Seagate Technology PLC

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Seagate Technology PLC
TickerSTX
CIK #0001137789
CUSIPG7997R103
SectorTechnology - Computer Storage Devices
AddressArthur Cox Building Earlsfort Terrace, Dublin 2, 00000
Source [EDGAR]
Reg D Offering (Form D) Filed Raised Terms
Seagate Technology PLC 2011-12-23 681.8 M Exemption: 506 · Duration: One year or less · Revenue: Over $100,000,000
CIK Filing 2011 - 2026
[0001137789] 10-K
[0001137789] 10-Q
[0001137789] 3
[0001137789] 4
[0001137789] 5
[0001137789] 8-K
[0001137789] SC 13D
[0001137789] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Vanguard Capital Management LLC Seagate Technology Holdings PLC [2026-04-30] 0.0
Vanguard Portfolio Management LLC Seagate Technology Holdings PLC [2026-04-29] 0.0
Capital Research Global Investors Seagate Technology Holdings PLC [2025-02-13] 0.0
FMR LLC Seagate Technology Holdings PLC [2024-02-09] 0.0
Capital Research Global Investors Seagate Technology Holdings PLC [2024-02-09] 7.9
Sanders Capital LLC Seagate Technology Holdings PLC [2023-02-17] 5.31
BlackRock Inc Seagate Technology Holdings PLC [2022-02-04] 6.6
JPMorgan Chase & Co Seagate Technology Holdings PLC [2022-01-28] 5.3
VA Partners I LLC Seagate Technology PLC [2017-08-11] 7.2
BlackRock Inc Seagate Technology PLC [2015-02-06] 5.1
Clearbridge Investments LLC Seagate Technology PLC [2013-02-14] 5.05
Vanguard Group Inc Seagate Technology PLC [2013-02-13] 6.05
Greenlight Capital LLC Seagate Technology PLC [2012-06-11] 1.4
Form 3/4/5 Filer 2011 - 2026
Seagate Technology Holdings PLC
Mosley William D
Morris John Christopher
Romano Gianluca
Chong Kian Fatt
Teh Ban Seng
Arumugavelu Shankar
Conyers Yolanda Lee
Bhatt Prat
Tilenius Stephanie
Lee James CI
Geldmacher Jay L
Adams Mark
Szlosek Thomas A
Haggart Dylan G
Clemmer Richard L
Cannon Michael R
Bruner Judy
Bruggeworth Robert A
Schuelke Katherine
Zander Edward J
Naik Ravi
Nygaard Jeffrey D
ValueAct Capital Management LLC
ValueAct Holdings II LP
ValueAct Capital Management LP
VA Partners I LLC
ValueAct Capital Master Fund LP
ValueAct Holdings LP
ValueAct Holdings GP LLC
Fochtman Jeffrey D
Luczo Stephen J
ValueAct Capital Master Fund B LP
Coleman William T III
Murphy James J
Cheng Mei Wei
Park Chong SUP
Hottier-Fayon Geraldine
Scolnick Kathryn R
Morton David H Jr
Brace Philip G
Biondi Frank
Moyo Dambisa F
Massaroni Kenneth M
RE Mark
MacPherson Regan J
Onken Kristen M
Reyes Gregorio
O Malley Patrick J
Dehaan Douglas J
Pimentel Albert A
Richarz David K
Lerner James J
Marshall Lydia Micheaux
Jeong Seh-Woong
Samsung Electronics Co Ltd /FI
Whitmore Robert W
Seagate Technology HDD Holdings
Seagate Technology US Holdings
Seagate Technology
Seagate Technology LLC
E2open Inc
Seagate HDD Cayman
Insider Transaction (Form 3/4/5) Date Action Shares Price Value ($)
Mosley William D
Ordinary Shares
2026-03-19 Sell 24,584 $406.77 10,000,034
Morris John Christopher
Ordinary Shares
2026-03-13 Sell 112 $377.44 42,273
Mosley William D
Restricted Share Unit · derivative
2026-03-11 Option exercise 3,319 $0.00
Chong Kian Fatt
Ordinary Shares
2026-03-11 Option exercise 678 $0.00
Romano Gianluca
Ordinary Shares
2026-03-11 Option exercise 1,695 $0.00
Mosley William D
Ordinary Shares
2026-03-11 Tax withheld 1,658 $385.97 639,938
Romano Gianluca
Ordinary Shares
