Amentum Holdings, Inc.
Amentum Holdings, Inc. (AMTM) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · AMTM · as of Jun 8, 2026
Activity summary
Buy transactions
0
P-Purchase only
Sell transactions
0
12 Months
Buy/Sell ratio
0.00
Buy/Sell (by trades)
Overall sentiment
Amentum Holdings, Inc. insiders have shown mixed buying and selling activity over the past 12 Months.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 8, 2026
AMTM insider buying and selling by quarter
AMTM insider selling · AMTM insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 8, 2026
Active insiders
Most active in past 12 months · AMTM ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
AMTM executive sell shares · AMTM board member insider trading · AMTM insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| May 6, 2026 | Heller John E. CEO · Director | Option | 18,145 | — | Form 4 |
| May 6, 2026 | Heller John E. CEO · Director | Other | 8,184 | $204K | Form 4 |
| May 6, 2026 | Mullen Sean Thomas Chief Growth Officer | Option | 9,072 | — | Form 4 |
| May 6, 2026 | Mullen Sean Thomas Chief Growth Officer | Other | 2,762 | $69K | Form 4 |
| May 6, 2026 | Johnson Travis Barton CFO | Option | 13,609 | — | Form 4 |
| May 6, 2026 | Johnson Travis Barton CFO | Other | 4,097 | $102K | Form 4 |
| May 6, 2026 | Bruning Jill L CTO | Option | 9,072 | — | Form 4 |
| May 6, 2026 | Bruning Jill L CTO | Other | 2,731 | $68K | Form 4 |
| May 6, 2026 | Arnette Stephen A COO | Option | 13,609 | — | Form 4 |
| May 6, 2026 | Arnette Stephen A COO | Other | 3,314 | $82K | Form 4 |
| Mar 4, 2026 | Bruning Jill L CTO | Gift | 30,000 | — | Form 4 |
| Mar 2, 2026 | Arnette Stephen A COO | Option | 2,808 | — | Form 4 |
| Mar 2, 2026 | Arnette Stephen A COO | Other | 750 | $23K | Form 4 |
| Feb 17, 2026 | St. Mary Michele T Chief Legal Officer & GC | Option | 7,080 | — | Form 4 |
| Feb 17, 2026 | St. Mary Michele T Chief Legal Officer & GC | Other | 2,308 | $69K | Form 4 |
| Feb 6, 2026 | IRELAND SUSAN LESLIE Director | Award | 5,062 | — | Form 4 |
| Feb 6, 2026 | Rowland Sandra E. Director | Award | 5,062 | — | Form 4 |
| Feb 6, 2026 | Rowland Sandra E. Director | Option | 11,564 | — | Form 4 |
| Feb 6, 2026 | Brooks Vincent K Director | Award | 5,062 | — | Form 4 |
| Feb 6, 2026 | Brooks Vincent K Director | Option | 11,564 | — | Form 4 |
| Feb 6, 2026 | EBERHART RALPH E Director | Award | 5,062 | — | Form 4 |
| Feb 6, 2026 | EBERHART RALPH E Director | Option | 11,564 | — | Form 4 |
| Feb 6, 2026 | Loughran Barbara Director | Award | 5,062 | — | Form 4 |
| Feb 6, 2026 | Thompson Christopher M.T. Director | Award | 5,062 | — | Form 4 |
| Feb 6, 2026 | Vollmer John C. Director | Award | 5,062 | — | Form 4 |
Mullen Sean Thomas
Chief Growth Officer
Date
May 6
Shares
2,762
Price
$24.89
Value
$69K
St. Mary Michele T
Chief Legal Officer & GC
Date
Feb 17
Shares
7,080
Price
—
Value
—
St. Mary Michele T
Chief Legal Officer & GC
Date
Feb 17
Shares
2,308
Price
$30.05
Value
$69K
⚡ = value ≥ $1M · Award/Option price shows — · formType=4 · securityName=Common Stock · url → sec.gov/Archives/edgar
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About AMTM insider trading
AMTM insider trades
Amentum Holdings, Inc. (AMTM) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Arnette Stephen A (COO), Heller John E. (CEO · Director), Mullen Sean Thomas (Chief Growth Officer). Over the past 12 months, 5 insiders have filed transactions with the SEC. AMTM insiders have been mixed buying and selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Amentum Holdings, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
AMTM insider trading · 5 questionsThe insiders of Amentum Holdings, Inc. (AMTM) include executives and directors such as Arnette Stephen A (COO), Heller John E. (CEO · Director), Mullen Sean Thomas (Chief Growth Officer), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 8, 2026