Quick Takeaways
- STX - Seagate Technology Holdings plc has 25 insiders with reported activity on this page.
- Net insider value flow over the last year: -$156,384,063.
- Recent transaction rows are available for direct filing-level review.
- Info
- Insider Trading
- Financials
- Holders: STX, STX
Insider Transactions Reported by 25 Insiders of Seagate Technology Holdings plc
- Symbol
- STX on Nasdaq
- Location
- Singapore, Singapore
What Changed
- Buy value: ; sell value: $156,384,062.
- Net share flow: <span class="text-red-600">-765,229</span>.
Why This Matters
- This page gives a plain-language issuer insider context before you inspect transaction-level evidence.
- Use the filing links below to verify timestamps, codes, and ownership impacts directly from SEC forms.
Official SEC Source
Insider trading overview
Last 12 monthsNet insider flow leans to selling over the last 12 months. Net value: -$156,384,063.
Buys
$0
Shares: 0
Insiders: 0
Sells
$156,384,063
Shares: 765,229
Insiders: 12
Net
-$156,384,063
Shares: -765,229
Insiders: -12
| Window (months) | Buy shares | Sell shares | Buy $ | Sell $ | Net $ |
|---|---|---|---|---|---|
| 0-3 | 0 | 114,737 | $0 | $47,569,719 | +$47,569,719 |
| 3-6 | 0 | 149,789 | $0 | $41,587,454 | +$41,587,454 |
| 6-9 | 0 | 103,466 | $0 | $19,199,226 | +$19,199,226 |
| 9-12 | 0 | 397,237 | $0 | $48,027,663 | +$48,027,663 |
Seagate Technology Holdings plc executives and other stock owners filed with the SEC include:
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| ValueAct Holdings, L.P. | Director, Other* | $1,142,150,950 | Mixed | 17 Feb 2022 | ||
| William D. Mosley | CEO, Director | $152,182,280 | -$88,558,683 | -37% | Filing P/S | 01 Apr 2026 |
| Gianluca Romano | Evp & Cfo | $27,767,375 | -$23,626,538 | -46% | Mixed | 11 Mar 2026 |
| Stephen J. Luczo | Director | $19,204,985 | Mixed | 04 Mar 2022 | ||
| Jeffrey D. Nygaard | EVP, Operations and Technology | $8,683,090 | Mixed | 01 Feb 2023 | ||
| Richard L. Clemmer | Director | $7,608,125 | Mixed | 25 Oct 2025 | ||
| John C. Morris | Evp & Cto | $6,635,395 | -$3,258,252 | -33% | Filing P/S | 13 Mar 2026 |
| Ban Seng Teh | EVP & Chief Commercial Officer | $4,780,400 | -$26,497,956 | -85% | Mixed | 11 Mar 2026 |
| Michael R. Cannon | Director | $4,654,423 | -$2,878,646 | -38% | Mixed | 25 Oct 2025 |
| Edward J. Zander | Director | $3,894,105 | Mixed | 23 Oct 2023 | ||
| Ravi Naik | EVP, Lyve Storage Services | $3,302,845 | Mixed | 22 Mar 2023 | ||
| Dylan G. Haggart | Director | $3,271,681 | Mixed | 25 Oct 2025 | ||
| Stephanie Tilenius | Director | $3,261,979 | -$889,886 | -21% | Filing P/S | 03 Nov 2025 |
| Judy Bruner | Director | $3,226,375 | -$1,135,559 | -26% | Mixed | 19 Oct 2025 |
| Prat Bhatt | Director | $3,126,072 | Mixed | 25 Oct 2025 | ||
| Katherine Schuelke | SVP, CLO & Corporate Secretary | $2,470,355 | Mixed | 09 Dec 2023 | ||
| Shankar Arumugavelu | Director | $2,246,352 | -$1,472,825 | -40% | Filing P/S | 10 Nov 2025 |
| Yolanda Lee Conyers | Director | $1,909,305 | -$714,232 | -27% | Filing P/S | 02 Mar 2026 |
| Jeffrey D. Fochtman | SVP, Business & Marketing | $1,252,560 | Mixed | 12 Sep 2022 | ||
| Robert A. Bruggeworth | Director | $738,983 | Mixed | 19 Oct 2024 | ||
| Kian Fatt Chong | EVP Global Operations | $535,075 | -$5,074,098 | -90% | Mixed | 11 Mar 2026 |
| Mark Adams | Director | $461,168 | Mixed | 25 Oct 2025 | ||
| Jay L. Geldmacher | Director | $99,909 | -$1,127,048 | -92% | Filing P/S | 30 Jan 2026 |
| James C. Lee | Evp & Clo | $89,654 | -$1,150,340 | -93% | Filing P/S | 26 Jan 2026 |
| Thomas A. Szlosek | Director | $83,580 | Mixed | 25 Oct 2025 |
Top shareholders of Seagate Technology Holdings plc (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Ownership % is shown only when it is directly reported or safely comparable across share classes.
