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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.

-$357.3M net selling - trailing 90 days

0 buyers - 10 unique sellers

Historical context: most recent complete month (2026-09) is the 2nd percentile of this ticker's monthly net P/S flow over 24 complete months. Lower percentiles are more selling; higher are more buying. P10–P90: -$49.9M to -$2.0M.

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 -$244.7M2026-10 -$23.7MOct 24Dec 24Feb 25Apr 25Jun 25Aug 25Oct 25Dec 25Feb 26Apr 26Jun 26Aug 26Oct 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 -~$103.3M 41
Romano Gianluca EVP & CFO -~$79.3M 34
MOSLEY WILLIAM D CEO -~$60.3M 64
Teh Ban Seng EVP & Chief Commercial Officer -~$41.2M 25
Romano Gianluca EVP & CFO -~$21.4M 46
Morris John Christopher EVP & CTO -~$20.3M 20
Teh Ban Seng EVP & Chief Commercial Officer -~$18.0M 35
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
October 1, 2026 MOSLEY WILLIAM D CEO 37 reported sale rows 25744 — ~$23.7M
September 21, 2026 Morris John Christopher EVP & CTO 16 reported sale rows 8554 — ~$7.5M
September 15, 2026 Teh Ban Seng EVP & Chief Commercial Officer 23 reported sale rows 50970 — ~$39.8M
September 15, 2026 Morris John Christopher EVP & CTO S -15465.5 772.1512 ~$11.9M
September 15, 2026 MOSLEY WILLIAM D CEO S -97889.25 772.1432 ~$75.6M
September 15, 2026 Romano Gianluca EVP & CFO S -49983.5 772.1573 ~$38.6M
September 14, 2026 MOSLEY WILLIAM D CEO S -1869.75 781.2254 ~$1.5M
September 14, 2026 Morris John Christopher EVP & CTO S -492.75 781.2325 ~$0.4M
September 14, 2026 Teh Ban Seng EVP & Chief Commercial Officer S -989 779 ~$0.8M
September 14, 2026 Romano Gianluca EVP & CFO S -955 781.2429 ~$0.7M
September 11, 2026 Romano Gianluca EVP & CFO 30 reported sale rows 46698 — ~$38.8M
September 10, 2026 Romano Gianluca EVP & CFO 2 reported sale rows 1348 — ~$1.2M
September 10, 2026 Morris John Christopher EVP & CTO 2 reported sale rows 572.25 — ~$0.5M
September 10, 2026 MOSLEY WILLIAM D CEO 2 reported sale rows 2849.25 — ~$2.5M
September 10, 2026 Teh Ban Seng EVP & Chief Commercial Officer S -663 860.09 ~$0.6M
September 1, 2026 MOSLEY WILLIAM D CEO 22 reported sale rows 29080 — ~$23.7M
September 1, 2026 Conyers Yolanda Lee — S -750 815.11 ~$0.6M
August 24, 2026 Lee James CI EVP & CLO 17 reported sale rows 6293 — ~$5.0M
August 21, 2026 Morris John Christopher EVP & CTO 3 reported sale rows 3515.5 — ~$3.0M
August 21, 2026 Teh Ban Seng EVP & Chief Commercial Officer 20 reported sale rows 8262 — ~$7.0M
August 21, 2026 Romano Gianluca EVP & CFO 3 reported sale rows 9076.25 — ~$7.7M
August 21, 2026 MOSLEY WILLIAM D CEO 3 reported sale rows 18138.5 — ~$15.4M
August 21, 2026 Lee James CI EVP & CLO 3 reported sale rows 3938.75 — ~$3.3M
August 20, 2026 Teh Ban Seng EVP & Chief Commercial Officer 13 reported sale rows 4928 — ~$4.2M
August 20, 2026 Morris John Christopher EVP & CTO S -523 835.54 ~$0.4M
August 13, 2026 Teh Ban Seng EVP & Chief Commercial Officer 2 reported sale rows 7361 — ~$6.8M
August 7, 2026 Romano Gianluca EVP & CFO 43 reported sale rows 17011 — ~$13.7M
August 3, 2026 MOSLEY WILLIAM D CEO 39 reported sale rows 25880 — ~$21.2M
August 3, 2026 Morris John Christopher EVP & CTO S -168 817.76 ~$0.1M
July 30, 2026 Lee James CI EVP & CLO S -694 877.45 ~$0.6M
July 23, 2026 Lee James CI EVP & CLO S -542.25 905.0087 ~$0.5M
July 1, 2026 MOSLEY WILLIAM D CEO 38 reported sale rows 27280 — ~$25.0M
June 12, 2026 Morris John Christopher EVP & CTO 2 reported sale rows 1364 — ~$1.2M
June 12, 2026 MOSLEY WILLIAM D CEO S -1768.25 880.1888 ~$1.6M
June 12, 2026 Romano Gianluca EVP & CFO S -903.25 880.1873 ~$0.8M
