Insider holders · CIK 0001137789
Seagate Technology Holdings plc · STX
Every insider with a reported Table I holding at this company, ranked by their last-reported share count. A balance is only as fresh as its filing — the report date sits next to every row on purpose. ← Back to activity
| Insider | Direct shares | Indirect shares | Total reported | Last report (ET) | From |
|---|---|---|---|---|---|
| ValueAct Capital Master Fund, L.P.Director | 3,382 | 27,295,160 | 27,298,542 | Feb 8, 2019 · 6:21 pm EST | Form 4 |
| ValueAct Holdings, L.P.Director | 3,382 | 27,295,160 | 27,298,542 | Feb 8, 2019 · 6:21 pm EST | Form 4 |
| ValueAct Holdings GP, LLCDirector | 3,382 | 27,295,160 | 27,298,542 | Feb 8, 2019 · 6:21 pm EST | Form 4 |
| VA Partners I, LLCDirector | 3,382 | 27,295,160 | 27,298,542 | Feb 8, 2019 · 6:21 pm EST | Form 4 |
| ValueAct Capital Management, LLCDirector | 3,382 | 27,295,160 | 27,298,542 | Feb 8, 2019 · 6:21 pm EST | Form 4 |
| ValueAct Capital Management, L.P.Director | 3,382 | 27,295,160 | 27,298,542 | Feb 8, 2019 · 6:21 pm EST | Form 4 |
| ValueAct Holdings II, L.P.Director | — | 27,295,160 | 27,295,160 | Feb 8, 2019 · 6:21 pm EST | Form 4 |
| ValueAct Capital Master Fund B, L.P.Director | — | 27,295,160 | 27,295,160 | Feb 8, 2019 · 6:21 pm EST | Form 4 |
| Dylan G. HaggartDirector | 3,382 | 26,396,565 | 26,399,947 | Oct 31, 2018 · 6:23 pm EDT | Form 4 |
| Patrick J O'MalleyEVP & Chief Financial Officer | 136,793 | 401,557 | 538,350 | Sep 23, 2015 · 9:10 pm EDT | Form 4 |
| William D MosleyCEO | 378,108 | — | 378,108 | Sep 16, 2026 · 4:10 pm EDT | Form 4 |
| Stephen J LuczoExecutive Chairman & COB | 45,999 | 155,987 | 201,986 | Feb 22, 2019 · 4:16 pm EST | Form 4 |
| Albert A PimentelPresident, Global Mkts and CSO | 38,226 | 79,202 | 117,428 | Sep 23, 2015 · 9:03 pm EDT | Form 4 |
| Kenneth M MassaroniSVP, Interim CLO | 108,133 | — | 108,133 | Jun 14, 2017 · 4:24 pm EDT | Form 4 |
| Gianluca RomanoEVP & CFO | 70,757 | — | 70,757 | Sep 16, 2026 · 4:10 pm EDT | Form 4 |
| Chong Sup ParkDirector | 16,809 | 32,527 | 49,336 | Oct 22, 2018 · 6:11 pm EDT | Form 4 |
| Mark ReSVP & CTO | 40,470 | — | 40,470 | May 16, 2017 · 7:24 pm EDT | Form 4 |
| Jeffrey D. NygaardExecutive Vice President | 3,162 | 30,192 | 33,354 | Nov 21, 2018 · 4:05 pm EST | Form 4 |
| Frank BiondiDirector | 5,399 | 27,262 | 32,661 | Oct 19, 2017 · 7:05 pm EDT | Form 4 |
| Douglas J DehaanGeneral Manager, Samsung HDD | 32,517 | — | 32,517 | Sep 23, 2015 · 9:05 pm EDT | Form 4 |
| Michael R CannonDirector | 20,414 | 6,885 | 27,299 | Oct 22, 2018 · 5:27 pm EDT | Form 4 |
