Seagate Technology Holdings plc

STX

Exchange: Nasdaq
Industry: Computer Storage Devices
SEC CIK: 0001137789

SEC filings (opens in a new tab)

In the last 90 days, Seagate Technology Holdings plc insiders filed 0 open-market purchases and 34 sales; 1,973 institutions reported holding it in 13F filings for Q2 2026, worth $181.1B in total; 5 superinvestors hold it, including Lone Pine Capital and Tiger Global Management.

13F holders, Q3 2026

Institutional positions in Seagate Technology Holdings plc as of Sep 30, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works

Q3 2026 data is still coming in (13F filing deadline: Nov 16, 2026), so these numbers are incomplete.

Institutional holders: 8; 0 vs. Q2 2026
Shares held: 276.8K; −55.9K (−16.8%) vs. Q2 2026
Total value: $252.8M; −$68.1M (−21.2%) vs. Q2 2026
New holders: 1; 1 more added
Sold out: 1; 4 more reduced

1,965 institutions that held it in Q2 2026 haven't filed for Q3 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q2 2026: new holders, sold out and not filed yet

Holders and value by quarter

Institutions reporting STX on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.

Institutional holders

Value held

Institutions holding STX and their total value by quarter
Quarter	Holders	Value
Q2 2026	1,973	$181.1B
Q1 2026	1,472	$74.2B
Q4 2025	1,280	$53.5B
Q3 2025	1,126	$45.8B
Q2 2025	956	$28.8B
Q1 2025	801	$16.9B
Q4 2024	806	$16.6B
Q3 2024	821	$20.4B
Q2 2024	799	$19.3B
Q1 2024	768	$17.2B
Q4 2023	730	$16.2B
Q3 2023	657	$12.3B
Q2 2023	660	$11.0B
Q1 2023	673	$12.1B
Q4 2022	643	$9.40B
Q3 2022	666	$9.29B
Q2 2022	714	$12.5B
Q1 2022	703	$15.4B
Q4 2021	794	$20.4B
Q3 2021	694	$15.2B
Q2 2021	679	$16.2B
Q1 2021	678	$15.5B

Institutions, Q3 2026

Shares, value and share of portfolio for each institution holding Seagate Technology Holdings plc; share changes are against Q2 2026.