2026-03-11 Tax withheld 847 $385.97 326,917
Morris John Christopher
Ordinary Shares
2026-03-11 Tax withheld 430 $385.97 165,967
Mosley William D
Ordinary Shares
2026-03-11 Option exercise 3,319 $0.00
Teh Ban Seng
Restricted Share Unit · derivative
2026-03-11 Option exercise 989 $0.00
Morris John Christopher
Ordinary Shares
2026-03-11 Option exercise 942 $0.00
Morris John Christopher
Restricted Share Unit · derivative
2026-03-11 Option exercise 942 $0.00
Chong Kian Fatt
Restricted Share Unit · derivative
2026-03-11 Option exercise 678 $0.00
Romano Gianluca
Restricted Share Unit · derivative
2026-03-11 Option exercise 1,695 $0.00
Teh Ban Seng
Ordinary Shares
2026-03-11 Option exercise 989 $0.00
Romano Gianluca
Ordinary Shares
2026-03-09 Option exercise 1,515 $0.00
Chong Kian Fatt
Restricted Share Unit · derivative
2026-03-09 Option exercise 202 $0.00
Mosley William D
Ordinary Shares
2026-03-09 Tax withheld 1,406 $374.33 526,308
Mosley William D
Ordinary Shares
2026-03-09 Tax withheld 1,207 $374.33 451,816
Chong Kian Fatt
Ordinary Shares
2026-03-09 Option exercise 202 $0.00
showing 20 of 200 most recent transactions
13F Ownership Over TimeHoldersShares Held
2026-03-31 1,467 204,221,155
2025-12-31 1,283 212,477,267
2025-09-30 1,132 221,348,308
2025-06-30 960 210,594,845
2025-03-31 807 207,487,159
2024-12-31 809 197,202,730
2024-09-30 828 215,447,349
2024-06-30 806 212,055,360
2024-03-31 776 219,864,067
2023-12-31 737 217,257,778
2023-09-30 659 196,116,803
2023-06-30 665 181,634,379
Form 13F Holdings
Firm Period DFND Voting Shares
Swedbank AB [2026-06-30] DFND 822,089 822,089
Cacti Asset Management LLC [2026-06-30] SOLE 327,925 327,925
Amanah Holdings Trust [2026-06-30] SOLE 289,774 289,774
Wedge Capital Management L L P/NC [2026-06-30] SOLE 55,316 77,655
Eastern Bank [2026-06-30] SOLE 63,596 67,540
Czech National Bank [2026-06-30] SOLE 63,824 63,824
Commonwealth of Pennsylvania Public School Empls Retrmt SYS [2026-06-30] SOLE 49,526 49,526
UNICOM Systems Inc [2026-06-30] SOLE 41,977,500 43,500
KWMG LLC [2026-06-30] SOLE 0 43,371
Schmeidler A R & Co Inc [2026-06-30] SOLE 1,260 32,635
Wealth Enhancement Advisory Services LLC [2026-06-30] SOLE 1,602 31,830
ASR Vermogensbeheer NV [2026-06-30] DFND 29,647 29,647
Gateway Investment Advisers LLC [2026-06-30] SOLE 27,093 27,093
Chapin Davis Inc [2026-06-30] SOLE 0 26,495
Portman Square Capital LLP [2026-06-30] SOLE 25,167 25,167
Zevenbergen Capital Investments LLC [2026-06-30] OTR 22,100 22,100
Prospera Financial Services Inc [2026-06-30] SOLE 0 22,041
QRG Capital Management Inc [2026-06-30] SOLE 21,081 21,081
Yousif Capital Management LLC [2026-06-30] SOLE 4,795 20,559
Bell Bank [2026-06-30] SOLE 17,772 17,772
Brookstone Capital Management [2026-06-30] SOLE 0 17,150
Seabridge Investment Advisors LLC [2026-06-30] SOLE 16,891 16,891
Farther Finance Advisors LLC [2026-06-30] SOLE 0 15,286
TB Alternative Assets Ltd [2026-06-30] DFND 14,652 14,652
Avanza Fonder AB [2026-06-30] SOLE 14,490 14,490
BTC Capital Management Inc [2026-06-30] DFND 0 14,049
Spire Wealth Management [2026-06-30] SOLE 0 11,509
Sequoia Financial Advisors LLC [2026-06-30] SOLE 0 11,139
Aull & Monroe Investment Management Corp [2026-06-30] SOLE 10,969 10,969
Independent Financial Group LLC [2026-06-30] SOLE 0 10,783
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