AMENTUM HOLDINGS INC

$AMTM
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Smart money positioned

14 of the Top-200 alpha managers hold $AMTM as of the latest 13F snapshot.

13F holders
484
Insider buys · 90d
0
Congress · 90d
0

Smart Money · top-200 alpha cohort

14 holders · Q1 2026

$AMTM is held by 14 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.00% to 10.77%, with an average of 1.05% of portfolio. Largest holder: Brightline Capital Management, LLC at 10.77%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.

01
Brightline Capital Management, LLC
10.77% NEW
α +18.9pts
02
Cacti Asset Management LLC
1.40% NEW
α +12.7pts
03
Hel Ved Capital Management Ltd
0.74% NEW
α +36.9pts
04
Intrinsic Value Partners, LLC
0.28% held
α +13.8pts
05
Caption Management, LLC
0.22% held
α +15.5pts

Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.

Institutional holders

Top 10 of 484 · Source: 13F-HR
01
B. Riley Wealth Advisors, Inc.
29.88% of portfolio
45,026,743 sh
02
Bahl & Gaynor Inc.
0.09% of portfolio
23,918,940 sh
03
Primecap Management CO
0.27% of portfolio
12,126,927 sh
04
First Financial Bankshares Inc.
0.25% of portfolio
12,085,294 sh
05
BHK Investment Advisors, LLC
1.07% of portfolio
9,064,278 sh
06
Spahn Wealth & Retirement LLC
8.97% of portfolio
6,213,600 sh
07
Axa S.a.
—
5,079,041 sh
08
State Street
—
5,061,620 sh
09
Cambridge Capital Management, LLC
1.32% of portfolio
4,930,210 sh
10
Glynn Capital Management LLC
0.06% of portfolio
4,680,000 sh
See all 484 13F holders · Pro →

Insider activity · last 90 days

2 transactions · 2 filers
18 Feb 2025
Loughran Barbara —
▲ BOUGHT
4,600
$21.23
P
12 Feb 2025
Demetriou Steven J. —
▲ BOUGHT
100,000
$20.81
P

Transaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.

Congress trades · last 90 days

1 disclosures · STOCK Act
Bill Keating
House · Massachusetts · Traded Oct 31
SOLD
$AMTMAMENTUM HOLDINGS INC
$1K–$15K
Nov 6STOCK

Source data: SEC EDGAR · 13F-HR · Form 4 · U.S. House Clerk PTR (disclosures-clerk.house.gov) · Senate eFD (senate.gov) · Last refreshed 07:14 UTC.