Institutions holding STX in Q3 2026
Institution	Shares	Value	% of portfolio	Change in shares	Action
State of New Jersey Common Pension Fund D	–	–	–	–	Not filed
Public Employees Retirement Association of Colorado	–	–	–	–	Not filed
Eastern Bank	–	–	–	–	Not filed
Vinva Investment Management Ltd	–	–	–	–	Not filed
SEB Asset Management AB	–	–	–	–	Not filed
HighTower Advisors, LLC	–	–	–	–	Not filed
Nordea Investment Management AB	–	–	–	–	Not filed
Public Sector Pension Investment Board	–	–	–	–	Not filed
Zurcher Kantonalbank (Zurich Cantonalbank)	–	–	–	–	Not filed
Lansforsakringar Fondforvaltning AB (publ)	–	–	–	–	Not filed
Commonwealth Equity Services, LLC	–	–	–	–	Not filed
Jump Financial, LLC	–	–	–	–	Not filed
La Banque Postale Asset Management SA	–	–	–	–	Not filed
CCM Investment Advisers LLC	–	–	–	–	Not filed
Daiwa Securities Group Inc.	–	–	–	–	Not filed
Fjarde Ap-Fonden /Fourth Swedish National Pension Fund	–	–	–	–	Not filed
Scopus Asset Management, L.P.	–	–	–	–	Not filed
Chicago Capital, LLC	–	–	–	–	Not filed
Nomura Holdings Inc	–	–	–	–	Not filed
Squarepoint Ops LLC	–	–	–	–	Not filed
Czech National Bank	–	–	–	–	Not filed
Life Cycle Investment Partners Ltd	–	–	–	–	Not filed
Mn Services Vermogensbeheer B.V.	–	–	–	–	Not filed
Keystone Financial Group	–	–	–	–	Not filed
Mediolanum International Funds Ltd	–	–	–	–	Not filed
The PNC Financial Services Group, Inc.	–	–	–	–	Not filed
TD Waterhouse Canada Inc.	–	–	–	–	Not filed
Prudential PLC	–	–	–	–	Not filed
Pacer Advisors, Inc.	–	–	–	–	Not filed
iA Global Asset Management Inc.	–	–	–	–	Not filed
Nisa Investment Advisors, LLC	–	–	–	–	Not filed
Man Group plc	–	–	–	–	Not filed
Arizona State Retirement System	–	–	–	–	Not filed
Caisse de Depot Et Placement du Quebec	–	–	–	–	Not filed
Jefferies Financial Group Inc.	–	–	–	–	Not filed
Central Asset Investments & Management Holdings (HK) Ltd	–	–	–	–	Not filed
Advisors Capital Management, LLC	–	–	–	–	Not filed
Davidson Kempner Capital Management LP	–	–	–	–	Not filed
Capital Fund Management S.A.	–	–	–	–	Not filed
Hallmark Capital Management Inc	–	–	–	–	Not filed
State of Michigan Retirement System	–	–	–	–	Not filed
FIL Ltd	–	–	–	–	Not filed
Eurizon Capital SGR S.p.A.	–	–	–	–	Not filed
Colony Capital, Inc.	–	–	–	–	Not filed
Sumitomo Mitsui DS Asset Management Company, Ltd	–	–	–	–	Not filed
Woodline Partners LP	–	–	–	–	Not filed
Hosking Partners LLP	–	–	–	–	Not filed
Wealthfront Advisers LLC	–	–	–	–	Not filed
Northwestern Mutual Wealth Management Co	–	–	–	–	Not filed
Trexquant Investment LP	–	–	–	–	Not filed
Mercer Global Advisors Inc	–	–	–	–	Not filed
1832 Asset Management L.P.	–	–	–	–	Not filed
Westfield Capital Management Co LP	–	–	–	–	Not filed
CIBC World Markets Inc.	–	–	–	–	Not filed
Aufman Associates Inc	–	–	–	–	Not filed
Achmea Investment Management B.V.	–	–	–	–	Not filed
IFM Investors Pty Ltd	–	–	–	–	Not filed
MML Investors Services, LLC	–	–	–	–	Not filed
Resona Asset Management Co.,Ltd.	–	–	–	–	Not filed
Pinpoint Asset Management (Singapore) Pte. Ltd.	–	–	–	–	Not filed
Commonwealth of Pennsylvania Public School Empls Retrmt Sys	–	–	–	–	Not filed
Maytus Capital Management, LLC	–	–	–	–	Not filed
Twin Lakes Capital Management, LLC	–	–	–	–	Not filed
DnB Asset Management AS	–	–	–	–	Not filed
Pathstone Holdings, LLC	–	–	–	–	Not filed
MetLife Investment Management	–	–	–	–	Not filed
Navellier & Associates Inc	–	–	–	–	Not filed
Retirement Systems of Alabama	–	–	–	–	Not filed
Fideuram Asset Management (Ireland) dac	–	–	–	–	Not filed
GW&K Investment Management, LLC	–	–	–	–	Not filed
Prudential Financial Inc	–	–	–	–	Not filed
MUFG Securities EMEA plc	–	–	–	–	Not filed
USS Investment Management Ltd	–	–	–	–	Not filed
Captrust Financial Advisors	–	–	–	–	Not filed
Advisory Services Network, LLC	–	–	–	–	Not filed
Macquarie Group Ltd	–	–	–	–	Not filed
Ieq Capital, LLC	–	–	–	–	Not filed
Keybank National Association	–	–	–	–	Not filed
Verition Fund Management LLC	–	–	–	–	Not filed
UNICOM Systems, Inc.	–	–	–	–	Not filed
KWMG, LLC	–	–	–	–	Not filed
E Fund Management Co., Ltd.	–	–	–	–	Not filed
Indivisible Partners	–	–	–	–	Not filed
Sanctuary Advisors, LLC	–	–	–	–	Not filed
Rockefeller Capital Management L.P.	–	–	–	–	Not filed
Boothbay Fund Management, LLC	–	–	–	–	Not filed
Generali Asset Management SPA SGR	–	–	–	–	Not filed
JustInvest LLC	–	–	–	–	Not filed
Vident Advisory, LLC	–	–	–	–	Not filed
Panoramic Capital, LLC	–	–	–	–	Not filed
Harvest Portfolios Group Inc.	–	–	–	–	Not filed
Migdal Insurance & Financial Holdings Ltd.	–	–	–	–	Not filed
Rokos Capital Management LLP	–	–	–	–	Not filed
Deroy & Devereaux Private Investment Counsel Inc	–	–	–	–	Not filed
Lido Advisors, LLC	–	–	–	–	Not filed
IMC-Chicago, LLC	–	–	–	–	Not filed
Truist Financial Corp	–	–	–	–	Not filed
Apis Capital Advisors, LLC	–	–	–	–	Not filed
US Bancorp	–	–	–	–	Not filed
Cambridge Investment Research Advisors, Inc.	–	–	–	–	Not filed