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Equibles

LOOMIS SAYLES & CO L P

Position in AMTM — Amentum Holdings, Inc.

CIK 312348 BOSTON, MA
Back to AMTM Full portfolio

Position in AMTM

as of Jun 30, 2026 · filed Aug 14, 2026
Position Value
$21,548,929
-$6,652,313 QoQ
Shares Held
1,042,522
-3.6% QoQ
Ownership
0.426%
of shares outstanding
% of Portfolio
0.03%
of 13F equity value
Holder Rank
#30
of 462 holders
Holding Since
Mar 2025
6 quarters on record
Voting authority Sole 82% Shared 0% None 18%

Common Shares in AMTM Over Time

Shares Held

Position Value (USD)

Position in Specialty Business Services

Industrials · as of Jun 30, 2026

LOOMIS SAYLES & CO L P holds $47,404,539 across 4 Specialty Business Services names. AMTM ranks #1 (45.5% of the industry book) .

# Ticker Company Shares Value (USD) Open
1 AMTM
Amentum Holdings, Inc.
This page 		1,042,522 $21,548,929
2 GPN
Global Payments Inc
 206,419 $14,977,762
3 CBZ
CBIZ, Inc.
 339,085 $10,877,846
4 CTAS
Cintas Corp
 0 $2

All Filings in AMTM

Export CSV
6 filing rows on record
Report Date Value (USD) Shares
2026-06-30 $21,548,929 1,042,522
2026-03-31 $28,201,242 1,081,336
2025-12-31 $32,448,970 1,118,930
2025-09-30 $25,484,691 1,064,079
2025-06-30 $25,007,924 1,059,209
2025-03-31 $7,929,266 435,674