WESTFIELD CAPITAL MANAGEMENT CO LP

Position in DHR — Danaher Corp /De/

CIK 1177719 BOSTON, MA

Position in DHR

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

Position Value

$20,949,283

-$52,645,521 QoQ

Shares Held

110,492

-65.6% QoQ

Ownership

0.016%

of shares outstanding

% of Portfolio

0.09%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2020

25 quarters on record

Voting authority Sole 97.52923288563878.ToString("F0")% Shared 0.ToString("F0")% None 2.4707671143612204.ToString("F0")%

Healthcare · as of Mar 31, 2026

WESTFIELD CAPITAL MANAGEMENT CO LP holds $572,134,101 across 8 Diagnostics & Research names. DHR ranks #7 (3.7% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	NTRA	Natera, Inc.	754,729	$150,938,252
2	GH	Guardant Health, Inc.	1,362,539	$125,857,727
3	WGS	GeneDx Holdings Corp.	1,369,108	$87,924,115
4	ADPT	Adaptive Biotechnologies Corp	5,436,718	$75,461,645
5	IDXX	Idexx Laboratories Inc /De	132,860	$74,652,705
6	RDNT	RadNet, Inc.	531,893	$29,727,499
7	DHR	Danaher Corp /De/ This page	110,492	$20,949,283
8	TMO	Thermo Fisher Scientific Inc.	13,474	$6,622,875

25 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$20,949,283	110,492	-65.6%	Shares	Sole	2026-05-11
2025-12-31	$73,594,804	321,487	+6390.8%	Shares	Sole	2026-02-11
2025-09-30	$981,981	4,953	-69.3%	Shares	Sole	2025-11-12
2025-06-30	$3,182,369	16,110	+1.9%	Shares	Sole	2025-08-12
2025-03-31	$3,241,050	15,810	-14.7%	Shares	Sole	2025-05-09
2024-12-31	$4,255,168	18,537	-13.4%	Shares	Sole	2025-02-11
2024-09-30	$5,952,130	21,409	-2.7%	Shares	Sole	2024-11-12
2024-06-30	$5,495,450	21,995	+5.8%	Shares	Sole	2024-08-14
2024-03-31	$5,190,430	20,785	-6.5%	Shares	Sole	2024-05-10
2023-12-31	$5,143,613	22,234	-18.4%	Shares	Sole	2024-02-09
2023-09-30	$5,990,251	27,235	-7.0%	Shares	Sole	2023-11-13
2023-06-30	$6,232,767	29,294	-5.8%	Shares	Sole	2023-08-11
2023-03-31	$6,950,538	31,107	-0.4%	Shares	Sole	2023-05-12
2022-12-31	$7,345,874	31,219	0.0%	Shares	Sole	2023-02-13
2022-09-30	$7,148,542	31,219	-3.7%	Shares	Sole	2022-11-14
2022-06-30	$7,285,554	32,416	+0.5%	Shares	Sole	2022-08-12
2022-03-31	$8,384,608	32,243	+0.3%	Shares	Sole	2022-05-16
2021-12-31	$9,373,283	32,136	-1.2%	Shares	Sole	2022-02-10
2021-09-30	$8,777,209	32,521	-0.8%	Shares	Sole	2021-11-12
2021-06-30	$7,796,476	32,771	0.0%	Shares	Sole	2021-08-10
2021-03-31	$6,539,092	32,771	+1.6%	Shares	Sole	2021-05-14
2020-12-31	$6,353,636	32,263	+0.3%	Shares	Sole	2021-02-12
2020-09-30	$6,140,532	32,167	0.0%	Shares	Sole	2020-11-13
2020-06-30	$5,042,634	32,167	-0.4%	Shares	Sole	2020-08-13
2020-03-31	$3,961,740	32,287	—	Shares	Sole	2020-05-14
No filing history on record for this holder in this stock.