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STX Seagate Technology Holdings PLC Ordinary Shares (Ireland)

Insider figures are trailing 90 days, open-market Form 4 only. Institutional figures are the latest reported quarter. These windows are not simultaneous.

-$351.0M net selling - trailing 90 days

0 buyers - 10 unique sellers

Historical context: most recent complete month (2026-08) is the 2nd percentile of this ticker's monthly net P/S flow over 23 complete months (limited history). Lower percentiles are more selling; higher are more buying.

Institutional activity: not available - insufficient comparable institutions for the latest complete quarter.

open-market Form 4 only - grants, exercises, tax withholding excluded. ~ derived from SEC-reported shares x price.

Insider net $ (monthly)open-market Form 4 only - grants, exercises, tax withholding excluded$500.0M$250.0M$0-$250.0M-$500.0M2024-10 -$2.7M2024-11 -$10.0M2024-12 -$2.2M2025-01 -$1.7M2025-02 -$1.9M2025-03 -$2.1M2025-04 -$1.7M2025-05 -$16.1M2025-06 -$28.8M2025-07 -$3.7M2025-08 -$4.8M2025-09 -$8.6M2025-10 -$6.4M2025-11 -$25.5M2025-12 -$6.3M2026-01 -$15.7M2026-02 -$11.0M2026-03 -$15.7M2026-04 -$7.0M2026-05 -$56.5M2026-06 -$34.6M2026-07 -$26.1M2026-08 -$87.8M2026-09 -$237.2MOct 24Dec 24Feb 25Apr 25Jun 25Aug 25Oct 25Dec 25Feb 26Apr 26Jun 26Aug 26~ derived from SEC-reported shares x price. Hatched: excluded (implausible price) or unpriced.

Institutional activity: not available - insufficient comparable institutions for the latest complete quarter.

Who is responsible

Insider Role Net activity Rows
MOSLEY WILLIAM D CEO -~$85.3M 102
MOSLEY WILLIAM D CEO -~$79.5M 4
Romano Gianluca EVP & CFO -~$79.3M 34
Teh Ban Seng EVP & Chief Commercial Officer -~$41.2M 25
Romano Gianluca EVP & CFO -~$21.4M 46
Teh Ban Seng EVP & Chief Commercial Officer -~$18.0M 35
Morris John Christopher EVP & CTO -~$12.8M 4
Lee James CI EVP & CLO -~$9.4M 22
Morris John Christopher EVP & CTO -~$3.6M 5
Conyers Yolanda Lee -~$0.6M 1

