AMTM
insider transactionsAmentum Holdings, Inc. — buys & sells by directors, officers and 10% owners A shareholder owning more than 10% of the company. Must report trades, but usually a weaker signal than an officer or director. (SEC Form 4).
No open-market buys or sells this period. The trades below are grants, option exercises and gifts, which carry no market price.
Net buy / sell volume
Not enough data to chart yet.
Tap or hover the chart for daily net volume. Green = net buying, red = net selling.
All transactions
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Exercise·M
John E. Heller KEY
Chief Executive Officer
$0
18.1K sh
Own +1814500%
-
Other·F
John E. Heller KEY
Chief Executive Officer
$203.7K
8.2K sh · $24.89
Own -2%
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Exercise·M
John E. Heller KEY
Chief Executive Officer
—
18.1K sh
Own +5%
-
Exercise·M
Chief Growth Officer
$0
9.1K sh
Own +907200%
-
Other·F
Chief Growth Officer
$68.7K
2.8K sh · $24.89
Own -8%
-
Exercise·M
Chief Growth Officer
—
9.1K sh
Own +35%
-
Exercise·M
Chief Financial Officer
$0
13.6K sh
Own New
-
Other·F
Chief Financial Officer
$102.0K
4.1K sh · $24.89
Own -3%
-
Exercise·M
Chief Financial Officer
—
13.6K sh
Own +13%
-
Exercise·M
Chief Technology Officer
$0
9.1K sh
Own +907200%
-
Other·F
Chief Technology Officer
$68.0K
2.7K sh · $24.89
Own -1%
-
Exercise·M
Chief Technology Officer
—
9.1K sh
Own +5%
-
Exercise·M
Chief Operating Officer
$0
13.6K sh
Own New
-
Other·F
Chief Operating Officer
$82.5K
3.3K sh · $24.89
Own -3%
-
Exercise·M
Chief Operating Officer
—
13.6K sh
Own +14%
-
Other·G
Chief Technology Officer
$0
30.0K sh
Own -14%
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Exercise·M
Chief Operating Officer
$0
2.8K sh
Own New
-
Other·F
Chief Operating Officer
$23.0K
750 sh · $30.70
Own -1%
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Exercise·M
Chief Operating Officer
—
2.8K sh
Own +3%
-
Exercise·M
Chief Legal Officer & GC
$0
7.1K sh
Own +100%
-
Other·F
Chief Legal Officer & GC
$69.4K
2.3K sh · $30.05
Own -8%
-
Exercise·M
Chief Legal Officer & GC
—
7.1K sh
Own +32%
-
Grant·A
Director
$0
5.1K sh
Own +147%
-
Exercise·M
Director
$0
11.6K sh
Own New
-
Grant·A
Director
$0
5.1K sh
Own +34%
-
Exercise·M
Director
—
11.6K sh
Own +335%
-
Exercise·M
Director
$0
11.6K sh
Own New
-
Grant·A
Director
$0
5.1K sh
Own +23%
-
Exercise·M
Director
—
11.6K sh
Own +107%
-
Exercise·M
Director
$0
11.6K sh
Own New
-
Grant·A
Director
$0
5.1K sh
Own +12%
-
Exercise·M
Director
—
11.6K sh
Own +37%
-
Grant·A
Director
$0
5.1K sh
Own +110%
-
Grant·A
Director
$0
5.1K sh
Own New
-
Exercise·M
Director
$0
11.6K sh
Own New
-
Grant·A
Director
$0
5.1K sh
Own +1%
-
Exercise·M
Director
—
11.6K sh
Own +3%
-
Exercise·M
John E. Heller KEY
Chief Executive Officer
$0
52.0K sh
Own +100%
-
Other·F
John E. Heller KEY
Chief Executive Officer
$705.9K
19.8K sh · $35.71
Own -5%
-
Exercise·M
John E. Heller KEY
Chief Executive Officer
—
52.0K sh
Own +16%
| Date▾ | Insider | Type | Shares | Value |
|---|---|---|---|---|
| May 6, 2026 | John E. Heller KEY | Exercise M | 18.1K | $0 |
| May 6, 2026 | John E. Heller KEY | Other F | 8.2K | $203.7K |
