MASSACHUSETTS FINANCIAL SERVICES CO /MA/

Position in STX — Seagate Technology Holdings plc

CIK 912938 Boston, MA

Position in STX

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$993,551,152

+$440,425,935 QoQ

Shares Held

2,536,122

+26.3% QoQ

Ownership

1.13%

of shares outstanding

% of Portfolio

0.36%

of 13F equity value

Holder Rank

—

not a current holder

Holding Since

Sep 2022

9 quarters on record

Voting authority Sole 79.55208779388373.ToString("F0")% Shared 16.72660069192255.ToString("F0")% None 3.7213115141937174.ToString("F0")%

Technology · as of Mar 31, 2026

MASSACHUSETTS FINANCIAL SERVICES CO /MA/ holds $1,956,514,518 across 7 Computer Hardware names. STX ranks #1 (50.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	STX	Seagate Technology Holdings plc This page	2,536,122	$993,551,152
2	ANET	Arista Networks, Inc.	7,227,921	$887,444,136
3	WDC	Western Digital Corp	185,516	$50,180,221
4	CRSR	Corsair Gaming, Inc.	3,119,308	$17,312,159
5	SNDK	Sandisk Corp	11,294	$7,175,529
6	QBTS	D-Wave Quantum Inc.	41,479	$598,541
7	IONQ	IonQ, Inc.	8,768	$252,780

9 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$993,551,152	2,536,122	+26.3%	Shares	Defined	2026-05-14
2025-12-31	$553,125,217	2,008,516	+1510.1%	Shares	Sole	2026-01-22
2025-09-30	$29,447,775	124,747	-93.8%	Shares	Sole	2025-10-29
2023-12-31	$172,507,754	2,020,707	-16.2%	Shares	Sole	2024-02-08
2023-09-30	$158,950,249	2,410,163	+24.3%	Shares	Sole	2023-11-08
2023-06-30	$120,001,255	1,939,571	-4.6%	Shares	Sole	2023-08-09
2023-03-31	$134,481,731	2,033,904	+0.7%	Shares	Sole	2023-05-10
2022-12-31	$106,213,905	2,018,892	+83.0%	Shares	Sole	2023-02-13
2022-09-30	$58,715,083	1,103,045	—	Shares	Sole	2022-11-09
No filing history on record for this holder in this stock.