Transactions

Date Insider Role Type Shares Price Value
9/15/2026 Teh Ban Seng EVP & Chief Commercial Officer 23 reported sale rows 50970 ~$39.8M
9/15/2026 MOSLEY WILLIAM D CEO S -97889.25 772.1432 ~$75.6M
9/15/2026 Romano Gianluca EVP & CFO S -49983.5 772.1573 ~$38.6M
9/15/2026 Morris John Christopher EVP & CTO S -15465.5 772.1512 ~$11.9M
9/14/2026 Teh Ban Seng EVP & Chief Commercial Officer S -989 779 ~$0.8M
9/14/2026 Romano Gianluca EVP & CFO S -955 781.2429 ~$0.7M
9/14/2026 Morris John Christopher EVP & CTO S -492.75 781.2325 ~$0.4M
9/14/2026 MOSLEY WILLIAM D CEO S -1869.75 781.2254 ~$1.5M
9/11/2026 Romano Gianluca EVP & CFO 30 reported sale rows 46698 ~$38.8M
9/10/2026 MOSLEY WILLIAM D CEO 2 reported sale rows 2849.25 ~$2.5M
9/10/2026 Romano Gianluca EVP & CFO 2 reported sale rows 1348 ~$1.2M
9/10/2026 Morris John Christopher EVP & CTO 2 reported sale rows 572.25 ~$0.5M
9/10/2026 Teh Ban Seng EVP & Chief Commercial Officer S -663 860.09 ~$0.6M
9/1/2026 MOSLEY WILLIAM D CEO 22 reported sale rows 29080 ~$23.7M
9/1/2026 Conyers Yolanda Lee S -750 815.11 ~$0.6M
8/24/2026 Lee James CI EVP & CLO 17 reported sale rows 6293 ~$5.0M
8/21/2026 MOSLEY WILLIAM D CEO 3 reported sale rows 18138.5 ~$15.4M
8/21/2026 Romano Gianluca EVP & CFO 3 reported sale rows 9076.25 ~$7.7M
8/21/2026 Lee James CI EVP & CLO 3 reported sale rows 3938.75 ~$3.3M
8/21/2026 Morris John Christopher EVP & CTO 3 reported sale rows 3515.5 ~$3.0M
8/21/2026 Teh Ban Seng EVP & Chief Commercial Officer 20 reported sale rows 8262 ~$7.0M
8/20/2026 Teh Ban Seng EVP & Chief Commercial Officer 13 reported sale rows 4928 ~$4.2M
8/20/2026 Morris John Christopher EVP & CTO S -523 835.54 ~$0.4M
8/13/2026 Teh Ban Seng EVP & Chief Commercial Officer 2 reported sale rows 7361 ~$6.8M
8/7/2026 Romano Gianluca EVP & CFO 43 reported sale rows 17011 ~$13.7M
8/3/2026 MOSLEY WILLIAM D CEO 39 reported sale rows 25880 ~$21.2M
8/3/2026 Morris John Christopher EVP & CTO S -168 817.76 ~$0.1M
7/30/2026 Lee James CI EVP & CLO S -694 877.45 ~$0.6M
7/23/2026 Lee James CI EVP & CLO S -542.25 905.0087 ~$0.5M
7/1/2026 MOSLEY WILLIAM D CEO 38 reported sale rows 27280 ~$25.0M
6/12/2026 Morris John Christopher EVP & CTO 2 reported sale rows 1364 ~$1.2M
6/12/2026 Romano Gianluca EVP & CFO S -903.25 880.1873 ~$0.8M
6/12/2026 Teh Ban Seng EVP & Chief Commercial Officer S -989 880.19 ~$0.9M
6/12/2026 MOSLEY WILLIAM D CEO S -1768.25 880.1888 ~$1.6M
6/10/2026 Teh Ban Seng EVP & Chief Commercial Officer S -663 821.86 ~$0.5M
6/10/2026 MOSLEY WILLIAM D CEO 2 reported sale rows 2854.75 ~$2.3M
6/10/2026 Romano Gianluca EVP & CFO 2 reported sale rows 1350.5 ~$1.1M
6/10/2026 Morris John Christopher EVP & CTO 2 reported sale rows 573.75 ~$0.5M
6/4/2026 Arumugavelu Shankar S -1000 927.68 ~$0.9M
6/2/2026 BHATT PRAT S -1000 929.88 ~$0.9M
6/1/2026 MOSLEY WILLIAM D CEO 38 reported sale rows 25440 ~$23.2M
6/1/2026 Conyers Yolanda Lee S -750 885.33 ~$0.7M
5/20/2026 MOSLEY WILLIAM D CEO 17 reported sale rows 29800 ~$22.4M
