AMENTUM HOLDINGS INC

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AMTM·023939101·US·Common Stock·Industrials - Specialty Business Services-13D/G

AMTM (AMENTUM HOLDINGS INC) is held by 170 institutional investors as of Q2 2026. Largest holders: Invesco Ltd. ($515.8M), BlackRock, Inc. ($370.1M), PRIMECAP MANAGEMENT CO/CA/ ($253.9M). Net institutional sentiment: Mixed.

170

Holders

(16 Elite)

$2.8B

Total Value

50% (175)

Consensus

87 buying - 88 selling

13F: Jun 30, 2026Insider & Congress: Updated regularly

Smart Money Verdict

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Institutional (13F)56

Insider (Form 4)40

Activist (13D/13G)32

Congressional (STOCK Act)53

Holder Quality

84

★★★★★

Elite

26

★★★★

Strong

12

★★★

Solid

50

★★

Below

43

★

Weak

Held by 170 funds

16 elite

Who's Trading

Source dates: Price Oct 15, 2026 · Insiders Sep 17, 2026 · Activists Aug 6, 2026 · Congress none

InsiderTMThompson Christopher M.T.Gift 4K shAug 14, 2026

ActivistPRIMECAP MANAGEMENT CO/CA/5.0%Aug 6, 2026

ActivistInvesco Ltd.10.1%May 7, 2026

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Top Holders

Top Holders (170)History

AllNewIncreasedHeldDecreasedExitedFirst report

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Fund	Action	Shares	Value	Weight	Est. P&L	Conviction
Invesco Ltd.	Increased	25M(+16.2%)	$515.8M	0.0%	-22.23%	36
BlackRock, Inc.	Increased	17.9M(+0.4%)	$370.1M	0.0%	-27.02%	31
PRIMECAP MANAGEMENT CO/CA/	Increased	12.3M(+1.7%)	$253.9M	0.2%	-25.11%	37
VPVANGUARD PORTFOLIO MANAGEMENT LLC	Increased	7.9M(+1.2%)	$164.3M	0.0%	-26.62%	31
VAVANGUARD CAPITAL MANAGEMENT LLC	Increased	6.7M(+0.9%)	$138.7M	0.0%	-26.66%	30
FMR LLC	Increased	5.7M(+1.8%)	$117.4M	0.0%	-11.80%	31
DIMENSIONAL FUND ADVISORS LP	Increased	5.5M(+46.2%)	$114.5M	0.0%	-25.91%	41
STATE STREET CORP	Increased	5.2M(+1.4%)	$106.5M	0.0%	-38.86%	30
FRONTIER CAPITAL MANAGEMENT CO LLC	Decreased	4.1M(-15.9%)	$85.7M	0.8%	-8.87%	0
GEODE CAPITAL MANAGEMENT, LLC	Decreased	2.7M(-3.5%)	$56.2M	0.0%	-34.52%	0
GOLDMAN SACHS GROUP INC	Increased	2.7M(+139.7%)	$56.1M	0.0%	-15.59%	47
MORGAN STANLEY	Increased	2.7M(+19.1%)	$55M	0.0%	-24.25%	35
MAMIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.	Decreased	2.3M(-16.8%)	$47.9M	0.1%	-21.83%	0
MILLENNIUM MANAGEMENT LLC	Increased	2.1M(+237.2%)	$44M	0.0%	-14.02%	47
CHARLES SCHWAB INVESTMENT MANAGEMENT INC	Increased	2.1M(+2.5%)	$43.8M	0.0%	-25.80%	30
BANK OF AMERICA CORP /DE/	Decreased	2M(-15.1%)	$42.2M	0.0%	-28.85%	0
Verition Fund Management LLC	Increased	2M(+55.6%)	$41.7M	0.2%	-17.48%	49
VOYA INVESTMENT MANAGEMENT LLC	Increased	2M(+64.6%)	$40.8M	0.0%	-11.72%	42
UBS Group AG	Decreased	1.5M(-9.7%)	$31.9M	0.0%	-25.89%	0
LOOMIS SAYLES & CO L P	Decreased	1M(-3.6%)	$21.5M	0.0%	-12.31%	0

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Data sourced from four public-disclosure sources: SEC 13F, Form 4, 13D/13G, and House/Senate STOCK Act disclosures. Not financial advice. Full disclaimer