SEC 13F Intelligence

Brightline Capital Management, LLC / AMTM

Brightline Capital Management, LLC’s Amentum Holdings Inc Position

Does Brightline Capital Management, LLC own Amentum Holdings Inc (AMTM)? Yes — 1.40M shares worth $36M (+10.77% of its 13F portfolio) as of Q1 2026, up from 1.39M shares the prior filed quarter.

Position Value
$36M
Q1 2026
Shares
1.40M
% of Portfolio
+10.77%
Quarters Held
4
currently held

Position History AMTM

Reported value by quarter
Q2 ’25: $24MQ2 ’25Q3 ’25: $29MQ3 ’25Q4 ’25: $40MQ4 ’25Q1 ’26: $36MQ1 ’26filingsflow.com
QuarterSharesValue% of Portfolio
Q1 20261.40M$36M+10.77%
Q4 20251.39M$40M+16.32%
Q3 20251.20M$29M+11.78%
Q2 20251.00M$24M+10.17%

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