5/14/2026 Teh Ban Seng EVP & Chief Commercial Officer S -8003 817.2842 ~$6.5M
5/13/2026 Teh Ban Seng EVP & Chief Commercial Officer 17 reported sale rows 6957 ~$5.7M
5/7/2026 Romano Gianluca EVP & CFO S -1902 770 ~$1.5M
5/6/2026 Romano Gianluca EVP & CFO 22 reported sale rows 18848 ~$14.6M
5/5/2026 Tilenius Stephanie 2 reported sale rows 1580 ~$1.2M
5/4/2026 Morris John Christopher EVP & CTO 14 reported sale rows 5626 ~$4.2M
5/4/2026 Lee James CI EVP & CLO S -697 741.17 ~$0.5M
4/1/2026 MOSLEY WILLIAM D CEO 13 reported sale rows 16600 ~$7.0M
3/19/2026 MOSLEY WILLIAM D CEO S -24584 406.77 ~$10.0M
3/13/2026 Morris John Christopher EVP & CTO S -112 377.44 ~$42K
3/2/2026 MOSLEY WILLIAM D CEO 13 reported sale rows 14100 ~$5.4M
3/2/2026 Conyers Yolanda Lee S -750 393.59 ~$0.3M
2/24/2026 Morris John Christopher EVP & CTO S -240 410 ~$98K
2/23/2026 Chong Kian Fatt EVP Global Operations S -5846 416.4797 ~$2.4M
2/2/2026 MOSLEY WILLIAM D CEO 13 reported sale rows 19600 ~$8.4M
1/30/2026 Geldmacher Jay L S -925 448.025 ~$0.4M
1/29/2026 Teh Ban Seng EVP & Chief Commercial Officer 3 reported sale rows 20195 ~$8.9M
1/26/2026 Lee James CI EVP & CLO S -673 348.85 ~$0.2M
1/12/2026 Teh Ban Seng EVP & Chief Commercial Officer S -1412 299.31 ~$0.4M
1/2/2026 MOSLEY WILLIAM D CEO 9 reported sale rows 20000 ~$5.7M
12/15/2025 Morris John Christopher EVP & CTO S -113 291.89 ~$33K
12/11/2025 Teh Ban Seng EVP & Chief Commercial Officer S -2010 295.9 ~$0.6M
12/2/2025 Conyers Yolanda Lee S -750 272.91 ~$0.2M
12/1/2025 MOSLEY WILLIAM D CEO 8 reported sale rows 20000 ~$5.4M
11/13/2025 Romano Gianluca EVP & CFO 8 reported sale rows 5202 ~$1.4M
11/12/2025 Romano Gianluca EVP & CFO 16 reported sale rows 52721 ~$15.0M
11/11/2025 Lee James CI EVP & CLO S -697 288.98 ~$0.2M
11/11/2025 Teh Ban Seng EVP & Chief Commercial Officer S -1412 288.98 ~$0.4M
11/10/2025 Arumugavelu Shankar S -5000 294.565 ~$1.5M
11/5/2025 Teh Ban Seng EVP & Chief Commercial Officer S -6000 270 ~$1.6M
11/3/2025 MOSLEY WILLIAM D CEO 11 reported sale rows 18600 ~$4.9M
11/3/2025 Tilenius Stephanie S -2046 266.4145 ~$0.5M
10/31/2025 Geldmacher Jay L S -1250 269.1 ~$0.3M
10/30/2025 Chong Kian Fatt EVP Global Operations S -7078 272.1403 ~$1.9M
10/13/2025 Teh Ban Seng EVP & Chief Commercial Officer S -1410 225.56 ~$0.3M
10/1/2025 MOSLEY WILLIAM D CEO 14 reported sale rows 15200 ~$3.8M
9/16/2025 Morris John Christopher EVP & CTO S -377 211.26 ~$80K
9/12/2025 Morris John Christopher EVP & CTO 5 reported sale rows 15347 ~$3.0M
9/11/2025 Teh Ban Seng EVP & Chief Commercial Officer S -3732 193.3 ~$0.7M
9/10/2025 Teh Ban Seng EVP & Chief Commercial Officer S -6781 191.53 ~$1.3M
9/2/2025 MOSLEY WILLIAM D CEO 6 reported sale rows 20000 ~$3.4M
9/2/2025 Conyers Yolanda Lee 3 reported sale rows 750 ~$0.1M
8/11/2025 Teh Ban Seng EVP & Chief Commercial Officer S -1724 151.61 ~$0.3M
8/6/2025 Geldmacher Jay L S -2500 150.5 ~$0.4M
8/1/2025 Lee James CI Chief Legal Officer S -1116 153.36 ~$0.2M