Methodology: rows are grouped by holder and ranked by the holder's primary source value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
| Holder | Source | Role / Reporting | Ownership % | Shares | Holdings Value | 12M Net Δ | As of | Details |
|---|---|---|---|---|---|---|---|---|
| VANGUARD GROUP INC |
13F
|
Company |
13%
|
28,119,431
|
$7,743,810,104 | — | 31 Dec 2025 | |
| Sanders Capital, LLC |
13F
13D/G
|
Company |
8.9%
from 13D/G
|
17,180,892
|
$4,731,445,848 | — | 31 Dec 2025 | |
| BlackRock, Inc. |
13F
13D/G
|
Company |
6.1%
from 13D/G
|
16,116,926
|
$4,438,440,190 | — | 31 Dec 2025 | |
| STATE STREET CORP |
13F
|
Company |
4.3%
|
9,370,805
|
$2,587,534,836 | — | 31 Dec 2025 | |
| JPMORGAN CHASE & CO |
13D/G
13F
|
Company |
4%
|
8,654,624
|
$2,043,010,541 | -$783,578,980 | 31 Oct 2025 | |
| DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main |
13F
|
Company |
2.5%
|
5,416,242
|
$1,491,578,884 | — | 31 Dec 2025 | |
| MORGAN STANLEY |
13F
|
Company |
2.5%
|
5,317,516
|
$1,464,391,492 | — | 31 Dec 2025 | |
| WCM INVESTMENT MANAGEMENT, LLC |
13F
|
Company |
2.4%
|
5,154,872
|
$1,443,776,642 | — | 31 Dec 2025 | |
| GEODE CAPITAL MANAGEMENT, LLC |
13F
|
Company |
2.3%
|
4,896,815
|
$1,343,682,936 | — | 31 Dec 2025 | |
| Capital Research Global Investors |
13F
13D/G
|
Company |
3.4%
from 13D/G
|
4,511,989
|
$1,242,556,651 | — | 31 Dec 2025 | |
| BANK OF AMERICA CORP /DE/ |
13F
|
Company |
2%
|
4,280,605
|
$1,178,836,003 | — | 31 Dec 2025 | |
| ValueAct Holdings, L.P. |
3/4/5
|
Director, Other* |
—
class O/S missing
|
13,437,070
|
$1,142,150,950 | — | 17 Feb 2022 | |
| FRANKLIN RESOURCES INC |
13F
|
Company |
1.9%
|
4,026,126
|
$1,108,754,931 | — | 31 Dec 2025 | |
| FMR LLC |
13F
|
Company |
1.7%
|
3,759,659
|
$1,035,372,166 | — | 31 Dec 2025 | |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP |
13F
|
Company |
1.5%
|
3,193,063
|
$879,337,620 | — | 31 Dec 2025 | |
| GOLDMAN SACHS GROUP INC |
13F
|
Company |
1.3%
|
2,755,671
|
$758,884,218 | — | 31 Dec 2025 | |
| Invesco Ltd. |
13F
|
Company |
1.2%
|
2,558,925
|
$704,702,348 | — | 31 Dec 2025 | |
| MASSACHUSETTS FINANCIAL SERVICES CO /MA/ |
13F
|
Company |
0.93%
|
2,008,516
|
$553,125,222 | — | 31 Dec 2025 | |
| NORTHERN TRUST CORP |
13F
|
Company |
0.88%
|
1,900,632
|
$523,415,048 | — | 31 Dec 2025 | |
| NORGES BANK |
13F
|
Company |
0.84%
|
1,809,661
|
$498,362,543 | — | 31 Dec 2025 | |
| DEUTSCHE BANK AG\ |
13F
|
Company |
0.74%
|
1,599,962
|
$440,613,535 | — | 31 Dec 2025 | |
| Legal & General Group Plc |
13F
|
Company |
0.7%
|
1,524,131
|
$419,730,430 | — | 31 Dec 2025 | |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC |
13F
|
Company |
0.68%
|
1,480,324
|
$407,666,428 | — | 31 Dec 2025 | |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC |
13F
|
Company |
0.64%
|
1,377,792
|
$379,430,139 | — | 31 Dec 2025 | |
| Bank of New York Mellon Corp |
13F
|
Company |
0.57%
|
1,241,951
