Seagate Technology Holdings plc
STX- Exchange
- Nasdaq
- Industry
- Computer Storage Devices
- SEC CIK
- 0001137789
In the last 90 days, Seagate Technology Holdings plc insiders filed 0 open-market purchases and 29 sales; 1,983 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.
Holders of 5% or more of STX
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Seagate Technology Holdings plc, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Vanguard Capital Management LLC | 13G | 7.48%16.3M shares | New | Apr 30, 20261 filing | Apr 30, 2026 | SEC |
| BlackRock, Inc. | 13G/A | 6.10%13.0M shares | – | Apr 23, 20251 filing | Apr 23, 2025 | SEC |
| FMR LLC | 13G | 5.10%11.5M shares | – | Feb 8, 20214 filings | Nov 5, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
45 Schedule 13D and 13G filings on Seagate Technology Holdings plc, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Nov 5, 20261:24 PM ET | FMR LLCand 1 other | 13G | 5.10%11.5M shares | – | Sep 30, 2026 | SEC |
| Aug 5, 20263:12 PM ET | Sanders Capital, LLCand 1 other | 13G/A | 1.56%3.50M shares | −4.42 ppfrom 5.98%Below 5% | Jun 30, 2026 | SEC |
| Jul 31, 202611:39 AM ET | Vanguard Portfolio Management LLC | 13G/A | 3.56%8.00M shares | −1.52 ppfrom 5.08%Below 5% | Jun 30, 2026 | SEC |
| Apr 30, 20261:12 PM ET | Vanguard Capital Management LLC | 13G | 7.48%16.3M shares | New | Mar 31, 2026 | SEC |
| Apr 29, 20263:12 PM ET | Vanguard Portfolio Management LLC | 13G | 5.08%11.1M shares | New | Mar 31, 2026 | SEC |
| Apr 16, 20267:17 AM ET | Sanders Capital, LLCand 1 other | 13G/A | 5.98%13.0M shares | −2.95 ppfrom 8.93% | Mar 31, 2026 | SEC |
| Mar 27, 20261:01 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | −13.22 ppfrom 13.22%Below 5% | Mar 13, 2026 | SEC |
| Nov 4, 202510:48 AM ET | JPMorgan Chase & Co | 13G/A | 4.00%8.65M shares | −1.60 ppfrom 5.60%Below 5% | Oct 31, 2025 | SEC |
| Oct 31, 20259:48 AM ET | JPMorgan Chase & Co | 13G/A | 5.60%12.0M shares | −2.80 ppfrom 8.40% | Sep 30, 2025 | SEC |
| Aug 13, 202511:37 AM ET | Capital Research Global Investors | 13G/A | 3.40%7.29M shares | −4.00 ppfrom 7.40%Below 5% | Jun 30, 2025 | SEC |
| Jul 22, 20251:51 PM ET | JPMorgan Chase & Co | 13G/A | 8.40%17.9M shares | −1.70 ppfrom 10.10% | Jun 30, 2025 | SEC |
| May 14, 20255:33 PM ET | Sanders Capital, LLCand 1 other | 13G/A | 8.93%18.9M shares | – | Mar 31, 2025 | SEC |
| May 5, 20252:03 PM ET | JPMorgan Chase & Co | 13G/A | 10.10%21.6M shares | +1.20 ppfrom 8.90% | Apr 30, 2025 | SEC |
| Apr 23, 20258:00 PM ET | BlackRock, Inc. | 13G/A | 6.10%13.0M shares | – | Mar 31, 2025 | SEC |
| Apr 22, 202512:01 PM ET | JPMorgan Chase & Co | 13G/A | 8.90%18.9M shares | +1.00 ppfrom 7.90% | Mar 31, 2025 | SEC |
| Feb 13, 20252:14 PM ET | Capital Research Global Investors | 13G | 7.40%15.6M shares | – | Dec 31, 2024 | SEC |
| Feb 12, 20253:07 PM ET | JPMorgan Chase & Co | 13G/A | 7.90%16.8M shares | – | Dec 31, 2024 | SEC |
| Jan 31, 20259:54 AM ET | Vanguard Group Inc | 13G/A | 13.22%28.0M shares | – | Dec 31, 2024 | SEC |
| Nov 12, 2024 | Capital Research Global Investors | 13G/AOld format | – | – | – | SEC |
| Nov 12, 2024 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Mar 7, 2024 | JPMorgan Chase & Co | 13G/AOld format | – | – | – | SEC |
| Feb 14, 2024 | Sanders Capital, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 13, 2024 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2024 | Capital Research Global Investors | 13GOld format | – | New | – | SEC |
| Feb 9, 2024 | FMR LLC | 13GOld format | – | – | – | SEC |
| Feb 6, 20249:36 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 25, 2024 | JPMorgan Chase & Co | 13G/AOld format | – | – | – | SEC |
| Jan 25, 2024 | JPMorgan Chase & Co | 13G/AOld format | – | – | – | SEC |
| Sep 8, 2023 | VA Partners I, LLC | 13D/AOld format | – | – | – | SEC |
| Sep 1, 2023 | VA Partners I, LLC | 13D/AOld format | – | – | – | SEC |
| Feb 17, 2023 | Sanders Capital, LLC | 13GOld format | – | New | – | SEC |
| Feb 9, 2023 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 1, 20234:54 PM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
| Jan 27, 2023 | JPMorgan Chase & Co | 13G/AOld format | – | – | – | SEC |
| Feb 22, 2022 | VA Partners I, LLC | 13D/AOld format | – | – | – | SEC |
| Feb 10, 2022 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2022 | Clearbridge Investments, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 4, 20224:12 PM ET | BlackRock Inc. | 13GOld format | – | – | – | SEC |
| Jan 28, 2022 | JPMorgan Chase & Co | 13GOld format | – | New | – | SEC |
| May 4, 2021 | VA Partners I, LLC | 13D/AOld format | – | – | – | SEC |
| Mar 5, 2021 | VA Partners I, LLC | 13D/AOld format | – | – | – | SEC |
| Feb 11, 2021 | Clearbridge Investments, LLC | 13G/AOld format | – | – | – | SEC |
| Feb 10, 2021 | Vanguard Group Inc | 13G/AOld format | – | – | – | SEC |
| Feb 8, 2021 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Feb 1, 20218:17 AM ET | BlackRock Inc. | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
161 notices from officers, directors and other affiliates planning to sell Seagate Technology Holdings plc shares, newest first.
