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Equibles

Arvin Capital Management LP

Position in AMTM — Amentum Holdings, Inc.

CIK 1961738 AUSTIN, TX
Back to AMTM Full portfolio

Position in AMTM

as of Jun 30, 2026 · filed Aug 13, 2026
Position Value
$8,613,292
-$45,403,604 QoQ
Shares Held
416,705
-79.9% QoQ
Ownership
0.170%
of shares outstanding
% of Portfolio
1.61%
of 13F equity value
Holder Rank
#53
of 462 holders
Holding Since
Dec 2024
7 quarters on record
Voting authority Sole 100% Shared 0% None 0%

Common Shares in AMTM Over Time

Shares Held

Position Value (USD)

Derivatives in AMTM

reported options exposure · as of Jun 30, 2026
CallValue
$9,301,500
CallShares
450,000
PutValue
$0
PutShares
0

Notional value of option positions as reported on Form 13F. Calls and puts are disclosed separately and do not net against the common-share stake above.

Position in Specialty Business Services

Industrials · as of Jun 30, 2026

Arvin Capital Management LP holds $25,805,387 across 2 Specialty Business Services names. AMTM ranks #2 (33.4% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 RBA
Rb Global Inc.
 147,635 $17,192,095
2 AMTM
Amentum Holdings, Inc.
This page 		416,705 $8,613,292

All Filings in AMTM

Export CSV
14 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $9,301,500 450,000
2026-06-30 $8,613,292 416,705
2026-03-31 $54,016,896 2,071,200
2026-03-31 $3,912,000 150,000
2026-03-31 $15,556,720 596,500
2025-12-31 $4,770,500 164,500
2025-12-31 $47,458,268 1,636,492
2025-09-30 $39,193,983 1,636,492
2025-06-30 $2,361,000 100,000
2025-06-30 $50,512,036 2,139,434
2025-03-31 $30,706,111 1,687,149
2025-03-31 $13,311,480 731,400
2024-12-31 $4,206,000 200,000
2024-12-31 $20,298,092 965,197