AMERICAN SECURITIES LLC
Broker-DealerPosition in AMTM — Amentum Holdings, Inc.
CIK 1475483
NEW YORK, NY
Position in AMTM
as of Mar 31, 2026
· filed May 14, 2026
Position Value
$1,174,297,457
-$131,478,090 QoQ
Shares Held
45,026,743
0.0% QoQ
Ownership
18.4%
of shares outstanding
% of Portfolio
29.88%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Dec 2024
6 quarters on record
Voting authority
Sole 100%
Shared 0%
None 0%
Common Shares in AMTM Over Time
Shares Held
Position Value (USD)
Position in Specialty Business Services
Industrials · as of Mar 31, 2026AMERICAN SECURITIES LLC holds $1,174,297,457 across 1 Specialty Business Services name. AMTM ranks #1 (100.0% of the industry book) .
| # | Ticker | Company | Shares | Value (USD) | Open |
|---|---|---|---|---|---|
| 1 | AMTM |
Amentum Holdings, Inc.
This page
|
45,026,743 | $1,174,297,457 |
All Filings in AMTM
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6 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $1,174,297,457 | 45,026,743 | Shares | Sole | 2026-05-14 | |
| 2025-12-31 | $1,305,775,547 | 45,026,743 | Shares | Sole | 2026-02-12 | |
| 2025-09-30 | $1,078,390,494 | 45,026,743 | Shares | Sole | 2025-11-07 | |
| 2025-06-30 | $1,063,081,402 | 45,026,743 | Shares | Sole | 2025-07-29 | |
| 2025-03-31 | $798,869,052 | 43,893,904 | Shares | Sole | 2025-05-12 | |
| 2024-12-31 | $923,088,801 | 43,893,904 | Shares | Sole | 2025-02-14 | |
| No filing history on record for this holder in this stock. | ||||||