SEC 13F Intelligence

Ack Asset Management LLC / MBC

Ack Asset Management LLC’s Masterbrand Inc Position

Does Ack Asset Management LLC own Masterbrand Inc (MBC)? Yes — 3.70M shares worth $31M (+3.84% of its 13F portfolio) as of Q1 2026, up from 2.30M shares the prior filed quarter.

Position Value
$31M
Q1 2026
Shares
3.70M
% of Portfolio
+3.84%
Quarters Held
6
currently held

Position History MBC

Reported value by quarter
Q3 ’24: $12MQ3 ’24Q4 ’24: $22MQ4 ’24Q1 ’25: $17MQ1 ’25Q3 ’25: $30MQ3 ’25Q4 ’25: $25MQ4 ’25Q1 ’26: $31MQ1 ’26filingsflow.com
QuarterSharesValue% of Portfolio
Q1 20263.70M$31M+3.84%
Q4 20252.30M$25M+3.19%
Q3 20252.30M$30M+3.79%
Q1 20251.30M$17M+2.79%
Q4 20241.48M$22M+2.89%
Q3 2024650.0K$12M+1.49%

Common-stock position only; options are excluded. Quarters where the fund filed no 13F or reported no position are absent. See Ack Asset Management LLC’s full portfolio or all institutional holders of MBC.