Security key
023939101
- Security type / class
- Equity / COMM
- Total 13F shares
- 2,025,684
- Total 13F value
- $36,792,759
- Share change
- -1,328,092
- SEC-reported price per share
- $18.12
- Number of holders
- 45
- Value change
- -$24,072,967
- Number of buys
- 14
- Number of sells
- 28
- Shares outstanding
- 244,244,612
Holder snapshot
6 signals
Security identity
Names, identifiers, and filing context for this profile.
1 source field
Report period
Q3 2026
Institutions
45
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
ASP Manager Corp.
Comparable rows
15/15
Latest evidence
30 Jun 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%
Invesco Ltd.
10%
BlackRock, Inc.
6.9%
PRIMECAP MANAGEMENT CO/CA/
5%
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 |
| Invesco Ltd. |
13D/G
13F
Company
|
10%
|
$676,290,418
24,529,939 shares
|
+$66,529,277 | 30 Apr 2026 |
| BlackRock, Inc. |
13D/G
13F
Company
|
6.9%
|
$372,220,408
16,774,241 shares
|
$0 | 31 Dec 2024 |
| PRIMECAP MANAGEMENT CO/CA/ |
13F
13D/G
Company
|
5%
from 13D/G
|
$253,941,367
12,285,504 shares
|
— | 30 Jun 2026 |
| Goldberg 2014 LLC |
3/4/5
10%+ Owner
|
18%
|
$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 Q3 2026
Investor-level positions for this CUSIP, loaded as an interactive table.
Institutions
45
Shares
2,025,684
Rows available
45
| 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 Q3 2026 vs Q2 2026 Across Filers
Q2 2026 holders
459
Q3 2026 holders
45
Holder diff
-414
| Investor | Q2 2026 Shares | Q3 2026 Shares | Share Diff | Share Chg % | Q2 2026 value | Q3 2026 value | Value change | Value Chg % |
|---|