WESTFIELD CAPITAL MANAGEMENT CO LP

CIK

1177719

City

BOSTON

State / Country

MA

Stock

BLD — TopBuild Corp

Top Portfolio Positions

243 positions · $23,810,970,015 total · as of Mar 31, 2026

Ticker	Company	Shares	Value (USD)	% of Portfolio	Open
NVDA	Nvidia Corp Technology	6,317,039	$1,101,691,601	4.63%
ASND	Ascendis Pharma A/S Healthcare	4,813,440	$1,100,978,131	4.62%
FIX	Comfort Systems USA Inc Industrials	620,915	$856,235,575	3.60%
AAPL	Apple Inc. Technology	3,133,113	$795,152,748	3.34%
FTAI	FTAI Aviation Ltd. Industrials	2,848,227	$697,815,615	2.93%
MSFT	Microsoft Corp Technology	1,649,513	$610,600,227	2.56%
GOOGL	Alphabet Inc. Communication Services	2,026,744	$582,810,504	2.45%
HWM	Howmet Aerospace Inc. Industrials	2,289,697	$527,683,570	2.22%
VRT	Vertiv Holdings Co Industrials	1,921,696	$481,538,583	2.02%
AMZN	Amazon Com Inc Consumer Cyclical	2,279,654	$474,783,538	1.99%

Portfolio Trend

25 quarters · across all stocks

Holdings in BLD

Compact Export CSV

Shares Held

Position Value (USD)

12 quarters on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$52,196,505	148,581	-41.8%	Shares	Sole	2026-05-11
2025-12-31	$106,571,602	255,451	+13.5%	Shares	Sole	2026-02-11
2025-09-30	$87,954,834	225,029	-35.8%	Shares	Sole	2025-11-12
2022-03-31	$63,566,855	350,443	-14.8%	Shares	Sole	2022-05-16
2021-12-31	$113,426,325	411,099	-7.5%	Shares	Sole	2022-02-10
2021-09-30	$91,066,513	444,639	+12.6%	Shares	Sole	2021-11-12
2021-06-30	$78,122,704	394,998	-30.6%	Shares	Sole	2021-08-10
2021-03-31	$119,276,667	569,530	-22.3%	Shares	Sole	2021-05-14
2020-12-31	$134,961,565	733,168	-15.1%	Shares	Sole	2021-02-12
2020-09-30	$147,487,425	864,066	-11.3%	Shares	Sole	2020-11-13
2020-06-30	$110,772,729	973,655	+5.3%	Shares	Sole	2020-08-13
2020-03-31	$66,264,134	924,960	—	Shares	Sole	2020-05-14
No 13F history on record for this holder in this stock.