| Filed (ET) | Seller | Shares to sell | Market value | Planned sale | Broker | Filing |
|---|---|---|---|---|---|---|
| Oct 23, 20266:46 PM ET | Lee James CIOfficer | 600 | $379.8K | Oct 23, 2026 | Morgan Stanley | SEC |
| Sep 21, 20264:34 PM ET | John C MorrisOfficer | 14.8K | $12.8M | Sep 21, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 15, 20268:03 PM ET | Romano GianlucaOfficer | 52.5K | $40.5M | Sep 15, 2026 | Morgan Stanley | SEC |
| Sep 15, 20267:56 PM ET | Mosley William DOfficer · Director | 102.8K | $79.4M | Sep 15, 2026 | Morgan Stanley | SEC |
| Sep 15, 20267:46 PM ET | Morris John ChristopherOfficer | 16.2K | $12.5M | Sep 15, 2026 | Morgan Stanley | SEC |
| Sep 15, 20264:21 PM ET | Ban Seng TehOfficer | 52.7K | $41.2M | Sep 15, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 14, 20268:06 PM ET | Morris John ChristopherOfficer | 518 | $404.4K | Sep 14, 2026 | Morgan Stanley | SEC |
| Sep 14, 20268:03 PM ET | Romano GianlucaOfficer | 1.00K | $783.4K | Sep 14, 2026 | Morgan Stanley | SEC |
| Sep 14, 20267:57 PM ET | Mosley William DOfficer · Director | 1.96K | $1.53M | Sep 14, 2026 | Morgan Stanley | SEC |
| Sep 14, 20264:38 PM ET | Ban Seng TehOfficer | 989 | $770.4K | Sep 14, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 11, 20264:32 PM ET | Gianluca RomanoOfficer | 50.5K | $43.5M | Sep 11, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 10, 20267:40 PM ET | Morris John ChristopherOfficer | 601 | $518.0K | Sep 10, 2026 | Morgan Stanley | SEC |
| Sep 10, 20267:36 PM ET | Mosley William DOfficer · Director | 2.99K | $2.58M | Sep 10, 2026 | Morgan Stanley | SEC |
| Sep 10, 20267:28 PM ET | Romano GianlucaOfficer | 1.42K | $1.22M | Sep 10, 2026 | Morgan Stanley | SEC |
| Sep 10, 20264:04 PM ET | Ban Seng TehOfficer | 663 | $570.2K | Sep 10, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 1, 20264:41 PM ET | William D. MosleyDirector · Officer | 90.0K | $74.6M | Sep 1, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Sep 1, 20264:39 PM ET | Yolanda ConyersDirector | 750 | $621.3K | Sep 1, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 24, 20264:31 PM ET | James LeeOfficer | 9.01K | $7.66M | Aug 24, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 21, 20267:40 PM ET | Morris John ChristopherOfficer | 3.58K | $3.04M | Aug 21, 202610b5-1 | Morgan Stanley | SEC |
| Aug 21, 20267:34 PM ET | Mosley William DOfficer · Director | 18.2K | $15.5M | Aug 21, 202610b5-1 | Morgan Stanley | SEC |
| Aug 21, 20267:20 PM ET | Lee James CIOfficer | 4.00K | $3.40M | Aug 21, 202610b5-1 | Morgan Stanley | SEC |
| Aug 21, 20267:17 PM ET | Romano GianlucaOfficer | 9.13K | $7.76M | Aug 21, 202610b5-1 | Morgan Stanley | SEC |
| Aug 21, 20264:33 PM ET | Ban Seng TehOfficer | 9.86K | $8.41M | Aug 21, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 20, 20264:35 PM ET | John MorrisOfficer | 523 | $435.4K | Aug 20, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
| Aug 20, 20264:03 PM ET | Ban Seng TehOfficer | 6.05K | $5.10M | Aug 20, 202610b5-1 | Morgan Stanley Smith Barney LLC Executive Financial Services | SEC |
Showing the latest 25. See the STX notices from the last 12 months