Security key
023939101
- Security type / class
- Equity / COMM
- Total 13F shares
- 201,987,607
- Total 13F value
- $5,267,783,544
- Share change
- +8,016,739
- Put/Call ratio
- 48%
- SEC-reported price per share
- $26.08
- Number of holders
- 484
- Value change
- +$195,815,948
- Number of buys
- 212
- Number of sells
- 212
- Shares outstanding
- 244,244,612
Holder snapshot
7 signals
Open additional details 1 more signal available
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q1 2026
Institutions
484
Top holders
10
AMTM full security history
Ownership snapshot
Full 13F holder table
Amentum Holdings, Inc. SEC filings
Amentum Holdings, Inc. company facts
Broader feeds
Ownership snapshot
Top reported holders of AMTM - Amentum Holdings, Inc. - COMM (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
ASP Manager Corp.
Disclosed value leader
AMERICAN SECURITIES LLC
Comparable rows
3/15
Latest evidence
31 Dec 2025
13D/G
3/4/5
13F
Lead comparable stake: 18%
12 rows are not safely comparable across share classes.
13D/G row: ASP Manager Corp.
Showing 1-6 of 15 holder rows.
Quick read
ASP Manager Corp. leads the comparable SEC ownership view at 18%.
3 of 15 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens ASP Manager Corp.'s linked filing trail.
Comparable ownership
Top 3
ASP Manager Corp.
18%
Alan E. Goldberg
18%
BlackRock, Inc.
6.9%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-6 of 15 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| ASP Manager Corp. |
13D/G
3/4/5
10%+ Owner
|
18%
Reported 13D/G
· 17 Dec 2024
|
$974,005,730
43,893,904 shares
|
$0 | 17 Dec 2024 |
| Alan E. Goldberg |
13D/G
3/4/5
Director, 10%+ Owner
|
18%
Reported 13D/G
· 17 Dec 2024
|
$974,005,730
43,893,904 shares
|
$0 | 17 Dec 2024 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6.9%
Reported 13D/G
· 31 Dec 2024
|
$506,313,859
17,459,099 shares
|
— | 31 Dec 2025 |
| ASP Amentum Investco LP |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$913,300,461
43,893,904 shares
|
— | 17 Dec 2024 |
| Goldberg 2014 LLC |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$817,235,385
45,026,743 shares
|
— | 08 May 2025 |
| Lindsay Goldberg Employee Co-Inv. IV L.P. |
3/4/5
10%+ Owner
|
—
denominator unverified
|
$817,235,385
45,026,743 shares
|
— | 08 May 2025 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
13F holder rows
Institutional holders as of Q1 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
484
Shares
201,987,607
Rows available
484
| Investor | Option | Weight % | Change % | SEC-reported value | * Price | Shares | Share Change | Activity | Report Period |
|---|
* SEC-reported price is the security price as of the portfolio date and can indicate the last known price at which the security was still held. The marker flags a reported price that did not pass the local price check.
Compare Q1 2026 vs Q1 2026 Across Filers
Q1 2026 holders
484
Q1 2026 holders
484
Holder diff
0
| Investor | Q1 2026 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q1 2026 value | Q1 2026 value | Value change | Value Chg % |
|---|