| Katherine SchuelkeSVP, CLO & Corporate Secretary | 25,594 | — | 25,594 | Jul 24, 2018 · 4:47 pm EDT | Form 4 |
| Kian Fatt ChongEVP Global Operations | 25,093 | — | 25,093 | Sep 16, 2026 · 4:10 pm EDT | Form 4 |
| Edward J ZanderDirector | 8,094 | 16,698 | 24,792 | Oct 22, 2018 · 6:06 pm EDT | Form 4 |
| Kristen M OnkenDirector | 23,729 | — | 23,729 | Oct 20, 2016 · 4:14 pm EDT | Form 4 |
| David H Morton Jr.EVP & CFO | 23,346 | — | 23,346 | Jul 27, 2018 · 7:35 pm EDT | Form 4 |
| John Christopher MorrisEVP & CTO | 22,693 | — | 22,693 | Sep 22, 2026 · 4:49 pm EDT | Form 4 |
| Mei Wei ChengDirector | 20,047 | — | 20,047 | Oct 22, 2018 · 5:22 pm EDT | Form 4 |
| James J LernerPresident, Cloud Systems | 17,858 | — | 17,858 | Mar 13, 2015 · 5:30 pm EDT | Form 4 |
| Regan J MacPhersonSVP and General Counsel | 16,702 | — | 16,702 | Nov 18, 2016 · 5:53 pm EST | Form 4 |
| Stephanie TileniusDirector | 16,605 | — | 16,605 | Oct 22, 2018 · 5:25 pm EDT | Form 4 |
| Philip G BraceFormer President, CSSG | 16,069 | — | 16,069 | Jan 16, 2018 · 8:19 pm EST | Form 4 |
| William T Coleman IIIDirector | 15,100 | — | 15,100 | Oct 22, 2018 · 5:30 pm EDT | Form 4 |
| Jay L GeldmacherDirector | 9,420 | — | 9,420 | Oct 22, 2018 · 5:29 pm EDT | Form 4 |
| Mark AdamsDirector | 8,680 | — | 8,680 | Oct 22, 2018 · 5:21 pm EDT | Form 4 |
| Judy BrunerDirector | 5,285 | 3,382 | 8,667 | Oct 31, 2018 · 5:41 pm EDT | Form 4 |
| Geraldine Hottier-FayonInterim Prin. Accounting Ofcr | 8,217 | — | 8,217 | Sep 25, 2018 · 7:00 pm EDT | Form 4 |
| Shankar ArumugaveluDirector | 6,626 | — | 6,626 | Jun 4, 2026 · 4:59 pm EDT | Form 4 |
| Ban Seng TehEVP & Chief Commercial Officer | 5,810 | — | 5,810 | Sep 16, 2026 · 4:10 pm EDT | Form 4 |
| Gregorio ReyesDirector | 0 | 4,485 | 4,485 | Oct 23, 2015 · 5:18 pm EDT | Form 4 |
| Kathryn R. ScolnickInterim CFO | 4,256 | — | 4,256 | Sep 25, 2018 · 7:08 pm EDT | Form 4 |
| Yolanda Lee ConyersDirector | 3,351 | — | 3,351 | Sep 3, 2026 · 4:51 pm EDT | Form 4 |
| James CI LeeEVP & CLO | 347 | — | 347 | Aug 26, 2026 · 4:21 pm EDT | Form 4 |
| David K RicharzExecutive Vice President,Sales | 319 | — | 319 | Apr 28, 2015 · 4:08 pm EDT | Form 4 |
| Dambisa F MoyoDirector | 0 | — | 0 | Oct 25, 2017 · 7:47 pm EDT | Form 4 |
| James J MurphyEVP, Sales & Marketing | 0 | — | 0 | Feb 19, 2019 · 7:13 pm EST | Form 4 |
Balances come from each insider’s most recent filing that reports a Table I holding; an insider who left the company years ago still appears with their last-known figure and its date. Indirect totals collapse multiple vehicles (trusts, LLCs) into one number — open the filing for the breakdown. Shares as filed, not split-adjusted.