Position in AMTM
as of Mar 31, 2026
· filed May 11, 2026
Position Value
$315,184,467
-$36,496,416 QoQ
Shares Held
12,085,294
-0.3% QoQ
Ownership
4.95%
of shares outstanding
% of Portfolio
0.26%
of 13F equity value
Holder Rank
—
not a current holder
Holding Since
Sep 2024
7 quarters on record
Voting authority
Sole 94%
Shared 0%
None 6%
Common Shares in AMTM Over Time
Shares Held
Position Value (USD)
Position in Specialty Business Services
Industrials · as of Mar 31, 2026PRIMECAP MANAGEMENT CO/CA/ holds $315,184,467 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
|
12,085,294 | $315,184,467 |
All Filings in AMTM
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7 filing rows on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $315,184,467 | 12,085,294 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $351,680,883 | 12,126,927 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $285,450,134 | 11,918,586 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $284,043,788 | 12,030,656 | Shares | Sole | 2025-08-11 | |
| 2025-03-31 | $183,120,919 | 10,061,589 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $134,894,390 | 6,414,379 | Shares | Sole | 2025-02-10 | |
| 2024-09-30 | $169,998,844 | 5,271,282 | Shares | Sole | 2024-11-08 | |
| No filing history on record for this holder in this stock. | ||||||