|
$342,020,930 | — | 31 Dec 2025 | |
| Polar Capital Holdings Plc |
13F
|
Company |
0.57%
|
1,229,410
|
$338,567,220 | — | 31 Dec 2025 | |
| PRICE T ROWE ASSOCIATES INC /MD/ |
13F
|
Company |
0.54%
|
1,163,201
|
$320,335,000 | — | 31 Dec 2025 | |
| ROYAL BANK OF CANADA |
13F
|
Company |
0.48%
|
1,034,384
|
$284,860,000 | — | 31 Dec 2025 | |
| National Pension Service |
13F
|
Company |
0.46%
|
997,223
|
$274,625,242 | — | 31 Dec 2025 | |
| Russell Investments Group, Ltd. |
13F
|
Company |
0.44%
|
956,707
|
$263,819,827 | — | 31 Dec 2025 | |
| CANADA PENSION PLAN INVESTMENT BOARD |
13F
|
Company |
0.42%
|
909,394
|
$250,438,014 | — | 31 Dec 2025 | |
| DIMENSIONAL FUND ADVISORS LP |
13F
|
Company |
0.42%
|
899,066
|
$247,637,420 | — | 31 Dec 2025 | |
| AQR CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.39%
|
852,472
|
$234,762,314 | — | 31 Dec 2025 | |
| BNP PARIBAS FINANCIAL MARKETS |
13F
|
Company |
0.38%
|
821,811
|
$226,318,531 | — | 31 Dec 2025 | |
| Castle Hook Partners LP |
13F
|
Company |
0.37%
|
802,414
|
$220,976,792 | — | 31 Dec 2025 | |
| D. E. Shaw & Co., Inc. |
13F
|
Company |
0.37%
|
796,472
|
$219,340,424 | — | 31 Dec 2025 | |
| BANK OF MONTREAL /CAN/ |
13F
|
Company |
0.37%
|
794,043
|
$218,671,502 | — | 31 Dec 2025 | |
| Nuveen, LLC |
13F
|
Company |
0.36%
|
780,601
|
$214,969,589 | — | 31 Dec 2025 | |
| BARCLAYS PLC |
13F
|
Company |
0.36%
|
779,811
|
$214,752,151 | — | 31 Dec 2025 | |
| Holocene Advisors, LP |
13F
|
Company |
0.35%
|
759,114
|
$209,052,404 | — | 31 Dec 2025 | |
| Atalan Capital Partners, LP |
13F
|
Company |
0.35%
|
746,600
|
$205,606,174 | — | 31 Dec 2025 | |
| Amundi |
13F
|
Individual |
0.34%
|
730,206
|
$201,089,399 | — | 31 Dec 2025 | |
| Egerton Capital (UK) LLP |
13F
|
Company |
0.34%
|
729,325
|
$200,848,812 | — | 31 Dec 2025 | |
| ACADIAN ASSET MANAGEMENT LLC |
13F
|
Company |
0.31%
|
670,900
|
$184,728,000 | — | 31 Dec 2025 | |
| Maple Rock Capital Partners Inc. |
13F
|
Company |
0.31%
|
665,852
|
$183,368,982 | — | 31 Dec 2025 | |
| KBC Group NV |
13F
|
Company |
0.3%
|
638,613
|
$175,868,000 | — | 31 Dec 2025 | |
| Boston Partners |
13F
|
Company |
0.28%
|
610,811
|
$168,280,057 | — | 31 Dec 2025 | |
| LOS ANGELES CAPITAL MANAGEMENT LLC |
13F
|
Company |
0.28%
|
610,610
|
$163,848,035 | — | 31 Dec 2025 | |
| Swiss National Bank |
13F
|
Company |
0.27%
|
583,500
|
$160,690,065 | — | 31 Dec 2025 | |
| FIRST TRUST ADVISORS LP |
13F
|
Company |
0.26%
|
559,305
|
$154,026,882 | — | 31 Dec 2025 |
Recent Insider Transactions by Companies or Individuals for Seagate Technology Holdings plc
Showing up to 300 most recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | Value $ | * Price $ | Shares | Shares Owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| William D. Mosley | STX | Ordinary Shares | Sale | -5.32% | $8,414,638 | $420.73 | -20,000 | 355,591 | 01 Apr 2026 | Direct |
