Insider Transactions in Q4 2025 at Seagate Technology Holdings PLC (STX)
Insider Transaction List (Q4 2025)
| Date | Insider | Transaction | Ownership Type | Shares Traded | Value / Price |
|---|---|---|---|---|---|
|
Dec 15
2025
|
John Christopher Morris EVP & CTO |
SELL
Open market or private sale
|
Direct |
113
-0.79%
|
$32,883
$291.89 P/Share
|
|
Dec 11
2025
|
William D Mosley CEO |
SELL
Payment of exercise price or tax liability
|
Direct |
1,678
-0.37%
|
$515,146
$307.85 P/Share
|
|
Dec 11
2025
|
William D Mosley CEO |
BUY
Exercise of conversion of derivative security
|
Direct |
3,319
+0.73%
|
-
|
|
Dec 11
2025
|
Ban Seng Teh EVP & Chief Commercial Officer |
SELL
Open market or private sale
|
Direct |
2,010
-12.8%
|
$592,950
$295.9 P/Share
|
|
Dec 11
2025
|
Ban Seng Teh EVP & Chief Commercial Officer |
BUY
Exercise of conversion of derivative security
|
Direct |
2,400
+5.08%
|
$105,600
$44.38 P/Share
|
|
Dec 11
2025
|
John Christopher Morris EVP & CTO |
SELL
Payment of exercise price or tax liability
|
Direct |
430
-2.91%
|
$132,010
$307.85 P/Share
|
|
Dec 11
2025
|
John Christopher Morris EVP & CTO |
BUY
Exercise of conversion of derivative security
|
Direct |
941
+5.98%
|
-
|
|
Dec 11
2025
|
Kian Fatt Chong EVP Global Operations |
BUY
Exercise of conversion of derivative security
|
Direct |
678
+35.02%
|
-
|
|
Dec 11
2025
|
Gianluca Romano EVP & CFO |
SELL
Payment of exercise price or tax liability
|
Direct |
857
-1.67%
|
$263,099
$307.85 P/Share
|
|
Dec 11
2025
|
Gianluca Romano EVP & CFO |
BUY
Exercise of conversion of derivative security
|
Direct |
1,695
+3.2%
|
-
|
|
Dec 09
2025
|
Gianluca Romano EVP & CFO |
SELL
Payment of exercise price or tax liability
|
Direct |
1,251
-1.25%
|
$352,782
$282.86 P/Share
|
|
Dec 09
2025
|
Gianluca Romano EVP & CFO |
BUY
Exercise of conversion of derivative security
|
Direct |
2,473
+2.42%
|
-
|
|
Dec 09
2025
|
John Christopher Morris EVP & CTO |
SELL
Payment of exercise price or tax liability
|
Direct |
516
-1.85%
|
$145,512
$282.86 P/Share
|
|
Dec 09
2025
|
John Christopher Morris EVP & CTO |
BUY
Exercise of conversion of derivative security
|
Direct |
1,130
+3.89%
|
-
|
|
Dec 09
2025
|
Kian Fatt Chong EVP Global Operations |
BUY
Exercise of conversion of derivative security
|
Direct |
580
+44.76%
|
-
|
|
Dec 09
2025
|
Ban Seng Teh EVP & Chief Commercial Officer |
BUY
Exercise of conversion of derivative security
|
Direct |
1,262
+4.64%
|
-
|
|
Dec 09
2025
|
William D Mosley CEO |
SELL
Payment of exercise price or tax liability
|
Direct |
2,644
-0.29%
|
$745,608
$282.86 P/Share
|
|
Dec 09
2025
|
William D Mosley CEO |
BUY
Exercise of conversion of derivative security
|
Direct |
5,230
+0.58%
|
-
|
|
Dec 02
2025
|
Yolanda Lee Conyers Director |
SELL
Open market or private sale
|
Direct |
750
-11.81%
|
$204,000
$272.91 P/Share
|
|
Dec 01
2025
|
William D Mosley CEO |
SELL
Open market or private sale
|
Direct |
20,000
-0.55%
|
$5,400,000
$270.87 P/Share
|
|
Nov 13
2025
|
Gianluca Romano EVP & CFO |
SELL
Open market or private sale
|
Direct |
8,002
-1.17%
|
$2,136,534
$267.76 P/Share
|
|
Nov 12
2025
|
Gianluca Romano EVP & CFO |
SELL
Open market or private sale
|
Direct |
54,021
-3.86%
|
$15,504,027
$287.69 P/Share
|
|
Nov 12
2025
|
Gianluca Romano EVP & CFO |
BUY
Exercise of conversion of derivative security
|
Direct |
52,529
+12.79%
|
$4,202,320
$80.45 P/Share
|
|
Nov 11
2025
|
Ban Seng Teh EVP & Chief Commercial Officer |
SELL
Open market or private sale
|
Direct |
1,412
-10.5%
|
$406,656
$288.98 P/Share
