Security key
023939101
- Security type / class
- Equity / Common Stock
- Total 13F shares
- 201,968,172
- Total 13F value
- $5,267,276,251
- Share change
- +8,006,905
- Put/Call ratio
- 48%
- SEC-reported price per share
- $26.08
- Number of holders
- 483
- Value change
- +$195,559,726
- Number of buys
- 211
- Number of sells
- 211
- Shares outstanding
- 242,870,683
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
483
Top holders
10
AMTM full security history
Ownership snapshot
Full 13F holder table
Newer quarter: Q2 2026
Previous quarter: Q4 2025
Amentum Holdings, Inc. SEC filings
Amentum Holdings, Inc. company facts
Broader feeds
Reporting periods
Holder history for CUSIP 023939101
Recent filing periods:
Ownership snapshot
Top reported holders of AMTM - Amentum Holdings, Inc. - Common Stock (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
15/15
Latest evidence
06 Feb 2026
13D/G
3/4/5
13F
Lead comparable stake: 18%
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%.
15 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 5
ASP Manager Corp.
18%
Alan E. Goldberg
18%
BlackRock, Inc.
6.9%
Goldberg 2014 LLC
19%
Lindsay Goldberg Employee Co-Inv....
19%
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%
|
$974,005,730
43,893,904 shares
|
$0 | 17 Dec 2024 |
| Alan E. Goldberg |
13D/G
3/4/5
Director, 10%+ Owner
|
18%
|
$974,005,730
43,893,904 shares
|
$0 | 17 Dec 2024 |
| BlackRock, Inc. |
13F
13D/G
Company
|
6.9%
from 13D/G
|
$506,313,859
17,459,099 shares
|
— | 31 Dec 2025 |
| Goldberg 2014 LLC |
3/4/5
10%+ Owner
|
19%
|
$817,235,385
45,026,743 shares
|
— | 08 May 2025 |
| Lindsay Goldberg Employee Co-Inv. IV L.P. |
3/4/5
10%+ Owner
|
19%
|
$817,235,385
45,026,743 shares
|
— | 08 May 2025 |
| Steven J. Demetriou |
3/4/5
Executive Chair, Director
|
0.35%
|
$30,888,441
861,218 shares
mixed-class rows
|
— | 17 Nov 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
483
Shares
201,968,172
Rows available
483
| 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 Q4 2025 Across Filers
Q4 2025 holders
482
Q1 2026 holders
483
Holder diff
1
| Investor | Q4 2025 Shares | Q1 2026 Shares | Share Diff | Share Chg % | Q4 2025 value | Q1 2026 value | Value change | Value Chg % |
|---|
Trend: ostatnie 8 kwartałów (+ wybrane okresy porównania).
Quarterly Holders Trend
Quarterly Value Trend
Quarterly Shares Trend