| William D. Mosley | STX | Ordinary Shares | Sale | -6.14% | $10,000,034 | $406.77 | -24,584 | 375,591 | 19 Mar 2026 | Direct |
| John C. Morris | STX | Ordinary Shares | Sale | -0.63% | $42,273 | $377.44 | -112 | 17,580 | 13 Mar 2026 | Direct |
| Ban Seng Teh | STX | Ordinary Shares | Options Exercise | 9.64% | 989 | 11,248 | 11 Mar 2026 | Direct | ||
| Ban Seng Teh | STX | Restricted Share Unit | Options Exercise | -14.3% | -989 | 5,934 | 11 Mar 2026 | Direct | ||
| Gianluca Romano | STX | Ordinary Shares | Tax liability | -1.28% | -847 | 65,335 | 11 Mar 2026 | Direct | ||
| Gianluca Romano | STX | Ordinary Shares | Options Exercise | 2.63% | 1,695 | 66,182 | 11 Mar 2026 | Direct | ||
| Gianluca Romano | STX | Restricted Share Unit | Options Exercise | -14.3% | -1,695 | 10,170 | 11 Mar 2026 | Direct | ||
| Kian Fatt Chong | STX | Ordinary Shares | Options Exercise | 116.7% | 678 | 1,259 | 11 Mar 2026 | Direct | ||
| Kian Fatt Chong | STX | Restricted Share Unit | Options Exercise | -14.3% | -678 | 4,070 | 11 Mar 2026 | Direct | ||
| John C. Morris | STX | Ordinary Shares | Tax liability | -2.37% | -430 | 17,692 | 11 Mar 2026 | Direct | ||
| John C. Morris | STX | Ordinary Shares | Options Exercise | 5.48% | 942 | 18,122 | 11 Mar 2026 | Direct | ||
| John C. Morris | STX | Restricted Share Unit | Options Exercise | -14.3% | -942 | 5,652 | 11 Mar 2026 | Direct | ||
| William D. Mosley | STX | Ordinary Shares | Tax liability | -0.41% | -1,658 | 400,175 | 11 Mar 2026 | Direct | ||
| William D. Mosley | STX | Ordinary Shares | Options Exercise | 0.83% | 3,319 | 401,833 | 11 Mar 2026 | Direct | ||
| William D. Mosley | STX | Restricted Share Unit | Options Exercise | -14.3% | -3,319 | 19,914 | 11 Mar 2026 | Direct | ||
| John C. Morris | STX | Ordinary Shares | Tax liability | -2.97% | -516 | 16,837 | 09 Mar 2026 | Direct | ||
| John C. Morris | STX | Ordinary Shares | Options Exercise | 6.92% | 1,130 | 17,468 | 09 Mar 2026 | Direct | ||
| John C. Morris | STX | Restricted Share Unit | Options Exercise | -53.1% | -1,130 | 999 | 09 Mar 2026 | Direct | ||
| Gianluca Romano | STX | Ordinary Shares | Tax liability | -1.9% | -1,236 | 63,729 | 09 Mar 2026 | Direct | ||
| Gianluca Romano | STX | Ordinary Shares | Options Exercise | 3.94% | 2,473 | 65,244 | 09 Mar 2026 | Direct | ||
| Gianluca Romano | STX | Restricted Share Unit | Options Exercise | -56.3% | -2,473 | 1,918 | 09 Mar 2026 | Direct | ||
| William D. Mosley | STX | Ordinary Shares | Tax liability | -0.65% | -2,613 | 397,306 | 09 Mar 2026 | Direct | ||
| William D. Mosley | STX | Ordinary Shares | Options Exercise | 1.33% | 5,230 | 399,721 | 09 Mar 2026 | Direct | ||
| William D. Mosley | STX | Restricted Share Unit | Options Exercise | -48.2% | -5,230 | 5,630 | 09 Mar 2026 | Direct | ||
| Kian Fatt Chong | STX | Ordinary Shares | Options Exercise | 581 | 581 | 09 Mar 2026 | Direct | |||
