WESTFIELD CAPITAL MANAGEMENT CO LP

Position in AM — Antero Midstream Corp

CIK 1177719 BOSTON, MA

Position in AM

as of Jun 30, 2026 · filed Aug 12, 2026 Compact

Position Value

$3,035,123

+$2,726,998 QoQ

Shares Held

133,412

+418.7% QoQ

Ownership

0.028%

of shares outstanding

% of Portfolio

0.01%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2023

2 quarters on record

Voting authority Sole 100% Shared 0% None 0%

Energy · as of Jun 30, 2026

WESTFIELD CAPITAL MANAGEMENT CO LP holds $148,082,877 across 4 Oil & Gas Midstream names. AM ranks #4 (2.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	TRGP	Targa Resources Corp.	287,128	$76,990,501
2	LNG	Cheniere Energy, Inc.	228,475	$54,607,809
3	WMB	Williams Companies, Inc.	180,918	$13,449,444
4	AM	Antero Midstream Corp This page	133,412	$3,035,123

2 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-06-30	$3,035,123	133,412	+418.7%	Shares	Sole	2026-08-12
2023-09-30	$308,125	25,720	—	Shares	Sole	2023-11-13
No filing history on record for this holder in this stock.