner
OSBC icon

Mariner’s Old Second Bancorp OSBC Stock Holding History

Mariner’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
Q2 		$5.25M Buy
225,303
+207,236
+1,147% +$4.43M 0.01% 1010
2026
Q1 		$364K Sell
18,067
-2,934
-14% -$58.9K ﹤0.01% 2708
2025
Q4 		$410K Buy
21,001
+4,621
+28% +$86.3K ﹤0.01% 2594
2025
Q3 		$283K Buy
16,380
+4,600
+39% +$82.8K ﹤0.01% 2860
2025
Q2 		$209K Buy
+11,780
New +$192K ﹤0.01% 3020
2023
Q2 		– Sell
-50,891
Closed -$715K – 2895
2023
Q1 		$715K Sell
50,891
-35
-0.1% -$558 ﹤0.01% 1464
2022
Q4 		$817K Buy
50,926
+1,116
+2% +$17.8K ﹤0.01% 1338
2022
Q3 		$650K Buy
49,810
+6,525
+15% +$91.6K ﹤0.01% 1265
2022
Q2 		$579K Buy
43,285
+325
+0.8% +$4.64K ﹤0.01% 1078
2022
Q1 		$623K Buy
42,960
+4,945
+13% +$69.3K ﹤0.01% 1066
2021
Q4 		$479K Hold
38,015
– – ﹤0.01% 1017
2021
Q3 		$496K Buy
38,015
+171
+0.5% +$2.05K ﹤0.01% 852
2021
Q2 		$469K Hold
37,844
– – ﹤0.01% 805
2021
Q1 		$500K Hold
37,844
– – ﹤0.01% 741
2020
Q4 		$382K Buy
37,844
+2,400
+7% +$22.8K ﹤0.01% 716
2020
Q3 		$266K Buy
35,444
+24
+0.1% +$192 ﹤0.01% 688
2020
Q2 		$276K Buy
35,420
+298
+0.8% +$2.21K ﹤0.01% 691
2020
Q1 		$243K Buy
+35,122
New +$386K ﹤0.01% 677

Other funds holding OSBC

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
DAM
Davis Asset Management Sausalito, California $3.95B AUM 11.79% 1-Year Est. Return
American Century Companies
American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return
FCM
FJ Capital Management Mclean, Virginia $770M AUM 28.42% 1-Year Est. Return
Boston Partners
Boston Partners Boston, Massachusetts $113B AUM 38.87% 1-Year Est. Return
Geode Capital Management
Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Mariner's OSBC Position: Q2 2026 in Review

Mariner increased its Old Second Bancorp (OSBC) stake by 1,147% in Q2 2026, buying an estimated $4.43M and bringing the position to 225,303 shares worth $5.25M. The position accounts for 0.01% of the portfolio, ranked #1010.

Mariner first reported a position in OSBC in Q1 2020 and has held it in 18 quarters since. 184 funds tracked by Wall St. Rank hold OSBC as of Q2 2026.

  • Mariner held 225,303 shares of Old Second Bancorp worth $5.25M as of Q2 2026.
  • Mariner bought 207,236 Old Second Bancorp shares in Q2 2026, an estimated $4.43M.
  • Old Second Bancorp made up 0.01% of Mariner's portfolio in Q2 2026, its #1010 holding.
  • Mariner first reported a position in Old Second Bancorp in Q1 2020 and has held it in 18 quarters since.
  • 184 funds tracked by Wall St. Rank held Old Second Bancorp as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.