Mariner’s Costamare Bulkers Holdings CMDB Stock Holding History

Mariner’s Portfolio CMDB Stock Details CMDB Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2026 Q1	–	Sell	-12,820	Closed	-$198K	–	3901
2025 Q4	$198K	Hold	12,820	–	–	﹤0.01%	3176
2025 Q3	$184K	Buy	+12,820	New	+$132K	﹤0.01%	3202

Other funds holding CMDB

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

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

Ameriprise Minneapolis, Minnesota $432B AUM 30.22% 1-Year Est. Return

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

OIM

Oceanic Investment Management Douglas, Isle Of Man $118M AUM

Renaissance Technologies New York $63.9B AUM 45.56% 1-Year Est. Return

Morgan Stanley New York $1.66T AUM 25.57% 1-Year Est. Return

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

Qube Research & Technologies (QRT) London, United Kingdom $89.9B AUM 20.22% 1-Year Est. Return

Walleye Capital New York $24B AUM 37.67% 1-Year Est. Return

Mariner's CMDB Position: Q1 2026 in Review

Mariner sold out of Costamare Bulkers Holdings (CMDB) in Q1 2026, closing a stake of 12,820 shares — an estimated $198K sold.

Mariner first reported a position in CMDB in Q3 2025 and held it in 2 quarters. The position peaked at $198K in Q4 2025. 97 funds tracked by Wall St. Rank hold CMDB as of Q1 2026.

Mariner reported no remaining Costamare Bulkers Holdings position as of Q1 2026 after selling out during the quarter.
Mariner sold 12,820 Costamare Bulkers Holdings shares in Q1 2026, an estimated $198K.
Mariner first reported a position in Costamare Bulkers Holdings in Q3 2025 and held it in 2 quarters.
Mariner's Costamare Bulkers Holdings position peaked at $198K in Q4 2025.
97 funds tracked by Wall St. Rank held Costamare Bulkers Holdings as of Q1 2026.

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