| May 6, 2026 | John E. Heller KEY | Exercise M | 18.1K | — |
| May 6, 2026 | Sean Thomas Mullen | Exercise M | 9.1K | $0 |
| May 6, 2026 | Sean Thomas Mullen | Other F | 2.8K | $68.7K |
| May 6, 2026 | Sean Thomas Mullen | Exercise M | 9.1K | — |
| May 6, 2026 | Travis Barton Johnson KEY | Exercise M | 13.6K | $0 |
| May 6, 2026 | Travis Barton Johnson KEY | Other F | 4.1K | $102.0K |
| May 6, 2026 | Travis Barton Johnson KEY | Exercise M | 13.6K | — |
| May 6, 2026 | Jill L Bruning | Exercise M | 9.1K | $0 |
| May 6, 2026 | Jill L Bruning | Other F | 2.7K | $68.0K |
| May 6, 2026 | Jill L Bruning | Exercise M | 9.1K | — |
| May 6, 2026 | Stephen A Arnette | Exercise M | 13.6K | $0 |
| May 6, 2026 | Stephen A Arnette | Other F | 3.3K | $82.5K |
| May 6, 2026 | Stephen A Arnette | Exercise M | 13.6K | — |
| Mar 4, 2026 | Jill L Bruning | Other G | 30.0K | $0 |
| Mar 2, 2026 | Stephen A Arnette | Exercise M | 2.8K | $0 |
| Mar 2, 2026 | Stephen A Arnette | Other F | 750 | $23.0K |
| Mar 2, 2026 | Stephen A Arnette | Exercise M | 2.8K | — |
| Feb 17, 2026 | Mary Michele T St. | Exercise M | 7.1K | $0 |
| Feb 17, 2026 | Mary Michele T St. | Other F | 2.3K | $69.4K |
| Feb 17, 2026 | Mary Michele T St. | Exercise M | 7.1K | — |
| Feb 6, 2026 | Susan Leslie Ireland | Grant A | 5.1K | $0 |
| Feb 6, 2026 | Sandra E. Rowland | Exercise M | 11.6K | $0 |
| Feb 6, 2026 | Sandra E. Rowland | Grant A | 5.1K | $0 |
| Feb 6, 2026 | Sandra E. Rowland | Exercise M | 11.6K | — |
| Feb 6, 2026 | Vincent K Brooks | Exercise M | 11.6K | $0 |
| Feb 6, 2026 | Vincent K Brooks | Grant A | 5.1K | $0 |
| Feb 6, 2026 | Vincent K Brooks | Exercise M | 11.6K | — |
| Feb 6, 2026 | Ralph E Eberhart | Exercise M | 11.6K | $0 |
| Feb 6, 2026 | Ralph E Eberhart | Grant A | 5.1K | $0 |
| Feb 6, 2026 | Ralph E Eberhart | Exercise M | 11.6K | — |
| Feb 6, 2026 | Barbara Loughran | Grant A | 5.1K | $0 |
| Feb 6, 2026 | Christopher M.T. Thompson | Grant A | 5.1K | $0 |
| Feb 6, 2026 | John C. Vollmer | Exercise M | 11.6K | $0 |
| Feb 6, 2026 | John C. Vollmer | Grant A | 5.1K | $0 |
| Feb 6, 2026 | John C. Vollmer | Exercise M | 11.6K | — |
| Jan 28, 2026 | John E. Heller KEY | Exercise M | 52.0K | $0 |
| Jan 28, 2026 | John E. Heller KEY | Other F | 19.8K | $705.9K |
| Jan 28, 2026 | John E. Heller KEY | Exercise M | 52.0K | — |
About AMTM insider trading
This page tracks insider transactions for Amentum Holdings, Inc. (AMTM) reported to the U.S. Securities and Exchange Commission on Form 4. Corporate insiders — directors, executive officers and beneficial owners of more than 10% of the stock — must disclose their trades within two business days. Open-market purchases (code P) and sales (code S) made at the insider's discretion are the most-watched opportunistic signals, while awards (A), option exercises (M) and tax-withholding (F) reflect compensation rather than conviction. Trades marked 10b5-1 were made under a pre-arranged plan and are considered routine. A cluster buy — several insiders buying within a short window — is historically a stronger bullish indicator than any single trade.