Jane Street’s Old Second Bancorp OSBC Stock Holding History

Jane Street’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	–	Sell	-51,428	Closed	-$1.04M	–	12700
2026 Q1	$1.04M	Buy	+51,428	New	+$1.03M	﹤0.01%	6422
2025 Q4	–	Sell	-22,309	Closed	-$386K	–	12026
2025 Q3	$386K	Sell	22,309 -18,277	-45%	-$329K	﹤0.01%	8392
2025 Q2	$720K	Sell	40,586 -42,231	-51%	-$689K	﹤0.01%	6249
2025 Q1	$1.38M	Buy	+82,817	New	+$1.48M	﹤0.01%	4984
2024 Q4	–	Sell	-62,398	Closed	-$973K	–	10239
2024 Q3	$973K	Buy	62,398 +12,785	+26%	+$206K	﹤0.01%	5947
2024 Q2	$735K	Buy	+49,613	New	+$698K	﹤0.01%	6358
2024 Q1	–	Sell	-34,561	Closed	-$534K	–	9845
2023 Q4	$534K	Buy	+34,561	New	+$500K	﹤0.01%	6650
2023 Q1	–	Sell	-13,479	Closed	-$216K	–	9683
2022 Q4	$216K	Buy	+13,479	New	+$215K	﹤0.01%	7549
2021 Q3	–	Sell	-28,038	Closed	-$348K	–	10507
2021 Q2	$348K	Buy	+28,038	New	+$375K	﹤0.01%	7905

Other funds holding OSBC

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

DAM

Davis Asset Management Sausalito, California $3.95B AUM 11.79% 1-Year Est. Return

American Century Companies Kansas City, Missouri $226B AUM 44.75% 1-Year Est. Return

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, Massachusetts $113B AUM 38.87% 1-Year Est. Return

Geode Capital Management Boston, Massachusetts $1.88T AUM 44.46% 1-Year Est. Return

Jane Street's OSBC Position: Q2 2026 in Review

Jane Street sold out of Old Second Bancorp (OSBC) in Q2 2026, closing a stake of 51,428 shares — an estimated $1.04M sold.

Jane Street first reported a position in OSBC in Q2 2021 and held it in 9 quarters. The position peaked at $1.38M in Q1 2025. 184 funds tracked by Wall St. Rank hold OSBC as of Q2 2026.

Jane Street reported no remaining Old Second Bancorp position as of Q2 2026 after selling out during the quarter.
Jane Street sold 51,428 Old Second Bancorp shares in Q2 2026, an estimated $1.04M.
Jane Street first reported a position in Old Second Bancorp in Q2 2021 and held it in 9 quarters.
Jane Street's Old Second Bancorp position peaked at $1.38M in Q1 2025.
184 funds tracked by Wall St. Rank held Old Second Bancorp as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.