8/1/2025 MOSLEY WILLIAM D Chief Executive Officer 6 reported sale rows 20000 ~$3.1M
8/1/2025 Teh Ban Seng EVP & Chief Commercial Officer S -5905 155 ~$0.9M
7/31/2025 Lee James CI Chief Legal Officer 6 reported sale rows 3509 ~$0.5M
7/11/2025 Teh Ban Seng EVP & Chief Commercial Officer S -1725 144 ~$0.2M
7/1/2025 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 ~$2.9M
6/16/2025 Teh Ban Seng EVP & Chief Commercial Officer S -599 130 ~$78K
6/11/2025 Teh Ban Seng EVP & Chief Commercial Officer 2 reported sale rows 3446 ~$0.4M
6/9/2025 Teh Ban Seng EVP & Chief Commercial Officer S -3594 130 ~$0.5M
6/9/2025 MOSLEY WILLIAM D Chief Executive Officer S -54347 130.1898 ~$7.1M
6/5/2025 Tilenius Stephanie S -2693 128.0362 ~$0.3M
6/4/2025 Teh Ban Seng EVP & Chief Commercial Officer S -63418 125.0007 ~$7.9M
6/3/2025 Teh Ban Seng EVP & Chief Commercial Officer S -11309 120 ~$1.4M
6/3/2025 MOSLEY WILLIAM D Chief Executive Officer S -50000 120.2711 ~$6.0M
6/2/2025 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 ~$2.4M
6/2/2025 CANNON MICHAEL R S -24190 119.0015 ~$2.9M
6/2/2025 Conyers Yolanda Lee S -750 117.01 ~$88K
5/30/2025 Romano Gianluca EVP & CFO 2 reported sale rows 26816 ~$3.2M
5/29/2025 Romano Gianluca EVP & CFO 2 reported sale rows 25018 ~$2.9M
5/27/2025 Teh Ban Seng EVP & Chief Commercial Officer S -4201 115 ~$0.5M
5/22/2025 MOSLEY WILLIAM D Chief Executive Officer 12 reported sale rows 140000 ~$15.3M
5/22/2025 BRUNER JUDY S -10446 108.7075 ~$1.1M
5/22/2025 Chong Kian Fatt SVP, Global Operations S -6410 111.2556 ~$0.7M
4/1/2025 MOSLEY WILLIAM D Chief Executive Officer 2 reported sale rows 20000 ~$1.7M
3/3/2025 MOSLEY WILLIAM D Chief Executive Officer 4 reported sale rows 20000 ~$2.0M
3/3/2025 Conyers Yolanda Lee S -750 102.95 ~$77K
2/3/2025 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 ~$1.9M
1/2/2025 MOSLEY WILLIAM D Chief Executive Officer 2 reported sale rows 20000 ~$1.7M
12/12/2024 Morris John Christopher SVP & CTO S -141 98.46 ~$14K
12/10/2024 Morris John Christopher SVP & CTO S -75 98.85 ~$7K
12/2/2024 MOSLEY WILLIAM D Chief Executive Officer 4 reported sale rows 20000 ~$2.1M
12/2/2024 Conyers Yolanda Lee S -750 101.82 ~$76K
11/25/2024 Romano Gianluca EVP & CFO 2 reported sale rows 47268 ~$4.8M
11/22/2024 Romano Gianluca EVP & CFO S -21686 100.3951 ~$2.2M
11/8/2024 Chong Kian Fatt SVP, Global Operations S -9182 105.5 ~$1.0M
11/1/2024 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 ~$2.0M
10/24/2024 Geldmacher Jay L S -4100 103.3 ~$0.4M
10/22/2024 Morris John Christopher SVP & CTO S -1131 111.9 ~$0.1M
10/1/2024 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 ~$2.2M
9/26/2024 Teh Ban Seng EVP & Chief Commercial Officer S -4872 110 ~$0.5M
9/26/2024 MOSLEY WILLIAM D Chief Executive Officer S -141785 110.1755 ~$15.6M
9/16/2024 Morris John Christopher SVP & CTO S -2531 101.83 ~$0.3M
9/12/2024 Morris John Christopher SVP & CTO S -565 101.96 ~$58K
9/10/2024 Morris John Christopher SVP & CTO S -9414 101.27 ~$1.0M