June 12, 2026 Teh Ban Seng EVP & Chief Commercial Officer S -989 880.19 ~$0.9M
June 10, 2026 Teh Ban Seng EVP & Chief Commercial Officer S -663 821.86 ~$0.5M
June 10, 2026 Romano Gianluca EVP & CFO 2 reported sale rows 1350.5 — ~$1.1M
June 10, 2026 MOSLEY WILLIAM D CEO 2 reported sale rows 2854.75 — ~$2.3M
June 10, 2026 Morris John Christopher EVP & CTO 2 reported sale rows 573.75 — ~$0.5M
June 4, 2026 Arumugavelu Shankar — S -1000 927.68 ~$0.9M
June 2, 2026 BHATT PRAT — S -1000 929.88 ~$0.9M
June 1, 2026 MOSLEY WILLIAM D CEO 38 reported sale rows 25440 — ~$23.2M
June 1, 2026 Conyers Yolanda Lee — S -750 885.33 ~$0.7M
May 20, 2026 MOSLEY WILLIAM D CEO 17 reported sale rows 29800 — ~$22.4M
May 14, 2026 Teh Ban Seng EVP & Chief Commercial Officer S -8003 817.2842 ~$6.5M
May 13, 2026 Teh Ban Seng EVP & Chief Commercial Officer 17 reported sale rows 6957 — ~$5.7M
May 7, 2026 Romano Gianluca EVP & CFO S -1902 770 ~$1.5M
May 6, 2026 Romano Gianluca EVP & CFO 22 reported sale rows 18848 — ~$14.6M
May 5, 2026 Tilenius Stephanie — 2 reported sale rows 1580 — ~$1.2M
May 4, 2026 Morris John Christopher EVP & CTO 14 reported sale rows 5626 — ~$4.2M
May 4, 2026 Lee James CI EVP & CLO S -697 741.17 ~$0.5M
April 1, 2026 MOSLEY WILLIAM D CEO 13 reported sale rows 16600 — ~$7.0M
March 19, 2026 MOSLEY WILLIAM D CEO S -24584 406.77 ~$10.0M
March 13, 2026 Morris John Christopher EVP & CTO S -112 377.44 ~$42K
March 2, 2026 MOSLEY WILLIAM D CEO 13 reported sale rows 14100 — ~$5.4M
March 2, 2026 Conyers Yolanda Lee — S -750 393.59 ~$0.3M
February 24, 2026 Morris John Christopher EVP & CTO S -240 410 ~$98K
February 23, 2026 Chong Kian Fatt EVP Global Operations S -5846 416.4797 ~$2.4M
February 2, 2026 MOSLEY WILLIAM D CEO 13 reported sale rows 19600 — ~$8.4M
January 30, 2026 Geldmacher Jay L — S -925 448.025 ~$0.4M
January 29, 2026 Teh Ban Seng EVP & Chief Commercial Officer 3 reported sale rows 20195 — ~$8.9M
January 26, 2026 Lee James CI EVP & CLO S -673 348.85 ~$0.2M
January 12, 2026 Teh Ban Seng EVP & Chief Commercial Officer S -1412 299.31 ~$0.4M
January 2, 2026 MOSLEY WILLIAM D CEO 9 reported sale rows 20000 — ~$5.7M
December 15, 2025 Morris John Christopher EVP & CTO S -113 291.89 ~$33K
December 11, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -2010 295.9 ~$0.6M
December 2, 2025 Conyers Yolanda Lee — S -750 272.91 ~$0.2M
December 1, 2025 MOSLEY WILLIAM D CEO 8 reported sale rows 20000 — ~$5.4M
November 13, 2025 Romano Gianluca EVP & CFO 8 reported sale rows 5202 — ~$1.4M
November 12, 2025 Romano Gianluca EVP & CFO 16 reported sale rows 52721 — ~$15.0M
November 11, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -1412 288.98 ~$0.4M
November 11, 2025 Lee James CI EVP & CLO S -697 288.98 ~$0.2M
November 10, 2025 Arumugavelu Shankar — S -5000 294.565 ~$1.5M
November 5, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -6000 270 ~$1.6M
November 3, 2025 MOSLEY WILLIAM D CEO 11 reported sale rows 18600 — ~$4.9M
November 3, 2025 Tilenius Stephanie — S -2046 266.4145 ~$0.5M
October 31, 2025 Geldmacher Jay L — S -1250 269.1 ~$0.3M
October 30, 2025 Chong Kian Fatt EVP Global Operations S -7078 272.1403 ~$1.9M
October 13, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -1410 225.56 ~$0.3M
October 1, 2025 MOSLEY WILLIAM D CEO 14 reported sale rows 15200 — ~$3.8M
September 16, 2025 Morris John Christopher EVP & CTO S -377 211.26 ~$80K
September 12, 2025 Morris John Christopher EVP & CTO 5 reported sale rows 15347 — ~$3.0M
September 11, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -3732 193.3 ~$0.7M
September 10, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -6781 191.53 ~$1.3M