|
|
Nov 11
2025
|
Ban Seng Teh EVP & Chief Commercial Officer |
BUY
Exercise of conversion of derivative security
|
Direct |
1,412
+5.1%
|
$93,192
$66.57 P/Share
|
|
Nov 11
2025
|
James Ci Lee EVP & CLO |
SELL
Open market or private sale
|
Direct |
697
-73.06%
|
$200,736
$288.98 P/Share
|
|
Nov 10
2025
|
Shankar Arumugavelu Director |
SELL
Open market or private sale
|
Direct |
5,000
-39.6%
|
$1,470,000
$294.56 P/Share
|
|
Nov 05
2025
|
Ban Seng Teh EVP & Chief Commercial Officer |
SELL
Open market or private sale
|
Direct |
6,000
-33.26%
|
$1,620,000
$270.0 P/Share
|
|
Nov 03
2025
|
William D Mosley CEO |
SELL
Open market or private sale
|
Direct |
20,000
-0.32%
|
$5,220,000
$261.5 P/Share
|
|
Nov 03
2025
|
Stephanie Tilenius Director |
SELL
Open market or private sale
|
Direct |
2,046
-14.32%
|
$544,236
$266.41 P/Share
|
|
Oct 31
2025
|
Jay L Geldmacher Director |
SELL
Open market or private sale
|
Direct |
1,250
-52.13%
|
$336,250
$269.1 P/Share
|
|
Oct 30
2025
|
Kian Fatt Chong EVP Global Operations |
SELL
Open market or private sale
|
Direct |
7,078
-100.0%
|
$1,925,216
$272.14 P/Share
|
|
Oct 22
2025
|
James Ci Lee EVP & CLO |
SELL
Payment of exercise price or tax liability
|
Direct |
540
-36.14%
|
$116,100
$215.05 P/Share
|
|
Oct 22
2025
|
James Ci Lee EVP & CLO |
BUY
Exercise of conversion of derivative security
|
Direct |
1,237
+45.29%
|
-
|
|
Oct 19
2025
|
Judy Bruner Director |
SELL
Payment of exercise price or tax liability
|
Indirect |
647
-4.32%
|
$145,575
$225.4 P/Share
|
|
Oct 19
2025
|
Judy Bruner Director |
BUY
Exercise of conversion of derivative security
|
Indirect |
2,693
+15.25%
|
-
|
|
Oct 19
2025
|
Shankar Arumugavelu Director |
SELL
Payment of exercise price or tax liability
|
Direct |
647
-4.87%
|
$145,575
$225.4 P/Share
|
|
Oct 19
2025
|
Shankar Arumugavelu Director |
BUY
Exercise of conversion of derivative security
|
Direct |
2,693
+16.87%
|
-
|
|
Oct 19
2025
|
Mark Adams Director |
SELL
Payment of exercise price or tax liability
|
Direct |
647
-24.03%
|
$145,575
$225.4 P/Share
|
|
Oct 19
2025
|
Mark Adams Director |
BUY
Exercise of conversion of derivative security
|
Direct |
2,693
+50.0%
|
-
|
|
Oct 19
2025
|
Jay L Geldmacher Director |
SELL
Payment of exercise price or tax liability
|
Direct |
647
-21.25%
|
$145,575
$225.4 P/Share
|
|
Oct 19
2025
|
Jay L Geldmacher Director |
BUY
Exercise of conversion of derivative security
|
Direct |
2,693
+46.93%
|
-
|
|
Oct 19
2025
|
Yolanda Lee Conyers Director |
SELL
Payment of exercise price or tax liability
|
Direct |
647
-9.25%
|
$145,575
$225.4 P/Share
|
|
Oct 19
2025
|
Yolanda Lee Conyers Director |
BUY
Exercise of conversion of derivative security
|
Direct |
2,693
+27.79%
|
-
|
|
Oct 19
2025
|
Richard L Clemmer Director |
SELL
Payment of exercise price or tax liability
|
Direct |
647
-2.13%
|
$145,575
$225.4 P/Share
|
|
Oct 19
2025
|
Richard L Clemmer Director |
BUY
Exercise of conversion of derivative security
|
Direct |
2,693
+8.15%
|
-
|
|
Oct 19
2025
|
Stephanie Tilenius Director |
SELL
Payment of exercise price or tax liability
|
Direct |
647
-4.33%
|
$145,575
$225.4 P/Share
|
|
Oct 19
2025
|
Stephanie Tilenius Director |
BUY
Exercise of conversion of derivative security
|
Direct |
2,693
+15.28%
|
-
|
|
Oct 19
2025
|
Dylan G. Haggart Director |
SELL
Payment of exercise price or tax liability
|
Direct |
647
-4.27%
|
$145,575
$225.4 P/Share
|
|
Oct 19
2025
|
Dylan G. Haggart Director |
BUY
Exercise of conversion of derivative security
|
Direct |
2,693
+15.08%
|
-
|