WESTFIELD CAPITAL MANAGEMENT CO LP

Position in DORM — Dorman Products, Inc.

CIK 1177719 BOSTON, MA

Position in DORM

as of Mar 31, 2026 · filed May 11, 2026 Compact

Position Value

$48,139,389

-$8,800,507 QoQ

Shares Held

461,282

-0.2% QoQ

Ownership

1.54%

of shares outstanding

% of Portfolio

0.20%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Dec 2025

2 quarters on record

Voting authority Sole 95.10277877740731.ToString("F0")% Shared 0.ToString("F0")% None 4.897221222592687.ToString("F0")%

Consumer Cyclical · as of Mar 31, 2026

WESTFIELD CAPITAL MANAGEMENT CO LP holds $225,914,550 across 3 Auto Parts names. DORM ranks #3 (21.3% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	AZO	Autozone Inc	28,363	$95,803,974
2	ORLY	O Reilly Automotive Inc	887,999	$81,971,187
3	DORM	Dorman Products, Inc. This page	461,282	$48,139,389

2 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$48,139,389	461,282	-0.2%	Shares	Sole	2026-05-11
2025-12-31	$56,939,896	462,212	—	Shares	Sole	2026-02-11
No filing history on record for this holder in this stock.