September 2, 2025 MOSLEY WILLIAM D CEO 6 reported sale rows 20000 — ~$3.4M
September 2, 2025 Conyers Yolanda Lee — 3 reported sale rows 750 — ~$0.1M
August 11, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -1724 151.61 ~$0.3M
August 6, 2025 Geldmacher Jay L — S -2500 150.5 ~$0.4M
August 1, 2025 Lee James CI Chief Legal Officer S -1116 153.36 ~$0.2M
August 1, 2025 MOSLEY WILLIAM D Chief Executive Officer 6 reported sale rows 20000 — ~$3.1M
August 1, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -5905 155 ~$0.9M
July 31, 2025 Lee James CI Chief Legal Officer 6 reported sale rows 3509 — ~$0.5M
July 11, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -1725 144 ~$0.2M
July 1, 2025 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 — ~$2.9M
June 16, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -599 130 ~$78K
June 11, 2025 Teh Ban Seng EVP & Chief Commercial Officer 2 reported sale rows 3446 — ~$0.4M
June 9, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -3594 130 ~$0.5M
June 9, 2025 MOSLEY WILLIAM D Chief Executive Officer S -54347 130.1898 ~$7.1M
June 5, 2025 Tilenius Stephanie — S -2693 128.0362 ~$0.3M
June 4, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -63418 125.0007 ~$7.9M
June 3, 2025 MOSLEY WILLIAM D Chief Executive Officer S -50000 120.2711 ~$6.0M
June 3, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -11309 120 ~$1.4M
June 2, 2025 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 — ~$2.4M
June 2, 2025 Conyers Yolanda Lee — S -750 117.01 ~$88K
June 2, 2025 CANNON MICHAEL R — S -24190 119.0015 ~$2.9M
May 30, 2025 Romano Gianluca EVP & CFO 2 reported sale rows 26816 — ~$3.2M
May 29, 2025 Romano Gianluca EVP & CFO 2 reported sale rows 25018 — ~$2.9M
May 27, 2025 Teh Ban Seng EVP & Chief Commercial Officer S -4201 115 ~$0.5M
May 22, 2025 MOSLEY WILLIAM D Chief Executive Officer 12 reported sale rows 140000 — ~$15.3M
May 22, 2025 Chong Kian Fatt SVP, Global Operations S -6410 111.2556 ~$0.7M
May 22, 2025 BRUNER JUDY — S -10446 108.7075 ~$1.1M
April 1, 2025 MOSLEY WILLIAM D Chief Executive Officer 2 reported sale rows 20000 — ~$1.7M
March 3, 2025 MOSLEY WILLIAM D Chief Executive Officer 4 reported sale rows 20000 — ~$2.0M
March 3, 2025 Conyers Yolanda Lee — S -750 102.95 ~$77K
February 3, 2025 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 — ~$1.9M
January 2, 2025 MOSLEY WILLIAM D Chief Executive Officer 2 reported sale rows 20000 — ~$1.7M
December 12, 2024 Morris John Christopher SVP & CTO S -141 98.46 ~$14K
December 10, 2024 Morris John Christopher SVP & CTO S -75 98.85 ~$7K
December 2, 2024 Conyers Yolanda Lee — S -750 101.82 ~$76K
December 2, 2024 MOSLEY WILLIAM D Chief Executive Officer 4 reported sale rows 20000 — ~$2.1M
November 25, 2024 Romano Gianluca EVP & CFO 2 reported sale rows 47268 — ~$4.8M
November 22, 2024 Romano Gianluca EVP & CFO S -21686 100.3951 ~$2.2M
November 8, 2024 Chong Kian Fatt SVP, Global Operations S -9182 105.5 ~$1.0M
November 1, 2024 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 — ~$2.0M
October 24, 2024 Geldmacher Jay L — S -4100 103.3 ~$0.4M
October 22, 2024 Morris John Christopher SVP & CTO S -1131 111.9 ~$0.1M
October 1, 2024 MOSLEY WILLIAM D Chief Executive Officer 3 reported sale rows 20000 — ~$2.2M
September 26, 2024 Teh Ban Seng EVP & Chief Commercial Officer S -4872 110 ~$0.5M
September 26, 2024 MOSLEY WILLIAM D Chief Executive Officer S -141785 110.1755 ~$15.6M
September 16, 2024 Morris John Christopher SVP & CTO S -2531 101.83 ~$0.3M
September 12, 2024 Morris John Christopher SVP & CTO S -565 101.96 ~$58K
September 10, 2024 Morris John Christopher SVP & CTO S -9414 101.27 ~$1.0M