Dynamic Technology Lab’s Old Second Bancorp OSBC Stock Holding History

Dynamic Technology Lab’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 Q4	–	Sell	-41,951	Closed	-$725K	–	997
2025 Q3	$725K	Buy	+41,951	New	+$755K	0.12%	280
2025 Q2	–	Sell	-40,141	Closed	-$668K	–	1249
2025 Q1	$668K	Buy	+40,141	New	+$719K	0.1%	354
2020 Q3	–	Sell	-11,944	Closed	-$93K	–	1245
2020 Q2	$93K	Sell	11,944 -1,506	-11%	-$11.1K	0.01%	893
2020 Q1	$93K	Buy	+13,450	New	+$148K	0.02%	899
2019 Q2	–	Sell	-11,614	Closed	-$146K	–	1202
2019 Q1	$146K	Buy	+11,614	New	+$161K	0.02%	868
2018 Q1	–	Sell	-25,010	Closed	-$341K	–	1269
2017 Q4	$341K	Buy	+25,010	New	+$332K	0.06%	633
2015 Q4	–	Sell	-10,817	Closed	-$67K	–	1048
2015 Q3	$67K	Buy	+10,817	New	+$68.4K	0.02%	760

Other funds holding OSBC

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return

FCM

FJ Capital Management Mclean, Virginia $888M AUM 18.97% 1-Year Est. Return

DAM

Davis Asset Management Sausalito, California $3.46B AUM 9.77% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

American Century Companies Kansas City, Missouri $194B AUM 35% 1-Year Est. Return

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

Goldman Sachs New York $871B AUM 31.28% 1-Year Est. Return

Dynamic Technology Lab's OSBC Position: Q4 2025 in Review

Dynamic Technology Lab sold out of Old Second Bancorp (OSBC) in Q4 2025, closing a stake of 41,951 shares — an estimated $725K sold.

Dynamic Technology Lab first reported a position in OSBC in Q3 2015 and held it in 7 quarters. The position peaked at $725K in Q3 2025. 185 funds tracked by Wall St. Rank hold OSBC as of Q4 2025.

Dynamic Technology Lab reported no remaining Old Second Bancorp position as of Q4 2025 after selling out during the quarter.
Dynamic Technology Lab sold 41,951 Old Second Bancorp shares in Q4 2025, an estimated $725K.
Dynamic Technology Lab first reported a position in Old Second Bancorp in Q3 2015 and held it in 7 quarters.
Dynamic Technology Lab's Old Second Bancorp position peaked at $725K in Q3 2025.
185 funds tracked by Wall St. Rank held Old Second Bancorp as of Q4 2025.

Based on Dynamic Technology Lab's 13F filing for Q4 2025, filed 13 Feb 2026.