| Kian Fatt Chong | STX | Restricted Share Unit | Options Exercise | -59% | -581 | 404 | 09 Mar 2026 | Direct | ||
| Ban Seng Teh | STX | Ordinary Shares | Options Exercise | 14% | 1,262 | 10,259 | 09 Mar 2026 | Direct | ||
| Ban Seng Teh | STX | Restricted Share Unit | Options Exercise | -51.3% | -1,262 | 1,199 | 09 Mar 2026 | Direct | ||
| William D. Mosley | STX | Ordinary Shares | Sale | -4.81% | $7,695,262 | $384.76 | -20,000 | 395,897 | 02 Mar 2026 | Direct |
| Yolanda Lee Conyers | STX | Ordinary Shares | Sale | -13.4% | $295,192 | $393.59 | -750 | 4,851 | 02 Mar 2026 | Direct |
| John C. Morris | STX | Ordinary Shares | Sale | -1.43% | $98,400 | $410.00 | -240 | 16,566 | 24 Feb 2026 | Direct |
| Kian Fatt Chong | STX | Ordinary Shares | Sale | -100% | $2,434,740 | $416.48 | -5,846 | 0 | 23 Feb 2026 | Direct |
| Gianluca Romano | STX | Ordinary Shares | Tax liability | -10.1% | -7,096 | 63,250 | 22 Feb 2026 | Direct | ||
| Gianluca Romano | STX | Ordinary Shares | Options Exercise | 24.9% | 14,043 | 70,346 | 22 Feb 2026 | Direct | ||
| Gianluca Romano | STX | Restricted Share Unit | Options Exercise | -100% | -14,043 | 0 | 22 Feb 2026 | Direct | ||
| Ban Seng Teh | STX | Ordinary Shares | Options Exercise | 191% | 5,905 | 8,997 | 20 Feb 2026 | Direct | ||
| Ban Seng Teh | STX | Performance-Based Restricted Share Units | Options Exercise | -100% | -5,905 | 0 | 20 Feb 2026 | Direct | ||
| Gianluca Romano | STX | Ordinary Shares | Tax liability | -9.59% | -5,975 | 56,303 | 20 Feb 2026 | Direct | ||
| Gianluca Romano | STX | Ordinary Shares | Options Exercise | 23.4% | 11,807 | 62,278 | 20 Feb 2026 | Direct | ||
| Gianluca Romano | STX | Performance-Based Restricted Share Units | Options Exercise | -100% | -11,807 | 0 | 20 Feb 2026 | Direct | ||
| Kian Fatt Chong | STX | Ordinary Shares | Options Exercise | 312% | 4,427 | 5,846 | 20 Feb 2026 | Direct | ||
| Kian Fatt Chong | STX | Performance-Based Restricted Share Units | Options Exercise | -100% | -4,427 | 0 | 20 Feb 2026 | Direct | ||
| William D. Mosley | STX | Ordinary Shares | Tax liability | -1.41% | -5,966 | 415,897 | 20 Feb 2026 | Direct | ||
| William D. Mosley | STX | Ordinary Shares | Options Exercise | 2.88% | 11,807 | 421,863 | 20 Feb 2026 | Direct | ||
| William D. Mosley | STX | Performance-Based Restricted Share Units | Options Exercise | -100% | -11,807 | 0 | 20 Feb 2026 | Direct | ||
| John C. Morris | STX | Ordinary Shares | Tax liability | -10.8% | -2,032 | 16,806 | 20 Feb 2026 | Direct | ||
| John C. Morris | STX | Ordinary Shares | Options Exercise | 30.7% | 4,427 | 18,838 | 20 Feb 2026 | Direct | ||
| John C. Morris | STX | Performance-Based Restricted Share Units | Options Exercise | -100% | -4,427 | 0 | 20 Feb 2026 | Direct | ||
| William D. Mosley | STX | Ordinary Shares | Sale | -4.65% | $8,585,359 | $429.27 | -20,000 | 410,056 | 02 Feb 2026 | Direct |
* An asterisk sign (*) next to the price indicates that the price is likely invalid.