Simplex Trading, LLC

SEC CIK: 0001488542
Latest filing: Aug 12, 2026

SEC filings (opens in a new tab)

AMTM holding history

Amentum Holdings, Inc. in every 13F filed by Simplex Trading, LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

AMTM overview All 13F holders of AMTM Full Q2 2026 holdings

Shares (Q2 2026): 17,003
Value: $351.5K
% of portfolio: <0.1%
Quarters held: 3; Since Q4 2024

Holdings of AMTM by Simplex Trading, LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q2 2026	17,003	$351.5K	<0.1%	+17,003	New	Holders
Q2 2025	0	$0	0.0%	−52,827−100.0%	Sold out	Holders
Q1 2025	52,827	$961.0K	<0.1%	−167,154−76.0%	Reduced	Holders
Q4 2024	219,981	$4.63M	0.1%	+219,981	New	Holders