Jane Street’s Middlefield Banc Corp MBCN Stock Holding History

Jane Street’s Portfolio MBCN Stock Details MBCN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-15,267	Closed	-$527K	–	12410
2025 Q4	$527K	Buy	15,267 +2,096	+16%	+$69.6K	﹤0.01%	7553
2025 Q3	$395K	Buy	13,171 +5,098	+63%	+$153K	﹤0.01%	8347
2025 Q2	$243K	Buy	+8,073	New	+$225K	﹤0.01%	8208
2023 Q2	–	Sell	-16,954	Closed	-$475K	–	9212
2023 Q1	$475K	Buy	+16,954	New	+$471K	﹤0.01%	6407

Other funds holding MBCN

IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

Jane Street's MBCN Position: Q1 2026 in Review

Jane Street sold out of Middlefield Banc Corp (MBCN) in Q1 2026, closing a stake of 15,267 shares — an estimated $527K sold.

Jane Street first reported a position in MBCN in Q1 2023 and held it in 4 quarters. The position peaked at $527K in Q4 2025. 1 fund tracked by Wall St. Rank holds MBCN as of Q1 2026.

Jane Street reported no remaining Middlefield Banc Corp position as of Q1 2026 after selling out during the quarter.
Jane Street sold 15,267 Middlefield Banc Corp shares in Q1 2026, an estimated $527K.
Jane Street first reported a position in Middlefield Banc Corp in Q1 2023 and held it in 4 quarters.
Jane Street's Middlefield Banc Corp position peaked at $527K in Q4 2025.
1 fund tracked by Wall St. Rank held Middlefield Banc Corp as of Q1 2026.

Based on Jane Street's 13F filing for Q1 2026, filed 12 May 2026.