WESTFIELD CAPITAL MANAGEMENT CO LP

Position in ZS — Zscaler, Inc.

CIK 1177719 BOSTON, MA

Position in ZS

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

Position Value

$60,032,756

-$3,126,354 QoQ

Shares Held

427,919

+52.4% QoQ

Ownership

0.265%

of shares outstanding

% of Portfolio

0.25%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Mar 2022

12 quarters on record

Voting authority Sole 85.08806573206613.ToString("F0")% Shared 0.ToString("F0")% None 14.911934267933885.ToString("F0")%

Technology · as of Mar 31, 2026

WESTFIELD CAPITAL MANAGEMENT CO LP holds $1,510,266,224 across 13 Software - Infrastructure names. ZS ranks #8 (4.0% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	MSFT	Microsoft Corp	1,649,513	$610,600,227
2	IOT	Samsara Inc.	5,072,821	$160,757,697
3	NET	Cloudflare, Inc.	541,566	$111,746,728
4	PANW	Palo Alto Networks Inc	636,483	$102,040,954
5	PLTR	Palantir Technologies Inc.	674,557	$98,674,197
6	FFIV	F5, Inc.	298,542	$86,377,156
7	CALX	Calix, Inc	1,546,101	$75,743,487
8	ZS	Zscaler, Inc. This page	427,919	$60,032,756

12 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$60,032,756	427,919	+52.4%	Shares	Sole	2026-05-11
2025-12-31	$63,159,110	280,807	-29.7%	Shares	Sole	2026-02-11
2024-09-30	$68,293,265	399,516	+33.8%	Shares	Sole	2024-11-12
2024-06-30	$57,407,537	298,702	-18.9%	Shares	Sole	2024-08-14
2024-03-31	$70,942,354	368,283	-10.6%	Shares	Sole	2024-05-10
2023-12-31	$91,296,678	412,063	+19.1%	Shares	Sole	2024-02-09
2023-09-30	$53,847,053	346,083	-2.6%	Shares	Sole	2023-11-13
2023-06-30	$52,010,088	355,503	+31.2%	Shares	Sole	2023-08-11
2022-12-31	$30,311,024	270,876	-30.8%	Shares	Sole	2023-02-13
2022-09-30	$64,325,377	391,345	+37.2%	Shares	Sole	2022-11-14
2022-06-30	$42,634,570	285,162	+18.8%	Shares	Sole	2022-08-12
2022-03-31	$57,913,232	240,025	—	Shares	Sole	2022-05-16
No filing history on record for this holder in this stock.